SCHEDULED MAINTENANCE
l-Cysteine assisted-synthesis of 3D In2S3 for 3D CuInS2 and its application in hybrid solar cells
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Abstract
In this paper, the L-cysteine assisted-synthesis of 3D In2S3 for 3D CuInS2 with a walnut-shape structure was reported and the 3D CuInS2 was applied in hybrid solar cells (HPSCs) for the first time. In the first step, 3D In2S3 was synthesized via a solvothermal method, with L-cysteine as the sulphur source, forming uniform flowerlike hierarchical structures. In the second step, chalcopyrite 3D CuInS2 with a walnut-shape hierarchical structure was produced, using 3D In2S3 as the template and with the corporation of Cu2+. Correlated factors in the reaction, such as the molar quantity of L-cysteine and the solvent, were adjusted to study the formation process of 3D CuInS2. 3D CuInS2 displayed a wide absorption range in UV-vis spectra and quenched the fluorescence of poly(2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylene vinylene) (MEH–PPV) effectively; therefore, it was applied to the fabrication of MEH–PPV/3D CuInS2 solar cells, with a mixture of polymer and 3D CuInS2 as the photoactive layer, for the first time, obtaining a PCE of 0.4% and confirming that 3D CuInS2 could be applied in HPSCs successfully.
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