Open AccessGas to crystal Effect on the Spectral Line Narrowing of MEH-PPV
Author(s) -
Aziz Mahfoud Familia,
Andrew Sarangan,
Thomas R. Nelson
Publication year - 2007
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.15.008231
Subject(s) - materials science , optics , polymer , emission spectrum , crystal (programming language) , conjugated system , substrate (aquarium) , spectral line , optoelectronics , physics , oceanography , astronomy , computer science , composite material , programming language , geology
We report two emission bands corresponding to the spectral line narrowing (SLN) of the conjugated polymer [2-methoxy-5-(2'-ethylhexyloxy)-1, 4-phenylenevinylene] (MEH-PPV) in films. The SLN emission coming from the polymer chains closer to the glass substrate are at a different spectral position compared to the chains that lay further away from the glass substrate. We explain this phenomenon as a direct consequence of the "gas-to-crystal" effect. In solution form, as concentration was increased, and thus the proportion of aggregates, a decrease in the SLN bandwidth and a red shift of the emission peak was observed.