Enhancement in the photovoltaic performance of planar perovskite solar cells by perovskite cluster engineering using an interfacial energy modifier. Issue 7 (1st February 2019)

• Record Type: Journal Article
• Authors: Li, Bichen; Chen, Zhihui; Yao, Hongyan; Guan, Xin; Yu, Zhimeng; Halis Isikgor, Furkan; Coskun, Hikmet; Xu, Qing-Hua; Ouyang, Jianyong
• Is Part Of: Nanoscale. Volume 11:Issue 7(2019)
• Page Start: 3216
• Page End: 3221
• Publication Date: 2019-02-01
• Subjects: Nanoscience -- Periodicals; Nanotechnology -- Periodicals; 620.505
• DOI: 10.1039/c8nr10125f
• Languages: English
• ISSNs: 2040-3364

Abstract

Abstract : Perovskite solar cells with an efficiency of 19.50% are fabricated by increasing the cluster/solution interfacial energy. Abstract : The grain size and quality of hybrid organic–inorganic perovskite (HOIP) films greatly affect the performance of perovskite solar cells (PSCs). However, dripping an anti-solvent during the spin coating process induces rapid nucleation and reduces the grain size. Here, a facile method is developed to engineer clusters in precursor solution and obtain high-quality perovskite films with an enlarged grain size. A cluster interfacial modifier, chlorobenzene (CB), is added to precursor solution. The modifier increases the interfacial energy between the precursor cluster and the solvent. The increased interfacial energy suppresses the nucleation and gives rise to HOIP films with large grains and high crystallinity. The efficiency of PSCs based on this method is greatly improved from 17.55% to 19.5%.