Search results

Search for "photocurrent" in Full Text gives 104 result(s) in Beilstein Journal of Nanotechnology.

Excitonic and electronic transitions in Me–Sb2Se3 structures

  • Nicolae N. Syrbu,
  • Victor V. Zalamai,
  • Ivan G. Stamov and
  • Stepan I. Beril

Beilstein J. Nanotechnol. 2020, 11, 1045–1053, doi:10.3762/bjnano.11.89

Graphical Abstract
  • that is characteristic of the conductivity hopping mechanism which in turn is independent of the metal type and the deposition method used. The photocurrent increases when the energy of the photons increases in the Schottky barriers when the transparent contacts are illuminated. The structures with the
  • contacts deposited onto one side of the crystal are photosensitive. At the same time, the contact deposition onto opposite sides of the crystal planes leads to the appearance of a photo-electromotive force (EMF) with a magnitude of up to 150 mV. The photocurrent increases when a positive voltage is applied
  • minimum region. It is highly likely that the photoconductivity maxima are due to excitonic ground states (n = 1) in the aforementioned polarization conditions. In addition, the photocurrent increases when the bias increases. For the unpolarized light case, the photoconductivity spectra have a narrow
PDF
Album
Full Research Paper
Published 16 Jul 2020

A new photodetector structure based on graphene nanomeshes: an ab initio study

  • Babak Sakkaki,
  • Hassan Rasooli Saghai,
  • Ghafar Darvish and
  • Mehdi Khatir

Beilstein J. Nanotechnol. 2020, 11, 1036–1044, doi:10.3762/bjnano.11.88

Graphical Abstract
  • , and then proceed with the design of the photodetector based on a suitable material. We further calculate the transport and photocurrent of the devices. To demonstrate improved performance of the proposed devices, we perform simulations on three types of devices. Graphene, GNMs and GNRs are materials
  • permittivity and system volume, respectively. The relative dielectric constant, εr, is related to the susceptibility, χ, as [26][27]: The photocurrent is calculated by first-order perturbation theory in the framework of the Born approximation. In short, light–electron interaction is added to the Hamiltonian as
  • materials using optical analysis. Finally, by calculating the photocurrent of the detectors based on these materials, we discuss the benefits of using them as infrared detectors. Armchair graphene nanoribbons (AGNRs) are often classified into three families, namely 3m, 3m + 1, and 3m + 2 (m is a positive
PDF
Album
Full Research Paper
Published 15 Jul 2020

Electrochemical nanostructuring of (111) oriented GaAs crystals: from porous structures to nanowires

  • Elena I. Monaico,
  • Eduard V. Monaico,
  • Veaceslav V. Ursaki,
  • Shashank Honnali,
  • Vitalie Postolache,
  • Karin Leistner,
  • Kornelius Nielsch and
  • Ion M. Tiginyanu

Beilstein J. Nanotechnol. 2020, 11, 966–975, doi:10.3762/bjnano.11.81

Graphical Abstract
  • previously obtained through anodizing GaAs(100) wafers in alkaline KOH electrolyte. An IR photodetector based on the GaAs nanowires is demonstrated. Keywords: anodization; crystallographically oriented pores; gallium arsenide (GaAs); nanowires; neutral electrolyte; photocurrent; porous GaAs; Introduction
  • of the Figure 7A. The photocurrent build-up and relaxation for a photodetector produced on a nanowire with a diameter of 400 nm is presented in Figure 7B for an IR illumination density of 800 mW·cm−2. One can see that the current increases by a factor of four in magnitude under illumination with IR
  • photocurrent of the photodetector, Idark is the dark current, and Pill is the illumination power on the photodetector. The calculated responsivity of the GaAs nanowire photodetector equals 100 mA·W−1, according to the data presented in Figure 7B for a nanowire with a diameter of 400 nm and a length of 20 µm
PDF
Album
Full Research Paper
Published 29 Jun 2020

Band tail state related photoluminescence and photoresponse of ZnMgO solid solution nanostructured films

  • Vadim Morari,
  • Aida Pantazi,
  • Nicolai Curmei,
  • Vitalie Postolache,
  • Emil V. Rusu,
  • Marius Enachescu,
  • Ion M. Tiginyanu and
  • Veaceslav V. Ursaki

