Low-threshold blue amplified spontaneous emission in a statistical copolymer and its blend

We report low-threshold, blue amplified spontaneous emission (ASE) in a statistical copolymer, poly(9,9-dihexylfluorene-2,7-divinylene-m-phenylenevinylene-stat-p-phenylenevinylene) (CPDHFPV) and its blend with poly(9-vinylcarbazole) (PVK). PVK and CPDHFPV acted as the donor and the acceptor of the Forster-type excitation energy transfer, respectively. A single component waveguide made of CPDHFPV gave the threshold energy of 160 nJ/cm(2)/pulse. Moreover, that of the PVK/CPDHFPV (95/5 by wt.) blend device was as low as 20 nJ/cm(2)/pulse. From the relationship between the ASE intensity and the film thickness, we suggest that the optimum thickness for the photopumped ASE should be the transverse electric-mode cutoff thickness. (C) 2002 American Institute of Physics.
Publisher
AMER INST PHYSICS
Issue Date
2002-07
Language
ENG
Keywords

LIGHT-EMITTING-DIODES; SEMICONDUCTING POLYMER; CONJUGATED POLYMERS; THIN-FILMS; LASER

Citation

APPLIED PHYSICS LETTERS, v.81, no.3, pp.424 - 426

ISSN
0003-6951
URI
http://hdl.handle.net/10203/5026
Appears in Collection
CBE-Journal Papers(저널논문)
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