【摘要】 本文中我们首次在低温（<100°C）SnO₂溶胶-凝胶中通过掺杂Nb⁵⁺调控SnO₂电学性质,使SnO₂与混合离子钙钛矿之间形成更匹配的能级.掺杂Nb⁵⁺后SnO₂电子传输层导电率明显提升,导带位置下移更加接近混合离子钙钛矿导带,有效促进了电子由SnO₂向钙钛矿层的注入,并加速了电子传输过程,二者的共同作用使非辐射复合几率降低,器件效率由18.06%提升至19.38%. Nb⁵⁺掺杂SnO₂为低温（<100°C）制备高效率钙钛矿太阳能电池提供了有效参考途径,有望进一步推动钙钛矿太阳能电池的产业化进程.更多还原

【Abstract】 Herein, we for the first time doped Nb⁵⁺into the low-temperature（<100°C） SnO₂sol-gel route to tailor the electrical property of SnO₂ layers and the band alignment between SnO₂ and the normally used mixed perovskites. The results revealed that proper Nb⁵⁺doping increased the conductivity of the SnO₂ electron transport layer（ETL）, and the conduction band（CB） level of the SnO₂ ETL was shifted down to approach the CB level of perovskites, which facilitated the electron injection from perovskite to SnO₂, accelerated the charge transport, and reduced the non-radiative recombination, leading to improved power conversion efficiency from18.06% to 19.38%. The Nb⁵⁺doping process provided an efficient route for fabricating high-efficiency perovskite solar cells（PSCs） at a temperature lower than 100°C, and promoted the commercialization progress of PSCs.更多还原