Optimization and performance of nitrogen-doped carbon dots as a color conversion layer for white-LED applications

• Tugrul Guner,
• Hurriyet Yuce,
• Didem Tascioglu,
• Eren Simsek,
• Umut Savaci,
• Aziz Genc,
• Servet Turan and
• Mustafa M. Demir

Beilstein J. Nanotechnol. 2019, 10, 2004–2013, doi:10.3762/bjnano.10.197

• to inorganic phosphors that are commonly employed in white-LED configurations. Keywords: color conversion layer; electrospinning; nitrogen-doped carbon dots; PVP; solid-state lighting; white LED; white-light generation; Introduction Light-emitting carbon dots (CDots) are a new class of

• configuration is the combination of a color conversion layer composed of yellow phosphors (e.g., cerium-doped yttrium aluminum garnet (YAG:Ce3+)) with a blue LED chip [33][34][35][36][37]. However, this configuration exhibits a low color rendering index (CRI) due to its red deficiency. Therefore, red phosphors

• , Hillsboro, OR, USA). Lastly, CRI, CCT, luminous flux and LER were calculated using the OSRAM ColorCalculator program. The quantum yield was obtained by using a fluorometer (Horiba Scientific Fluorolog) with a quanta-φ integrating sphere. We use remote-phosphor configuration, which color conversion layer(s

Green fabrication of lanthanide-doped hydroxide-based phosphors: Y(OH)₃:Eu³⁺ nanoparticles for white light generation

• Tugrul Guner,
• Anilcan Kus,
• Mehmet Ozcan,
• Aziz Genc,
• Hasan Sahin and
• Mustafa M. Demir

Beilstein J. Nanotechnol. 2019, 10, 1200–1210, doi:10.3762/bjnano.10.119

• conversion layer. Some portion of the blue light is absorbed by the phosphor and yellow emission is produced. Meanwhile, the remaining portion of the blue light escapes from this layer. The combination of the escaped blue light and the produced yellow emission from the phosphor from the conversion layer

• conversion layer Red-emitting Y(OH)3:Eu3+ sub-micrometer phosphors were integrated into a YAG-based white LED configuration, and the resulting optical features were investigated. Among the varying doping ratios, Y(OH)3:20% Eu3+ fabricated at 60 min was selected as a model material since the results from

• , cerium-doped yttrium aluminum garnet (YAG:Ce3+) is a well-known yellow phosphor that is employed in an LED package together with a blue LED to create a white light LED (WLED) [14][15][16][17][18][19]. In such a case, the blue light emitted from the blue LED impinges on the phosphor-containing color