Light extraction technologies for high-efficiency GaInN-LED devices

2003 ◽  
Author(s):  
Volker Haerle ◽  
Berthold Hahn ◽  
Stephan Kaiser ◽  
Andreas Weimar ◽  
Dominik Eisert ◽  
...  
Keyword(s):  
High Efficiency ◽  
Light Extraction

Light-extraction mechanisms in high-efficiency surface-textured light-emitting diodes

2002 ◽  
Vol 8 (2) ◽  
pp. 248-255 ◽  
Author(s):  
R. Windisch ◽  
C. Rooman ◽  
B. Dutta ◽  
A. Knobloch ◽  
G. Borghs ◽  
...  
Keyword(s):  
High Efficiency ◽  
Light Emitting Diodes ◽  
Light Extraction ◽  
Light Emitting ◽  
Extraction Mechanisms

scholarly journals Enhancing the Light-Extraction Efficiency of AlGaN-Based Deep-Ultraviolet Light-Emitting Diodes by Optimizing the Diameter and Tilt of the Aluminum Sidewall

Crystals ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 420 ◽  
Author(s):  
Yung-Min Pai ◽  
Chih-Hao Lin ◽  
Chun-Fu Lee ◽  
Chun-Peng Lin ◽  
Cheng-Huan Chen ◽  
...  
Keyword(s):  
Ultraviolet Light ◽  
High Efficiency ◽  
Light Emitting Diodes ◽  
Extraction Efficiency ◽  
Light Extraction ◽  
Light Extraction Efficiency ◽  
Light Power ◽  
Light Emitting ◽  
Deep Ultraviolet ◽  
Ultraviolet Light Emitting Diodes

To realize high-efficiency AlGaN-based deep-ultraviolet light-emitting diodes (DUV-LEDs), enhancing their light-extraction efficiency (LEE) is crucial. This paper proposes an aluminum-based sidewall reflector structure that could replace the conventional ceramic-based packaging method. We design optimization simulations and experimental results demonstrated the light power output could be enhanced 18.38% of DUV-LEDs packaged with the aluminum-based sidewall.

Nano-modified indium tin oxide incorporated with ideal microlens array for light extraction of OLED

2019 ◽  
Vol 7 (13) ◽  
pp. 3958-3964 ◽  
Author(s):  
Jun-Gui Zhou ◽  
Xiao-Chen Hua ◽  
Yang-Kai Chen ◽  
Yu-Yang Ma ◽  
Chen-Chao Huang ◽  
...  
Keyword(s):  
Tin Oxide ◽  
Indium Tin Oxide ◽  
High Efficiency ◽  
Microlens Array ◽  
Light Extraction ◽  
Microlens Arrays

Nano-modified ITO anode with low haze incorporated with ideal microlens arrays is achieved for high-efficiency OLED.

Enhanced light extraction efficiency via double nano-pattern arrays for high-efficiency deep UV LEDs

2021 ◽  
Vol 143 ◽  
pp. 107360
Author(s):  
Zhihua Zheng ◽  
Qian Chen ◽  
Jiangnan Dai ◽  
Ange Wang ◽  
Renli Liang ◽  
...  
Keyword(s):  
High Efficiency ◽  
Extraction Efficiency ◽  
Light Extraction ◽  
Light Extraction Efficiency ◽  
Deep Uv ◽  
Uv Leds

Microcalorimeters for X-Ray Spectroscopy

1988 ◽  
Vol 102 ◽  
pp. 41
Author(s):  
E. Silver ◽  
C. Hailey ◽  
S. Labov ◽  
N. Madden ◽  
D. Landis ◽  
...  
Keyword(s):  
High Resolution ◽  
High Efficiency ◽  
Thermal Response ◽  
Low Noise ◽  
High Resolution Spectroscopy ◽  
Superconducting Transition ◽  
Sapphire Substrates ◽  
Laboratory Plasmas ◽  
Adiabatic Demagnetization ◽  
Theoretical Predictions

The merits of microcalorimetry below 1°K for high resolution spectroscopy has become widely recognized on theoretical grounds. By combining the high efficiency, broadband spectral sensitivity of traditional photoelectric detectors with the high resolution capabilities characteristic of dispersive spectrometers, the microcalorimeter could potentially revolutionize spectroscopic measurements of astrophysical and laboratory plasmas. In actuality, however, the performance of prototype instruments has fallen short of theoretical predictions and practical detectors are still unavailable for use as laboratory and space-based instruments. These issues are currently being addressed by the new collaborative initiative between LLNL, LBL, U.C.I., U.C.B., and U.C.D.. Microcalorimeters of various types are being developed and tested at temperatures of 1.4, 0.3, and 0.1°K. These include monolithic devices made from NTD Germanium and composite configurations using sapphire substrates with temperature sensors fabricated from NTD Germanium, evaporative films of Germanium-Gold alloy, or material with superconducting transition edges. A new approache to low noise pulse counting electronics has been developed that allows the ultimate speed of the device to be determined solely by the detector thermal response and geometry. Our laboratory studies of the thermal and resistive properties of these and other candidate materials should enable us to characterize the pulse shape and subsequently predict the ultimate performance. We are building a compact adiabatic demagnetization refrigerator for conveniently reaching 0.1°K in the laboratory and for use in future satellite-borne missions. A description of this instrument together with results from our most recent experiments will be presented.

Sign in / Sign up

Export Citation Format

Share Document