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Barium acetate as an additive for high performance perovskite solar cells†
Journal of Materials Chemistry C ( IF 5.7 ) Pub Date : 2019-09-02 , DOI: 10.1039/c9tc04067f Yueming Wang 1, 2, 3, 4, 5 , Yulei Wu 5, 6, 7, 8 , Sheng Fu 5, 6, 7, 8 , Changjian Song 5, 6, 7, 8 , Li Wan 5, 6, 7, 8 , Wenxiao Zhang 5, 6, 7, 8 , Xiaodong Li 5, 6, 7, 8 , Weiguang Yang 1, 2, 3, 4, 5 , Weijie Song 5, 6, 7, 8 , Junfeng Fang 5, 6, 7, 8, 9
Journal of Materials Chemistry C ( IF 5.7 ) Pub Date : 2019-09-02 , DOI: 10.1039/c9tc04067f Yueming Wang 1, 2, 3, 4, 5 , Yulei Wu 5, 6, 7, 8 , Sheng Fu 5, 6, 7, 8 , Changjian Song 5, 6, 7, 8 , Li Wan 5, 6, 7, 8 , Wenxiao Zhang 5, 6, 7, 8 , Xiaodong Li 5, 6, 7, 8 , Weiguang Yang 1, 2, 3, 4, 5 , Weijie Song 5, 6, 7, 8 , Junfeng Fang 5, 6, 7, 8, 9
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Defects within the halide perovskite films limit the efficiency and stability of perovskite solar cells (PSCs). Here, barium acetate (BaAc2) is employed as an additive in MAPbI3 for high performance PSCs. The BaAc2 can control the crystallization and thus produce high-quality perovskite films, which is attributed to interaction between the acetate ions and perovskite precursor. Both low defect density and the movement of energy levels contribute to a significant increase in open circuit voltage (Voc). Consequently, an efficiency up to 19.82% with a high Voc of 1.13 V is obtained based on the optimized BaAc2 concentration device. Moreover, the compact perovskite crystal with suppression of ion migration endows the BaAc2 doped PSCs with obviously enhanced thermal stability. The device with BaAc2 additive maintained over 90% of its original power conversion efficiency (PCE) after thermal aging at 90 °C for 400 hours.
中文翻译：
乙酸钡作为高性能钙钛矿太阳能电池的添加剂†
卤化物钙钛矿薄膜内的缺陷限制了钙钛矿太阳能电池（PSC）的效率和稳定性。在此，乙酸钡（BaAc 2）被用作MAPbI 3中的添加剂，用于高性能PSC。BaAc 2可以控制结晶并因此产生高质量的钙钛矿薄膜，这归因于乙酸根离子和钙钛矿前体之间的相互作用。低缺陷密度和能级的移动都导致开路电压（V oc）的显着增加。因此，基于优化的BaAc 2，在1.13 V的高V oc下可获得高达19.82％的效率浓缩装置。此外，具有抑制离子迁移的致密钙钛矿晶体使掺杂BaAc 2的PSC具有明显增强的热稳定性。在90°C的温度下老化400小时后，带有BaAc 2添加剂的器件可保持其原始功率转换效率（PCE）的90％以上。
更新日期：2019-09-26
中文翻译：
乙酸钡作为高性能钙钛矿太阳能电池的添加剂†
卤化物钙钛矿薄膜内的缺陷限制了钙钛矿太阳能电池（PSC）的效率和稳定性。在此，乙酸钡（BaAc 2）被用作MAPbI 3中的添加剂，用于高性能PSC。BaAc 2可以控制结晶并因此产生高质量的钙钛矿薄膜，这归因于乙酸根离子和钙钛矿前体之间的相互作用。低缺陷密度和能级的移动都导致开路电压（V oc）的显着增加。因此，基于优化的BaAc 2，在1.13 V的高V oc下可获得高达19.82％的效率浓缩装置。此外，具有抑制离子迁移的致密钙钛矿晶体使掺杂BaAc 2的PSC具有明显增强的热稳定性。在90°C的温度下老化400小时后，带有BaAc 2添加剂的器件可保持其原始功率转换效率（PCE）的90％以上。
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