二元体
有机太阳能电池
光伏
接受者
材料科学
纳米技术
光伏系统
物理
心理学
工程类
电气工程
聚合物
社会心理学
凝聚态物理
复合材料
作者
Yuan Gao,Wei Wang,Shuwei Li,Mingxia Chen,Xinrong Yang,Yiming Shao,Rui Sun,Jie Min
标识
DOI:10.1002/solr.202400138
摘要
Single molecular organic photovoltaics (SMOPVs), which are based on monadic systems containing donor (D) and acceptor (A) molecule blocks that facilitate exciton dissociation, offer obvious advantages over binary or multi‐component bulk‐heterojunction (BHJ) systems, including simplified cell fabrication, stabilized morphology of the D/A interface, and extended device operation lifetime. However, limited by the development of A blocks, the power conversion efficiency (PCE, ∽5%) of SMOPVs based on molecular D‐A dyads still lags conventional BHJ OPVs (over 19%). Herein, by introducing a narrow bandgap A‐DA’D‐A conjugated backbone as the A‐block, combined with the linear D‐block BDT‐3T‐R and flexible alkyl chain linker, we designed and developed two molecular dyads, SM‐1Y (one D‐block and one A‐block) and SM‐2Y (one D‐block and two A‐blocks). Owing to superior absorption spectra and better molecular stacking compared to SY‐1Y, SM‐2Y‐based SMOPV delivers a PCE of 8.13%, which is the highest value in the SMOPV reported thus far. Note that both SM‐1Y and SM‐2Y devices showed much better storage and photostability stability as compared to the control BDT‐3T‐C6:Y18‐C3 binary system. This article is protected by copyright. All rights reserved.
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