Bismuth Incorporation Stabilized α-CsPbI3 for Fully Inorganic Perovskite Solar Cells,ACS Energy Letters

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Bismuth Incorporation Stabilized α-CsPbI3 for Fully Inorganic Perovskite Solar Cells
ACS Energy Letters ( IF 19.3 ) Pub Date : 2017-09-05 00:00:00 , DOI: 10.1021/acsenergylett.7b00508
Yanqiang Hu ₁ , Fan Bai ₁ , Xinbang Liu ₂ , Qingmin Ji ₂ , Xiaoliang Miao ₁ , Ting Qiu ₁ , Shufang Zhang ₁

Affiliation

All-inorganic CsPbI₃ perovskite is emerging to be an alternative light-harvesting material in solar cells owing to the enhanced stability and comparable photovoltaic performance compared to organic–inorganic hybrid perovskites. However, the desirable black phase α-CsPbI₃ is not stable at room temperature and degrades rapidly to a nonperovskite yellow phase δ-CsPbI₃. Herein, we introduce a compositional engineering approach via incorporating Bi³⁺ in CsPbI₃ to stabilize the α-phase at room temperature. Fully inorganic solar cells based on the Bi-incorporated α-CsPb_1–xBi_xI₃ compounds demonstrate a high PCE of 13.21% at an optimal condition (incorporation of 4 mol % Bi³⁺) and maintain 68% of the initial PCE for 168 h under ambient conditions without encapsulation. This is the first attempt of partial substitution of the “B”-site of the perovskite to stabilize the α-CsPbI₃, which paves the way for further developments of such perovskites and other optoelectronic devices.

中文翻译：

铋掺入稳定α-CsPbI ₃为完全无机钙钛矿的太阳能电池

与有机-无机杂化钙钛矿相比，由于具有更高的稳定性和可比的光伏性能，全无机CsPbI ₃钙钛矿正在成为太阳能电池中的另一种集光材料。然而，理想的黑色相α-CsPbI ₃是在室温下不与降解迅速稳定到nonperovskite黄色相位δ-CsPbI ₃。在本文中，我们介绍了通过在CsPbI _3中掺入Bi ³⁺来稳定室温下的α相的组成工程方法。基于所述双并入α-CSPB充分的无机太阳能电池_1-_X的Bi _X我₃这些化合物在最佳条件下（掺入4 mol％Bi ³⁺）表现出13.21％的高PCE，并且在室温下无需封装即可在168小时内保持68％的初始PCE。这是在“B” -site钙钛矿的部分取代的第一次尝试，以稳定α-CsPbI ₃，其铺平了这种钙钛矿和其他光电器件的进一步发展的方法。

更新日期：2017-09-06

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