Journal
SOLAR ENERGY
Volume 122, Issue -, Pages 97-103Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.solener.2015.08.028
Keywords
Perovskite; Solar cells; Reproducibility; Sequential solution deposition process
Categories
Funding
- National High-tech R&D Program of China (863 Program) [2015AA034601]
- National Natural Science Foundation of China [91333122, 51402106, 51372082, 51172069, 61204064, 51202067]
- Ministry of Education of China [20120036120006, 20130036110012]
- Par-Eu Scholars Program
- Fundamental Research Funds for the Central Universities
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The controllability of conditions and parameters, in a certain procedure that adopted to prepare perovskite absorption layer, play a crucial role in morphology and crystallization of the resulting films, which is of great impact on the reproducibility of solar cells. Here we propose a complete spin-coating sequential solution deposition (spinning-SSD) process, in which a high concentration CH3NH3I precursor was spin-coated on PbI2-coated substrate insteading of immersing procedure; the pristine isopropanol was spin-coated to ameliorate the surface morphology and improve the quality of the resulting CH3NH3PbI3 films both before and after the spin-coating of CH3NH3I solution. Utilizing this spinning-SSD process, we fabricated meso-structured perovskite solar cells, and these devices exhibited decent performance and high reproducibility, achieving an average power conversion efficiency of 11.3% with the standard deviation as low as +/- 0.52. This optimized approach is expected to be used for fabricating high-performance perovskites solar cells with a full printable process. (C) 2015 Elsevier Ltd. All rights reserved.
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