Piezoelectric field in InGaN-based quantum wells grown on c-plane sapphire substrates measured by electroreflectance spectroscopy: from near-ultraviolet to green spectra
- Title
- Piezoelectric field in InGaN-based quantum wells grown on c-plane sapphire substrates measured by electroreflectance spectroscopy: from near-ultraviolet to green spectra
- Author
- 신동수
- Issue Date
- 2020-03
- Publisher
- IOP PUBLISHING LTD
- Citation
- JAPANESE JOURNAL OF APPLIED PHYSICS, v. 59, no. 3, Article no. 038001, 3pp
- Abstract
- The internal electric field caused by the strain-induced piezoelectric polarization in InGaN-based single- or multiple-quantum-well light-emitting diodes (LEDs) is measured by using electroreflectance spectroscopy. The piezoelectric fields (FPZ’s) in InGaN LEDs from near-ultraviolet to green spectra (In-compositions of ∼3% to ∼30%) are measured to understand the effect of In-composition on FPZ. A second-order polynomial as a function of In-composition is proposed from these FPZ values as a guideline for future research. The experimental trend has a good agreement with the theoretical prediction for low (<15%) In-compositions. However, the trend diverges from the theoretical prediction at high In-compositions due to defect incorporation into the lattice. The observed effects of epitaxial structures and point defects on FPZ are systematically explained.
- URI
- https://iopscience.iop.org/article/10.35848/1347-4065/ab7356https://repository.hanyang.ac.kr/handle/20.500.11754/163096
- ISSN
- 1347-4065; 0021-4922
- DOI
- 10.35848/1347-4065/ab7356
- Appears in Collections:
- COLLEGE OF SCIENCE AND CONVERGENCE TECHNOLOGY[E](과학기술융합대학) > PHOTONICS AND NANOELECTRONICS(나노광전자학과) > Articles
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