基于吡咯并吡咯二酮-芴骨架的新型有机小分子光伏材料的设计合成与性能调控
Design,synthesis and properties of novel organic small molecule photovoltaic materials based on diketopyrrolopyrrole-fluorene
王旭 1殷伦祥 1李艳芹1
作者信息
- 1. 大连理工大学化学学院,辽宁大连 116024
- 折叠
摘要
设计合成了 2种基于吡咯并吡咯二酮-芴骨架的新型有机小分子给体材料(FLU)2TDPP和(DFLU)2TDPP,并探究了其光吸收性质、电化学性质及光伏性能.首先,采用吡咯并吡咯二酮作为中心吸电子单元,芴作为端基给电子单元,构筑了 D-π-A-π-D型分子(FLU)2TDPP.在此基础上,延长分子骨架,在端基芴上引入二苯胺,构筑了 D-D-π-A-π-D-D型分子(DFLU)2TDPP.首先将"给电子单元-π桥"("D-π")片段制备成有机锡中间体,再与吡咯并吡咯二酮溴代物经一步Stille反应得到目标分子.(FLU)2TDPP和(DFLU)2TDPP均具有较窄的能隙,分别为1.71和1.64 eV.其中,基于(DFLU)2TDPP的光伏器件由于材料良好的光吸收及窄能隙特性而显示出更优异的光伏性能,获得了最高2.27％的能量转化效率,表明骨架延长策略是拓宽分子吸收范围、提升器件性能的一种有效策略.
Abstract
Two novel organic small molecule donor materials(FLU)2TDPP and(DFLU)2TDPP based on diketopyrrolopyrrole-fluorene were designed and synthesized successfully.The D-D-π-A-π-D-D type mole-cule(DFLU)2TDPP was constructed based on the D-π-A-π-D type molecule(FLU)2TDPP by a backbone extension strategy.The optical absorption,electrochemistry and photovoltaic properties of the two novel materials were investigated in detail.Both(FLU)2TDPP and(DFLU)2TDPP show narrow energy gaps of 1.71 and 1.64 eV,respectively.Compared to(FLU)2TDPP,the photovoltaic device based on(DFLU)2TDPP/PC71BM exhibited a higher power conversion efficiency of 2.27％due to its excellent opti-cal absorption,narrow band gap and balanced carrier mobility.This study indicates that skeleton exten-sion strategy is an effective strategy to broaden the molecular absorption range and improve device per-formance.
关键词
有机光伏材料/有机小分子/芴/吡咯并吡咯二酮/骨架延长Key words
organic photovoltaic material/organic small molecule/fluorene/diketopyrrolopyrrole/skeleton extension引用本文复制引用
基金项目
National Natural Science Foundation of China(21102013)
Fundamental Research Funds for the Central Universities(DUT16ZD205)
出版年
2024
NETL
NSTL
万方数据