A Universal Ternary Solvent System of Surface Passivator Enables Perovskite Solar Cells with Efficiency Exceeding 26%
Surface passivation is a vital approach to improve the photovoltaic performance of perovskite solar cells (PSCs), in which the passivator solvent is an inevitable but easy-ignored factor on passivation effects. Herein, a universal ternary solvent system of surface passivators is proposed through comprehensively considering the solubility and selective perovskite dissolution of the solvent to maximize the passivation effect. Tetrahydrothiophene 1-oxide (THTO) is selected as the passivation promoter by comparing the binding energy with perovskite and the ability to distort the perovskite lattice among various aprotic polar solvent molecules, which can facilitate the passivator's reaction with perovskite and achieve sufficient passivation on perovskite surface. Besides, chlorobenzene (CB) is used as the diluting agent to minimize the amount of isopropanol (IPA), inhibiting the additional solvent-induced defects. As a result, the planar PSCs achieve a power conversion efficiency (PCE) of 26.05%, (certificated 25.66%). Besides, the unencapsulated devices exhibit enhanced stability, which can maintain 95.23% and 95.68% of their initial PCE after 2000 h of storage in ambient air and 800 h of light-soaking in N<sub>2</sub>-glovebox. Moreover, this ternary solvent system also exhibits a well applicability and reliability in different passivator such as PEAI, BAI, and so on.
Authors
- Meicheng Li (ORCID: https://orcid.org/0000-0002-0731-741X)
- Hao Huang (ORCID: https://orcid.org/0000-0003-4416-5459)
- Peng Cui (ORCID: https://orcid.org/0000-0002-5869-4493)
- Zhineng Lan
- Shujie Qu (ORCID: https://orcid.org/0000-0003-4862-3648)
- Yi Suo
- Qiang Zhang (ORCID: https://orcid.org/0000-0001-8519-5158)
- Min Wang (ORCID: https://orcid.org/0000-0002-2857-6760)
- Yi Lu (ORCID: https://orcid.org/0000-0002-6664-2095)
- Tongtong Jiang (ORCID: https://orcid.org/0000-0002-4076-1010)
- Zhiwei Wang
- Shuxian Du (ORCID: https://orcid.org/0009-0002-4693-5429)
- Yingying Yang (ORCID: https://orcid.org/0000-0001-6973-0616)
Institutions
- North China Electric Power University (CN)
Publication Details
- Journal
- Advanced Materials
- Published
- 2024-10-25
- DOI
- https://doi.org/10.1002/adma.202410390
- Citations
- 47
- Primary Topic
- Perovskite Materials and Applications
- Type
- article
- Field-Weighted Citation Impact
- 9.81
Funders
- National Natural Science Foundation of China
- North China Electrical Power University
- State Key Laboratory Of Alternate Electrical Power System With Renewable Energy Sources
- Fujian Province Key Laboratory of Special Aquatic Formula Feed (Fujian Tianma Science and Technology Group)
- Young Elite Scientists Sponsorship Program by Tianjin
- Beijing Nova Program
- Pearl River S and T Nova Program of Guangzhou
- Natural Science Foundation of Tianjin Municipal Science and Technology Commission
- Fundamental Research Funds for the Central Universities
- Key Laboratory of Engineering Dielectrics and Its Application (Harbin University of Science and Technology), Ministry of Education
- Guangxi Key Research and Development Program