Selenization of Nanoparticle Precursor Layers for Cu(In,Ga)Se2 Absorbers
| Autor: | Uhl, A.R., Wallerand, A., Koller, M., Fella, C.M., Romanyuk, Y.E., Tiwari, A.N., Magorian-Friedlmeier, T.M., Ahlswede, E., VanGenechten, D., Stassin, F. |
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| Jazyk: | angličtina |
| Rok vydání: | 2012 |
| Předmět: | |
| DOI: | 10.4229/27theupvsec2012-3cv.1.36 |
| Popis: | 27th European Photovoltaic Solar Energy Conference and Exhibition; 2318-2320 In the framework of the industry-led project NOVA-CIGS, supported by the EU within the FP7 program, we investigate an alternative, non-vacuum deposition process for Cu(In,Ga)Se2 (CIGS) absorber layers based on the conversion of hydroxide-based nanoparticle layers. By means of knife-coating and drying of stabilized nanoparticle dispersions, precursor layers are fabricated and subsequently converted to CIGS material with elemental selenium vapors. Process-related optimization of the drying and conversion step resulted in efficiencies of up to 5% without the use of an additional reducing step. Systematic investigation of the drying and selenization conditions of monometallic dispersions by means of XRF, SEM, EDX, and ex-situ XRD showed the occurrence of binary selenide phases with various metal-toselenide ratios. By employing an intermediate holding temperature in the selenization process for mixed metal precursors, we suggest that certain binary phases of copper can be promoted that improve the conversion process in terms of grain growth and sintering. |
| Databáze: | OpenAIRE |
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