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Mo H, Wang D, Chen Q, Guo W, Maniyarasu S, Thomas AG, Curry RJ, Li L, Liu Z. Laser-Assisted Ultrafast Fabrication of Crystalline Ta-Doped TiO 2 for High-Humidity-Processed Perovskite Solar Cells. ACS Appl Mater Interfaces 2022; 14:15141-15153. [PMID: 35330992 PMCID: PMC9098116 DOI: 10.1021/acsami.1c24225] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Accepted: 03/11/2022] [Indexed: 05/27/2023]
Abstract
A titanium dioxide (TiO2) compact film is a widely used electron transport layer (ETL) for n-i-p planar perovskite solar cells (PSCs). However, TiO2 sufferers from poor electrical conductivity, leading to high energy loss at the perovskite/ETL/transparent conductive oxide interface. Doping the TiO2 film with alkali- and transition-metal elements is an effective way to improve its electrical conductivity. The conventional method to prepare these metal-doped TiO2 films commonly requires time-consuming furnace treatments at 450-600 °C for 30 min to 3 h. Herein, a rapid one-step laser treatment is developed to enable doping of tantalum (Ta) in TiO2 (Ta-TiO2) and to simultaneously induce the crystallization of TiO2 films from its amorphous precursor to an anatase phase. The PSCs based on the Ta-TiO2 films treated with the optimized fiber laser (1070 nm) processing parameters (21 s with a peak processing temperature of 800-850 °C) show enhanced photovoltaic performance in comparison to that of the device fabricated using furnace-treated films at 500 °C for 30 min. The ambient-processed planar PSCs fabricated under high relative humidity (RH) of 50-70% display power conversion efficiencies (PCEs) of 18.34% and 16.04% for devices based on Cs0.1FA0.9PbI3 and CH3NH3PbI3 absorbers, respectively. These results are due to the improved physical and chemical properties of the Ta-TiO2 films treated by the optimal laser process in comparison to those for the furnace process. The laser process is rapid, simple, and potentially scalable to produce metal-doped TiO2 films for efficient PSCs.
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Affiliation(s)
- Hongbo Mo
- Department
of Materials, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
- Laser
Processing Research Center, Department of Mechanical, Aerospace and
Civil Engineering, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Dong Wang
- Department
of Materials, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Qian Chen
- Department
of Materials, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
- Laser
Processing Research Center, Department of Mechanical, Aerospace and
Civil Engineering, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Wei Guo
- Laser
Processing Research Center, Department of Mechanical, Aerospace and
Civil Engineering, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Suresh Maniyarasu
- Department
of Physics and Astronomy, School of Natural Sciences, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Andrew G. Thomas
- Department
of Materials, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
- Photon
Science Institute, Department of Electrical and Electronic Engineering, The University of Manchester, Oxford Road, Manchester, M13 9PL, U.K.
- Henry
Royce Institute, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Richard J. Curry
- Photon
Science Institute, Department of Electrical and Electronic Engineering, The University of Manchester, Oxford Road, Manchester, M13 9PL, U.K.
- Henry
Royce Institute, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Lin Li
- Laser
Processing Research Center, Department of Mechanical, Aerospace and
Civil Engineering, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Zhu Liu
- Department
of Materials, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
- Laser
Processing Research Center, Department of Mechanical, Aerospace and
Civil Engineering, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
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