Decoupling the effects of defects on efficiency and stability through phosphonates in stable halide perovskite solar cells

Understanding defects is of paramount importance for the development of stable halide perovskite solar cells (PSCs). However, isolating their distinctive effects on device efficiency and stability is currently a challenge. We report that adding the organic molecule 3-phosphonopropionic acid (H3pp) t...

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Bibliographic Details
Authors: Xie, Haibing|||0000-0002-5070-2882, Wang, Zaiwei, Chen, Zehua, Pereyra, Carlos, Pols, Mike, Gałkowski, Krzysztof, Anaya, Miguel, Fu, Shuai|||0000-0003-4038-2384, Jia, Xiaoyu, Tang, PengYi|||0000-0002-2306-095X, Kubicki, Dominik Józef, Agarwalla, Anand, Kim, Hui-Seon|||0000-0002-9928-3033, Prochowicz, Daniel, Borrisé, Xavier|||0000-0002-6491-4763, Bonn, Mischa|||0000-0001-6851-8453, Bao, Chunxiong, Sun, Xiaoxiao, Zakeeruddin, Shaik Mohammed|||0000-0003-0655-4744, Emsley, Lyndon, Arbiol i Cobos, Jordi|||0000-0002-0695-1726, Gao, Feng, Fu, Fan, Wang, Hai I.|||0000-0003-0940-3984, Tielrooij, Klaas-Jan|||0000-0002-0055-6231, Stranks, Samuel D.|||0000-0002-8303-7292, Tao, Shuxia, Grätzel, Michael|||0000-0002-0068-0195, Hagfeldt, Anders|||0000-0001-6725-8856, Lira-Cantu, Monica|||0000-0002-3393-7436
Format: article
Publication Date:2021
Country:España
Institution:Universitat Autònoma de Barcelona
Repository:Dipòsit Digital de Documents de la UAB
Language:English
OAI Identifier:oai:ddd.uab.cat:248788
Online Access:https://ddd.uab.cat/record/248788
https://dx.doi.org/urn:doi:10.1016/j.joule.2021.04.003
Access Level:Open access
Keyword:Perovskite solar cells
Performance
Stability
Additive engineering
Defect passivation
Shallow point defects
Deep point defects
Phosphonates
Description
Summary:Understanding defects is of paramount importance for the development of stable halide perovskite solar cells (PSCs). However, isolating their distinctive effects on device efficiency and stability is currently a challenge. We report that adding the organic molecule 3-phosphonopropionic acid (H3pp) to the halide perovskite results in unchanged overall optoelectronic performance while having a tremendous effect on device stability. We obtained PSCs with ∼21% efficiency that retain ∼100% of the initial efficiency after 1,000 h at the maximum power point under simulated AM1.5G illumination. The strong interaction between the perovskite and the H3pp molecule through two types of hydrogen bonds (HI and OH) leads to shallow point defect passivation that has a significant effect on device stability but not on the non-radiative recombination and device efficiency. We expect that our work will have important implications for the current understanding and advancement of operational PSCs.

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