scholarly journals Influences of p-type layer structure and doping profile on the temperature dependence of the foward voltage characteristic of GaInN light-emitting diode

2015 ◽  
Vol 64 (10) ◽  
pp. 107801
Author(s):  
Mao Qing-Hua ◽  
Liu Jun-Lin ◽  
Quan Zhi-Jue ◽  
Wu Xiao-Ming ◽  
Zhang Meng ◽  
...  
Keyword(s):  
Temperature Dependence ◽  
Layer Structure ◽  
Light Emitting Diode ◽  
Voltage Characteristic ◽  
Doping Profile ◽  
Light Emitting ◽  
Type Layer ◽  
P Type

Dependence of SiC Blue Light-Emitting Diode Efficiency on the p-Type Layer Growth Temperature

1995 ◽  
Vol 34 (Part 1, No. 4A) ◽  
pp. 1833-1834
Author(s):  
Yasuhiko Matsushita ◽  
Takahiro Uetani ◽  
Tatsuya Kunisato ◽  
Junko Suzuki ◽  
Yasuhiro Ueda ◽  
...  
Keyword(s):  
Blue Light ◽  
Growth Temperature ◽  
Light Emitting Diode ◽  
Layer Growth ◽  
Light Emitting ◽  
Type Layer ◽  
P Type

Ultraviolet light-emitting diodes with polarization-doped p-type layer

2016 ◽  
Vol 97 ◽  
pp. 353-357 ◽  
Author(s):  
Wenxiao Hu ◽  
Ping Qin ◽  
Weidong Song ◽  
Chongzhen Zhang ◽  
Rupeng Wang ◽  
...  
Keyword(s):  
Ultraviolet Light ◽  
Light Emitting Diodes ◽  
Light Emitting ◽  
Type Layer ◽  
P Type ◽  
Ultraviolet Light Emitting Diodes

Polymer light-emitting diode with resistivity optimized p-type Si anode

2017 ◽  
pp. 1327-1330
Author(s):  
Qiaoli Niu ◽  
Hengsheng Wu ◽  
Yongtao Gu ◽  
Yanzhao Li ◽  
Wenjin Zeng ◽  
...  
Keyword(s):  
Light Emitting Diode ◽  
Light Emitting ◽  
Si Anode ◽  
Polymer Light Emitting Diode ◽  
P Type

A Monolithic White-Light LED Based on GaN Doped with Be

2014 ◽  
Vol 93 ◽  
pp. 264-269 ◽  
Author(s):  
Henryk Teisseyre ◽  
Michal Bockowski ◽  
Toby David Young ◽  
Szymon Grzanka ◽  
Yaroslav Zhydachevskii ◽  
...  
Keyword(s):  
Gallium Nitride ◽  
White Light ◽  
Light Emission ◽  
Light Emitting Diode ◽  
Yellow Emission ◽  
Bulk Crystals ◽  
Light Emitting ◽  
Type Conductivity ◽  
P Type ◽  
Colour Rendering

In this communication, the use of gallium nitride doped with beryllium as an efficient converter for white light emitting diode is proposed. Until now beryllium in this material was mostly studied as a potential p-type dopant. Unfortunately, the realization of p-type conductivity in such a way seems impossible. However, due to a very intensive yellow emission, bulk crystals doped with beryllium can be used as light converters. In this communication, it is demonstrated that realisation of such diode is possible and realisation of a colour rendering index is close to that necessary for white light emission.

Anomalous Temperature Dependence of Solvent-Enhanced Dye Diffusion In Polymer Films

2002 ◽  
Vol 725 ◽  
Author(s):  
T. Graves-Abe ◽  
F. Pschenitzka ◽  
J.C. Sturm
Keyword(s):  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Temperature Dependence ◽  
Polymer Film ◽  
Light Emitting Diode ◽  
Solvent Vapor ◽  
Light Emitting ◽  
Organic Light Emitting Diode ◽  
Thermally Driven

AbstractOne promising method to pattern full color polymer Organic Light-Emitting Diode (OLED) displays is to print dye from a pre-patterned organic film onto a spin-cast polymer and then diffuse the dye into the film at room temperature in a solvent vapor environment. This method utilizes the well-known tendency for a polymer film to absorb solvent vapor, which depresses the glass transition temperature of the polymer and dramatically increases diffusion the dye. In this work, we have studied the temperature dependence of this process. The dye coumarin 6 (C6) was transferred onto films consisting of 2-(4-biphenylyl)-5-(4-tert-butylphenyl)- 1,3,4-oxadiazole (PBD) mixed with the polymer poly(9-vinylcarbazole) (PVK). Samples were then placed on a heated stage in a chamber and exposed to acetone vapor to diffuse the C6 into the polymer film. The profile of the diffused dye was determined by depthdependent photoluminescence measurements and Secondary Ion Mass Spectroscopy. We observed that the amount of diffused dye decreased at higher temperatures, in contrast to conventional thermally-driven diffusion. The results are understood by noting that the decrease in the polymer glass-transition temperature and the corresponding rapid increase in dye diffusivity depend on the quantity of solvent absorbed by the polymer, which decreases as the temperature of the polymer is raised.

Sign in / Sign up

Export Citation Format

Share Document