Polystyrene enhanced crystallization of perovskites towards high performance solar cells.

Autor: Kim HP; Advanced Display Research Center, Department of Information Display, Kyung Hee University Dongdaemoon-gu Seoul 130-701 South Korea hpkim@khu.ac.kr jjang@khu.ac.kr., Bin Mohd Yusoff AR; Department of Materials Science & Engineering, Yonsei University Seoul 03722 South Korea abdr@yonsei.ac.kr., Jang J; Advanced Display Research Center, Department of Information Display, Kyung Hee University Dongdaemoon-gu Seoul 130-701 South Korea hpkim@khu.ac.kr jjang@khu.ac.kr.
Jazyk: angličtina
Zdroj: Nanoscale advances [Nanoscale Adv] 2018 Aug 29; Vol. 1 (1), pp. 76-85. Date of Electronic Publication: 2018 Aug 29 (Print Publication: 2019).
DOI: 10.1039/c8na00052b
Abstrakt: Perovskite solar cells have attracted significant attention due to their high efficiency and low cost. In the research on methylammonium lead-iodide (CH 3 NH 3 PbI 3 ), a lot of work has been devoted to optimize the film morphology and crystallinity resulting in an enhancement of the power conversion efficiency (PCE). A good surface coverage and uniform perovskite films are highly desirable along with a smooth and pinhole-free contact between the hole and electron extraction layers. Overall, this affects the charge transport and collection, and reduces charge recombination. Herein, we demonstrate a facile route to control perovskite crystallization by inserting an optimal amount of insulating polystyrene in the perovskite precursor solutions. The incorporation of a small amount of polystyrene results in much better surface coverage, and a smoother and uniform perovskite thin film leading to improved crystallization and larger grain size. Via careful optimization, and easy and low temperature solution-based processing, below 100 °C, we realize a device with PCE exceeding 13% along with significantly reduced leakage current.
Competing Interests: There are no conflicts to declare.
(This journal is © The Royal Society of Chemistry.)
Databáze: MEDLINE