Related Experiment Video
Updated: May 21, 2025
11:38
Influence of Hybrid Perovskite Fabrication Methods on Film Formation, Electronic Structure, and Solar Cell Performance
Published on: February 27, 2017
18.4K
Interfacial Dipole-Induced High Open-Circuit Voltage for Efficient Perovskite Solar Cells
Wenjuan Jiang1, Jinxian Yang1, Haokun Jiang1
1College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China.
Langmuir : the ACS Journal of Surfaces and Colloids
|March 20, 2025
Summary
Surface defects in perovskite films cause energy loss. Modifying perovskite surfaces with 3,3,3-trifluoropropionamide (TFAN) passivates defects, boosting solar cell efficiency and stability.
Area of Science:
- Materials Science
- Photovoltaics
- Chemical Engineering
Background:
- Solution-processed perovskite films suffer from surface and grain boundary defects.
- These defects cause nonradiative recombination, leading to hysteresis and energy losses in perovskite solar cells.
- Interfacial modification is key to improving perovskite solar cell performance.
Purpose of the Study:
- To investigate the use of 3,3,3-trifluoropropionamide (TFAN) as an interfacial modifier for perovskite films.
- To passivate uncoordinated Pb2+ defects on perovskite surfaces using TFAN.
- To enhance the photovoltaic performance and operational stability of perovskite solar cells.
Main Methods:
- Introduction of TFAN, a polar molecule with a permanent dipole moment, to modify perovskite film surfaces.
- Characterization of defect density and recombination dynamics in modified films.
- Fabrication and testing of perovskite solar cells with TFAN-modified interfaces.
Main Results:
- TFAN effectively passivates uncoordinated Pb2+ on perovskite surfaces.
- Interfacial modification with TFAN significantly reduces trap state density and nonradiative recombination.
- TFAN-modified perovskite solar cells achieved a power conversion efficiency of 25.17% (from 22.21%) and an open-circuit voltage of 1.23 V (from 1.14 V).
- Photocurrent was maintained while photovoltaic parameters and operational stability were substantially improved.
Conclusions:
- TFAN is an effective interfacial modifier for perovskite films.
- Passivation of surface defects with TFAN enhances charge transfer and reduces energy losses.
- TFAN-modified perovskite solar cells demonstrate improved efficiency and stability, highlighting the potential for advanced photovoltaic applications.
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