Linkage effects of linear D-pi-A-pi-D type diketopyrrolopyrrole-triphenylamine based solution-processable organic small molecule photovoltaic materials
Release Time:2019-03-09 Hits:
Indexed by: Journal Article
Date of Publication: 2014-05-28
Journal: JOURNAL OF MATERIALS CHEMISTRY C
Included Journals: Scopus、EI、SCIE
Volume: 2
Issue: 20
Page Number: 4019-4026
ISSN: 2050-7526
Abstract: 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-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.
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