Efficient and Stable MAPbI3-Based Perovskite Solar Cells Using Polyvinylcarbazole Passivation

Lyubov A. Frolova, Aivaz I. Davlethanov, Nadezhda N. Dremova, Ivan Zhidkov, Azat F. Akbulatov, Ernst Z. Kurmaev, Sergey M. Aldoshin, Keith J. Stevenson, Pavel A. Troshin

Research output: Contribution to journalArticlepeer-review

32 Citations (Scopus)


Hybrid perovskite solar cells attract a great deal of attention due to the feasibility of their low-cost production and their demonstration of impressive power conversion efficiencies (PCEs) exceeding 25%. However, the insufficient intrinsic stability of lead halides under light soaking and thermal stress impedes practical implementation of this technology. Herein, we show that the photothermal aging of a widely used perovskite light absorber such as MAPbI3 can be suppressed significantly by using polyvinylcarbazole (PVC) as a stabilizing agent. By applying a few complementary methods, we reveal that the PVC additive leads to passivation of defects in the absorber material. Introducing an optimal content of PVC into MAPbI3 delivers a PCE of 18.7% in combination with a significantly improved solar cell operational lifetime: devices retained 70% of the initial efficiency after light soaking for 1500 h, whereas the control samples without PVC degraded almost completely under the same conditions.

Original languageEnglish
Pages (from-to)6772-6778
Number of pages7
JournalJournal of Physical Chemistry Letters
Issue number16
Publication statusPublished - 20 Aug 2020


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