Abstract：
:Although the power conversion efficiency (PCE) of perovskite solar cells (PSCs) reached up to 23%, their short lifetime and fast degradation still remain as the main challenges. In this work, a new facile optical method based on the high power UV-irradiation is presented for the recovery of the degraded PSCs. Addition to the full recovery of the performance, about 20% PCE enhancement and hystersis reduction are also achieved by UV-irradiation. UV-treatment causes modifications in both the bulk properties of the perovskite layer and the energy equilibrium at the interfaces. It is shown that UV-treatment effectively passivates the surface and grain boundaries defects in different types of the devices comprising normal and inverted configurations that is confirmed by the reduction of the density of defect states (DOS). It is proposed that UV-light passivates the shallow and deep defects by dissociation of adsorbed hydroxyl groups and water molecules during the device storage.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Arabpour Roghabadi F,Mansour Rezaei Fumani N,Alidaei M,Ahmadi V,Sadrameli SMdoi
10.1038/s41598-019-45756-1subject
Has Abstractpub_date
2019-07-01 00:00:00pages
9448issue
1issn
2045-2322pii
10.1038/s41598-019-45756-1journal_volume
9pub_type
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