Beilstein J. Nanotechnol. 2020, 11, 899–910, doi:10.3762/bjnano.11.75

Graphical Abstract
  • characteristics and the photocurrent of the photodetector structures were measured with a Keithley 2400 Source Meter Unit (SMU). a) SEM images of ZnMgO films deposited on p-Si substrates by spin coating (left column) and aerosol deposition (right column) methods. b) Graphical representations of the AFM profiles
PDF
Album
Full Research Paper
Published 12 Jun 2020

Synthesis and enhanced photocatalytic performance of 0D/2D CuO/tourmaline composite photocatalysts

  • Changqiang Yu,
  • Min Wen,
  • Zhen Tong,
  • Shuhua Li,
  • Yanhong Yin,
  • Xianbin Liu,
  • Yesheng Li,
  • Tongxiang Liang,
  • Ziping Wu and
  • Dionysios D. Dionysiou

Beilstein J. Nanotechnol. 2020, 11, 407–416, doi:10.3762/bjnano.11.31

Graphical Abstract
  • . The transient photocurrent was measured with two Interface 1010E electrochemical workstations (Gamry, USA) using Na2SO3 (0.2 M) and Na2S (0.2 M) solutions with a volume ratio of 1:1 as electrolyte under LED lamp (λ = 470 nm) irradiation for 20 min. The samples were prepared as follows: Firstly, 10 mg
  • transient photocurrent density of the CuO/tourmaline composite was higher than that of pristine CuO during the repeated switching on and off of light irradiation (Figure 5c), implying that tourmaline could facilitate the transfer of photoinduced e−, which was also confirmed by the PL spectra (Supporting
  • Information File 1, Figure S1). Generally speaking, the higher the transient photocurrent density, the smaller the electrochemical impedance spectra (EIS) [33][34]. According to the time-resolved PL spectra in Figure 5d, the average fluorescence lifetime of the CuO/tourmaline composite (2.94 ns) was shortened
PDF
Album
Supp Info
Full Research Paper
Published 02 Mar 2020

Implementation of data-cube pump–probe KPFM on organic solar cells

  • Benjamin Grévin,
  • Olivier Bardagot and
  • Renaud Demadrille

Beilstein J. Nanotechnol. 2020, 11, 323–337, doi:10.3762/bjnano.11.24

Graphical Abstract
  • deposition system (Kurt J. Lesker) for deposition of Ca (20 nm, 1.0 Å∙s−1) and Al (100 nm, 2.0 Å∙s−1) top electrodes (10.18 ± 0.1 mm2). The electrical characterization was performed in a glovebox. Current-density–voltage (J–V) curves were measured using a Keithley 2400 source measure unit. The photocurrent
PDF
Album
Supp Info
Full Research Paper
Published 12 Feb 2020

Molecular architectonics of DNA for functional nanoarchitectures

  • Debasis Ghosh,
  • Lakshmi P. Datta and
  • Thimmaiah Govindaraju

Beilstein J. Nanotechnol. 2020, 11, 124–140, doi:10.3762/bjnano.11.11

Graphical Abstract
  • the dTn chain length and temperature [85]. The multichromophoric array of NDI and oligo-dTn assembled over a gold substrate showed photocurrent generation due to electron conduction because of the π‐stacked array of the NDI assembly. In their next design approach, two separate zinc binding systems, Zn
  • photocurrent (Figure 7b). However, the randomly assembled array of DPPNDI–dT40 immobilized across the gold electrode was unable to generate any photocurrent response owing to ground-state CT complexation of DPP with NDI in their random arrangement (Figure 7c). Tanaka, Ono, and co-workers reported the
PDF
Album
Review
Published 09 Jan 2020

Semitransparent Sb2S3 thin film solar cells by ultrasonic spray pyrolysis for use in solar windows

  • Jako S. Eensalu,
  • Atanas Katerski,
  • Erki Kärber,
  • Lothar Weinhardt,
  • Monika Blum,
  • Clemens Heske,
  • Wanli Yang,
  • Ilona Oja Acik and
  • Malle Krunks

