Comparison of the sputtered TiO 2 anatase and rutile thin films as electron transporting layers in perovskite solar cells

Shahvaranfard, Fahimeh; Li, Ning; Schmuki, Patrik; Hosseinpour, Saman; Zhang, Kaicheng; Altomare, Marco; Hejazi, Seyedsina; Brabec, Christoph

doi:10.1002/nano.202100306

Journal Article

FZJ-2022-01304

Comparison of the sputtered TiO 2 anatase and rutile thin films as electron transporting layers in perovskite solar cells

Shahvaranfard, F. (Corresponding author) ; Li, N. (Corresponding author)FZJ* ; Hosseinpour, S. ; Hejazi, S. ; Zhang, K. ; Altomare, M. ; Schmuki, P. ; Brabec, C. (Corresponding author)FZJ*

2022
Wiley-VCH Weinheim, Germany

Nano select 3(5), 990-997 (2022) [10.1002/nano.202100306]

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Please use a persistent id in citations: http://hdl.handle.net/2128/31177 doi:10.1002/nano.202100306

Abstract: We examine comparatively the performance of sputtered TiO2 rutile and anatase thin films as an electron transport layer (ETL) in MAPbI3-based perovskite solar cells. Both anatase and rutile TiO2 ETLs are deposited (on fluorine-doped tin oxide [FTO] substrates) by magnetron sputtering in the form of nanocrystalline thin films. We systematically investigate the role of crystallographic phase composition of TiO2 ETLs on the photovoltaic performance of perovskite solar cells. The champion power conversion efficiencies (PCEs) of 18.4% and 17.7% under reverse scan mode are obtained for perovskite solar cells based on TiO2 anatase and TiO2 rutile ETL, respectively. The results show that the magnetron sputtering deposited ETLs differ from each other only in their phase composition while the overall performance of the devices is not greatly affected by the crystallographic phase of the TiO2 ETLs. Our results point to an important fact that for a proper and reliable comparison between the performance of TiO2 anatase and rutile ETLs, it is crucial to investigate films of similar morphology and structure that are synthesize under similar conditions.

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