Using pre-TMIn treatment to improve the optical properties of green light emitting diodes

Using pre-TMIn treatment to improve the optical properties of green light emitting diodes

We investigated the effects of pre-TMIn treatment on the optical properties of green light emitting diodes (LEDs). Although pre-TMIn treatment did not affect the epitaxial structure of quantum wells, it significantly improved the quality of the surface morphology relative to that of the untreated sa...

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Bibliographic Details
Main Authors: Xu, Bing, Dai, Hai Tao, Wang, Shu Guo, Chu, Fu-Chuan, Huang, Chou-Hsiung, Yu, Sheng-Fu, Zhao, Jun Liang, Sun, Xiao Wei, Lin, Ray-Ming
Other Authors: School of Electrical and Electronic Engineering
Format: Article
Language:English
Published: 2014
Subjects:
DRNTU::Science::Physics::Optics and light
Online Access:https://hdl.handle.net/10356/104861
http://hdl.handle.net/10220/20330
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Institution: Nanyang Technological University
Language: English
Description
Summary:We investigated the effects of pre-TMIn treatment on the optical properties of green light emitting diodes (LEDs). Although pre-TMIn treatment did not affect the epitaxial structure of quantum wells, it significantly improved the quality of the surface morphology relative to that of the untreated sample. Indium cluster can be seen by high-resolution transmission electron microscopy (HR-TEM), which is the explanation for the red-shift of photoluminescence (PL). Time-resolved photoluminescence measurements indicated that the sample prepared with pre-TMIn treatment had a shorter radiative decay time. As a result, the light output power of the treated green LED was higher than that of the conventional untreated one. Thus, pre-TMIn treatment appears to be a simple and efficient means of improving the performance of green LEDs.

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