Emission Pattern Control of GaN-Based Light-Emitting Diodes with ZnO Nanostructures

2011 ◽  
Vol 4 (11) ◽  
pp. 112101 ◽  
Author(s):  
Young-Seok Lee ◽  
Yong-Il Jung ◽  
Bum-Young Noh ◽  
Il-Kyu Park
Keyword(s):  
Light Emitting Diodes ◽  
Zno Nanostructures ◽  
Emission Pattern ◽  
Light Emitting ◽  
Pattern Control

scholarly journals Emission pattern control and polarized light emission through patterned graded-refractive-index coatings on GaInN light-emitting diodes

2012 ◽  
Vol 20 (15) ◽  
pp. 16677 ◽  
Author(s):  
Ming Ma ◽  
Ahmed N. Noemaun ◽  
Jaehee Cho ◽  
E. Fred Schubert ◽  
Gi Bum Kim ◽  
...  
Keyword(s):  
Refractive Index ◽  
Light Emitting Diodes ◽  
Light Emission ◽  
Polarized Light ◽  
Emission Pattern ◽  
Light Emitting ◽  
Pattern Control

Zinc Oxide and Copper Oxide Nanostructures: Fundamentals and Applications

2012 ◽  
Vol 1406 ◽  
Author(s):  
Magnus Willander ◽  
Omer Nur ◽  
Gul Amin ◽  
A. Zainelabdin ◽  
S. Zaman
Keyword(s):  
Zinc Oxide ◽  
Copper Oxide ◽  
Light Emitting Diodes ◽  
Zno Nanorods ◽  
Superior Performance ◽  
Zno Nanostructures ◽  
Large Area ◽  
Light Emitting ◽  
Sensing Applications ◽  
Quality Material

ABSTRACTCopper oxide (CuO) and zinc oxide (ZnO) nanostructures complement each other since CuO is unintentional p-type and ZnO unintentional n-type. Using the low temperature chemical growth approach, the effect on morphology of varying the pH of the grown ZnO nanostructures and CuO micro structures is monitored. For both materials the variation of the pH was found to lead to a large variation on the morphology achieved. The grown ZnO NRs and CuO micro flowers material were used to fabricate devices. We demonstrate results from ZnO nanorods (NRs)/polymer p-n hybrid heterojunctions chemically grown on paper and using a process on paper for light emitting diodes (LEDs) applications as well as some large area light emitting diodes LEDs. The growth of CuO micro flowers indicated good quality material for sensing applications. The grown CuO micro flowers were employed as pH sensors. The results indicated a superior performance as expect due to the catalytic properties of this material.

scholarly journals Nanostructural Effect of ZnO on Light Extraction Efficiency of Near-Ultraviolet Light-Emitting Diodes

2016 ◽  
Vol 2016 ◽  
pp. 1-6 ◽  
Author(s):  
Young Jae Park ◽  
Hyounsuk Song ◽  
Kang Bok Ko ◽  
Beo Deul Ryu ◽  
Tran Viet Cuong ◽  
...  
Keyword(s):  
Ultraviolet Light ◽  
Indium Tin Oxide ◽  
Light Emitting Diodes ◽  
Light Output ◽  
Light Extraction Efficiency ◽  
Zno Nanostructures ◽  
Light Emitting ◽  
Near Ultraviolet ◽  
Output Efficiency ◽  
Ultraviolet Light Emitting Diodes

The effect of ZnO nanostructures on the light output power of 375 nm near-ultraviolet light-emitting diodes (NUV-LEDs) was investigated by comparing one-dimensional (1D) nanorods (NR-ZnO) with two-dimensional (2D) nanosheets (NS-ZnO). ZnO nanostructures were grown on a planar indium tin oxide (ITO) by solution based method at low temperature of 90°C without degradation of the forward voltage. At an injection current of 100 mA, the light output efficiency of NUV-LED with NR-ZnO was enhanced by around 30% compared to the conventional NUV-LEDs without ZnO nanostructures. This improvement is due to the formation of a surface texturing, resulting in a larger escape cone and a multiple scattering for the photons in the NUV-LED, whereas the light output efficiency of NUV-LED with NS-ZnO was lower than that of the conventional NUV-LEDs due to the internal reflection and light absorption in the defective sites of NS-ZnO.

Improvement of the Light Extraction Efficiency of InGaN/GaN Blue Light Emitting Diodes Using ZnO Nanostructures

2015 ◽  
Vol 15 (7) ◽  
pp. 5215-5219 ◽  
Author(s):  
Jong-Hyun Jeon ◽  
Pan-Ju Choi ◽  
Seung Jong Oh ◽  
Young-Jin Kang ◽  
Ja-Yeon Kim ◽  
...  
Keyword(s):  
Blue Light ◽  
Light Emitting Diodes ◽  
Extraction Efficiency ◽  
Light Extraction ◽  
Light Extraction Efficiency ◽  
Zno Nanostructures ◽  
Light Emitting
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