NDLI: Solution-processed bulk heterojunction photovoltaic cells from gradient pi-conjugated thienylene vinylene dendrimers.

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Solution-processed bulk heterojunction photovoltaic cells from gradient pi-conjugated thienylene vinylene dendrimers.

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Solution-processed bulk heterojunction photovoltaic cells from gradient pi-conjugated thienylene vinylene dendrimers.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Wang, Jin-Liang Zhong, Chengmei Tang, Zheng-Ming Wu, Hongbin Ma, Yuguo Cao, Yong Pei, Jian
Description	Country affiliation: China Author Affiliation: Wang JL ( Beijing National Laboratory for Molecular Sciences, The Key Laboratory of Bioorganic Chemistry and Molecular Engineering of the Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China.)
Abstract	A series of gradient pi-conjugated dendrimers and their corresponding models based on 5,5,10,10,15,15-hexahexyltruxene moieties as nodes and oligo(thienylene vinylene) (OTVs) units with different lengths as branching arms are synthesized in good yields through Wittig-Horner reactions. All new compounds are fully characterized by (1)H and (13)C NMR spectroscopy, elemental analysis, and MALDI-TOF MS or ESI-MS. Investigation of their photophysical properties reveals that the gradient dendritic scaffold not only results in a higher molar absorption coefficient and broader absorption region than those of their corresponding model compounds, but also improves the PL quantum yields relative to the corresponding OTVs. The suitable HOMO and LUMO levels as well as excellent film forming properties make these molecules potential candidates for organic solar cells. Solution-processed bulk heterojunction solar cells using these dendrimers as donor and [6,6]-phenyl-C(61) butyric acid methyl ester as acceptor are prepared and tested. The power conversion efficiency of the devices based on G0-4-2 is 0.40 % under illumination of air mass 1.5 and 100 mW cm(-2). This is the highest record value for OTV-based materials to date. Although the absorption band of dendrimer G0-4-2 is much narrower than that of poly(3-hexylthienylene vinylene) (P3HTV), the efficiency of its solar cell device is almost twice that of the device based on P3HTV. This result shows clearly the advantage of gradient dendritic structures as active materials for photovoltaic cells.
File Format	HTM / HTML
ISSN	18614728
Issue Number	1
Journal	Chemistry - An Asian Journal
Volume Number	5
e-ISSN	1861471X
Language	English
Publisher	Wiley-VCH
Publisher Date	2010-01-04
Publisher Place	Germany
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Research Support, Non-u.s. Gov't Dendrimers Chemistry Spectrophotometry, Infrared Thiophenes Electrochemical Techniques Discipline Chemistry Chemical Synthesis Journal Article Spectrometry, Mass, Matrix-assisted Laser Desorption-ionization
Content Type	Text
Resource Type	Article
Subject	Organic Chemistry Biochemistry

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