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Interfacial Bridge Using a cis‐Fulleropyrrolidine for Efficient Planar Perovskite Solar Cells with Enhanced Stability
Small Methods ( IF 10.7 ) Pub Date : 2019-10-01 , DOI: 10.1002/smtd.201900476
Chengbo Tian 1 , Kebin Lin 1 , Jianxun Lu 1 , Wenjing Feng 1 , Peiquan Song 1 , Liqiang Xie 1 , Zhanhua Wei 1
Affiliation  

Fullerene derivatives, especially after purposely functionalization, have potential to efficiently passivate interfacial defects between perovskites and electron transport layers. In this work, a fullerene derivative with amine functional group, 2,5‐diphenyl C60 fulleropyrrolidine (DPC60), is synthesized and employed as an interfacial layer between a perovskite and SnO2 in planar perovskite solar cells (PSCs). The cis‐configuration and the specific amine group of DPC60 effectively enhance the chemical interaction between the perovskite and DPC60, promoting the passivation of perovskite defects at the interface. The suitable energy level of DPC60 and the improved conductivity of the SnO2/DPC60 film facilitate the electron extraction from the perovskite layer. As a result, PSCs incorporated with DPC60 reach a PCE of 20.4% with high reproducibility, which is much higher than that of the bare SnO2 based devices (18.8%). Furthermore, the hydrophobic DPC60 layer suppresses heterogeneous nucleation and improves the crystallinity of the perovskite film, resulting in better device stability, retaining 82% of its initial efficiency after 200 h of 1 sun continuous irradiation and thermal ageing (55 ± 5 °C).

中文翻译:

使用顺式-完全吡咯烷酮的界面桥用于具有增强稳定性的高效平面钙钛矿太阳能电池

富勒烯衍生物,特别是在有意地官能化之后,具有有效钝化钙钛矿和电子传输层之间的界面缺陷的潜力。在这项工作中,合成了具有胺官能团的富勒烯衍生物2,5-二苯基C 60富勒吡咯烷(DPC 60),并将其用作平面钙钛矿太阳能电池(PSC)中钙钛矿和SnO 2之间的界面层。DPC 60顺式构型和特定的胺基可有效增强钙钛矿与DPC 60之间的化学相互作用,从而促进界面处钙钛矿缺陷的钝化。DPC 60的合适能量等级SnO 2 / DPC 60膜的导电性提高,有利于钙钛矿层中的电子提取。结果,与DPC 60结合的PSC达到了20.4%的PCE,并且具有很高的重现性,远高于基于SnO 2的裸设备(18.8%)的PCE 。此外,疏水性DPC 60层抑制了异质形核并改善了钙钛矿薄膜的结晶度,从而获得了更好的设备稳定性,在连续1个阳光照射200 h和热老化(55±5°C)后仍保持其初始效率的82% 。
更新日期:2019-10-01
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