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 journalArticlepeer-review

31 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

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

Fingerprint Dive into the research topics of 'Ultraviolet amplified spontaneous emission from thin films of 4,4′-bis(9-carbazolyl)-2,2′-biphenyl and the derivatives'. Together they form a unique fingerprint.

Cite this