NDLI: Solution processable star-shaped molecules with a triazine core and branching thienylenevinylenes for bulk heterojunction solar cells

Content Provider	Royal Society of Chemistry (RSC)
Author	Huang, Chien-Yi Lee, Wan-Hua Lee, Rong-Ho
Copyright Year	2014
Abstract	Two new star-shaped A–π–D molecules with triazine as a core and an acceptor unit, thienylenevinylene as the π bridge, and tert-butyl-substituted triphenylamine (tTPA)- or carbazole (tCz) as the end group and donor units of TTVTPA and TTVCz were synthesized for their application as donor materials in solution processed bulk heterojunction organic solar cells (OSCs). The charge transfer was convergent from peripheral groups to the central core along the conjugated branches in these star-shaped molecules (SSMs). TTVTPA and TTVCz are soluble in common organic solvents. Excellent thermal stability was observed for TTVTPA and TTVCz. OSCs were fabricated by spin-coating a blend of each SSM with the fullerene derivatives (PC61BM or PC71BM) as a composite film-type photoactive layer. The PV properties of the TTVTPA/fullerene derivative based OSCs were considerably better than those of the TTVCz/fullerene derivative blend based OSCs. A power conversion efficiency of 2.48%, a short-circuit current density of 10.57 mA cm−2, an open-circuit voltage of 0.69 V, and a fill factor of 0.34 were observed for the OSC based on the active layer of TTVTPA/PC71BM (1 : 7, w/w).
Starting Page	48150
Ending Page	48162
Page Count	13
File Format	HTM / HTML PDF
ISSN	20462069
Volume Number	4
Issue Number	89
Journal	RSC Advances
DOI	10.1039/c4ra07139e
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Triazine Buckminsterfullerene Fullerene chemistry Trusted third party Triphenylamine Carbazole Electric current OSC Electron donor Heterojunction
Content Type	Text
Resource Type	Article
Subject	Chemistry Chemical Engineering

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