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Intra- and Intermolecular Steric Hindrance Effects Induced Higher Open-Circuit Voltage and Power Conversion Efficiency
Han, Liangliang1; Chen, Weichao1; Hu, Tong2; Ren, Junzhen2; Qiu, Meng1; Zhou, Yuanhang1; Zhu, Dangqiang1; Wang, Ning1; Sun, Mingliang2; Yang, Renqiang1,3
2015-04-01
Source PublicationACS Macro Letters
Volume4Issue:4Pages:361-366
Abstract

A pair of donor acceptor polymers PBDThDTBT and PBDTchDTBT are synthesized, which share the same conjugated backbone, but are designed with hexyl and cyclohexyl side chains, respectively. The stronger steric hindrance of cyclohexyl endows PBDTchDTBT a deeper lying HOMO energy level of -5.39 eV compared to -5.22 eV for PBDThDTBT. However, PBDThDTBT and PBDTchDTBT exhibit a similar optical bandgap around 1.72 eV and a hole mobility around 10(-5) cm(2)V(-1) s(-1). Interestingly, the PBDTchDTBT/PC71BM blends exhibited higher hole mobility than PBDThDTBT/PC71BM after DIO was added. The higher hole mobility and fibrillar network in the active layer endows PBDTchDTBT higher power conversion efficiency of 7.9%, together with simultaneously improved open-circuit voltage of 0.80 V, short-circuit current density of 13.50 mA cm(-2), and fill factor of 72.74% after a systemic study of their solar cell devices.

SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1021/acsmacrolett.5b00052
WOS KeywordPOLYMER SOLAR-CELLS ; LIGHT-EMITTING-DIODES ; CONJUGATED POLYMERS ; FLUORINATED BENZOTHIADIAZOLE ; PROCESSING ADDITIVES ; QUANTUM EFFICIENCY ; MOLECULAR-WEIGHT ; PERFORMANCE ; DESIGN ; ELECTROLUMINESCENCE
Indexed BySCI
Language英语
WOS Research AreaPolymer Science
WOS SubjectPolymer Science
WOS IDWOS:000353437000006
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Document Type期刊论文
Identifierhttp://ir.qibebt.ac.cn/handle/337004/6433
Collection先进有机功能材料研究组
Affiliation1.Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, CAS Key Lab Biobased Mat, Qingdao 266101, Peoples R China
2.Ocean Univ China, Inst Mat Sci & Engn, Qingdao 266100, Peoples R China
3.S China Univ Technol, State Key Lab Luminescent Mat & Devices, Guangzhou 510641, Guangdong, Peoples R China
Recommended Citation
GB/T 7714
Han, Liangliang,Chen, Weichao,Hu, Tong,et al. Intra- and Intermolecular Steric Hindrance Effects Induced Higher Open-Circuit Voltage and Power Conversion Efficiency[J]. ACS Macro Letters,2015,4(4):361-366.
APA Han, Liangliang.,Chen, Weichao.,Hu, Tong.,Ren, Junzhen.,Qiu, Meng.,...&Yang, Renqiang.(2015).Intra- and Intermolecular Steric Hindrance Effects Induced Higher Open-Circuit Voltage and Power Conversion Efficiency.ACS Macro Letters,4(4),361-366.
MLA Han, Liangliang,et al."Intra- and Intermolecular Steric Hindrance Effects Induced Higher Open-Circuit Voltage and Power Conversion Efficiency".ACS Macro Letters 4.4(2015):361-366.
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