Bendable and foldable flexible organic solar cells based on Ag nanowire films with 10.30% efficiency. Issue 8 (30th January 2019)

• Record Type: Journal Article
• Authors: Lei, Tao; Peng, Ruixiang; Song, Wei; Hong, Ling; Huang, Jiaming; Fei, Nannan; Ge, Ziyi
• Is Part Of: Journal of materials chemistry. Volume 7:Issue 8(2019)
• Page Start: 3737
• Page End: 3744
• Publication Date: 2019-01-30
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c8ta11293b
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : Flexible organic solar cells (FOSCs) were fabricated based on Ag nanowire/PET films with PEDOT:PSS composite electrodes. The influence of doping PH1000 with ethylene glycol on the photovoltaic performance has also been investigated. Optimum FOSCs exhibit a PCE of 10.30%. All the FOSCs show excellent flexibility after bending and even upon total folding. Abstract : For their wide applications in wearable devices, flexible organic solar cells (FOSCs) should have high power conversion efficiency (PCE), bendable and even foldable flexibility, and low fabrication cost. Herein, all-solution-processed FOSCs based on flexible hybrid transparent electrodes (FTE) of Ag nanowires (NWs) combined with PEDOT:PSS PH1000 doped with a small amount of ethylene glycol (EG) were fabricated. The photovoltaic performance of FOSCs is closely related to the substrate and the content of EG. The optimal content of 6 vol% EG doped in PH1000 has a positive effect on electrical conductivity, surface morphology and even flexibility. These FOSCs yield the best PCE of 10.30% with a short-circuit current density of 19.17 mA cm −2 under optimal condition, which represent the highest efficiency reported to date for FOSCs with Ag NW electrodes. Furthermore, the optimal FOSCs demonstrate excellent mechanical flexibility, which can retain around 90% of the original PCE after 1000 bending cycles and exhibit over 75% of the original PCE even after complete folding. Our results demonstrate a new avenue to fabricate efficient and robust FOSCs with promising application potentials.