Improving measurement techniques of thin film solar cells

New, innovative solar cell technologies such as CZTS, CdTe, and hybrid perovskite solar cells are constantly being pursued in order to deliver better cost per Watt performance. Moreover, cost and long term reliability(25 years or more) are important factors that are currently considered. The Scarpulla group has identified that measuring impedance of Thin Film solar cells(i.e. CZTS, CdTe, Hybrid Perovskite, and others) in the bandwidth 1 MHz to 1 GHz will yield new insights into their device physics. The scope of this paper is to introduce the design and testing of an integrated system for measuring RF impedance of a CdTe cell at room temperatures. The success of testing will then be forwarded to testing at variable temperatures from 80K to 300 K in order to make an equivalent circuit model from these unique measurements.