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Regulating the crystallization dynamics through hydrogen bonding for high efficiency tin halide perovskite solar
Zhiyue Tang1, Cheng Wu1, Shurong Wang1
1School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 611731, China. haofeng@uestc.edu.cn.
Chemical Communications (Cambridge, England)
|July 11, 2023
Summary
Aniline addition improved tin halide perovskite solar cells by optimizing crystal orientation and charge transport. This resulted in lead-free perovskite solar cells with 12.04% efficiency and 788 mV open-circuit voltage.
Area of Science:
- Materials Science
- Photovoltaics
- Solid-State Chemistry
Background:
- Tin halide perovskites are promising lead-free alternatives for solar cells.
- Controlling perovskite crystal orientation is crucial for efficient charge transport.
- Stabilizing perovskite structures enhances device longevity and performance.
Purpose of the Study:
- To investigate the effect of aniline on tin halide perovskite solar cells.
- To optimize crystal orientation and charge transport in lead-free perovskites.
- To enhance the power conversion efficiency and open-circuit voltage of tin halide perovskite solar cells.
Main Methods:
- Aniline was introduced into tin halide perovskite precursor solutions.
- Hydrogen bonding interactions between aniline and formamidinium iodide (FAI) were utilized.
- Crystal orientation, charge transport, and structural stability were analyzed.
Main Results:
- Aniline optimized the crystal orientation of tin halide perovskites.
- Improved charge transport and structural stabilization were observed.
- Lead-free tin halide perovskite solar cells reached 12.04% power conversion efficiency.
- A high open-circuit voltage of 788 mV was achieved.
Conclusions:
- Aniline is an effective additive for enhancing tin halide perovskite solar cells.
- The hydrogen bonding interaction plays a key role in performance improvement.
- Achieving high efficiency in lead-free perovskite solar cells is feasible.
