Efficient In2S3 Quantum dot−sensitized Solar Cells: A Promising Power Conversion Efficiency of 1.30%

•In2S3 quantum dots are adsorbed on TiO2 by a repeated deposition technique.•The In2S3 loading and electron density on CB of TiO2 are elevated.•A promising power conversion efficiency of 1.30% is recorded in QDSSC.

As a branch of dye − sensitized solar cell, quantum dot − sensitized solar cells (QDSSCs) have attracted growing interests because of promisingly theoretical electron density on conduction band of TiO2 nanocrystallite. Here we report the synthesis of efficient In2S3 sensitized solar cells. The adsorption cycles are repeated to optimize In2S3 loading and therefore photovoltaic performances. A promising power conversion efficiency of 1.30% (under AM 1.5G) is recorded at 24 cycles of In2S3 adsorption. The relatively high conversion efficiency in combination with simple preparation demonstrates the potential use of In2S3 quantum dots in QDSSCs.

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