1
|
Qiu X, Xu Y, Li R, Jing Y, Yan Z, Liu F, Wu L, Tu Y, Shi J, Du Z, Wu J, Lan Z. High-Efficiency Carbon-based CsPbI 2 Br Perovskite Solar Cells from Dual Direction Thermal Diffusion Treatment with Cadmium Halides. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2206245. [PMID: 36587963 DOI: 10.1002/smll.202206245] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Revised: 11/26/2022] [Indexed: 06/17/2023]
Abstract
In recent years, carbon-based CsPbI2 Br perovskite solar cells (PSCs) have attracted more attention due to their low cost and good stability. However, the power conversion efficiency (PCE) of carbon-based CsPbI2 Br PSCs is still no more than 16%, because of the defects in CsPbI2 Br or at the interface with the electron transport layer (ETL), as well as the energy level mismatch, which lead to the loss of energy, thus limiting PCE values. Herein, a series of cadmium halides are introduced, including CdCl2 , CdBr2 and CdI2 for dual direction thermal diffusion treatment. Some Cd2+ ions thermally diffuse downward to passivate the defects inside or on the surface of SnO2 ETL. Meanwhile, the energy level structure of SnO2 ETL is adjusted, which is in favor of the transfer of electron carriers and blocking holes. On the other hand, part of Cd2+ and Cl- ions thermally diffuse upward into the CsPbI2 Br lattice to passivate crystal defects. Through dual direction thermal diffusion treatment by CdCl2 , CdI2 and CdBr2 , the performance of devices has been significantly improved, and their PCE has been increased from 13.01% of the original device to 14.47%, 14.31%, and 13.46%, respectively. According to existing reports, 14.47% is one of the highest PCE of carbon-based CsPbI2 Br PSCs with SnO2 ETLs.
Collapse
Affiliation(s)
- Xiaosong Qiu
- College of Materials Science & Engineering, Huaqiao University, Xiamen, 361021, P. R. China
- Engineering Research Center of Environment-Friendly Functional Materials, Ministry of Education, Xiamen, 361021, P. R. China
- Fujian Key Laboratory of Photoelectric Functional Materials, Xiamen, 361021, P. R. China
| | - Yuan Xu
- College of Materials Science & Engineering, Huaqiao University, Xiamen, 361021, P. R. China
- Engineering Research Center of Environment-Friendly Functional Materials, Ministry of Education, Xiamen, 361021, P. R. China
- Fujian Key Laboratory of Photoelectric Functional Materials, Xiamen, 361021, P. R. China
| | - Ruoshui Li
- College of Materials Science & Engineering, Huaqiao University, Xiamen, 361021, P. R. China
- Engineering Research Center of Environment-Friendly Functional Materials, Ministry of Education, Xiamen, 361021, P. R. China
- Fujian Key Laboratory of Photoelectric Functional Materials, Xiamen, 361021, P. R. China
| | - Yu Jing
- College of Materials Science & Engineering, Huaqiao University, Xiamen, 361021, P. R. China
- Engineering Research Center of Environment-Friendly Functional Materials, Ministry of Education, Xiamen, 361021, P. R. China
- Fujian Key Laboratory of Photoelectric Functional Materials, Xiamen, 361021, P. R. China
| | - Zhongliang Yan
- College of Materials Science & Engineering, Huaqiao University, Xiamen, 361021, P. R. China
- Engineering Research Center of Environment-Friendly Functional Materials, Ministry of Education, Xiamen, 361021, P. R. China
- Fujian Key Laboratory of Photoelectric Functional Materials, Xiamen, 361021, P. R. China
| | - Fengli Liu
- College of Materials Science & Engineering, Huaqiao University, Xiamen, 361021, P. R. China
- Engineering Research Center of Environment-Friendly Functional Materials, Ministry of Education, Xiamen, 361021, P. R. China
- Fujian Key Laboratory of Photoelectric Functional Materials, Xiamen, 361021, P. R. China
| | - Liyu Wu
- College of Materials Science & Engineering, Huaqiao University, Xiamen, 361021, P. R. China
- Engineering Research Center of Environment-Friendly Functional Materials, Ministry of Education, Xiamen, 361021, P. R. China
- Fujian Key Laboratory of Photoelectric Functional Materials, Xiamen, 361021, P. R. China
| | - Yongsheng Tu
- College of Materials Science & Engineering, Huaqiao University, Xiamen, 361021, P. R. China
