Lead-free Cs₂AgBiBr₆ double perovskite is considered a promising alternative photovoltaic absorber to the widely used lead halide perovskite due to its easy processability, high stability, and reduced toxicity. Herein, for the first time spray processing for the deposition of Cs₂AgBiBr₆ double perovskite thin films is reported. Microstructural (X-ray diffraction, scanning electron microscopy) and optoelectronic (absorbance, photoluminescence, photocurrent density versus applied voltage curves, electrochemical impedance spectroscopy) properties of spray-coated film are compared with the spin-coated benchmark. Incorporation of the spray-coated Cs₂AgBiBr₆ double perovskite thin films in solar cells leads to a 2.3% photoconversion efficiency with high open-circuit voltage of 1.09 V. This study highlights the suitability of ultrasonic spray deposition for the optimization of Cs₂AgBiBr₆ solar cells in terms of light absorption properties and charge transfer at the Cs₂AgBiBr₆/hole transporting layer interface.

中文翻译：

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具有高开路电压的喷涂无铅 Cs2AgBiBr6 双钙钛矿太阳能电池

无铅Cs ₂ AgBiBr ₆双钙钛矿因其易于加工、高稳定性和低毒性而被认为是广泛使用的卤化铅钙钛矿的有前途的替代光伏吸收剂。在此，首次报道了用于沉积 Cs ₂ AgBiBr ₆双钙钛矿薄膜的喷涂工艺。将喷涂膜的微观结构（X 射线衍射、扫描电子显微镜）和光电（吸光度、光致发光、光电流密度与施加的电压曲线、电化学阻抗谱）特性与旋涂基准进行比较。加入喷涂的 Cs ₂ AgBiBr ₆太阳能电池中的双钙钛矿薄膜导致 2.3% 的光转换效率和 1.09 V 的高开路电压。该研究强调了超声喷雾沉积在光吸收性能和优化 Cs ₂ AgBiBr ₆太阳能电池方面的适用性Cs ₂ AgBiBr ₆ /空穴传输层界面处的电荷转移。