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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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Kim E, Ko C, Kim K, Chen Y, Suh J, Ryu SG, Wu K, Meng X, Suslu A, Tongay S, Wu J, Grigoropoulos CP. Site Selective Doping of Ultrathin Metal Dichalcogenides by Laser-Assisted Reaction. Adv Mater 2016; 28:341-346. [PMID: 26567761 DOI: 10.1002/adma.201503945] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2015] [Revised: 09/21/2015] [Indexed: 06/05/2023]
Abstract
Laser-assisted phosphorus doping is demonstrated on ultrathin transition-metal dichalcogenides (TMDCs) including n-type MoS2 and p-type WSe2 . Temporal and spatial control of the doping is achieved by varying the laser irradiation power and time, demonstrating wide tunability and high site selectivity with high stability. The laser-assisted doping method may enable a new avenue for functionalizing TMDCs for customized nanodevice applications.
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Affiliation(s)
- Eunpa Kim
- Laser Thermal Lab, Department of Mechanical Engineering, University of California, Berkeley, CA, 94720, USA
| | - Changhyun Ko
- Department of Materials Science and Engineering, University of California, Berkeley, CA, 94720, USA
| | - Kyunghoon Kim
- School of Mechanical Engineering, Sungkyunkwan University, Suwon, 440-746, South Korea
| | - Yabin Chen
- Department of Materials Science and Engineering, University of California, Berkeley, CA, 94720, USA
| | - Joonki Suh
- Department of Materials Science and Engineering, University of California, Berkeley, CA, 94720, USA
| | - Sang-Gil Ryu
- Laser Thermal Lab, Department of Mechanical Engineering, University of California, Berkeley, CA, 94720, USA
| | - Kedi Wu
- School for Engineering of Matter, Transport and Energy, Arizona State University, Tempe, AZ, 85287, USA
| | - Xiuqing Meng
- Department of Materials Science and Engineering, University of California, Berkeley, CA, 94720, USA
- School for Engineering of Matter, Transport and Energy, Arizona State University, Tempe, AZ, 85287, USA
- Research Center for Light Emitting Diodes (LED), Zhejiang Normal University, Jinhua, 321004, P. R. China
| | - Aslihan Suslu
- School for Engineering of Matter, Transport and Energy, Arizona State University, Tempe, AZ, 85287, USA
| | - Sefaattin Tongay
- School for Engineering of Matter, Transport and Energy, Arizona State University, Tempe, AZ, 85287, USA
| | - Junqiao Wu
- Department of Materials Science and Engineering, University of California, Berkeley, CA, 94720, USA
- Division of Materials Sciences and Engineering, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Costas P Grigoropoulos
- Laser Thermal Lab, Department of Mechanical Engineering, University of California, Berkeley, CA, 94720, USA
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