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Strontium-Doped Low-Temperature-Processed CsPbI2Br Perovskite Solar Cells
ACS Energy Letters ( IF 19.3 ) Pub Date : 2017-09-13 00:00:00 , DOI: 10.1021/acsenergylett.7b00751
Cho Fai Jonathan Lau 1 , Meng Zhang 1 , Xiaofan Deng 1 , Jianghui Zheng 1 , Jueming Bing 1 , Qingshan Ma 1 , Jincheol Kim 1 , Long Hu 1 , Martin A. Green 1 , Shujuan Huang 1 , Anita Ho-Baillie 1
Affiliation  

Cesium (Cs) metal halide perovskites for photovoltaics have gained research interest due to their better thermal stability compared to their organic–inorganic counterparts. However, demonstration of highly efficient Cs-based perovskite solar cells requires high annealing temperature, which limits their use in multijunction devices. In this work, low-temperature-processed cesium lead (Pb) halide perovskite solar cells are demonstrated. We have also successfully incorporated the less toxic strontium (Sr) at a low concentration that partially substitutes Pb in CsPb1–xSrxI2Br. The crystallinity, morphology, absorption, photoluminescence, and elemental composition of this low-temperature-processed CsPb1–xSrxI2Br are studied. It is found that the surface of the perovskite film is enriched with Sr, providing a passivating effect. At the optimal concentration (x = 0.02), a mesoscopic perovskite solar cell using CsPb0.98Sr0.02I2Br achieves a stabilized efficiency at 10.8%. This work shows the potential of inorganic perovskite, stimulating further development of this material.

中文翻译:

掺锶低温处理的CsPbI 2 Br钙钛矿太阳能电池

用于光伏电池的铯金属卤化物钙钛矿由于具有比有机无机混合物更好的热稳定性而引起了研究兴趣。然而,高效Cs基钙钛矿太阳能电池的演示需要较高的退火温度,这限制了它们在多结器件中的使用。在这项工作中,对低温处理的铯铅(Pb)卤化物钙钛矿型太阳能电池进行了演示。我们还成功地将低毒性的锶(Sr)掺入了低浓度的锶中,该锶部分替代了CsPb 1– x Sr x I 2 Br中的Pb 。这种低温处理的CsPb 1x Sr的结晶度,形态,吸收,光致发光和元素组成研究了x I 2 Br。发现钙钛矿膜的表面富含Sr,提供钝化效果。在最佳浓度( x = 0.02)下,使用CsPb 0.98 Sr 0.02 I 2 Br的介观钙钛矿太阳能电池可实现10.8%的稳定效率。这项工作表明了无机钙钛矿的潜力,刺激了这种材料的进一步发展。
更新日期:2017-09-13
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