Organic hole-transporting materials for 9.32%-efficiency and stable CsPbBr3 perovskite solar cells†,Materials Chemistry Frontiers

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Organic hole-transporting materials for 9.32%-efficiency and stable CsPbBr3 perovskite solar cells†
Materials Chemistry Frontiers ( IF 6.0 ) Pub Date : 2018-10-08 00:00:00 , DOI: 10.1039/c8qm00337h
Yuanyuan Zhao _{1,

2,

3,

4,

5} , Tianshu Liu _{1,

2,

3,

4,

5} , Fumeng Ren _{5,

6,

7,

8} , Jialong Duan _{1,

2,

3,

4,

5} , Yudi Wang _{1,

2,

3,

4,

5} , Xiya Yang _{1,

2,

3,

4,

5} , Qinghua Li _{5,

6,

7,

8} , Qunwei Tang _{1,

2,

3,

4,

5}

Affiliation

Cost-effective and stable CsPbBr₃-based inorganic perovskite solar cells (PSCs) are regarded as promising candidates for next-generation photovoltaics. However, the large interfacial energy differences at the CsPbBr₃/hole-transporting layer lead to serious charge recombination and poor charge extraction kinetics. Herein, we prepare a series of hole-transporting materials (HTMs) to improve hole extraction and to reduce electron–hole recombination at the CsPbBr₃/HTM interface. In comparison with the power conversion efficiency (PCE) of 6.10% for an HTM-free device, the CsPbBr₃ PSCs with polymeric HTMs such as polythiophene, polypyrrole and polyaniline yield efficiencies of 8.36%, 8.32% and 7.69%, respectively. Similarly, the inorganic PSC with organic small molecule BT-BTH achieves a PCE as high as 9.32% due to the improved hole conductivity. Moreover, the unencapsulated PSC with BT-BTH maintains 94% of its initial efficiency in 70% relative humidity over 80 days.

中文翻译：

有机空穴传输材料，可实现9.32％的效率和稳定的CsPbBr ₃钙钛矿型太阳能电池†

具有成本效益且稳定的基于CsPbBr ₃的无机钙钛矿太阳能电池（PSC）被认为是下一代光伏技术的有希望的候选者。但是，CsPbBr ₃ /空穴传输层的界面能差很大，导致严重的电荷复合和较差的电荷提取动力学。本文中，我们准备了一系列空穴传输材料（HTM），以改善空穴提取并减少CsPbBr ₃ / HTM界面处的电子-空穴复合。与不含HTM的设备的6.10％的功率转换效率（PCE）相比，CsPbBr ₃具有聚合HTM（例如聚噻吩，聚吡咯和聚苯胺）的PSC的产率分别为8.36％，8.32％和7.69％。同样，具有有机小分子BT-BTH的无机PSC由于改善了空穴电导率，因此PCE高达9.32％。此外，具有BT-BTH的未封装PSC在80天内的相对湿度为70％的情况下仍可保持94％的初始效率。

更新日期：2018-10-08

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