We report on a simple one-step solution processing strategy to fabricate new stable mixed cation/mixed halide (5-AVA)_xMA_1−xPbI_3−y(BF₄)_y perovskite solar cells. The results showed that the power conversion efficiency (PCE) of the optimized mixed (5-AVA)_0.034MA_0.966PbI_2.95(BF₄)_0.05 perovskite solar cells was substantially increased to 15.5% with a remarkably high V_OC of 0.97 V. We have analyzed different mixed perovskites focusing on the characterization of the charge recombination by means of intensity-modulated photovoltage spectroscopy. In addition, our study discloses that the incorporation of MABF₄ into the (5-AVA)_0.034MA_0.966PbI₃ perovskite helps to reduce the charge recombination in the mixed perovskite cells, thus improving the open circuit voltage of the device. Furthermore, the new mixed perovskite was demonstrated to produce high-quality perovskite crystals and enhance the conductivity of the mixed perovskite.

中文翻译：

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混合（5-AVA）_x MA _{1- x} PbI _{3- y}（BF ₄）_y钙钛矿增强了无孔导体可印刷介观太阳能电池的光伏性能†

我们报告了一种简单的一步解决方案处理策略，以制造新的稳定的混合阳离子/混合卤化物（5-AVA）_x MA _{1- x} PbI _{3- y}（BF ₄）_y钙钛矿太阳能电池。结果表明，优化的混合（5-AVA）_0.034 MA _0.966 PbI _2.95（BF ₄）_0.05钙钛矿型太阳能电池的功率转换效率（PCE）显着提高至15.5％，而V _OC却非常高为0.97V。我们分析了不同的混合钙钛矿，重点研究了通过强度调制光电压光谱对电荷复合的表征。此外，我们的研究表明，将MABF ₄掺入（5-AVA）_0.034 MA _0.966 PbI ₃钙钛矿中有助于减少混合钙钛矿电池中的电荷重组，从而改善器件的开路电压。此外，新型混合钙钛矿被证明可以生产高质量的钙钛矿晶体，并提高混合钙钛矿的电导率。