Beilstein J. Nanotechnol. 2019, 10, 2396–2409, doi:10.3762/bjnano.10.230

Graphical Abstract
  • photocurrent density and PCE (of 1.9%) in solar cells based on Sb2S3 layers grown by USP was due to a discontinuity of the Sb2S3 layer [28]. In our recent study, we showed that the discontinuity of Sb2S3 films grown by USP, and likely other chemical methods, is a result of 3D island growth [46]. We
  • absorption coefficient curves of Sb2S3 and P3HT. The transmittance of light to the absorber is limited at higher photon energies by the onset of absorption of TiO2 at 3.0 eV and ITO at 3.6 eV. The P3HT layer, however, does not contribute to the generation of photocurrent [14][21]. On the contrary, any
  • compared to <10 mm2 cells (Table 2) due to about three times larger RS (26 Ω mm2) and about three times smaller RSH (190 Ω mm2) under both illuminated (Figure 3d) and dark conditions (Figure S3 in the Supporting Information File 1). Also, the photocurrent loss in larger cells originates from the increase
PDF
Album
Supp Info
Full Research Paper
Published 06 Dec 2019

Polyvinylpyrrolidone as additive for perovskite solar cells with water and isopropanol as solvents

  • Chen Du,
  • Shuo Wang,
  • Xu Miao,
  • Wenhai Sun,
  • Yu Zhu,
  • Chengyan Wang and
  • Ruixin Ma

Beilstein J. Nanotechnol. 2019, 10, 2374–2382, doi:10.3762/bjnano.10.228

Graphical Abstract
  • precursor solution is found to be effective in increasing the Voc. The short-circuit photocurrent density (Jsc) exhibits no significant difference, which has also been manifested by measuring the external quantum efficiency (EQE) of the two samples over the entire wavelength range from 350 to 800 nm (Figure
PDF
Album
Full Research Paper
Published 05 Dec 2019

Nontoxic pyrite iron sulfide nanocrystals as second electron acceptor in PTB7:PC71BM-based organic photovoltaic cells

  • Olivia Amargós-Reyes,
  • José-Luis Maldonado,
  • Omar Martínez-Alvarez,
  • María-Elena Nicho,
  • José Santos-Cruz,
  • Juan Nicasio-Collazo,
  • Irving Caballero-Quintana and
  • Concepción Arenas-Arrocena

Beilstein J. Nanotechnol. 2019, 10, 2238–2250, doi:10.3762/bjnano.10.216

Graphical Abstract
  • OPV sets were fabricated and tested, and the results followed the same trend. Figure 6a shows the best values measured. The external quantum efficiency (EQE) plots of the OPVs are shown in Figure 6b. The EQE curves indicate that the photocurrent is generated mainly in the 400–750 nm range, in
PDF
Album
Supp Info
Full Research Paper
Published 14 Nov 2019

Fabrication and characterization of Si1−xGex nanocrystals in as-grown and annealed structures: a comparative study

  • Muhammad Taha Sultan,
  • Adrian Valentin Maraloiu,
  • Ionel Stavarache,
  • Jón Tómas Gudmundsson,
  • Andrei Manolescu,
  • Valentin Serban Teodorescu,
  • Magdalena Lidia Ciurea and
  • Halldór Gudfinnur Svavarsson

Beilstein J. Nanotechnol. 2019, 10, 1873–1882, doi:10.3762/bjnano.10.182

Graphical Abstract
  • impulse magnetron sputtering (HiPIMS). The as-grown structures subsequently underwent rapid thermal annealing (550–900 °C for 1 min) in N2 ambient atmosphere. The structures were investigated using X-ray diffraction, high-resolution transmission electron microscopy together with spectral photocurrent
  • annealing results in the periodically arranged columnar self-assembly of SiGe core–shell nanocrystals. An increase in photocurrent intensity by more than an order of magnitude was achieved by annealing. Furthermore, a detailed discussion is provided on strain development within the structures, the
  • consequential interface characteristics and its effect on the photocurrent spectra. Keywords: grazing incidence XRD (GIXRD); high-power impulse magnetron sputtering (HiPIMS); HRTEM; magnetron sputtering; photocurrent spectra; SiGe nanocrystals in SiO2/SiGe/SiO2 multilayers; STEM-HAADF; TEM; Introduction
PDF
Album
Full Research Paper
Published 17 Sep 2019

