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- W2043347260 abstract "For the preparation of p-CuGaSe 2 thin film absorbers, powder of single-phase CuGaSe 2 with defined optical and electrical properties is required as precursor material for solar cells. The motivation for this work was that thin films shall be produced by a chemical vapour transport method using iodine as transport agent. Here we report on an optimised synthesis method of this precursor material and discuss the effect of Ag-doping using Ag, AgSe 2 and AgJ as dopants. Crystalline material was characterised by intensity-dependent photoluminescence (PL), X-ray diffraction (XRD) and time resolved microwave conductivity (TRMC). PL-measurements at T = 10 K of undoped CuGaSe 2 show a dominating emission at E = 1.67 eV which is attributed to a free-to-bound transition where the acceptor bound state is assigned to copper vacancies. Ag-doped samples showed a dominating emission at E = 1.61 eV which is attributed to a donor acceptor pair-transition with copper vacancies as acceptors and selenium vacancies as donors. XRD-measurements showed good single-phase quality of CuGaSe 2 , TRMC-measurements reveal an increase of the hole mobility of Ag-doped material compared to undoped CuGaSe 2 ." @default.
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- W2043347260 date "1999-03-01" @default.
- W2043347260 modified "2023-10-17" @default.
- W2043347260 title "Ag-doped CuGaSe2 as a precursor for thin film solar cells" @default.
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- W2043347260 doi "https://doi.org/10.1016/s0022-0248(98)01152-x" @default.
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