Development of multidye UV filters for OPVs using luminescent materials. (30th November 2016)

• Record Type: Journal Article
• Authors: Fernandes, Ricardo Vignoto; Bristow, Noel; Stoichkov, Vasil; Anizelli, Helder Scapin; Duarte, José Leonil; Laureto, Edson; Kettle, Jeff
• Is Part Of: Journal of physics. Volume 50:Number 2(2017)
• Publication Date: 2016-11-30
• Subjects: organic photovoltaics -- stability -- luminescent down-shifting -- external quantum efficiency; Physics -- Periodicals; 530
• DOI: 10.1088/1361-6463/50/2/025103
• Languages: English
• ISSNs: 0022-3727

Abstract

Abstract: Luminescence down-shifting (LDS) is used in several photovoltaic technologies aiming to improve the photon conversion efficiency (PCE) of the devices through the increase of the light harvesting in the regions of the electromagnetic spectrum where the EQE of the solar cells is poor. The aim of this work was to produce films of mixtures (blends) of two luminescent materials, dispersed in a poly-methyl methacrylate (PMMA) matrix, hoping to improve their properties both as LDS layer and as UV filter when applied on the clear, external surface of P3HT:PC61 BM photovoltaic devices. The best results led to an increment of 7.4% in the PCE of the devices, and a six fold enhancement in their half-life ( T 50% ). This study indicates that multidye LDS layers with optimized optical properties can lead to an effective improvement in the performance and operational stability of OPVs.