AgBiS₂ nanocrystals are good candidates in optoelectronic applications due to their solution-processability, earth abundance and non-toxic properties. AgBiS₂ thin film solar cells have demonstrated promising performance due to their high absorption coefficients and suitable bandgaps for light harvesting. However, their physical properties such as mobility, carrier concentration and photosensitivity, which are very important for photovoltaics, remain unreported. Herein, we develop an improved amine-based synthesis route and systematically investigate these properties by characterizing field effect transistors and photodetectors fabricated from AgBiS₂ nanocrystals. We found that the amine-based synthesis improved their measurable semiconducting properties and their solar cell performance. The optimal thickness of a champion solar cell was found to increase to 65 nm, which achieved a power conversion efficiency of 4.3% based on a ZnO/AgBiS₂/P3HT/Au device structure, compared with 35 nm of a champion solar cell with a power conversion efficiency of 3.9% reported previously. This modified approach could be applied in the preparation of other high quality nanocrystals that uses silver, where single valence Ag cations are of increasing importance in stable solution processed nanomaterials.

中文翻译：

---

通过改进的基于胺的合成路线获得的 AgBiS ₂纳米晶体中增强的光电性能†

AgBiS ₂纳米晶体因其溶液加工性，地球丰度和无毒特性而成为光电应用的良好候选者。AgBiS ₂薄膜太阳能电池因其高吸收系数和适合光收集的带隙而表现出令人鼓舞的性能。但是，它们的物理性质（如迁移率，载流子浓度和光敏性）对于光伏来说非常重要，至今尚未报道。本文中，我们开发了一种改进的基于胺的合成路线，并通过表征由AgBiS ₂制成的场效应晶体管和光电探测器来系统地研究这些性质。纳米晶体。我们发现基于胺的合成改善了其可测量的半导体性能和太阳能电池性能。发现冠军型太阳能电池的最佳厚度增加到65 nm，基于ZnO / AgBiS ₂ / P3HT / Au器件结构，其功率转换效率为4.3％，而相比之下，冠军型太阳能电池的最佳厚度为35 nm。先前报道的功率转换效率为3.9％。这种改进的方法可以应用于制备其他使用银的高质量纳米晶体，其中单价Ag阳离子在稳定的溶液加工纳米材料中正变得越来越重要。