Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 11, Issue 8, Pages 7639-7654Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.8b16315
Keywords
solution-proceed technique; solvent; perovskite film; crystallization; growth mechanism
Funding
- National Natural Science Foundation of China [51472019]
- Tsinghua University Initiative Scientific Research Program [20161080165]
- Open Research Fund Program of the State Key Laboratory of Low -Dimensional Quantum Physics [KF201704]
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Recently, perovskite solar cells have attracted great attention because of their outstanding photovoltaic performance and ease of fabrication. High-quality perovskite films hold a key in getting highly efficient perovskite solar cells. Solution-processed fabrication technique is the most widely adopted for preparing perovskite films because of its low cost. In the solution-proceed perovskite films, solvents not only play the role of dissolving the solute but also participate in the crystallization of perovskite. In the one-step method, solvents play key roles in controlling morphology, widening process window, and achieving room-temperature crystallization of perovskite films. In addition, the solvents play important roles in controlling the nuclei/growth, suppressing volume expansion during the two-step method. Especially, the solvent can induce grain coarsening during the annealing process. A deep understanding of the multiplicity of roles during the formation of perovskite films will help understand the formation mechanism of perovskite films. Here, a systematic review on the progress in fabrication of high-quality perovskite films by making use of solvent to control the crystallization is presented. Meanwhile, we elucidate the key roles of solvent in the fabrication of high-quality perovskite films.
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