Boosting the Performance of Perovskite Solar Cells through Systematic Investigation of the Annealing Effect of E-Beam Evaporated TiO<sub>2</sub>

Tao Xue; Dandan Chen; Ting Li; Xingxing Chou; Xiao Wang; Zhenyu Tang; Fanghui Zhang; Jin Huang; Kunping Guo; Ashkan Vakilipour Takaloo

doi:10.3390/mi14061095

Micromachines (May 2023)

Boosting the Performance of Perovskite Solar Cells through Systematic Investigation of the Annealing Effect of E-Beam Evaporated TiO<sub>2</sub>

Tao Xue,
Dandan Chen,
Ting Li,
Xingxing Chou,
Xiao Wang,
Zhenyu Tang,
Fanghui Zhang,
Jin Huang,
Kunping Guo,
Ashkan Vakilipour Takaloo

Affiliations

Tao Xue: School of Electronic Information and Artificial Intelligence, Shaanxi University of Science and Technology, Xi’an 710021, China
Dandan Chen: School of Electronic Information and Artificial Intelligence, Shaanxi University of Science and Technology, Xi’an 710021, China
Ting Li: School of Electronic Information and Artificial Intelligence, Shaanxi University of Science and Technology, Xi’an 710021, China
Xingxing Chou: School of Electrical and Control Engineering, Shaanxi University of Science and Technology, Xi’an 710021, China
Xiao Wang: School of Electronic Information and Artificial Intelligence, Shaanxi University of Science and Technology, Xi’an 710021, China
Zhenyu Tang: State Key Laboratory for Artificial Microstructures and Mesoscopic Physics, Department of Physics, Peking University, Beijing 100871, China
Fanghui Zhang: School of Electronic Information and Artificial Intelligence, Shaanxi University of Science and Technology, Xi’an 710021, China
Jin Huang: School of Electronic Information and Artificial Intelligence, Shaanxi University of Science and Technology, Xi’an 710021, China
Kunping Guo: School of Electronic Information and Artificial Intelligence, Shaanxi University of Science and Technology, Xi’an 710021, China
Ashkan Vakilipour Takaloo: Department of Chemical and Process Engineering, University of Canterbury, Christchurch 8140, New Zealand

DOI: https://doi.org/10.3390/mi14061095
Journal volume & issue: Vol. 14, no. 6
p. 1095

Abstract

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Electron transport layer (ETL) plays an undeniable role in improving the performance of n-i-p planar perovskite solar cells (PSCs). Titanium dioxide (TiO2) is known as a promising ETL material for perovskite solar cell. In this work, the effect of annealing temperature on optical, electrical, and surface morphology of the electron-beam (EB)-evaporated TiO2 ETL, and consequently on the performance of perovskite solar cell, was investigated. It was found that annealing treatment at an optimized temperature of 480 °C considerably improved the surface smoothness, density of grain boundaries, and carrier mobility of TiO2 film, which resulted in nearly 10-fold improvement in power conversion efficiency (11.16%) in comparison with the unannealed device (1.08%). The improvement in performance of the optimized PSC is attributed to the acceleration of charge carrier extraction, as well as suppression of the recombination at the ETL/Perovskite interface.

Published in Micromachines

ISSN: 2072-666X (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Technology: Mechanical engineering and machinery
Website: https://www.mdpi.com/journal/micromachines

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