Regensburg 2013 – scientific programme

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DS: Fachverband Dünne Schichten

DS 32: Poster Session IV: Atomic layer deposition; Organic thin films; Organic Electronics and Phototovoltaics; Organic Materials for Spintronics - from spinterface to devices; Thin film photovoltaic materials and solar cells

DS 32.63: Poster

Thursday, March 14, 2013, 17:00–20:00, Poster B2

Time-Resolved Photoluminescence Studies on Cu(In,Ga)Se2 Thin Film Solar Cells — •Viktor Gerliz, Dimitrios Anastassiou, Jörg Ohland, Dirk Otteken, Ingo Riedel, and Jürgen Parisi — Carl von Ossietzky Universität Oldenburg

The aim of this study is to evaluate the qualification of time-resolved photoluminescence (TR-PL) measurements as tool for quality management for inline production of Cu(In,Ga)Se2 thin film modules. Prior to the interpretation of TR-PL measurements regarding device-characteristic quality parameters, the first stage of the study addresses the technical requirements for reliable data acquisition via time-correlated single photon counting. We observed that decay curves taken at low-injection (LI) levels generally exhibit mono-exponential decay characteristics, while high injection (HI) causes superposition with a slower relaxation process. Short measurement times are required for industry applications of this technique. These can only be achieved at sufficiently high excitation intensity (HI). Under such conditions we observe a correspondence between open circuit voltage and the second order decay constant.