Affiliation:
1. Hefei National Research Center for Physical Sciences at the Microscale CAS Key Laboratory of Materials for Energy Conversion Department of Materials Science and Engineering School of Chemistry and Materials Science University of Science and Technology of China Hefei 230026 China
2. Institute of Deep Space Sciences Deep Space Exploration Laboratory Hefei 230088 China
Abstract
AbstractAgSbS2‐xSex is a promising light‐harvesting material for thin film solar cells, characterized by nontoxicity, high chemical stability, and excellent optoelectronic properties. However, the complex chemical composition of AgSbS2‐xSex poses significant challenges to thin film preparation, giving rise to an intensive dependence on multi‐step preparation methods. Herein, a hydrothermal method is developed for depositing AgSbS2‐xSex films and achieves one‐step preparation of this kind of thin film materials for the first time. This method can provide sufficient energy for atomic nucleation and adsorption on the substrate surface to promote nuclei aggregation and grow into films. Meanwhile, it achieves control of the chemical kinetics of the deposition solution by introducing EDTA‐2Na as an additive and suppressing the enrichment of Ag2Se impurities at the substrate interface. As a result, a high‐purity AgSbS2‐xSex film with compact and flat morphology is prepared and assembled into solar cells. The device delivers a power conversion efficiency of 3.04% under standard illumination, which is currently the highest efficiency for AgSbS2‐xSex solar cells fabricated by the one‐step method. This study provides a facile and promising method for the controllable preparation of high‐quality AgSbS2‐xSex thin films and promoting their application in solar cells.
Funder
National Natural Science Foundation of China
National Key Research and Development Program of China
CAS Center for Excellence in Particle Physics