Remarkable electronic and optical anisotropy of layered 1T’-WTe2 2D materials

  • Qiankun Zhang,
  • Rongjie Zhang,
  • Jiancui Chen,
  • Wanfu Shen,
  • Chunhua An,
  • Xiaodong Hu,
  • Mingli Dong,
  • Jing Liu and
  • Lianqing Zhu

Beilstein J. Nanotechnol. 2019, 10, 1745–1753, doi:10.3762/bjnano.10.170

Graphical Abstract
  • power of 1.4 mW (power density: 1.78 mW/cm2). Then a strategy similar to the above-mentioned DC test was implemented to obtain the wavelength-dependent photocurrent. As is shown in Figure 4a and Figure 4b, in contrast to the current in dark environment (Idark), both 0° and 60° Ids curves show a
  • nm and the power at 1.4 mW. Then a strategy comparable with the above-mentioned electronic test was performed to get the angle-resolved photocurrent with bias voltage of 5 mV. The real-time response curves are presented in Figure 5a, in which a more distinct photoelectric effect can be observed under
  • the daylight illumination using a household lamp. Meanwhile, a rapid increase and decrease in current reached the saturation value and the minimum value within about 200 ms, achieved by switching the laser on and off. Figure 5b shows the magnified change of the 60° photocurrent curve achieved by
PDF
Album
Correction
Full Research Paper
Published 20 Aug 2019

BiOCl/TiO2/diatomite composites with enhanced visible-light photocatalytic activity for the degradation of rhodamine B

  • Minlin Ao,
  • Kun Liu,
  • Xuekun Tang,
  • Zishun Li,
  • Qian Peng and
  • Jing Huang

Beilstein J. Nanotechnol. 2019, 10, 1412–1422, doi:10.3762/bjnano.10.139

Graphical Abstract
  • efficiency of the samples, photoluminescence spectroscopy, photocurrent and electrochemical impedance spectroscopy were tested. The recombination rate of photogenerated carriers (electrons and holes) in photocatalysts was characterized by photoluminescence spectra. Generally, the lower the spectral intensity
  • –hole separation and transfer, which can significantly improve the photocatalytic activity. Figure 10b shows the transient photocurrent response of the samples irradiated by visible light. The photocurrent is mainly generated by the migration and diffusion of photogenerated electrons and holes from the
  • internal structure of the material to its surface [48]. BTD shows the most prominent photocurrent density, proving that the carrier recombination rate is low and the lifetime is long, which contributes to the enhancement of photocatalytic activity. Electrochemical impedance spectroscopy (EIS) is one of the
PDF
Album
Supp Info
Full Research Paper
Published 16 Jul 2019

Construction of a 0D/1D composite based on Au nanoparticles/CuBi2O4 microrods for efficient visible-light-driven photocatalytic activity

  • Weilong Shi,
  • Mingyang Li,
  • Hongji Ren,
  • Feng Guo,
  • Xiliu Huang,
  • Yu Shi and
  • Yubin Tang

Beilstein J. Nanotechnol. 2019, 10, 1360–1367, doi:10.3762/bjnano.10.134

Graphical Abstract
  • photocatalytic activity after three cycles. This decrease of photocatalytic performance is mainly due to the mass of catalysts being inevitably lost in the recycling process [39]. Photocurrent response and electrochemical impedance spectroscopy (EIS) measurements were carried out to obtain some insights into the
  • photocatalytic activity of the Au/CBO composites. Figure 7a shows that both bare CBO and 2.5 wt % Au/CBO yield a photocurrent response under visible-light irradiation, but the photocurrent density of 2.5 wt % Au/CBO is much higher than that of the bare CBO. The combination of 0D Au NPs and 1D CBO microrods
  • using 2.5 wt % Au/CBO as a photocatalyst. (c) First-order kinetics of the TC degradation curves using different photocatalysts. (d) Three consecutive runs of TC degradation over 2.5 wt % Au/CBO photocatalyst. (a) Photocurrent response and (b) EIS spectra of bare CBO and 2.5 wt % Au/CBO composite under
PDF
Album
Supp Info
Full Research Paper
Published 04 Jul 2019

