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Synthesis and photovoltaic performance of DPP-based small molecules with tunable energy levels by altering the molecular terminals
Yu, Delong1; Liu, Yu1; Xiao, Manjun1; Fan, Qunping1; Su, Wenyan1; Li, Xiao1; Tan, Hua1; Wang, Yafei1; Yang, Renqiang2; Zhu, Weiguo1
2016-02-01
Source PublicationDYES AND PIGMENTS
Volume125Issue:1Pages:151-158
Abstract

Four novel small molecules, Ph(DPP-Th)(2), Ph(DPP-Py)(2), Ph(DPP-ThCN)(2) and Ph(DPP-ThR)(2) were synthesized and characterized, in which diketopyrrolopyrrole-phenyl-diketopyrrolopyrrole was used as the core, donor units of 2-octylthiophene (Th), pyrene (Py), acceptor units octyl 2-cyano-3-(thiophen-2-yl)acrylate (ThCN) and 3-octyl-5-(thiophen-2-ylmethylene)rodanine (ThR) were used as the terminals, respectively. By changing the terminals of small molecules, their corresponding thermal, absorptive, electro-chemical and photovoltaic properties were rationally adjusted for applications as donor materials in organic solar cells (OSCs). All of small molecules exhibit broad absorption spectra from the visible to near-infrared region, and Ph(DPP-ThR)(2) showed the minimum optical band gap of 1.48 eV. The small molecules with acceptor terminal units had much deeper HOMO energy levels than those with donor terminal units, which is important to increase the open-circuit voltage (V-oc). A maximum power conversion efficiency of 3.22%, short-circuit current density of 10.55 mA cm(-2), V-oc of 0.85 V, and fill factor of 39% were obtained in the Ph(DPP-Py)(2)/PC71BM based cells under AM 1.5 G irradiation (100 mW cm(-1)). These results demonstrate valuable guidelines for the rational design of solution-processed small molecules for OSCs. (C) 2015 Elsevier Ltd. All rights reserved.

SubtypeArticle
KeywordOrganic Solar Cells Small Molecules Bulk-heterojunction Diketopyrrolopyrrole Pyrene Rodanine
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
DOI10.1016/j.dyepig.2015.10.006
WOS KeywordORGANIC SOLAR-CELLS ; POWER CONVERSION EFFICIENCY ; DIKETOPYRROLOPYRROLE-BASED OLIGOMERS ; END-GROUPS ; POLYMER ; PYRENE ; BENZODITHIOPHENE ; TRANSISTORS ; NAPHTHALENE ; TERPOLYMERS
Indexed BySCI
Language英语
WOS Research AreaChemistry ; Engineering ; Materials Science
Funding OrganizationMajor Cultivation and General Programs of National Natural Science Foundation of China(51573154 ; Program for Innovative Research Cultivation Team in University of Ministry of Education of China(1337304) ; Innovation Group in Hunan Natural Science Foundation(12JJ7002) ; Natural Science Foundation of Hunan(14JJ4019 ; Open Project for the National Key Laboratory of Luminescent Materials and Devices(2014-skllmd-10) ; Research Foundation of Hunan Education Bureau(13A102 ; 91233112 ; 2015JJ3113) ; 14C1099) ; 21172187 ; 51403178)
WOS SubjectChemistry, Applied ; Engineering, Chemical ; Materials Science, Textiles
WOS IDWOS:000367777100020
Citation statistics
Cited Times:15[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.qibebt.ac.cn/handle/337004/7912
Collection先进有机功能材料团队
Affiliation1.Xiangtan Univ, Coll Chem, Key Lab Environm Friendly Chem & Applicat, Minist Educ, Xiangtan 411105, Peoples R China
2.Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, Qingdao 266101, Peoples R China
Recommended Citation
GB/T 7714
Yu, Delong,Liu, Yu,Xiao, Manjun,et al. Synthesis and photovoltaic performance of DPP-based small molecules with tunable energy levels by altering the molecular terminals[J]. DYES AND PIGMENTS,2016,125(1):151-158.
APA Yu, Delong.,Liu, Yu.,Xiao, Manjun.,Fan, Qunping.,Su, Wenyan.,...&Zhu, Weiguo.(2016).Synthesis and photovoltaic performance of DPP-based small molecules with tunable energy levels by altering the molecular terminals.DYES AND PIGMENTS,125(1),151-158.
MLA Yu, Delong,et al."Synthesis and photovoltaic performance of DPP-based small molecules with tunable energy levels by altering the molecular terminals".DYES AND PIGMENTS 125.1(2016):151-158.
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