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Monovalent Cation Doping of CH3NH3PbI3 for Efficient Perovskite Solar Cells
Published on: March 19, 2017
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Rational Strategies for Efficient Perovskite Solar Cells
Jangwon Seo1, Jun Hong Noh1, Sang Il Seok1,2
1Division of Advanced Materials, Korea Research Institute of Chemical Technology , 141 Gajeong-Ro, Yuseong-Gu, Daejeon 305-600, Republic of Korea.
Accounts of Chemical Research
|March 8, 2016
Summary
High-efficiency, low-cost perovskite solar cells (PSCs) were developed using a novel pillared architecture and optimized materials. This advancement significantly boosted power conversion efficiency (PCE) for practical solar energy conversion.
Area of Science:
- Materials Science
- Renewable Energy
- Nanotechnology
Background:
- Achieving high-efficiency, stable, and low-cost solar cells is crucial for large-scale solar energy adoption.
- Inorganic-organic hybrid lead halide perovskites offer promising light-absorbing properties for efficient solar cells.
- Previous perovskite solar cells (PSCs) faced challenges in stability and efficiency.
Purpose of the Study:
- To develop a novel photovoltaic platform for efficient perovskite solar cells (PSCs).
- To enhance power conversion efficiency (PCE) and long-term stability of PSCs.
- To explore material engineering and architectural designs for improved PSC performance.
Main Methods:
- Fabrication of a pillared architecture with a three-dimensional nanocomposite of perovskites infiltrating mesoporous TiO2.
- Development of intermediate chemistry to control perovskite film formation and retard reactions.
- Materials engineering for phase stability and band gap tuning of perovskite layers.
- Design of electron and hole transporting materials for carrier-selective contacts.
- Implementation of p-i-n and n-i-p architectures.
Main Results:
- A pioneering photovoltaic platform achieved an initial PCE of 12%.
- Subsequent advancements rapidly increased certified PCE to over 20%.
- Refined bicontinuous architectures, optimized deposition processes, and perovskite composition were key to efficiency gains.
- Mesoporous scaffolds and specific cell architectures influenced hysteresis.
Conclusions:
- The developed photovoltaic platform and refined architectures significantly enhance PSC efficiency and stability.
- Materials engineering and precise control over film morphology are critical for high-performance PSCs.
- Further research is needed to address challenges for future commercialization of PSCs.
