Deep-Red Amplified Spontaneous Emission from cis-Configured Squaraine

Hao Ye, Linsong Cui, Toshinori Matsushima, Chuanjiang Qin, Chihaya Adachi

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)


We report deep-red amplified spontaneous emission (ASE) from cis-configured squaraine (cis-DCSQ1) under optical pumping. Doping of cis-DCSQ1 into a 4,4′-bis(9-carbazolyl)-2,2′-biphenyl (CBP) host film at an appropriate concentration (0.5 wt % for this system) led to a marked increase of photoluminescence quantum yield because of efficient CBP-to-cis-DCSQ1 Förster resonance energy transfer and suppression of aggregation-caused quenching. Thus, this doped film showed clear ASE with a threshold of around 10 μJ cm-2 and peak wavelength of 687 nm. These results proved that cis-configured squaraine derivatives are promising as gain materials for future applications as deep-red organic lasers.

Original languageEnglish
Pages (from-to)27-31
Number of pages5
JournalACS Applied Materials and Interfaces
Issue number1
Publication statusPublished - Jan 10 2018

All Science Journal Classification (ASJC) codes

  • General Materials Science


Dive into the research topics of 'Deep-Red Amplified Spontaneous Emission from cis-Configured Squaraine'. Together they form a unique fingerprint.

Cite this