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Title: Spray-Pyrolyzed Tantalium-Doped TiO2Compact Electron Transport Layer for UV-Photostable Planar Perovskite Solar Cells Exceeding 20% Efficiency
Authors: Çulu, Ayşe
Kaya, İsmail Cihan
Sönmezoğlu, Savaş
Keywords: electron transport layer
perovskite solar cells
spray pyrolysis
Ta-doped TiO2
Electron transport properties
Perovskite solar cells
Semiconductor doping
Spray pyrolysis
Critical component
Electron transport layers
Electron transporting layer
Layer materials
Tantalum-doped TiO2
TiO2 film
Titanium dioxide
Issue Date: 2022
Publisher: American Chemical Society
Abstract: The electron-transporting layer (ETL) material is one of the critical components of the n-i-p planar perovskite solar cells (PSCs). TiO2is the most typically used ETL material; however, low electron mobility and conductivity of TiO2limit the performance of the cells. Ion doping is an effective method for improving the electrical properties of TiO2films. In this study, pure and tantalum (Ta)-doped TiO2films, fabricated with the spray pyrolysis method, were employed as the ETL in the n-i-p planar PSCs. Ta doping improved the electrical conductivity and decreased interface defect between the TiO2electron transport and perovskite layers, promoting efficient electron transfer at the interface. After dopant optimization of transport layers, the overall power conversion efficiency was increased to as high as 20.45% with negligible hysteresis exceeding the previous highest efficiency recorded for Ta-doped TiO2ETL-based PSCs. More importantly, Ta-doped TiO2ETL-based PSCs exhibited an admissible photostability under continuous illumination including UV radiation and retained 65% of their initial efficiency over 300 h in the ambient environment, higher than that of 50% for the control device. These findings indicated that spray-pyrolyzed Ta-doped TiO2films could be a promising compact layer to fabricate highly efficient and UV-stable planar PSCs in large-scale manufacturing. © 2022 American Chemical Society. All rights reserved.
ISSN: 2574-0962
Appears in Collections:Mühendislik ve Doğa Bilimleri Fakültesi Koleksiyonu
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collections
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collections

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