Synthesis of novel C-doped g-C3N4 nanosheets coupled with CdIn2S4 for enhanced photocatalytic hydrogen evolution

  • Jingshuai Chen,
  • Chang-Jie Mao,
  • Helin Niu and
  • Ji-Ming Song

Beilstein J. Nanotechnol. 2019, 10, 912–921, doi:10.3762/bjnano.10.92

Graphical Abstract
  • this, a transient photocurrent response measurement is employed to evaluate the charge migration and separation efficiency of the as-obtained photocatalysts. Transient photocurrents of g-C3N4, CCN and CISCCN3 are studied during the on–off cycles with intermittent exposure of visible-light excitation
  • (Figure 10). Evidently, the as-prepared CCN and CISCCN3 samples display a distinct increase of photocurrent intensity in comparison with single CCN, demonstrating that C-doping as well as the close heterogeneous junction formed between CdIn2S4 and CCN can facilitate the separation of photogenerated
  • electrons and holes, which ultimately endows the CISCCN3 composites with the enhanced photocatalytic performance. This photocurrent result corroborates the results from the UV–vis DRS and PL experiments, as well as the photocatalytic performance. Photocatalytic mechanism Figure 11a displays the specific
PDF
Album
Full Research Paper
Published 18 Apr 2019

Geometrical optimisation of core–shell nanowire arrays for enhanced absorption in thin crystalline silicon heterojunction solar cells

  • Robin Vismara,
  • Olindo Isabella,
  • Andrea Ingenito,
  • Fai Tong Si and
  • Miro Zeman

Beilstein J. Nanotechnol. 2019, 10, 322–331, doi:10.3762/bjnano.10.31

Graphical Abstract
  • solar cell. Implied photocurrent densities close to 27 mAcm−2 are achieved, for a 2 μm thick c-Si absorber coated with nanowires. The enhanced optical performance, with respect to a flat device, is explained by excitation of resonances both inside the nanowires and in the bulk c-Si absorber. In addition
  • , good angular resilience is displayed, with high implied photocurrent density values (i.e., strong absorption) observed for angles of incidence of light up to 60°, making the proposed solar cell architecture attractive in a wide range of illumination conditions. Experimental Device manufacturing and
  • structure were used. Simulation results consists of reflection (R) and absorption (Ai) in each layer (i) of the model, as functions of the wavelength of the incident light. A convolution of the obtained spectral data with the AM1.5 photon flux results in the implied photocurrent density (Jph,i) generated
PDF
Album
Supp Info
Full Research Paper
Published 31 Jan 2019

Uniform Sb2S3 optical coatings by chemical spray method

  • Jako S. Eensalu,
  • Atanas Katerski,
  • Erki Kärber,
  • Ilona Oja Acik,
  • Arvo Mere and
  • Malle Krunks

Beilstein J. Nanotechnol. 2019, 10, 198–210, doi:10.3762/bjnano.10.18

Graphical Abstract
  • ]. Improvements in photocurrent density have been sought by utilizing a transparent, nanostructured window layer instead of planar window layers with the ETA Sb2S3 absorber layer [4][7]. Previous studies show that achieving sufficient repeatability alongside optimization of the component layers, i.e., transparent
PDF
Album
Supp Info
Full Research Paper
Published 15 Jan 2019

Near-infrared light harvesting of upconverting NaYF4:Yb3+/Er3+-based amorphous silicon solar cells investigated by an optical filter

  • Daiming Liu,
  • Qingkang Wang and
  • Qing Wang

Beilstein J. Nanotechnol. 2018, 9, 2788–2793, doi:10.3762/bjnano.9.260

Graphical Abstract
  • -fold to 72-fold improvement of the photocurrent under 980 nm laser light [13]. An enhancement of 10 mA/cm2 in a NaYF4:Yb/Er-based a-Si:H cell was measured under illumination with a 980 nm diode laser (10 mW) [14]. The usage of laser undoubtedly enhances the illumination intensity and thus magnifies the
  • point (0.45 V, 12.45 mA). The inset shows a photograph with the active area of ca. 0.84 cm2. The external quantum efficiency (EQE) curve in Figure 3c reveals that almost no photocurrent is generated when the wavelength of light is longer than 800 nm. The transmittance spectrum of a-Si:H solar cell
  • layer to increase the photocurrent and EQE. Light scattering occurs on an object when its size is comparable to the wavelength of light [18]. Because the nanorods are comparable in size to the incident wavelength, they effectively scatter the upconverted and/or the incoming visible light, as illustrated
PDF
Album
Full Research Paper
Published 31 Oct 2018

