Fan Erchuang, Liu Manying, Yang Kangni, Jiang Siyu, Li Bingxin, Zhao Dandan, Guo Yanru, Zhang Yange, Zhang Peng, Zuo Chuantian, Ding Liming, Zheng Zhi
Key Laboratory of Micro-Nano Materials for Energy Storage and Conversion of Henan Province, College of Chemical and Materials Engineering, Institute of Surface Micro and Nano Materials, Xuchang University, Xuchang, 461000, People's Republic of China.
School of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450001, People's Republic of China.
Nanomicro Lett. 2023 Mar 2;15(1):58. doi: 10.1007/s40820-023-01033-5.
Lead-free inorganic copper-silver-bismuth-halide materials have attracted more and more attention due to their environmental friendliness, high element abundance, and low cost. Here, we developed a strategy of one-step gas-solid-phase diffusion-induced reaction to fabricate a series of bandgap-tunable CuAgBiI/CuI bilayer films due to the atomic diffusion effect for the first time. By designing and regulating the sputtered Cu/Ag/Bi metal film thickness, the bandgap of CuAgBiI could be reduced from 2.06 to 1.78 eV. Solar cells with the structure of FTO/TiO/CuAgBiI/CuI/carbon were constructed, yielding a champion power conversion efficiency of 2.76%, which is the highest reported for this class of materials owing to the bandgap reduction and the peculiar bilayer structure. The current work provides a practical path for developing the next generation of efficient, stable, and environmentally friendly photovoltaic materials.
无铅无机铜-银-铋卤化物材料因其环境友好、元素丰度高和成本低而受到越来越多的关注。在此，我们首次开发了一种一步气-固相传扩散诱导反应策略，由于原子扩散效应制备了一系列带隙可调的CuAgBiI/CuI双层薄膜。通过设计和调节溅射的Cu/Ag/Bi金属膜厚度，CuAgBiI的带隙可从2.06 eV降低至1.78 eV。构建了具有FTO/TiO/CuAgBiI/CuI/碳结构的太阳能电池，获得了2.76%的最佳功率转换效率，由于带隙减小和独特的双层结构，这是此类材料报道的最高效率。当前的工作为开发下一代高效、稳定且环境友好的光伏材料提供了一条切实可行的途径。
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