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2015•Applied Physics ExpressRequires access

Improvement of the open-circuit voltage of Cu2ZnSnS4solar cells using a two-layer structure

Shin Tajima, Tadayoshi Itoh, Hirofumi Hazama, Keiichiro Oh‐ishi, Ryoji Asahi

Open publisher page 77 citations

Abstract

In Cu 2 ZnSnS 4 (CZTS) photovoltaic cells, a low open-circuit voltage ( V OC ) principally causes low conversion efficiency. We investigated the deposition of a CZTS layer by a two-layer process to improve the V OC of the CZTS cells. In this process, the first CZTS layers near a Mo electrode have a high Cu content and the second layer near the surface has a low Cu content. The two-layer process improved the V OC of the CZTS cells from 0.66 to 0.78 V. Finally, the best CZTS cell showed a conversion efficiency of 8.8%.

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What this paper is about

In Cu 2 ZnSnS 4 (CZTS) photovoltaic cells, a low open-circuit voltage ( V OC ) principally causes low conversion efficiency. We investigated the deposition of a CZTS layer by a two-layer process to improve the V OC of the CZTS cells. In this process, the first CZTS layers near a Mo electrode have a high Cu content and the second layer near the surface has a low Cu content. The two-layer process improved the V OC of the CZTS cells from 0.66 to 0.78 V. Finally, the best CZTS cell showed a conversion efficiency of 8.8%.

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OpenAlex reports 77 citations for this work. Citation counts describe recorded attention and do not establish research quality.

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Available abstract

In Cu 2 ZnSnS 4 (CZTS) photovoltaic cells, a low open-circuit voltage ( V OC ) principally causes low conversion efficiency. We investigated the deposition of a CZTS layer by a two-layer process to improve the V OC of the CZTS cells. In this process, the first CZTS layers near a Mo electrode have a high Cu content and the second layer near the surface has a low Cu content. The two-layer process improved the V OC of the CZTS cells from 0.66 to 0.78 V. Finally, the best CZTS cell showed a conversion efficiency of 8.8%.

Key concepts: CZTS, Open-circuit voltage, Layer (electronics), Materials science, Energy conversion efficiency, Photovoltaic system, Electrode, Optoelectronics

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