21 February 2002 Design and synthesis of novel block copolymers for efficient optoelectronic applications
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Proceedings Volume 4465, Organic Photovoltaics II; (2002); doi: 10.1117/12.456932
Event: International Symposium on Optical Science and Technology, 2001, San Diego, CA, United States
Abstract
It 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 opto-electronic 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.
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Sam-Shajing Sun, Zhen Fan, Yiqing Wang, Charles Taft, James H. Haliburton, Shahin Maaref, "Design and synthesis of novel block copolymers for efficient optoelectronic applications", Proc. SPIE 4465, Organic Photovoltaics II, (21 February 2002); doi: 10.1117/12.456932; https://doi.org/10.1117/12.456932
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KEYWORDS
Polymers

Bridges

Optoelectronics

Excitons

Chlorine

Electro optic polymers

Electrodes

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