Linkage effects of linear D–π–A–π–D type diketopyrrolopyrrole-triphenylamine based solution-processable organic small molecule photovoltaic materials

Four novel D- pi -A- pi -D-type small molecules (SMs) were synthesized and their pi -linkage effects were investigated. Among them, SM2 with vinylene as the pi -linkage exhibited better molecular coplanarity, reaching a relatively higher power conversion efficiency (PCE) of 3.76%. SM3 and SM4 with a...

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Published inJournal of materials chemistry. C, Materials for optical and electronic devices Vol. 2; no. 20; pp. 4019 - 4026
Main Authors Ji, Changyan, Yin, Lunxiang, Wang, Lihui, Jia, Tao, Meng, Shixiang, Sun, Yingji, Li, Yanqin
Format Journal Article
LanguageEnglish
Published 01.01.2014
Subjects
Acetylene
Acrylonitriles
Coplanarity
Electric potential
Energy conversion efficiency
Photovoltaic cells
Solar cells
Voltage
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Summary:Four novel D- pi -A- pi -D-type small molecules (SMs) were synthesized and their pi -linkage effects were investigated. Among them, SM2 with vinylene as the pi -linkage exhibited better molecular coplanarity, reaching a relatively higher power conversion efficiency (PCE) of 3.76%. SM3 and SM4 with acetylene and acrylonitrile as pi -linkages exhibited relatively higher open-circuit voltages (V sub(OC)) of 0.93 V and 0.90 V, respectively, owing to their deep-lying HOMO levels. These results gave an important guide for developing new materials in solution-processed small molecule solar cells.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:2050-7526
2050-7534
DOI:10.1039/c3tc32214a