Impact of the anodization time on the photocatalytic activity of TiO2 nanotubes

  • Jesús A. Díaz-Real,
  • Geyla C. Dubed-Bandomo,
  • Juan Galindo-de-la-Rosa,
  • Luis G. Arriaga,
  • Janet Ledesma-García and
  • Nicolas Alonso-Vante

Beilstein J. Nanotechnol. 2018, 9, 2628–2643, doi:10.3762/bjnano.9.244

Graphical Abstract
  • annealing conditions. An interesting remark from the literature comes from Hardcastle et al. [53] who observed that anodically grown TNTs after heat treatment between 400 and 500° C showed a 6.5-fold increase in the photocurrent density when the crystalline phase changed in proportion from 72% anatase (400
  • of their specific systems [27][60][61]. A similar approach was used to evaluate the PEC properties of the TNTs. For this purpose, the electrodes were illuminated in a cell with quartz window while performing LSV using the same pretreatment of 10 s polarization. The photocurrent, jph, is then obtained
  • potential when molecular species are present. To evaluate the oxidative contribution of the photogenerated holes, methanol (MeOH) was added to the electrolyte. From Figure 6c it can be seen that the addition of 0.5 M MeOH increases the photocurrent jph up to 200% (Figure 6a). This refers to a phenomenon
PDF
Album
Supp Info
Full Research Paper
Published 04 Oct 2018

Thickness-dependent photoelectrochemical properties of a semitransparent Co3O4 photocathode

  • Malkeshkumar Patel and
  • Joondong Kim

Beilstein J. Nanotechnol. 2018, 9, 2432–2442, doi:10.3762/bjnano.9.228

Graphical Abstract
  • Co3O4 samples, which exhibit light-induced photocurrent in photoelectrochemical cells (PEC) containing the alkaline electrolyte. The thickness-dependent properties of Co3O4 related to its use as a working electrode in PEC cells are extensively studied and show potential for the application in water
  • ]. Existing studies have measured a photocurrent of 33.6 μA·cm−2 in 0.5 M Na2S on a mesoporous Co3O4 nanosheet grown through in situ transformation from hexagonal Co(OH)2 to spinel Co3O4 [18]. Hong et al. demonstrated a photocurrent of 0.4 mA·cm−2 from Co3O4 nanowire photocathodes, which could be enhanced to
  • 4.5 mA·cm−2 with Ag nanowires [24]. Interestingly, a high photocurrent density of 29 mA·cm−2 can be achieved from Co3O4 under one-sun illumination (AM1.5G) suggesting a high (solar-to-hydrogen) efficiency of 35.8% [3]. Studies using Co3O4 as a catalyst have explored the oxygen evolution reaction (OER
PDF
Album
Supp Info
Full Research Paper
Published 12 Sep 2018

Performance analysis of rigorous coupled-wave analysis and its integration in a coupled modeling approach for optical simulation of complete heterojunction silicon solar cells

  • Ziga Lokar,
  • Benjamin Lipovsek,
  • Marko Topic and
  • Janez Krc

Beilstein J. Nanotechnol. 2018, 9, 2315–2329, doi:10.3762/bjnano.9.216

Graphical Abstract
  • transferred into photocurrent. Thus, these are the maximal potential gains related to the given PF variation. As a reference (zero gain) the structure with PF 0.7 was taken. In Figure 7a the reflectance curves are shown for the case of normal incident light. As a reference, the reflectance curve corresponding
PDF
Album
Full Research Paper
Published 28 Aug 2018

