A new polytriarylamine derivative for dopant-free high-efficiency perovskite solar cells. Issue 11 (30th July 2019)

• Record Type: Journal Article
• Authors: Tsarev, Sergey; Yakushchenko, Igor K.; Luchkin, Sergey Yu; Kuznetsov, Petr M.; Timerbulatov, Ruslan S.; Dremova, Nadezhda N.; Frolova, Lyubov A.; Stevenson, Keith. J.; Troshin, Pavel A.
• Is Part Of: Sustainable energy & fuels. Volume 3:Issue 11(2019)
• Page Start: 2627
• Page End: 2632
• Publication Date: 2019-07-30
• Subjects: Renewable energy sources -- Periodicals; Fuel cells -- Periodicals; Electric batteries -- Periodicals; Electrochemistry -- Periodicals; 660.297
• DOI: 10.1039/c9se00448c
• Languages: English
• ISSNs: 2398-4902

Abstract

Abstract : Modification of PTAA molecular structure significantly improves the power conversion efficiencies of dopant-free HTL n–i–p perovskite solar cells. Abstract : The development of dopant-free organic charge transport layers is crucial for achieving long-term stability of perovskite solar cells. In this paper, we present a new polytriarylamine derivative, poly[bis(4-phenyl)(4-methylphenyl)amine] (PTA), which showed significantly improved photovoltaic performance compared to dopant-free PTAA. Perovskite solar cells based on the PTA/MoO3 hybrid hole-transport layer (HTL) and MAPbI3 absorber delivered a competitive 17.0% efficiency, which is currently the highest value achieved for n–i–p perovskite solar cells using dopant-free polytriarylamine-type HTLs. The enhanced device performance was attributed to a better HOMO alignment of PTA (5.38 eV) vs. PTAA (5.27 eV) with respect to the perovskite valence band.