Tandem organic solar cells with efficiency over 19% via the careful subcell design and optimization  

作　　者：Lingxian Meng Huazhe Liang Guangkun Song Mingpeng Li Yuzhong Huang Changzun Jiang Kai Zhang Fei Huang Zhaoyang Yao Chenxi Li Xiangjian Wan Yongsheng Chen 

机构地区：[1]State Key Laboratory and Institute of Elemento-Organic Chemistry,Centre of Nanoscale Science and Technology and Key Laboratory of Functional Polymer Materials,College of Chemistry,Nankai University,Tianjin 300071,China [2]State Key Laboratory of Luminescent Materials and Devices,South China University of Technology,Guangzhou 510640,China

出　　处：《Science China Chemistry》2023年第3期808-815,共8页中国科学（化学英文版）

基　　金：supported by the National Natural Science Foundation of China(52025033,21935007);the Ministry of Science and Technology of China(2022YFB4200400,2019YFA0705900);the Tianjin City(20JCZDJC00740);111 Project(B12015)

摘　　要：The series-connected tandem device strategy is an effective approach to promote the efficiency of organic solar cells(OSCs) with broadened absorption range and alleviated thermalization and transmission loss.In this article,two nonfullerene acceptors,FB rThCl and BTP-4Se,with complementary absorptions covering the range from 300 to 1,000 nm were designed and synthesized for the front and rear cell,respectively.The front cell based on D18:FBr-ThCl exhibited a Voc of 1.053 V with high external quantum efficiency(EQE) response values ranging from 300 to 740 nm.The rear cell with a ternary active layer PM6:BTP-4 Se:F-2F was optimized and afforded the Voc of 0.840 V and Jsc of 26.88 mA cm^(-2).Subsequently,the tandem device was constructed with a fully solution-processed interconnected layer of ZnO/PEDOT:PS S/PMA,and demonstrated a power conversion efficiency(PCE) of 19.55% with a Voc of 1.880 V,a Jsc of 13.25 mA cm^(-2) and an FF of 78.47%.

关 键 词：tandem device organic solar cells front cell rear cell power conversion efficiency 

分 类 号：TM914.4[电气工程—电力电子与电力传动]