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Limitations of a polymer-based hole transporting layer for application in planar inverted perovskite solar cells

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Abstract

Planar inverted lead halide photovoltaics demonstrate remarkable photoconversion properties when employing poly(triarylamine) (PTAA) as a hole transporting layer. Herein, we elucidate the effect of ambient ultraviolet (UV) degradation on the structural and operational stability of the PTAA hole transporter through a series of rigorous optoelectrical characterization protocols. Due attention was given to the interplay between the polymer and perovskite absorber, both within the framework of a bilayer structure and fully assembled solar cells. The obtained results imply that UV degradation exerts a major influence on the structural integrity of PTAA, rather than on the interface with the perovskite light harvester. Moreover, UV exposure induced more adverse effects on tested samples than environmental humidity and oxygen, contributing more to the overall reduction of charge extraction properties of PTAA, as well as increased defect population upon prolonged UV exposure.

Graphical abstract: Limitations of a polymer-based hole transporting layer for application in planar inverted perovskite solar cells

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Publication details

The article was received on 15 Apr 2019, accepted on 21 Jun 2019 and first published on 21 Jun 2019


Article type: Paper
DOI: 10.1039/C9NA00246D
Nanoscale Adv., 2019, Advance Article
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    Limitations of a polymer-based hole transporting layer for application in planar inverted perovskite solar cells

    M. Petrović, T. Maksudov, A. Panagiotopoulos, E. Serpetzoglou, I. Konidakis, M. M. Stylianakis, E. Stratakis and E. Kymakis, Nanoscale Adv., 2019, Advance Article , DOI: 10.1039/C9NA00246D

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