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

Tae Woo Lee, O. Ok Park, Dong Hoon Choi, Hyun Nam Cho, Young Chul Kim

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24 Citations (Scopus)


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 Förster-type excitation energy transfer, respectively. A single component waveguide made of CPDHFPV gave the threshold energy of 160nJ/cm2/pulse. Moreover, that of the PVK/CPDHFPV (95/5 by wt.) blend device was as low as 20nJ/cm2/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.

Original languageEnglish
Pages (from-to)424-426
Number of pages3
JournalApplied Physics Letters
Issue number3
Publication statusPublished - 2002 Jul 15
Externally publishedYes


ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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