Analysis of CMOS hot carrier light sources using back-end-of-line light directing structures for improved light extraction efficiency

2014 ◽  
Author(s):  
Anthony F. Bulling ◽  
Petrus J. Venter ◽  
Monuko du Plessis
Keyword(s):  
Extraction Efficiency ◽  
Light Extraction ◽  
Light Extraction Efficiency ◽  
Light Sources ◽  
Hot Carrier

scholarly journals Optimized Aluminum Reflector for Enhancement of UVC Cathodoluminescence Based-AlGaN Materials with Carbon Nanotube Field Emitters

Molecules ◽  
2021 ◽  
Vol 26 (13) ◽  
pp. 4025
Author(s):  
Manoj Kumar Chandra Mohan ◽  
Sang Kyun Shim ◽  
June Key Lee ◽  
Nakwon Jang ◽  
Naesung Lee ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Power Efficiency ◽  
Extraction Efficiency ◽  
Light Output ◽  
Light Extraction ◽  
Light Extraction Efficiency ◽  
Light Sources ◽  
Field Emitters ◽  
Ultraviolet C ◽  
Far Ultraviolet

The far ultraviolet C (UVC) light sources based on carbon nanotube (CNT) field emitters as excitation sources have become promising light sources for sterilization, disinfection, and water purification. However, the low light extraction efficiency of UVC–CNT light sources still hinders the practical application of these structures. Herein, we report an optimized aluminum (Al) reflector to enhance the light extraction efficiency of UVC–CNT light sources. Optical analysis of UVC-CNT light sources covered by the Al reflectors with various thicknesses ranging from 30 to 150 nm was performed to realize the optimized reflector. The UVC-CNT light sources exhibit the highest light extraction efficiency when the Al reflector layer has an optimized thickness of 100 nm. For comparison, the cathodoluminescence (CL) spectra were recorded for UVC–CNT light sources with and without the optimized Al reflector. The measured light output power and the estimated power efficiency of the UVC–CNT light-source-tube with Al reflector were enhanced by about 27 times over the reference. This enhancement is mainly attributed to the outstanding reflection effect of the Al reflector.

ZnO Nano-arrays on High Power Blue LED Chip for Enhanced Light Extraction Efficiency

2012 ◽  
Vol 27 (7) ◽  
pp. 716-720
Author(s):  
Bing XU ◽  
Jun-Liang ZHAO ◽  
Jian-Ming ZHANG ◽  
Xiao-Wei SUN ◽  
Fu-Wei ZHUGE ◽  
...  
Keyword(s):  
High Power ◽  
Extraction Efficiency ◽  
Light Extraction ◽  
Light Extraction Efficiency ◽  
Blue Led

Light extraction efficiency enhancement of CH3NH3PbBr3 light-emitting diodes using nanopatterned PEDOT:PSS layers

2021 ◽  
Vol 119 (23) ◽  
pp. 233302
Author(s):  
Shukun Weng ◽  
Min Sun ◽  
Liping Zhang ◽  
Lubing Jiang ◽  
Chao Shi ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Extraction Efficiency ◽  
Light Extraction ◽  
Light Extraction Efficiency ◽  
Efficiency Enhancement ◽  
Light Emitting

scholarly journals Holographic Fabrication and Optical Property of Graded Photonic Super-Crystals with a Rectangular Unit Super-Cell

Photonics ◽  
2018 ◽  
Vol 5 (4) ◽  
pp. 34 ◽  
Author(s):  
Safaa Hassan ◽  
Oliver Sale ◽  
David Lowell ◽  
Noah Hurley ◽  
Yuankun Lin
Keyword(s):  
Extraction Efficiency ◽  
Light Extraction ◽  
Light Extraction Efficiency ◽  
Interference Lithography ◽  
Light Modulator ◽  
Light Emitting ◽  
Polarization Effects ◽  
Organic Light ◽  
Super Cell ◽  
Phase Engineering

Recently developed graded photonic super-crystals show an enhanced light absorption and light extraction efficiency if they are integrated with a solar cell and an organic light emitting device, respectively. In this paper, we present the holographic fabrication of a graded photonic super-crystal with a rectangular unit super-cell. The spatial light modulator-based pixel-by-pixel phase engineering of the incident laser beam provides a high resolution phase pattern for interference lithography. This also provides a flexible design for the graded photonic super-crystals with a different ratio of length over the width of the rectangular unit super-cell. The light extraction efficiency is simulated for the organic light emitting device, where the cathode is patterned with the graded photonic super-crystal. The high extraction efficiency is maintained for different exposure thresholds during the interference lithography. The desired polarization effects are observed for certain exposure thresholds. The extraction efficiency reaches as high as 75% in the glass substrate.

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