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Design and Synthesis of Novel Block Copolymers for Efficient Opto-Electronic ApplicationsIt has been predicted that nano-phase separated block copolymer systems containing electron rich donor blocks and electron deficient acceptor blocks may facilitate the charge carrier separation and migration in organic photovoltaic devices due to improved morphology in comparison to polymer blend system. This paper presents preliminary data describing the design and synthesis of a novel Donor-Bridge-Acceptor (D-B-A) block copolymer system for potential high efficient organic optoelectronic applications. Specifically, the donor block contains an electron donating alkyloxy derivatized polyphenylenevinylene (PPV), the acceptor block contains an electron withdrawing alkyl-sulfone derivatized polyphenylenevinylene (PPV), and the bridge block contains an electronically neutral non-conjugated aliphatic hydrocarbon chain. The key synthetic strategy includes the synthesis of each individual block first, then couple the blocks together. While the donor block stabilizes and facilitates the transport of the holes, the acceptor block stabilizes and facilitates the transport of the electrons, the bridge block is designed to hinder the probability of electron-hole recombination. Thus, improved charge separation and stability are expected with this system. In addition, charge migration toward electrodes may also be facilitated due to the potential nano-phase separated and highly ordered block copolymer ultra-structure.
Document ID
20030016549
Acquisition Source
Glenn Research Center
Document Type
Other
Authors
Sun, Sam-Shajing
(Norfolk State Univ. VA United States)
Fan, Zhen
(Norfolk State Univ. VA United States)
Wang, Yiqing
(Norfolk State Univ. VA United States)
Taft, Charles
(Norfolk State Univ. VA United States)
Haliburton, James
(Norfolk State Univ. VA United States)
Maaref, Shahin
(Norfolk State Univ. VA United States)
Date Acquired
September 7, 2013
Publication Date
January 1, 2002
Subject Category
Electronics And Electrical Engineering
Funding Number(s)
CONTRACT_GRANT: NAG3-2289
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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