Polymer assisted growth of high-quality perovskite films by Lewis acid-base adduct for efficient planar-heterojunction solar cells
- Department of Microelectronic Science and Engineering, Ningbo Collabrative Innovation Center of Nonlinear Hazard System of Ocean and Atmosphere, Ningbo University, Ningbo, 315211 (China)
- College of Electronic Information and Optical Engineering, Nankai University, Tianjin, 300071 (China)
Highlights: • Polymer assisted growth of high-quality perovskite films was demonstrated. • Polymer PMMA can retard nucleation and crystal growth of perovskite. • The interaction between the perovskite films and PMMA was addressed. • Planar-heterojunction solar cells with efficiencies of 15% were achieved. - Abstract: Long-chain insulating polymers dissolved in perovskite precursor solution can assemble the polymer scaffold acted as the function of TiO{sub 2} porous layer to improve the quality of the perovskite films. Here, perovskite films with high electronic quality were prepared by mediating nucleation and crystal growth. Polymer post treatment can induce Lewis acid-base reaction with PbCl{sub 2}, which alleviates the reaction velocity between PbCl{sub 2} and CH{sub 3}NH{sub 3}I, and then retard perovskite crystallization. The interactions between the perovskite films and polymer with different concentration are addressed to interpret the function and evolution of the polymer long-chains during the annealing process. These solar cells exhibit efficiency more than 15% with small variation. Our work demonstrates the value of retarding nucleation and crystal growth by Lewis acid-base adducts for high-quality perovskite films.
- OSTI ID:
- 22730450
- Journal Information:
- Materials Research Bulletin, Vol. 95; Other Information: Copyright (c) 2017 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
- Country of Publication:
- United States
- Language:
- English
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