Ultraviolet amplified spontaneous emission from thin films of 4,4′-bis(9-carbazolyl)-2,2′-biphenyl and the derivatives

Yuichiro Kawamura, Hidetoshi Yamamoto, Kenichi Goushi, Hiroyuki Sasabe, Chihaya Adachi, Hiroki Yoshizaki

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

394 nm ultraviolet amplified spontaneous emission (ASE) with a low pumping power threshold, from a thin film of an organic semiconductor 4,4′-bis(9-carbazolyl)-2,2′-biphenyl (CBP) is demonstrated. It is done under the pulse excitation of a N2 gas laser (337 nm). It is found that 3,6-dimethyl and 3-methyl substituted CBP derivatives also exhibited ASE in the deep-blue region of 406 and 401 nm. The results show that the ASE gain is correlated with the radiative decay rate (kf) i.e. larger kf resulted in a larger ASE gain.

Original languageEnglish
Pages (from-to)2724-2726
Number of pages3
JournalApplied Physics Letters
Volume84
Issue number15
DOIs
Publication statusPublished - Apr 12 2004
Externally publishedYes

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ultraviolet emission
spontaneous emission
thin films
gas lasers
organic semiconductors
decay rates
pumping
thresholds
pulses
excitation

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

Cite this

Ultraviolet amplified spontaneous emission from thin films of 4,4′-bis(9-carbazolyl)-2,2′-biphenyl and the derivatives. / Kawamura, Yuichiro; Yamamoto, Hidetoshi; Goushi, Kenichi; Sasabe, Hiroyuki; Adachi, Chihaya; Yoshizaki, Hiroki.

In: Applied Physics Letters, Vol. 84, No. 15, 12.04.2004, p. 2724-2726.

Research output: Contribution to journalArticle

Kawamura, Yuichiro ; Yamamoto, Hidetoshi ; Goushi, Kenichi ; Sasabe, Hiroyuki ; Adachi, Chihaya ; Yoshizaki, Hiroki. / Ultraviolet amplified spontaneous emission from thin films of 4,4′-bis(9-carbazolyl)-2,2′-biphenyl and the derivatives. In: Applied Physics Letters. 2004 ; Vol. 84, No. 15. pp. 2724-2726.
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AU - Yoshizaki, Hiroki

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