Fully-solution-processed organic solar cells with a highly efficient paper-based light trapping element. Issue 48 (24th November 2015)

• Record Type: Journal Article
• Authors: Tang, Zheng; Elfwing, Anders; Melianas, Armantas; Bergqvist, Jonas; Bao, Qinye; Inganäs, Olle
• Is Part Of: Journal of materials chemistry. Volume 3:Issue 48(2015)
• Page Start: 24289
• Page End: 24296
• Publication Date: 2015-11-24
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c5ta07154b
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : We report an efficient paper based light trapping element for fully-solution-processed semi-transparent photovoltaic devices with PEDOT:PSS as both electrodes. Abstract : We demonstrate the use of low cost paper as an efficient light-trapping element for thin film photovoltaics. We verify its use in fully-solution processed organic photovoltaic devices with the highest power conversion efficiency and the lowest internal electrical losses reported so far, the architecture of which – unlike most of the studied geometries to date – is suitable for upscaling, i.e. commercialization. The use of the paper-reflector enhances the external quantum efficiency (EQE) of the organic photovoltaic device by a factor of ≈1.5–2.5 over the solar spectrum, which rivals the light harvesting efficiency of a highly-reflective but also considerably more expensive silver mirror back-reflector. Moreover, by detailed theoretical and experimental analysis, we show that further improvements in the photovoltaic performance of organic solar cells employing PEDOT:PSS as both electrodes rely on the future development of high-conductivity and high-transmittance PEDOT:PSS. This is due optical losses in the PEDOT:PSS electrodes.