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CsPbI2Br Perovskite Solar Cells Based on Carbon Black-Containing Counter Electrodes.
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2020-07-13 , DOI: 10.1021/acsami.0c08006
Shuiping Gong 1, 2 , Haiyan Li 1 , Zongqi Chen 1 , Chunhui Shou 3 , Mianji Huang 3 , Songwang Yang 1, 2
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2020-07-13 , DOI: 10.1021/acsami.0c08006
Shuiping Gong 1, 2 , Haiyan Li 1 , Zongqi Chen 1 , Chunhui Shou 3 , Mianji Huang 3 , Songwang Yang 1, 2
Affiliation
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CsPbI2Br perovskite solar cells (PSCs) based on carbon electrodes (CEs) are considered to be low-cost and thermally stable devices. Nevertheless, the insufficient contact and energy level mismatch between the CsPbI2Br layer and CE hinder the further enhancement of the cell efficiency. Herein, a carbon black (CB) interlayer was introduced between the perovskite layer and CE. The hole extraction was facilitated due to the larger contact area and suitable energy band alignment in the CsPbI2Br/CB interface. Further investigation indicated the diffusion of CB nanoparticles from the CE or CB layer to the CsPbI2Br film after a certain period of time. We disclosed the formation of a CB-CsPbI2Br bulk heterojunction structure due to the carbon diffusion, which resulted in an efficiency enhancement. As a result, a record efficiency of 13.13% is achieved for carbon-based inorganic PSCs. This work also reveals that the diffusion of CB nanoparticles in CB-containing PSCs is universal and inevitable, although this kind of diffusion results in the enhancement of cell efficiency.
中文翻译：
基于含炭黑对电极的CsPbI2Br钙钛矿太阳能电池。
基于碳电极（CE）的CsPbI 2 Br钙钛矿太阳能电池（PSC）被认为是低成本且热稳定的设备。然而，CsPbI 2 Br层与CE之间的接触不足和能级不匹配阻碍了电池效率的进一步提高。在此，在钙钛矿层和CE之间引入了炭黑（CB）中间层。由于更大的接触面积和CsPbI 2 Br / CB界面中合适的能带排列，促进了空穴的提取。进一步的研究表明，经过一定时间后，CB纳米粒子从CE或CB层扩散到CsPbI 2 Br膜。我们公开了CB-CsPbI 2的形成由于碳扩散，Br本体异质结结构导致效率提高。结果，碳基无机PSC的效率达到了创纪录的13.13％。这项工作还揭示了CB纳米粒子在含CB的PSC中的扩散是普遍且不可避免的，尽管这种扩散会导致细胞效率的提高。
更新日期：2020-08-05
中文翻译：
基于含炭黑对电极的CsPbI2Br钙钛矿太阳能电池。
基于碳电极（CE）的CsPbI 2 Br钙钛矿太阳能电池（PSC）被认为是低成本且热稳定的设备。然而，CsPbI 2 Br层与CE之间的接触不足和能级不匹配阻碍了电池效率的进一步提高。在此，在钙钛矿层和CE之间引入了炭黑（CB）中间层。由于更大的接触面积和CsPbI 2 Br / CB界面中合适的能带排列，促进了空穴的提取。进一步的研究表明，经过一定时间后，CB纳米粒子从CE或CB层扩散到CsPbI 2 Br膜。我们公开了CB-CsPbI 2的形成由于碳扩散，Br本体异质结结构导致效率提高。结果，碳基无机PSC的效率达到了创纪录的13.13％。这项工作还揭示了CB纳米粒子在含CB的PSC中的扩散是普遍且不可避免的，尽管这种扩散会导致细胞效率的提高。
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