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dc.contributor.author Jeong, A.R. -
dc.contributor.author Jo, W. -
dc.contributor.author Jo, H.J. -
dc.contributor.author Kim, D.-H. -
dc.contributor.author Sung, S.J. -
dc.contributor.author Kang, J.K. -
dc.contributor.author Lee, D.H. -
dc.contributor.author Nam, D.H. -
dc.contributor.author Park, D.Y. -
dc.contributor.author Cheong, H. -
dc.date.available 2017-07-11T08:07:41Z -
dc.date.created 2017-05-08 -
dc.date.issued 2011 -
dc.identifier.isbn 9780000000000 -
dc.identifier.uri http://hdl.handle.net/20.500.11750/3923 -
dc.description.abstract Understanding of grain boundary (GB) is critical for photovoltaic applications since electron-hole recombination at GBs determines the conversion efficiency. However, our local electrical and optical analysis shows positive potential at GBs in Cu(In,Ga)Se 2 (CIGS), which suppresses the recombination at GBs. We report on a direct measurement of potential distribution and local electrical transport on the surface of photovoltaic CIGS using a nano-scale electrical characterization of Kelvin probe microscopy and conductive atomic force microscopy. This reveals that the positively charged surface potential at GB is expected to increase the minority carrier collection and the enhanced current at GB leads to large carrier mobility and electron-hole separation at the GBs. Micro-Raman scattering results helps to analyze electrical behavior from defect analysis. © 2011 IEEE. -
dc.publisher Institute of Electrical and Electronics Engineers Inc. -
dc.relation.ispartof 2011 IEEE Nanotechnology Materials and Devices Conference, NMDC 2011 -
dc.title Nano-scale observation of charge transport and potential distribution of photovoltaic Cu(In,Ga)Se 2 thin-films -
dc.type Conference Paper -
dc.identifier.doi 10.1109/NMDC.2011.6155335 -
dc.identifier.scopusid 2-s2.0-84860452493 -
dc.identifier.bibliographicCitation 2011 IEEE Nanotechnology Materials and Devices Conference, NMDC 2011, pp.184 - 185 -
dc.citation.conferenceDate 2011-10-18 -
dc.citation.conferencePlace US -
dc.citation.conferencePlace Jeju -
dc.citation.endPage 185 -
dc.citation.startPage 184 -
dc.citation.title 2011 IEEE Nanotechnology Materials and Devices Conference, NMDC 2011 -
dc.type.docType Conference Paper -
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Division of Energy Technology 2. Conference Papers

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