【摘要】 聚3,4-亚乙基二氧噻吩/聚苯乙烯磺酸具有良好的透光性和柔韧性以及较好的热稳定性,是反式钙钛矿太阳能电池常用的空穴传输材料,但聚3,4-亚乙基二氧噻吩/聚苯乙烯磺酸的酸性和吸湿性不可避免地会影响钙钛矿太阳能电池的长期稳定性,其能级与钙钛矿材料能级的不完全匹配会造成钙钛矿太阳能电池的开路电压较低.本文应用水热法合成的p型铜铁矿CuCrO₂纳米颗粒作为反式结构[（FA PbI₃）_0.87（MAPbBr₃）_0.13]_0.92（CsPbI₃）_0.08基底钙钛矿太阳能电池的空穴传输材料.结果表明,反式结构钙钛矿太阳能电池的开路电压以聚3,4-亚乙基二氧噻吩/聚苯乙烯磺酸为空穴传输材料时的908 mV提升至以CuCrO₂为空穴传输材料时的1020 mV.紫外光电子能谱测试表明CuCrO₂与钙钛矿材料之间的能级匹配优于聚3,4-亚乙基二氧噻吩/聚苯乙烯磺酸与钙钛矿之间的能级匹配,电化学阻抗谱表明基于CuCrO₂的钙钛矿太阳能电池具有更大的复合电阻和更长的载流子寿命,这都有利于钙钛矿太阳能电池开路电压的提升.更多还原

【Abstract】 Poly（3,4-ethylenedioxythiophene）:poly（styrenesulfonate）（PEDOT:PSS）has been widely adopted as hole transport material（HTM） in inverted perovskite solar cells（PSCs）, due to high optical transparency, good mechanical flexibility, and high thermal stability; however, its acidity and hygroscopicity inevitably hamper the long-term stability of the PSCs and its energy level does not match well with perovskite materials with a relatively low open-circuit voltage. In this work, p-type delafossite CuCrO₂ nanoparticles synthesized through hydrothermal method was employed as an alternative HTM for triple cation perovskite [（FAPbI₃）_0.87（MAPbBr₃）_0.13]_0.92（CsPbI₃）_0.08（possessing better photovoltaic performance and stability than conventional CH₃NH₃PbI₃） based inverted PSCs. The average open-circuit voltage of PSCs increases from 908 mV of the devices with PEDOT:PSS HTM to 1020 m V of the devices with CuCrO₂ HTM. Ultraviolet photoemission spectroscopy demonstrates the energy band alignment between CuCrO₂ and perovskite is better than that between PEDOT:PSS and perovskite, the electrochemical impedance spectroscopy indicates CuCrO₂ -based PSCs exhibit larger recombination resistance and longer charge carrier lifetime than PEDOT:PSS-based PSCs, which contributes to the high VOCof CuCrO₂ HTM-based PSCs.更多还原