Lead-free hybrid perovskites for photovoltaics

  • Oleksandr Stroyuk

Beilstein J. Nanotechnol. 2018, 9, 2209–2235, doi:10.3762/bjnano.9.207

Graphical Abstract
  • typically used as a solvent for the spin-coating deposition of MABI layers [160]. NMP slows the HP crystallization favoring the formation of a more uniform MABI layer and providing a ≈50% enhancement of the photocurrent generation efficiency. Simultaneously, the optimized morphology shows an enhanced
  • characteristic Urbach energy of ≈60 meV, indicating a substantial level of structural and energetic disorder. Due to the disorder, planar inverted solar cells based on amorphous MA3Sb2I9 showed low photocurrent densities, however, with a relatively high open-circuit voltage (≈890 meV) and a decent fill factor
PDF
Album
Review
Published 21 Aug 2018

Spin-coated planar Sb2S3 hybrid solar cells approaching 5% efficiency

  • Pascal Kaienburg,
  • Benjamin Klingebiel and
  • Thomas Kirchartz

Beilstein J. Nanotechnol. 2018, 9, 2114–2124, doi:10.3762/bjnano.9.200

Graphical Abstract
  • infiltration of pores [22], which can give way to incomplete coverage of the TiO2 scaffold and an interface between TiO2 and HTM. From a conceptual perspective, planar geometries reduce the large interface area required in ETA cells for appreciable photocurrent generation and should better prevent direct
  • ][61][62]. Photons that are absorbed by the polymer generate excitons that can only diffuse up to around 10 nm before they recombine. While a photocurrent contribution from the polymer was demonstrated for certain Sb2S3 ETA cells [29] where the interface area is large and close-by, absorption in planar
  • transmitted to the metal back contact where it is reflected back through the P3HT into the Sb2S3 absorber where it contributes to the photocurrent. The decreased parasitic absorption above 650 nm causes a maximum in the EQE at roughly that wavelength. KP115 on the other hand still absorbs at 650 nm so that
PDF
Album
Supp Info
Full Research Paper
Published 08 Aug 2018

Localized photodeposition of catalysts using nanophotonic resonances in silicon photocathodes

  • Evgenia Kontoleta,
  • Sven H. C. Askes,
  • Lai-Hung Lai and
  • Erik C. Garnett

Beilstein J. Nanotechnol. 2018, 9, 2097–2105, doi:10.3762/bjnano.9.198

Graphical Abstract
  • corresponding photocurrent (Figure S4a, Supporting Information File 1), which means that the electrons reaching the electrolyte by biasing the samples dominate over the photogenerated ones. SEM images (Figure S5, Supporting Information File 1) show the homogenous formation of platinum nanoparticles both on the
PDF
Album
Supp Info
Full Research Paper
Published 03 Aug 2018

A scanning probe microscopy study of nanostructured TiO2/poly(3-hexylthiophene) hybrid heterojunctions for photovoltaic applications

  • Laurie Letertre,
  • Roland Roche,
  • Olivier Douhéret,
  • Hailu G. Kassa,
  • Denis Mariolle,
  • Nicolas Chevalier,
  • Łukasz Borowik,
  • Philippe Dumas,
  • Benjamin Grévin,
  • Roberto Lazzaroni and
  • Philippe Leclère

Beilstein J. Nanotechnol. 2018, 9, 2087–2096, doi:10.3762/bjnano.9.197

Graphical Abstract
  • was observed as a result of the accumulation of photogenerated holes in the P3HT layer. A positive photocurrent was recorded in PC-AFM measurements, whose spatial mapping was interpreted consistently with the corresponding KPFM analysis, offering a correlated analysis of interest from both a
  • literature regarding the photovoltaic response of TiO2/P3HT blends [16][17][18][19][20][21][22][23] and can be used as a reference for meaningful interpretations of our measurements, both in terms of photocurrent and photovoltage under illumination. The columnar TiO2/P3HT-COOH HHJs have been studied by
  • photoconductive-AFM (PC-AFM) and photo-assisted Kelvin probe force microscopy (photo-KPFM) to follow the photovoltaic response, i.e., photocurrent and photovoltage, respectively, at the nanoscale under illumination, in order to understand the local physical processes taking place during the photoconversion of
PDF
Album
Supp Info
Full Research Paper
Published 01 Aug 2018
Other Beilstein-Institut Open Science Activities