NDLI: Photoluminescence Influenced by Chain Conformation in Thin Conjugated Polymer Films by Spin Coating and Dewetting

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Photoluminescence Influenced by Chain Conformation in Thin Conjugated Polymer Films by Spin Coating and Dewetting

Content Provider	Semantic Scholar
Author	Lee, Parker W. Li, Wei-Cheng Chien, Yi Chi Reiter, Günter Yang, A.c.-M.
Copyright Year	2011
Abstract	Submitted for the MAR11 Meeting of The American Physical Society Photoluminescence Influenced by Chain Conformation in Thin Conjugated Polymer Films by Spin Coating and Dewetting P.W. LEE, W.C. LI, Y. CHIEN, Department of Materials Science and Engineering, National Tsing Hua University, G. REITER, nstitute of Physics, Albert-Ludwigs-Universität, Freiburg, Germany, A.C.-M. YANG, Department of Materials Science and Engineering, National Tsing Hua University — Motivated by recent observations of photoluminescence (PL) enhancement by molecular constraints, the chain conformation effect was explored. It was found that PL efficiency decreased with film thickness under a constant spin speed but increased under a constant solution concentration indicating that prolonged solvent evaporation, and hence more open entangled coils, improved PL efficiencies. Strong substrate dependence was observed in the ultrathin regime, revealing the role of substrate-polymer interactions during the condensation process. Upon annealing, the thin film dewetted and resulted multi-fold PL enhancement. As revealed by micro-PL spectroscopy, the PL efficiency was about 10 times greater in the residual layer (∼3 nm) than that in the droplets and demonstrated independence of substrate quenching effect, unveiling important optoelectronic features of the molecular constrained states. P. W. Lee Department of Materials Science and Engineering, National Tsing Hua University Date submitted: 13 Dec 2010 Electronic form version 1.4
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://absimage.aps.org/image/MAR11/MWS_MAR11-2010-004186.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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