期刊
SOLAR ENERGY MATERIALS AND SOLAR CELLS
卷 184, 期 -, 页码 15-21出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.solmat.2018.04.032
关键词
Perovskite solar cell; Cs3Bi2I9 nanosheets; Ultrathin; Stable
资金
- National Natural Science Foundation of China [21403112]
- Fundamental Research Funds for the Central Universities [3091501333]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- Postgraduate Research & Practice Innovation Program of Jiangsu Province
- Natural Science Foundation of Hubei Province of China [2017CFB526]
- Educational Commission of Hubei Province of China [D20172803]
Organometallic halide perovskite materials have attracted great attention in the past few years owing to their excellent optical properties and solution-processable fabrication. However, the further development of these lead-based materials is restricted by the toxic heavy-metal element Pb. Herein, we present a dissolution-re crystallization method to fabricate high-quality lead-free Cs3Bi2I9 perovskite nanosheets film and further explore its potential application in solar cells with three different kinds of hole transport materials. The solar cells based on ultrathin Cs3Bi2I9 nanosheets show remarkable improvement in the photovoltaic performance and a high power conversion efficiency of 3.20% has been achieved in the solar cell with CuI as the hole transport material, which is the highest efficiency value of Bi-based perovskite solar cells that has been reported so far. The Cs3Bi2I9 nanosheets based solar cell with CuI also showed a long-term stability in ambient air. These encouraging results of our work demonstrate the possibility of further improvement of the performance of lead-free perovskite solar cells.
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