Haoyu Liu , Tong Shan , Na Yu , Nan Zheng , Liping Zhu , Zaifei Ma , Meifang Zhu
{"title":"Suppress energy loss to boost power conversion efficiency of organic photovoltaics with linear side chains modulation","authors":"Haoyu Liu , Tong Shan , Na Yu , Nan Zheng , Liping Zhu , Zaifei Ma , Meifang Zhu","doi":"10.1016/j.orgel.2024.107019","DOIUrl":null,"url":null,"abstract":"<div><p>The high energy loss (<em>E</em><sub>loss</sub>) in organic solar cells (OSCs) is being the one of major problem, which limit the power conversion efficiency (PCE) of OSCs. In this work, we designed and synthesized three perylene diimide (PDI)-based Acceptor’-Donor-Acceptor-Donor- Acceptor’ (A′-DAD-A′) small molecules namely <em>anti</em>-PDFC-Cx (C8, C10, and C12) by changing the length of linear chains on IDT cores to investigate how the length of linear side chain affects <em>E</em><sub>loss</sub> and the power conversion efficiencies (PCEs) of OSCs. The optical energy bandgap and stacking mode for three <em>anti</em>-PDFC-Cx (C8, C10, and C12) remain the same, which were not influenced by the different lengths of side chains. Increasing the length of side chains on IDT cores from C8 to C10 and C12 would improve the PCE of PM6: <em>anti</em>-PDFC-Cx based devices from 11.52% to 12.43% and 12.27%, particularly the <em>V</em><sub>oc</sub> increasing from 0.98 V of <em>anti</em>-PDFC-C8 and 1.00 V of <em>anti</em>-PDFC-C10 to 1.02 V of <em>anti</em>-PDFC-C12. <em>E</em><sub>loss</sub> analysis indicated the value of <em>E</em><sub>loss</sub> reduced as the length increases from C8, to C12. These results demonstate linear side chain engineer is an effective method to reduce <em>E</em><sub>loss</sub> and realize high PCE on the bases of not modulating the stacking mode of acceptor.</p></div>","PeriodicalId":399,"journal":{"name":"Organic Electronics","volume":null,"pages":null},"PeriodicalIF":2.7000,"publicationDate":"2024-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Organic Electronics","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1566119924000302","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
The high energy loss (Eloss) in organic solar cells (OSCs) is being the one of major problem, which limit the power conversion efficiency (PCE) of OSCs. In this work, we designed and synthesized three perylene diimide (PDI)-based Acceptor’-Donor-Acceptor-Donor- Acceptor’ (A′-DAD-A′) small molecules namely anti-PDFC-Cx (C8, C10, and C12) by changing the length of linear chains on IDT cores to investigate how the length of linear side chain affects Eloss and the power conversion efficiencies (PCEs) of OSCs. The optical energy bandgap and stacking mode for three anti-PDFC-Cx (C8, C10, and C12) remain the same, which were not influenced by the different lengths of side chains. Increasing the length of side chains on IDT cores from C8 to C10 and C12 would improve the PCE of PM6: anti-PDFC-Cx based devices from 11.52% to 12.43% and 12.27%, particularly the Voc increasing from 0.98 V of anti-PDFC-C8 and 1.00 V of anti-PDFC-C10 to 1.02 V of anti-PDFC-C12. Eloss analysis indicated the value of Eloss reduced as the length increases from C8, to C12. These results demonstate linear side chain engineer is an effective method to reduce Eloss and realize high PCE on the bases of not modulating the stacking mode of acceptor.
期刊介绍:
Organic Electronics is a journal whose primary interdisciplinary focus is on materials and phenomena related to organic devices such as light emitting diodes, thin film transistors, photovoltaic cells, sensors, memories, etc.
Papers suitable for publication in this journal cover such topics as photoconductive and electronic properties of organic materials, thin film structures and characterization in the context of organic devices, charge and exciton transport, organic electronic and optoelectronic devices.