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Updated: Aug 12, 2025
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Influence of Hybrid Perovskite Fabrication Methods on Film Formation, Electronic Structure, and Solar Cell Performance
Published on: February 27, 2017
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3D/2D Core/Shell Perovskite Nanocrystals for High-Performance Solar Cells
1Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory of Advanced Negative Carbon Technologies, Soochow University, 199 Ren'ai Road, Suzhou, Jiangsu, 215123, P. R. China.
Small (Weinheim an Der Bergstrasse, Germany)
|February 1, 2023
Summary
Researchers developed a new perovskite nanocrystal solar cell using a 3D/2D core/shell structure. This design enhances photovoltaic efficiency by passivating surface defects, achieving a power conversion efficiency of 15.53%.
Area of Science:
- Materials Science
- Nanotechnology
- Renewable Energy
Background:
- All-inorganic lead halide perovskite nanocrystals (NCs) show promise for photovoltaics due to superior optoelectronic properties.
- Challenges remain in boosting photovoltaic efficiency because of surface susceptibility and vacancies in perovskite NCs.
Purpose of the Study:
- To engineer a 3D/2D core/shell perovskite heterojunction using CsPbI3 NCs for improved solar cell performance.
- To investigate the role of surface passivation in enhancing photoelectric properties and carrier transport.
Main Methods:
- Fabrication of a 3D/2D core/shell perovskite heterojunction with CsPbI3 NCs.
- Utilizing guanidinium (GA+) rich 2D nanoshells for surface passivation.
- Characterization of solar cell performance and carrier dynamics.
Main Results:
- The GA+-rich 2D nanoshells effectively passivated surface trap states and reduced nonradiative recombination.
- Improved photoelectric properties and carrier transport were observed in the core/shell heterojunction devices.
- Achieved a power conversion efficiency (PCE) of 15.53%, significantly outperforming the control device (13.77%).
Conclusions:
- Surface chemistry plays a critical role in the performance of perovskite NCs-based optoelectronic devices.
- The 3D/2D core/shell heterojunction strategy offers a viable pathway for developing high-efficiency perovskite solar cells.
