Semitransparent organic solar cells with high light utilization efficiency and color rendering index  

作　　者：Ni Gao Haijun Bin Shangrong Wu RenéA.J.Janssen Yongfang Li 

机构地区：[1]Laboratory of Advanced Optoelectronic Materials,Suzhou Key Laboratory of Novel Semiconductor Materials and Devices,College of Chemistry,Chemical Engineering and Materials Science,Soochow University,Suzhou 215123,China [2]Jiangsu Key Laboratory of Advanced Negative Carbon Technologies,Soochow University,Suzhou 215123,China [3]Molecular Materials and Nanosystems&Institute for Complex Molecular Systems,Eindhoven University of Technology,Eindhoven 5600 MB,the Netherlands

出　　处：《Science China Chemistry》2024年第7期2248-2256,共9页中国科学（化学英文版）

基　　金：financially supported from the National Natural Science Foundation of China(5220235);academic funding supported by Soochow University(NH10900123);the Gusu Innovation and Entrepreneurship Leading Talents Program(ZXL2023184);the Natural Science Foundation of Jiangsu Higher Education Institutions of China(22KJB150033)。

摘　　要：Semitransparent organic solar cells(ST-OSCs)have garnered considerable attention as promising renewable energy technology for integrating photovoltaics into buildings.However,there is a trade-off between power conversion efficiency(PCE)and average visible transmittance(AVT),which hinders the achievement of a high light utilization efficiency(LUE).In this study,we propose a valuable method to address this challenge by replacing the transparent top electrode,Ag,with a 20 nm layer of Au.The ST-OSCs based on the 20 nm Au electrode demonstrate superior exciton extraction,more efficient charge collection,and higher color-rendering index(CRI)due to their smoother surface,higher conductivity,and enhanced visible light transmittance,resulting in a significantly higher PCE of 13.67%and an enhanced AVT of 30.17%,contributing to a high LUE of 4.15%.Additionally,optically transparent dielectric layers,applied on the front and back sides of the ST-OSCs to further boost performance,delivered an impressive LUE of 4.93%,with PCE and AVT values reaching 14.44%and 34.12%,respectively.Notably,the champion ST-OSCs also exhibited a favorable CRI value of 93.37.These achievements represent the bestperforming ST-OSCs to date with both high LUE and CRI and hold significant implications for the prospective commercialization of ST-OSCs.

关 键 词：semitransparent organic solar cells power conversion efficiency average visible transmittance light utilization efficiency color-rendering index 

分 类 号：TM914.4[电气工程—电力电子与电力传动]