Citation

BibTex format

@article{Perevedentsev:2016:10.1002/polb.24106,
author = {Perevedentsev, A and Chander, N and Kim, J-S and Bradley, DDC},
doi = {10.1002/polb.24106},
journal = {Journal of Polymer Science Part B-Polymer Physics},
pages = {1995--2006},
title = {Spectroscopic properties of poly(9,9-dioctylfluorene) thin films possessing varied fractions of -phase chain segments: enhanced photoluminescence efficiency via conformation structuring},
url = {http://dx.doi.org/10.1002/polb.24106},
volume = {54},
year = {2016}
}

RIS format (EndNote, RefMan)

TY  - JOUR
AB - Poly(9,9-dioctylfluorene) (PFO) is a widely studied blue-emitting conjugated polymer, the optoelectronic properties of which are strongly affected by the presence of a well-defined chain-extended “β-phase” conformational isomer. In this study, optical and Raman spectroscopy are used to systematically investigate the properties of PFO thin films featuring a varied fraction of β-phase chain segments. Results show that the photoluminescence quantum efficiency (PLQE) of PFO films is highly sensitive to both the β-phase fraction and the method by which it was induced. Notably, a PLQE of ∼69% is measured for PFO films possessing a ∼6% β-phase fraction induced by immersion in solvent/nonsolvent mixtures; this value is substantially higher than the average PLQE of ∼55% recorded for other β-phase films. Furthermore, a linear relationship is observed between the intensity ratios of selected Raman peaks and the β-phase fraction determined by commonly used absorption calibrations, suggesting that Raman spectroscopy can be used as an alternative means to quantify the β-phase fraction. As a specific example, spatial Raman mapping is used to image a mm-scale β-phase stripe patterned in a glassy PFO film, with the extracted β-phase fraction showing excellent agreement with the results of optical spectroscopy.
AU - Perevedentsev,A
AU - Chander,N
AU - Kim,J-S
AU - Bradley,DDC
DO - 10.1002/polb.24106
EP - 2006
PY - 2016///
SN - 1099-0488
SP - 1995
TI - Spectroscopic properties of poly(9,9-dioctylfluorene) thin films possessing varied fractions of -phase chain segments: enhanced photoluminescence efficiency via conformation structuring
T2 - Journal of Polymer Science Part B-Polymer Physics
UR - http://dx.doi.org/10.1002/polb.24106
UR - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000383289000011&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR - http://hdl.handle.net/10044/1/42870
VL - 54
ER -