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Defect Passivation Using Trichloromelamine for Highly Efficient and Stable Perovskite Solar Cells
Qiaoli Niu1,2, Ling Zhang1, Yao Xu1
1Key Laboratory for Organic Electronics and Information Displays, Institute of Advanced Materials, Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing 210023, China.
Polymers
|February 15, 2022
Summary
Trichloromelamine (TCM) effectively passivates defects in perovskite solar cells (PSCs), boosting power conversion efficiency (PCE) from 18.87% to 20.15%. This defect passivation strategy also enhances the environmental stability of PSCs.
Area of Science:
- Materials Science
- Renewable Energy
- Photovoltaics
Background:
- Defects in perovskite layers cause nonradiative recombination, reducing perovskite solar cell (PSC) efficiency and stability.
- Defect passivation is crucial for enhancing the performance of PSCs.
Purpose of the Study:
- To investigate trichloromelamine (TCM) as a defect passivator for PSCs.
- To improve the efficiency and environmental stability of PSCs using TCM.
Main Methods:
- TCM was incorporated into the perovskite precursor solution.
- The performance and stability of PSCs with and without TCM were evaluated.
- The mechanism of TCM's passivation effect was studied.
Main Results:
- The power conversion efficiency (PCE) of PSCs increased from 18.87% to 20.15% with TCM addition.
- The environmental stability of the PSCs was significantly improved.
- TCM's passivation mechanism involves interaction between its -NH- group and uncoordinated lead ions.
Conclusions:
- TCM is a promising material for defect passivation in PSCs.
- This strategy leads to highly efficient and stable perovskite solar cells.
- The findings offer a new approach for advancing PSC technology.
