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Zhu L, Zhang J, Xu F, Cao B. Simultaneous Defect Passivation and Electric Level Regulation with Rubidium Fluoride for High-Efficiency CsPbI 2Br Perovskite Solar Cells. ACS APPLIED MATERIALS & INTERFACES 2024. [PMID: 38687880 DOI: 10.1021/acsami.4c02980] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2024]
Abstract
Due to the good balance of efficiency and stability, CsPbI2Br perovskite solar cells (PSCs) recently have attracted widespread attention. However, the improvement in photovoltaic performance for CsPbI2Br PSCs was mainly limited by massive defects and unmatched energy levels. Surface modification is the most convenient and effective strategy to decrease defect densities of perovskite films. Herein, we deposited rubidium fluoride (RbF) onto the surface of CsPbI2Br perovskite films by spin-coating. The numerous defects could be significantly passivated by RbF, resulting in suppressed nonradiative recombination. Furthermore, the CsPbI2Br perovskite film after RbF treatment exhibits a deeper Fermi level, and an additional built-in electric field forms to promote charge transport. Consequently, the champion device achieves a high efficiency of 10.82% with an improved VOC of 1.14 V, and it also exhibits excellent stability after long-term storage. This work offers a simple and effective approach to enhance the photovoltaic performance and stability of PSCs for broader applications in the future.
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Affiliation(s)
- Linhao Zhu
- School of Physics and Physical Engineering, Qufu Normal University, Qufu, Shandong 273165, P. R. China
| | - Junshuai Zhang
- School of Material Science and Engineering, University of Jinan, Jinan, Shandong 250022, P. R. China
| | - Fan Xu
- School of Physics and Physical Engineering, Qufu Normal University, Qufu, Shandong 273165, P. R. China
| | - Bingqiang Cao
- School of Material Science and Engineering, University of Jinan, Jinan, Shandong 250022, P. R. China
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Li X, Liu J, Jiang G, Lin X, Wang J, Li Z. Self-supported CsPbBr 3/Ti 3C 2T x MXene aerogels towards efficient photocatalytic CO 2 reduction. J Colloid Interface Sci 2023; 643:174-182. [PMID: 37058892 DOI: 10.1016/j.jcis.2023.04.015] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Revised: 03/31/2023] [Accepted: 04/04/2023] [Indexed: 04/16/2023]
Abstract
Aerogels, especially MXene aerogels, are an ideal multifunctional platform for developing efficient photocatalysts for CO2 reduction because they are featured by abundant catalytic sites, high electrical conductivity, high gas absorption ability and self-supported structure. However, the pristine MXene aerogel has almost no ability to utilize light, which requires additional photosensitizers to assist it in achieving efficient light harvesting. Herein, we immobilized colloidal CsPbBr3 nanocrystals (NCs) onto the self-supported Ti3C2Tx (where Tx represents surface terminations such as fluorine, oxygen, and hydroxyl groups) MXene aerogels for photocatalytic CO2 reduction. The resultant CsPbBr3/Ti3C2Tx MXene aerogels exhibit a remarkable photocatalytic activity toward CO2 reduction with total electron consumption rate of 112.6 μmol g-1h-1, which is 6.6-fold higher than that of the pristine CsPbBr3 NC powders. The improvement of the photocatalytic performance is presumably attributed to the strong light absorption, effective charge separation and CO2 adsorption in the CsPbBr3/Ti3C2Tx MXene aerogels. This work presents an effective perovskite-based photocatalyst in aerogel form and opens a new avenue for their solar-to-fuel conversions.
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Affiliation(s)
- Xin Li
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, Jinhua 321004, Zhejiang, P.R. China
| | - Jiale Liu
- Zhejiang Institute of Optoelectronics, Zhejiang Normal University, Jinhua 321004, Zhejiang, P.R. China; Zhejiang Provincial Key Laboratory of Solid State Optoelectronic Devicces, Zhejiang Normal University, Jinhua 321004, Zhejiang, P.R. China
| | - Guocan Jiang
- Zhejiang Institute of Optoelectronics, Zhejiang Normal University, Jinhua 321004, Zhejiang, P.R. China; Zhejiang Provincial Key Laboratory of Solid State Optoelectronic Devicces, Zhejiang Normal University, Jinhua 321004, Zhejiang, P.R. China.
| | - Xinyu Lin
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, Jinhua 321004, Zhejiang, P.R. China
| | - Jin Wang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, Jinhua 321004, Zhejiang, P.R. China; Zhejiang Institute of Optoelectronics, Zhejiang Normal University, Jinhua 321004, Zhejiang, P.R. China.
| | - Zhengquan Li
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, Jinhua 321004, Zhejiang, P.R. China; Zhejiang Institute of Optoelectronics, Zhejiang Normal University, Jinhua 321004, Zhejiang, P.R. China.
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Yi Z, Xiao B, Li X, Luo Y, Jiang Q, Yang J. Revealing the interfacial properties of halide ions for efficient and stable flexible perovskite solar cells. J Colloid Interface Sci 2022; 628:696-704. [DOI: 10.1016/j.jcis.2022.07.175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Revised: 06/27/2022] [Accepted: 07/27/2022] [Indexed: 10/16/2022]
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Thiourea with sulfur-donor as an effective additive for enhanced performance of lead-free double perovskite photovoltaic cells. J Colloid Interface Sci 2022; 628:476-485. [DOI: 10.1016/j.jcis.2022.07.165] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2022] [Revised: 07/19/2022] [Accepted: 07/26/2022] [Indexed: 11/19/2022]
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