期刊
ACS APPLIED MATERIALS & INTERFACES
卷 13, 期 18, 页码 21194-21206出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.1c00677
关键词
ionic liquid-assisted MAPbI(3) nanoparticle-seeded growth; dense perovskite; perovskite solar cells; stability
资金
- Mitani Foundation for Research and Development
- [20H02838]
This study introduces a novel CsFAMA triple-cation-based perovskite precursor solution and utilizes IL-assisted MAPbI(3) nanoparticle seeded growth method to enhance the quality of perovskite films and device performance, achieving a PCE of 19.44% for PSCs. The results of long-term light soaking and moisture stability testing demonstrate the feasibility and stability of this approach towards developing stable and reliable perovskite photovoltaic devices.
With the rapid improvement of perovskite solar cells (PSCs), long-life operational stability has become a major requirement for their commercialization. In this work, we devised a pristine cesium-formamidinium-methylammonium (termed as CsFAMA) triple-cation-based perovskite precursor solution into the ionic liquid (IL)-assisted MAPbI(3) nanoparticles (NPs) through a seeded growth approach in which the host IL-assisted MAPbI(3) NPs remarkably promote high-quality perovskite films with large single-crystal domains, enhancing the device performance and stability. The power conversion efficiency (PCE) of the MAPbI(3) NP-seeded growth of MAPbI(3) NPs/CsFAMA-based PSCs is as high as 19.44%, which is superior to those of MAPbI(3) NPs and pristine CsFAMA films as the photoactive layer (9.52 and 17.33%, respectively). The long-term light-soaking and moisture stability of IL-aided MAPbI(3) NPs/CsFAMA-based devices (non-encapsulated) remain above 90 and 80%, respectively, of their initial output after 2 h of light illumination (1 sun) and 6000 h storage at ambient with a relative humidity range of 30-40%. The use of the IL-assisted MAPbI(3) NP-seeded growth for PSCs is a significant step toward developing stable and reliable perovskite photovoltaic devices.
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