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Electroreflectance study of CuIn1-xGaxSe2 thin film solar cells

Title
Electroreflectance study of CuIn1-xGaxSe2 thin film solar cells
Authors
Jo, Hyun-JunJeon, Dong-HwanKo, Byoung SooSung, Shi-JoonHwang, Dae-KueKang, Jin-KyuKim, Dae-Hwan
DGIST Authors
Sung, Shi-Joon; Hwang, Dae-KueKang, Jin-KyuKim, Dae-Hwan
Issue Date
2014-03
Citation
Current Applied Physics, 14(3), 318-321
Type
Article
Article Type
Article
Keywords
Applied Bias VoltageCadmium SulfideCdSCIGSElectric FieldsElectric ResistanceElectroreflectanceFranz-Keldysh OscillationsGalliumHigh Energy RegionsInternal Electric FieldsSemiconducting Selenium CompoundsSemiconductor Quantum WellsSolar CellsThin-Film Solar CellsThin-Films
ISSN
1567-1739
Abstract
We have investigated the optical properties of CuIn1-xGa xSe2 (CIGS) thin film solar cells using their electroreflectance (ER) at room temperature. The ER spectra exhibited one broad and two narrow signal regions. Using the photoluminescence (PL) and photocurrent (PC) spectra, the peaks in the low-energy region (1.02-1.35 eV) can be assigned to the CIGS thin film. The PC results implied that the peaks in the high-energy region (2.10-2.52 eV) can be assigned to the CdS band-gap energy. Using the applied bias voltage, the broad signals in the 1.35-2.09 eV region can be assigned to the Franz-Keldysh oscillation (FKO) due to the internal electric field. The ER spectra exhibited a distorted CdS signal for the CIGS thin film solar cell with low shunt resistance and efficiency. © 2013 Published by Elsevier B.V.
URI
http://hdl.handle.net/20.500.11750/5265
DOI
10.1016/j.cap.2013.12.016
Publisher
Elsevier B.V.
Related Researcher
Files:
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Collection:
Convergence Research Center for Solar Energy1. Journal Articles


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