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Flash Infrared Annealing for Perovskite Solar Cell Processing
Published on: February 3, 2021
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2D Perovskites with Short Interlayer Distance for High-Performance Solar Cell Application.
Chunqing Ma1,2, Dong Shen1,2, Tsz-Wai Ng1,2
1Center of Super-Diamond and Advanced Films (COSDAF) and Department of Chemistry, City University of Hong Kong, Hong Kong SAR, 999077, P. R. China.
Advanced Materials (Deerfield Beach, Fla.)
|April 18, 2018
Summary
Engineered 2D perovskites using propane-1,3-diammonium (PDA) cations enhance charge transport and stability. This breakthrough in 2D perovskite solar cells achieves 13.0% efficiency and improved long-term performance.
Area of Science:
- Materials Science
- Photovoltaics
- Nanotechnology
Background:
- Two-dimensional (2D) perovskites offer enhanced stability over 3D counterparts for photovoltaic applications.
- Conventional 2D perovskites suffer from poor interlayer conductivity due to large organic cations causing quantum confinement.
Purpose of the Study:
- To improve the electrical conductivity and stability of 2D perovskites by reducing the distance between inorganic layers.
- To investigate the impact of replacing large organic cations with smaller propane-1,3-diammonium (PDA) cations.
Main Methods:
- Optical characterizations to assess quantum confinement.
- Electrochemical impedance spectroscopy, time-resolved photoluminescence, and mobility measurements to evaluate charge transport.
- Fabrication and testing of 2D perovskite solar cells (PSCs) for efficiency and stability.
Main Results:
- Reduced quantum confinement observed in PDA-based 2D perovskites.
- Significant enhancement in charge transport properties.
- Achieved a power conversion efficiency of 13.0% for PDA-based PSCs.
- Demonstrated improved environmental stability, retaining over 90% efficiency after 1000 h of storage (encapsulated) and maintaining initial efficiency at 70 °C for over 100 h (unencapsulated).
Conclusions:
- Interlayer engineering with PDA cations effectively reduces charge transport barriers in 2D perovskites.
- PDA-based 2D perovskites exhibit superior optoelectronic properties and intrinsic stability.
- These findings highlight the potential of PDA-modified 2D perovskites for high-performance and durable solar cells.
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