- Engineering Research Center of Environment-Friendly Functional Materials, Ministry of Education, Xiamen, 361021, P. R. China
- Fujian Key Laboratory of Photoelectric Functional Materials, Xiamen, 361021, P. R. China
| | - Jialiang Shi
- College of Materials Science & Engineering, Huaqiao University, Xiamen, 361021, P. R. China
- Engineering Research Center of Environment-Friendly Functional Materials, Ministry of Education, Xiamen, 361021, P. R. China
- Fujian Key Laboratory of Photoelectric Functional Materials, Xiamen, 361021, P. R. China
| | - Zhenbo Du
- College of Materials Science & Engineering, Huaqiao University, Xiamen, 361021, P. R. China
- Engineering Research Center of Environment-Friendly Functional Materials, Ministry of Education, Xiamen, 361021, P. R. China
- Fujian Key Laboratory of Photoelectric Functional Materials, Xiamen, 361021, P. R. China
| | - Jihuai Wu
- College of Materials Science & Engineering, Huaqiao University, Xiamen, 361021, P. R. China
- Engineering Research Center of Environment-Friendly Functional Materials, Ministry of Education, Xiamen, 361021, P. R. China
- Fujian Key Laboratory of Photoelectric Functional Materials, Xiamen, 361021, P. R. China
| | - Zhang Lan
- College of Materials Science & Engineering, Huaqiao University, Xiamen, 361021, P. R. China
- Engineering Research Center of Environment-Friendly Functional Materials, Ministry of Education, Xiamen, 361021, P. R. China
- Fujian Key Laboratory of Photoelectric Functional Materials, Xiamen, 361021, P. R. China
| |
Collapse
|
2
|
Du Z, Xiang H, Xie A, Ran R, Zhou W, Wang W, Shao Z. Monovalent Copper Cation Doping Enables High-Performance CsPbIBr 2-Based All-Inorganic Perovskite Solar Cells. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:4317. [PMID: 36500942 PMCID: PMC9736419 DOI: 10.3390/nano12234317] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Revised: 12/02/2022] [Accepted: 12/03/2022] [Indexed: 06/17/2023]
Abstract
Organic-inorganic perovskite solar cells (PSCs) have delivered the highest power conversion efficiency (PCE) of 25.7% currently, but they are unfortunately limited by several key issues, such as inferior humid and thermal stability, significantly retarding their widespread application. To tackle the instability issue, all-inorganic PSCs have attracted increasing interest due to superior structural, humid and high-temperature stability to their organic-inorganic counterparts. Nevertheless, all-inorganic PSCs with typical CsPbIBr2 perovskite as light absorbers suffer from much inferior PCEs to those of organic-inorganic PSCs. Functional doping is regarded as a simple and useful strategy to improve the PCEs of CsPbIBr2-based all-inorganic PSCs. Herein, we report a monovalent copper cation (Cu+)-doping strategy to boost the performance of CsPbIBr2-based PSCs by increasing the grain sizes and improving the CsPbIBr2 film quality, reducing the defect density, inhibiting the carrier recombination and constructing proper energy level alignment. Consequently, the device with optimized Cu+-doping concentration generates a much better PCE of 9.11% than the pristine cell (7.24%). Moreover, the Cu+ doping also remarkably enhances the humid and thermal durability of CsPbIBr2-based PSCs with suppressed hysteresis. The current study provides a simple and useful strategy to enhance the PCE and the durability of CsPbIBr2-based PSCs, which can promote the practical application of perovskite photovoltaics.
Collapse
Affiliation(s)
- Zhaonan Du
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 210009, China
| | - Huimin Xiang
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 210009, China
| | - Amin Xie
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 210009, China
| | - Ran Ran
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 210009, China
| | - Wei Zhou
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 210009, China
| | - Wei Wang
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 210009, China
| | - Zongping Shao
- WA School of Mines: Minerals, Energy and Chemical Engineering, Curtin University, Perth, WA 6845, Australia
| |
Collapse
|