Manipulating the Electrical Properties of Sb2(S,Se)3 Film for High‐Efficiency Solar Cell

Sb2(S,Se)3 is identified as a promising light‐harvesting material due to its excellent light‐harvesting capability, abundant elemental storage, and excellent stability. Here a hydrothermal method is demonstrated for the direct deposition of Sb2(S,Se)3 film, in which it is found that ethylenediaminetetraacetic acid (EDTA) as a strong coordination additive is able to control the nucleation and deposition process for obtaining high‐quality Sb2(S,Se)3 films. With that, a milestone performance of 10.5% efficiency is achieved. This efficiency achievement indicates the great potential of Sb2(S,Se)3 as an alternative next‐generation solar cell material. Hydrothermal deposition under the assistance of ethylenediaminetetraacetic acid (EDTA) leads to a Sb2(S,Se)3 film with enhanced grain size and electrical conductivity. Solar cells with this absorber film overcome the power conversion efficiency barrier and reach 10.5%.