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Local current transport and surface potential of photovoltaic Cu(In, Ga)Se-2 thin films probed by multi-scale imaging methods

Title
Local current transport and surface potential of photovoltaic Cu(In, Ga)Se-2 thin films probed by multi-scale imaging methods
Authors
Jeong, AR[Jeong, A. R.]Kim, GY[Kim, G. Y.]Jo, W[Jo, W.]Nam, DH[Nam, D. H.]Cheong, H[Cheong, H.]Jo, HJ[Jo, H. J.]Kim, DH[Kim, D-H]Sung, SJ[Sung, S. J.]Kang, JK[Kang, J. K.]Lee, DH[Lee, D. H.]
DGIST Authors
Jo, HJ[Jo, H. J.]; Kim, DH[Kim, D-H]Kang, JK[Kang, J. K.]; Lee, DH[Lee, D. H.]
Issue Date
2013-03
Citation
Advances in Natural Sciences: Nanoscience and Nanotechnology, 4(1)
Type
Article
Article Type
Article
Keywords
Atomic ForceCu(In, Ga)Se2Solar CellsSurface Current and PotentialThin-Films
ISSN
2043-6254
Abstract
Microstructural alteration induces non-uniform device characteristics in polycrystalline thin films. In thin-film solar cells based on Cu(In Ga)Se2 (CIGS), local electrical properties are investigated by Raman scattering spectroscopic imaging and scanning probe microscopic tools. Localized and uneven intensity of phonon modes, which represent different orientation and phases, elucidate the nature of non-uniformity of crystallinity, composition and defects in the films. Surface potential mapping at nanoscale is performed by Kelvin probe force microscopy, showing ~40mV of band-bending at the grain boundaries. Externally biased-current mapping, which is obtained by conductive atomic force microscopy, shows preferred current path in the films. © 2013 Vietnam Academy of Science & Technology.
URI
http://hdl.handle.net/20.500.11750/3257
DOI
10.1088/2043-6262/4/1/015007
Publisher
Institute of Physics Publishing
Related Researcher
Files:
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Collection:
Energy Science and EngineeringOrganic & Printed Electronics Laboratory(OPEL)1. Journal Articles


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