Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6534739 | Solar Energy Materials and Solar Cells | 2016 | 6 Pages |
Abstract
CeO2 and hydrogen co-doped In2O3 (ICO:H) films deposited by ion plating with dc arc-discharge were used as a transparent conducting oxide (TCO) electrode in hydrogenated amorphous silicon (a-Si:H)/crystalline silicon (c-Si) heterojunction (SHJ) solar cells. Incorporating ICO:H instead of conventional Sn-doped In2O3 (ITO) films and hydrogenated In2O3 (IO:H) films, improved the fill factor (FF) and short-circuit current density (Jsc) simultaneously. The best SHJ cell (243.4Â cm2) containing ICO:H films had a conversion efficiency of 24.1%, open-circuit voltage of 745Â mV, Jsc of 38.8Â mA/cm2, and FF of 83.2% because of their high Hall mobility of 140Â cm2/VÂ s. We have clarified the following design principles for ICO:H films: (i) the Ce species substituted for In atoms acts as a donor and (ii) CeO2 and H decrease the residual strain and the contribution of the grain boundary scattering to carrier transport. This co-doping method can produce high conversion efficiencies in all solar cells containing TCO with resistive emitters.
Keywords
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Physical Sciences and Engineering
Chemical Engineering
Catalysis
Authors
Eiji Kobayashi, Yoshimi Watabe, Tetsuya Yamamoto, Yoichi Yamada,