Toward smart and ultra‐efficient solid‐state lighting

JY Tsao, MH Crawford, ME Coltrin… - Advanced Optical …, 2014 - Wiley Online Library
Solid‐state lighting has made tremendous progress this past decade, with the potential to
make much more progress over the coming decade. In this article, the current status of solid …

Comparison between blue lasers and light‐emitting diodes for future solid‐state lighting

JJ Wierer Jr, JY Tsao, DS Sizov - Laser & Photonics Reviews, 2013 - Wiley Online Library
Solid‐state lighting (SSL) is now the most efficient source of high color quality white light
ever created. Nevertheless, the blue InGaN light‐emitting diodes (LEDs) that are the light …

Carrier recombination mechanisms and efficiency droop in GaInN/GaN light-emitting diodes

Q Dai, Q Shan, J Wang, S Chhajed, J Cho… - Applied Physics …, 2010 - pubs.aip.org
We model the carrier recombination mechanisms in GaInN/GaN light-emitting diodes as R=
A n+ B n 2+ C n 3+ f (n)⁠, where f (n) represents carrier leakage out of the active region. The …

Effective suppression of efficiency droop in GaN-based light-emitting diodes: role of significant reduction of carrier density and built-in field

YS Yoo, JH Na, SJ Son, YH Cho - Scientific reports, 2016 - nature.com
A critical issue in GaN-based high power light-emitting diodes (LEDs) is how to suppress the
efficiency droop problem occurred at high current injection while improving overall quantum …

On the effect of step-doped quantum barriers in InGaN/GaN light emitting diodes

ZH Zhang, ST Tan, Z Ju, W Liu, Y Ji… - Journal of Display …, 2012 - ieeexplore.ieee.org
InGaN/GaN light-emitting diodes (LEDs) make an important class of optoelectronic devices,
increasingly used in lighting and displays. Conventional InGaN/GaN LEDs of c-orientation …

Efficiency enhancement of blue InGaN/GaN light-emitting diodes with an AlGaN-GaN-AlGaN electron blocking layer

CS Xia, ZM Li, W Lu, ZH Zhang, Y Sheng… - Journal of Applied …, 2012 - pubs.aip.org
Blue InGaN/GaN multiple quantum well light-emitting diodes (LEDs) with the conventional
AlGaN and AlGaN-GaN-AlGaN (AGA) electron blocking layer (EBL) are investigated …

InGaN/InGaN multiple-quantum-well grown on InGaN/GaN semi-bulk buffer for blue to cyan emission with improved optical emission and efficiency droop

S Alam, S Sundaram, M Elouneg-Jamroz, X Li… - Superlattices and …, 2017 - Elsevier
Abstract In 0.16 Ga 0.84 N/In 0.05 Ga 0.95 N Multiple Quantum Well (MQW) structure grown
on a 70 nm thick high quality semi-bulk InGaN buffer layer is reported. Temperature …

Effect of electron leakage on efficiency droop in wide-well InGaN-based light-emitting diodes

LB Chang, MJ Lai, RM Lin, CH Huang - Applied physics express, 2011 - iopscience.iop.org
Efficiency droop in wide-well InGaN double-heterostructure light-emitting diodes (LEDs) has
been investigated by inserting an extra InGaN quantum well into the p-type side as the …

Solid‐state lighting: toward smart and ultraefficient materials, devices, lamps, and systems

MH Crawford, JJ Wierer, AJ Fischer… - Photonics: Photonics …, 2015 - Wiley Online Library
This chapter provides a brief history of solid‐state lighting (SSL): key materials and device
breakthroughs; the state‐of‐the‐art device and lamp architectures that those breakthroughs …

Correlative high‐resolution mapping of strain and charge density in a strained piezoelectric multilayer

K Song, CT Koch, JK Lee, DY Kim… - Advanced Materials …, 2015 - Wiley Online Library
A key to strain engineering of piezoelectric semiconductor devices is the quantitative
assessment of the strain‐charge relationship. This is particularly demanding in current …