TY - GEN A1 - Wilks, Regan G. A1 - Repins, Ingrid A1 - Contreras, M. A. A1 - Duarte, Roberto Felix A1 - Herrero-Albillos, J. A1 - Tati-Bismaths, L. A1 - Kronast, F. A1 - Noufi, R. A1 - Bär, Marcus T1 - Intergrain variations of the chemical and electronic surface structure of polycrystalline Cu(In,Ga)Se2 thin-film solar cell absorbers T2 - Applied Physics Letters N2 - The μm-scale spatial distribution of the elements of polycrystalline Cu(In1− x Ga x )Se2 absorber surfaces is examined using x-ray photoelectron emission microscopy. The chemical composition varies from grain to grain, and a direct, linear anticorrelation between the In 3d and Ga 2p photoemission line intensities is observed. The line intensities are interpreted in terms of a varying value of x= Ga/(In+ Ga); the band gaps calculated from the inferred compositions of the grains are shown to be normally distributed with a standard deviation of 40 meV. Y1 - 2012 SN - 0003-6951 VL - 101 IS - 10 SP - 103908-1 EP - 103908-4 ER - TY - CHAP A1 - Repins, Ingrid A1 - Mansfield, Lorelle M. A1 - Kanevce, Ana A1 - Jensen, Soren A. A1 - Kuciauskas, Darius A1 - Glynn, Stephen A1 - Barnes, Teresa A1 - Metzger, Wyatt A1 - Burst, James A1 - Jiang, Chun-Sheng A1 - Harvey, Steve A1 - Dippo, Patricia A1 - Teeter, Glenn A1 - Perkins, C. A1 - Egaas, Brian A1 - Zakutayev, Andriy A1 - Alsmeier, Jan Hendrik A1 - Lußky, Thomas A1 - Korte, Lars A1 - Wilks, Regan G. A1 - Bär, Marcus A1 - Yan, Yanfa A1 - Lany, Stephan A1 - Zawadzki, Pawel A1 - Zawadzki, Pawel A1 - Park, Ji-Sang A1 - Wei, Suhuai T1 - Wild band edges: The role of bandgap grading and band-edge fluctuations in high-efficiency chalcogenide devices T2 - 2016 IEEE 43rd Photovoltaic Specialists Conference (PVSC), Portland, OR, USA, June 5-10, 2016 Y1 - 2016 SN - 978-1-5090-2724-8 SP - 309 EP - 314 PB - IEEE CY - Piscataway, NJ ER -