Science· 2015Q1
High-performance photovoltaic perovskite layers fabricated through intramolecular exchange
- 6,199citations
- Q1SCImago
- 2015year
Short summary
A new method uses intramolecular exchange to create dense, uniform formamidinium lead iodide (FAPbI3) perovskite films, achieving over 20% power conversion efficiency in solar cells.
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Key points
- Developed an intramolecular exchange method for FAPbI3 perovskite film deposition.
- Achieved (111)-preferred crystallographic orientation and large-grained, dense microstructures.
- Eliminated residual PbI2, resulting in flat film surfaces.
- Fabricated perovskite solar cells with >20% power conversion efficiency.
AI-generated from the title and abstract; the full text is not read.
Abstract
The band gap of formamidinium lead iodide (FAPbI3) perovskites allows broader absorption of the solar spectrum relative to conventional methylammonium lead iodide (MAPbI3). Because the optoelectronic properties of perovskite films are closely related to film quality, deposition of dense and uniform films is crucial for fabricating high-performance perovskite solar cells (PSCs). We report an approach for depositing high-quality FAPbI3 films, involving FAPbI3 crystallization by the direct intramolecular exchange of dimethylsulfoxide (DMSO) molecules intercalated in PbI2 with formamidinium iodide. This process produces FAPbI3 films with (111)-preferred crystallographic orientation, large-grained dense microstructures, and flat surfaces without residual PbI2. Using films prepared by this technique, we fabricated FAPbI3-based PSCs with maximum power conversion efficiency greater than 20%.
The authors' abstract, as published at the source. Science, 2015 · DOI ↗
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Field: Electrical and Electronic Engineering
Electrical and Electronic EngineeringEngineering