Low–threshold sky-blue gain medium from a Triazine-capped ladder-type oligomer neat film

Yuyu Liu, Kang Zhang, Yan Li, Qi Wei, Yifan Bo, Lianhui Wang, Yan Qian, Ruidong Xia, Qi Zhang, Wei Huang

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

A new solution-processable non-doped sky-blue organic laser gain medium has been developed based on triazine end-capped ladder-type oligo-(p-phenylene). The planar and symmetric conjugation of electron-withdrawing triazine moiety enables fine tuning of the emission from deep-blue to sky-blue with lowered LUMO energy level at no significant expense of optical gain properties. The emitter exhibits low amplified spontaneous emission (ASE) threshold of 41 nJ pulse−1 (621 W cm−2), high maximum net gain coefficient of 73 cm−1 and low loss coefficient of 6.45 cm−1. Notably, a decent ASE phenomenon (at wavelength of 481 nm) can still be detected at film thickness of 42 nm with an ASE threshold of 99 nJ pulse−1 (1.5 kW cm−2). These results suggest a prospective design concept for developing high-performance laser gain materials to address the challenge of electrically pumped organic lasers.

Original languageEnglish
Article number105452
JournalOrganic Electronics
Volume76
DOIs
StatePublished - Jan 2020

Keywords

  • Amplified spontaneous emission
  • Ladder-type oligomers
  • Non-doped organic semiconductors
  • Sky-blue laser gain medium
  • Spin-coating

Fingerprint

Dive into the research topics of 'Low–threshold sky-blue gain medium from a Triazine-capped ladder-type oligomer neat film'. Together they form a unique fingerprint.

Cite this