Lee, TW Park, OO Choi, DH Cho, HN Kim, YC 2024-01-21T10:14:42Z 2024-01-21T10:14:42Z 2021-09-01 2002-07-15 0003-6951 https://pubs.kist.re.kr/handle/201004/139374 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. English AMER INST PHYSICS LIGHT-EMITTING-DIODES SEMICONDUCTING POLYMER CONJUGATED POLYMERS THIN-FILMS LASER Low-threshold blue amplified spontaneous emission in a statistical copolymer and its blend Article 10.1063/1.1491297 1 APPLIED PHYSICS LETTERS, v.81, no.3, pp.424 - 426 APPLIED PHYSICS LETTERS 81 3 424 426 scie scopus 000176599600012 2-s2.0-79956050081 Physics, Applied Physics Article LIGHT-EMITTING-DIODES SEMICONDUCTING POLYMER CONJUGATED POLYMERS THIN-FILMS LASER amplified spontaneous emission