Integration of Conjugated Copolymers-Based Luminescent Solar Concentrators with Excellent Color Rendering and Organic Photovoltaics for Efficiently Converting Light to Electricity

摘要

Luminescent solar concentrators (LSCs) provide a simple and cost-effectivestrategy for harvesting sunlight. However, few existing LSC–solar cell systemspossess power conversion efficiency (PCE) and remarkable color renderingcapability simultaneously, which limits their application in building-integratedphotovoltaics (BIPV). Herein, for the first time, novel LSC–solar cell systemsfabricated by integrating LSCs with organic solar cells (OSCs), accompaniedwith efficient solar energy harvest and excellent color rendering, are reported.Three conjugated copolymers, PPF-IF, PPF-NIF, and PPF-F are utilized as theluminophores to construct LSCs with ultrahigh color rendering indices (95.74),and the OSCs based on these systems present high PCEs (4.92) under 1 sunconditions. With the decrease of the light intensity, the PCEs of the OSCs keeprising and reach a high value of 14.91 (11 mW cm~(?2)). In contrast, the crystallinesilicon (C–Si) cell-based systems show low PCE values ranging from1.90 to 2.47, and especially, the PCEs are not highly correlated with theillumination intensity. These results indicate that the utilization of conjugatedcopolymers as luminophores can enable LSC to possess high efficiency andexcellent color rendering ability, and the integration of OSCs with LSC is a verypromising strategy for future practical applications in BIPV, etc.