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Silane Doping for Efficient Flexible Perovskite Solar Cells with Improved Defect Passivation and Device Stability
Xiaomei Chen1,2, Ling Ai2, Hong Ji2
1School of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, China.
ACS Applied Materials & Interfaces
|April 23, 2024
Summary
Doping perovskite solar cells with 3-amino-propyl triethoxysilane (APTES) passivates defects and enhances stability. This strategy improves crystal quality and carrier properties, boosting flexible perovskite solar cell efficiency to 19.84%.
Area of Science:
- Materials Science
- Photovoltaics
- Chemical Engineering
Background:
- Perovskite solar cells (PSCs) offer high efficiency but suffer from instability and defects.
- Controlling perovskite crystallization and preventing degradation are key challenges for commercialization.
Purpose of the Study:
- To investigate the effectiveness of 3-amino-propyl triethoxysilane (APTES) as a dopant in perovskite precursors.
- To enhance the performance, stability, and morphology of perovskite films for flexible solar cells.
Main Methods:
- Incorporation of APTES into the perovskite precursor solution.
- Analysis of perovskite film morphology, crystal orientation, and defect passivation.
- Fabrication and testing of flexible perovskite solar cells.
Main Results:
- APTES doping effectively passivates crystal defects and controls crystallization.
- APTES forms oligomers, blocking water ingress and improving film density.
- Perovskite films exhibit preferential (110) crystal orientation, increased carrier lifetime, and mobility.
- The champion flexible PSC achieved a power conversion efficiency of 19.84% with enhanced air stability.
- Device efficiency remained stable after 360s of maximum power point irradiation.
Conclusions:
- APTES doping is a viable strategy for improving perovskite film quality and device performance.
- The passivation mechanism involves defect reduction and enhanced structural integrity.
- This method significantly advances the stability and efficiency of flexible perovskite solar cells.
