3D structural construction of GaN-based light-emitting diode by confocal micro-Raman spectroscopy

Heng Li; Chiao-Yun Chang; Hui-Yu Cheng; Wei-Liang Chen; Yi-Hsin Huang; Tien-Chang Lu; Yu-Ming Chang

doi:10.1117/12.2208856

8 March 2016 3D structural construction of GaN-based light-emitting diode by confocal micro-Raman spectroscopy

Heng Li, Chiao-Yun Chang, Hui-Yu Cheng, Wei-Liang Chen, Yi-Hsin Huang, Tien-Chang Lu, Yu-Ming Chang

Proceedings Volume 9768, Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XX; 976813 (2016) https://doi.org/10.1117/12.2208856
Event: SPIE OPTO, 2016, San Francisco, California, United States

Abstract

The key issue for light emission strength of GaN-based LEDs is the high defect density and strain in MQWs causing the electric polarization fields. In this work, we construct 3D confocal microspectroscopy to clarify strain distribution and the relationship between photoluminescence (PL) intensity and pattern sapphire substrate (PSS). From 3D construction of E₂^high Raman and PL mapping, the dislocation in MQW can be traced to the cone tip of PSS and the difference in E₂^high Raman mapping between substrate and surface is also measured. The ability to measure strain change in 3D structure nondestructively can be applied to explore many structural problems of GaN-based optoelectronic devices.

Citation Download Citation

Heng Li, Chiao-Yun Chang, Hui-Yu Cheng, Wei-Liang Chen, Yi-Hsin Huang, Tien-Chang Lu, and Yu-Ming Chang "3D structural construction of GaN-based light-emitting diode by confocal micro-Raman spectroscopy", Proc. SPIE 9768, Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XX, 976813 (8 March 2016); https://doi.org/10.1117/12.2208856

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available