title: Large enhancements in optoelectronic efficiencies of nano-plastically stressed conjugated polymer strands.
abstract: The photoluminescence (PL) of well dispersed molecules of a conjugated polymer, poly[2-methoxy-5-((2'-ethylhexyl)oxy)-1,4-phenylene-vinylene] (MEH-PPV), in an optically inert matrix manifested dramatic increases when the individual molecular strands were fully stretched. The PL increase rose with stretching and may reach several folds when the mechanical strain of the matrix polymer went beyond 550%. Strong polarization effects indicate that stretching individual polymer chains was responsible for the PL enhancement. This effect was attributed to suppression of electron-phonon interactions in the stress-rigidified polymer chain segments and may be useful for efficiency-enhanced polymer-based optoelectronic devices.
authors.affiliation: Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 300, Taiwan.
authors.forename: Kuang-Po
authors.initials: KP
authors.lastname: Tung
authors.forename: Chein-Chung
authors.initials: CC
authors.lastname: Chen
authors.forename: Peiwei
authors.initials: P
authors.lastname: Lee
authors.forename: Yi-Wei
authors.initials: YW
authors.lastname: Liu
authors.forename: Tzay-Ming
authors.initials: TM
authors.lastname: Hong
authors.forename: Kuo Chu
authors.initials: KC
authors.lastname: Hwang
authors.forename: Jui Hung
authors.initials: JH
authors.lastname: Hsu
authors.forename: Jonathan David
authors.initials: JD
authors.lastname: White
authors.forename: Arnold Chang-Mou
authors.initials: AC
authors.lastname: Yang