TAILIEUCHUNG - Solar Cells Thin Film Technologies Part 12

Tham khảo tài liệu 'solar cells thin film technologies part 12', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 15 Analysis of CZTSSe Monograin Layer Solar Cells Gregor Cernivec Andri Jagomagi and Koen Decock 1University of Ljubljana Faculty of Electrical Engineering 2Department of Mate-rials Science Tallinn University of Technology 3Solar Cells Department Ghent University - ELIS 1Slovenia 2Estonia 3Belgium 1. Introduction Monograin layer MGL solar cell combines the features of a monocrystalline solar cell and a thin film solar cell. The photoactive layer is formed from the kesterite-stannite semiconductor Cu2SnZn S Se 4 CZTSSe material with the single-crystalline grains embedded into the epoxy resin Altosaar et al. 2003 . With the graphite back contact cadmium sulphide CdS buffer layer and zinc oxide ZnO Al i-ZnO window layer the remainder of the structure resembles a thin film CIS solar cell in the superstrate configuration Fig. 1 . Fig. 1. The MGL solar cell. The photoactive Cu2SnZnSe4 monograins are covered with CdS and embedded into the epoxy resin. The thin layer of the intrinsic ZnO serves as the CdS surface passivation and as the barrier for the ZnO Al impurities. The front contact comprises indium fingers while the back contact is made of the graphite paste. 320 Solar Cells - Thin-Film Technologies The main advantage of this cell over the thin film CIGS solar cell are the low production costs - using a relatively simple powder technology Altosaar et al. 2005 and the replacement of the expensive indium In by the less expensive tin Sn and zinc Zn metals. The photovoltaic properties of this new structure are very promising the spectrum conversion efficiency reaches up to along with the open-circuit voltage Voc up to 660 mV and the fill-factor FF up to 65 . The short-circuit current Jsc has its maximal value at the room temperature and then decreases with the lowering temperature. Along with the low FF these output parameters point to some specific charge transport properties. In order to discover the origin of the charge transport limiting mechanism we .

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