Improving the moisture stability of perovskite solar cells by using PMMA/P3HT based hole-transport layers,Materials Chemistry Frontiers

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Improving the moisture stability of perovskite solar cells by using PMMA/P3HT based hole-transport layers
Materials Chemistry Frontiers ( IF 6.0 ) Pub Date : 2017-10-31 00:00:00 , DOI: 10.1039/c7qm00396j
Soumya Kundu _{1,

2,

3,

4} , Timothy L. Kelly _{1,

2,

3,

4}

Affiliation

In recent years, the performance of lead halide perovskite solar cells has increased dramatically, setting a record efficiency of 22.1%; however, their sensitivity towards water limits their utility and still needs to be addressed. While many different materials and methods are being developed to solve this problem, recent studies have suggested that modifications to the hole-transport layer can be effectively used to improve device stability. In this study, we report a new device architecture that makes use of a poly(3-hexylthiophene) (P3HT) nanowire network in a poly(methyl methacrylate) (PMMA) matrix as the hole-transport layer. The PMMA matrix imparts excellent resistance toward the ingress of both liquid and vapor-phase water, and leads to a large increase in the stability of the device. Using a combination of in situ absorbance spectroscopy, powder X-ray diffraction and device measurements, we have quantified the increase in device stability; optimized PMMA/P3HT layers can improve device lifetimes by an order of magnitude.

中文翻译：

通过使用基于PMMA / P3HT的空穴传输层提高钙钛矿太阳能电池的水分稳定性

近年来，钙钛矿型卤化铅太阳能电池的性能得到了极大的提高，创下了22.1％的创纪录效率。但是，它们对水的敏感性限制了其实用性，仍然需要解决。尽管正在开发许多不同的材料和方法来解决该问题，但最近的研究表明，可以有效地使用对空穴传输层的修改来改善器件的稳定性。在这项研究中，我们报告了一种新的器件架构，该架构利用了聚甲基丙烯酸甲酯（PMMA）基质中的聚（3-己基噻吩）（P3HT）纳米线网络作为空穴传输层。PMMA基质对液相和气相水的进入均具有出色的抵抗力，并大大提高了设备的稳定性。使用原位组合吸收光谱，粉末X射线衍射和器件测量，我们已经量化了器件稳定性的提高；优化的PMMA / P3HT层可以将器件寿命提高一个数量级。

更新日期：2017-11-08

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