High optical power and low-efficiency droop blue light-emitting diodes using compositionally step-graded InGaN barrier

Chih Chien Pan; Qimin Yan; Houqiang Fu; Yuji Zhao; Yuh Renn Wu; Chris Van De Walle; Shuji Nakamura; Steven P. Denbaars

doi:10.1049/el.2015.1647

High optical power and low-efficiency droop blue light-emitting diodes using compositionally step-graded InGaN barrier

Chih Chien Pan
, Qimin Yan
, Houqiang Fu
, Yuji Zhao
, Yuh Renn Wu
, Chris Van De Walle
, Shuji Nakamura
, Steven P. Denbaars

Research output: Contribution to journal › Article › peer-review

21 Scopus citations

Abstract

A compositionally step-graded (CSG) InGaN barrier is designed for the active region of c-plane blue light-emitting diodes (LEDs). High external quantum efficiencies of 45, 42, 39 and 36% are achieved at current densities of 100, 200, 300 and 400 A/cm², respectively. Compared with GaN barrier devices, LEDs with CSG InGaN barriers showed higher power, lower operating voltage and smaller wavelength blueshift, compared with GaN barrier LEDs. Owing to the low-voltage performance, higher wall-plug efficiency can be achieved for blue LEDs with CSG InGaN barriers.

Original language	English (US)
Pages (from-to)	1187-1189
Number of pages	3
Journal	Electronics Letters
Volume	51
Issue number	15
DOIs	https://doi.org/10.1049/el.2015.1647
State	Published - Jul 23 2015

ASJC Scopus subject areas

Electrical and Electronic Engineering

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10.1049/el.2015.1647

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@article{a78120e295d54b759cc6f7b0ff62e431,

title = "High optical power and low-efficiency droop blue light-emitting diodes using compositionally step-graded InGaN barrier",

abstract = "A compositionally step-graded (CSG) InGaN barrier is designed for the active region of c-plane blue light-emitting diodes (LEDs). High external quantum efficiencies of 45, 42, 39 and 36\% are achieved at current densities of 100, 200, 300 and 400 A/cm2, respectively. Compared with GaN barrier devices, LEDs with CSG InGaN barriers showed higher power, lower operating voltage and smaller wavelength blueshift, compared with GaN barrier LEDs. Owing to the low-voltage performance, higher wall-plug efficiency can be achieved for blue LEDs with CSG InGaN barriers.",

author = "Pan, \{Chih Chien\} and Qimin Yan and Houqiang Fu and Yuji Zhao and Wu, \{Yuh Renn\} and \{Van De Walle\}, Chris and Shuji Nakamura and Denbaars, \{Steven P.\}",

note = "Publisher Copyright: {\textcopyright} The Institution of Engineering and Technology 2015.",

year = "2015",

month = jul,

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doi = "10.1049/el.2015.1647",

language = "English (US)",

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T1 - High optical power and low-efficiency droop blue light-emitting diodes using compositionally step-graded InGaN barrier

AU - Pan, Chih Chien

AU - Yan, Qimin

AU - Fu, Houqiang

AU - Zhao, Yuji

AU - Wu, Yuh Renn

AU - Van De Walle, Chris

AU - Nakamura, Shuji

AU - Denbaars, Steven P.

PY - 2015/7/23

Y1 - 2015/7/23

N2 - A compositionally step-graded (CSG) InGaN barrier is designed for the active region of c-plane blue light-emitting diodes (LEDs). High external quantum efficiencies of 45, 42, 39 and 36% are achieved at current densities of 100, 200, 300 and 400 A/cm2, respectively. Compared with GaN barrier devices, LEDs with CSG InGaN barriers showed higher power, lower operating voltage and smaller wavelength blueshift, compared with GaN barrier LEDs. Owing to the low-voltage performance, higher wall-plug efficiency can be achieved for blue LEDs with CSG InGaN barriers.

AB - A compositionally step-graded (CSG) InGaN barrier is designed for the active region of c-plane blue light-emitting diodes (LEDs). High external quantum efficiencies of 45, 42, 39 and 36% are achieved at current densities of 100, 200, 300 and 400 A/cm2, respectively. Compared with GaN barrier devices, LEDs with CSG InGaN barriers showed higher power, lower operating voltage and smaller wavelength blueshift, compared with GaN barrier LEDs. Owing to the low-voltage performance, higher wall-plug efficiency can be achieved for blue LEDs with CSG InGaN barriers.

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JO - Electronics Letters

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High optical power and low-efficiency droop blue light-emitting diodes using compositionally step-graded InGaN barrier

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