Electric-field assisted perovskite crystallization for high-performance solar cells. Issue 3 (2nd January 2018)

• Record Type: Journal Article
• Authors: Zhang, Cong-Cong; Wang, Zhao-Kui; Li, Meng; Liu, Zhi-Yong; Yang, Ji-En; Yang, Ying-Guo; Gao, Xing-Yu; Ma, Heng
• Is Part Of: Journal of materials chemistry. Volume 6:Issue 3(2018)
• Page Start: 1161
• Page End: 1170
• Publication Date: 2018-01-02
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c7ta08204e
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : We develop an external-electric-field (EEF)-assisted annealing treatment to improve the photoelectric performance of planar organic–inorganic perovskite solar cells (PSCs). Abstract : We develop an external-electric-field (EEF)-assisted annealing treatment to improve the photoelectric performance of planar organic–inorganic perovskite solar cells (PSCs). The new strategy can control the ion polarization orientation of perovskite films to obtain a good crystallization film and enhance the built-in electric field (BIF), which facilitates the effective promotion of charge separation and transport. Under an optimized treatment of up-EEF-assisted (2.5 V μm −1 ) annealing, the power conversion efficiency (PCE) of the inverted PSC is improved from 15.33% to 17.26%, and from 16.77% to 19.18% for regular PSCs, compared with the thermal-annealing-only process. The ion polarization and ferroelectricity in the perovskite layer induced by the EEF are intensively discussed. The finding in this work provides a new route to improve perovskite film quality and cell performance.