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Multifunctional sulfonium-based treatment for perovskite solar cells with less than 1% efficiency loss over 4,500-h operational stability tests

Published version
Peer-reviewed

Repository DOI


Type

Article

Change log

Authors

Bogachuk, Dmitry 
Doherty, Tiarnan AS 

Abstract

Stabilizing grain boundaries and surfaces of the perovskite layer is critical to extend device durability. Here we introduced an unexplored sulfonium-based molecule to post-treat formamidinium lead iodide perovskite films, which shows outstanding stability upon light soaking and remarkably remains in black-phase after 2 years ageing under ambient condition without encapsulation. The DMPESI-treated PSCs deliver a breakthrough record in operational stability of highly-efficient PSCs with less than 1% performance loss after more than 4500 h at maximum power point tracking, yielding a theoretical T80 of over 9 years under continuous 1-sun illumination. They also present less than 5% PCE drops under various ageing conditions (including thermal cycling and damp heat test).

Description

Keywords

40 Engineering, 4016 Materials Engineering

Journal Title

Nature Energy

Conference Name

Journal ISSN

2058-7546
2058-7546

Volume Title

Publisher

Nature Research
Sponsorship
European Research Council (756962)
Engineering and Physical Sciences Research Council (EP/R023980/1)