UV-Inert ZnTiO3 Electron Selective Layer for Photostable Perovskite Solar Cells

Jing Wei; Fengwan Guo; Bing Liu; Xiangyu Sun; Xi Wang; Zijiang Yang; Kun Xu; Ming Lei; Yicheng Zhao; Dongsheng Xu

doi:10.1002/aenm.201901620

UV-Inert ZnTiO₃ Electron Selective Layer for Photostable Perovskite Solar Cells

Jing Wei, Fengwan Guo, Bing Liu, Xiangyu Sun, Xi Wang, Zijiang Yang, Kun Xu, Ming Lei, Yicheng Zhao^*, Dongsheng Xu

^*Corresponding author for this work

School of Material Science and Engineering

Research output: Contribution to journal › Article › peer-review

60 Citations (Scopus)

Abstract

Although planar-structured perovskite solar cells (PSCs) have power conversion efficiencies exceeding 24%, the poor photostability, especially with ultraviolet irradiance (UV) severely limits commercial application. The most commonly-used TiO₂ electron selective layer has a strong photocatalytic effect on perovskite/TiO₂ interface when TiO₂ is excited by UV light. Here a UV-inert ZnTiO₃ is reported as the electron selective layer in planar PSCs. ZnTiO₃ is a perovskite-structured semiconductor with excellent chemical stability and poor photocatalysis. Solar cells are fabricated with a structure of indium doped tin oxide (ITO)/ZnTiO₃/Cs_0.05FA_0.81MA_0.14PbI_2.55Br_0.45/Sprio-MeOTAD/Au. The champion device exhibits a stabilized power conversion efficiency of 19.8% with improved photostability. The device holds 90% of its initial efficiency after 100 h of UV soaking (365 nm, 8 mW cm⁻²), compared with 55% for TiO₂-based devices. This work provides a new class of electron selective materials with excellent UV stability in perovskite solar cell applications.

Original language	English
Article number	1901620
Journal	Advanced Energy Materials
Volume	9
Issue number	40
DOIs	https://doi.org/10.1002/aenm.201901620
Publication status	Published - 1 Oct 2019

Keywords

UV-inert
ZnTiO
perovskite solar cells
photostable

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This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1002/aenm.201901620

Cite this

Wei, J., Guo, F., Liu, B., Sun, X., Wang, X., Yang, Z., Xu, K., Lei, M., Zhao, Y., & Xu, D. (2019). UV-Inert ZnTiO₃ Electron Selective Layer for Photostable Perovskite Solar Cells. Advanced Energy Materials, 9(40), Article 1901620. https://doi.org/10.1002/aenm.201901620

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