Temperature dependence of the photovoltage from Franz-Keldysh oscillations in a GaAs p(+)-i-n(+) structure
- Title
- Temperature dependence of the photovoltage from Franz-Keldysh oscillations in a GaAs p(+)-i-n(+) structure
- Author(s)
- 김종수; 이상조; 손창원; 조현준; 한임식; 노삼규[노삼규]; 최현광[최현광]; 임재영[임재영]
- Keywords
- PHOTOREFLECTANCE SPECTROSCOPY; MODULATION; SURFACE
- Issue Date
- 201509
- Publisher
- KOREAN PHYSICAL SOC
- Citation
- JOURNAL OF THE KOREAN PHYSICAL SOCIETY, v.67, no.5, pp.916 - 920
- Abstract
- The temperature dependences of the junction electric fields and photovoltage have been investigated for a GaAs p(+)-i-n(+) structure by using photoreflectance (PR) spectroscopy. The electric field strength was examined through three types of Franz-Keldysh oscillation (FKO) analyses; then, the photovoltage was evaluated with respect to temperature in the range from 30 to 300 K. From the PR results, we observed two electric fields that are estimated to originate from two regions of FKOs in undoped GaAs and from the space charge region in highly-doped GaAs. The electric field under illumination decreased with decreasing temperature while the photovoltage obtained from the electric field increased. We also demonstrate that PR spectroscopy is a good method for investigating the photovoltaic effect in solar-cell structures.
- URI
- http://hdl.handle.net/YU.REPOSITORY/31084http://dx.doi.org/10.3938/jkps.67.916
- ISSN
- 0374-4884
- Appears in Collections:
- 이과대학 > 물리학과 > Articles
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