Supramolecular Polymer-Molecule Complexes as Gain Media for Ultraviolet Lasers

Jin Yi Lin, Gang Yi Zhu, Bin Liu, Meng Na Yu, Xu Hua Wang, Long Wang, Wen Sai Zhu, Ling Hai Xie, Chun Xiang Xu, Jian Pu Wang, Paul N. Stavrinou, Donal D.C. Bradley, Wei Huang

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

A novel supramolecular system comprising a complex of 9,9′-diphenyl-9H,9′H-2,2′-bifluorene-9,9′-diol (DPFOH) with poly(methyl methacrylate) (PMMA) is presented as an attractive system for optical gain in the ultraviolet. The analogue compound 9,9′-diphenyl-9H,9′H-2,2′-bifluorene (DPFO8) without an -OH substituent was synthesized alongside DPFOH to confirm the importance of its chemical structure to the thin-film microstructure. A hydrogen-bonding interaction allows the molecule such as DPFOH and a combination of DPFOH and PMMA to have an excellent solution-processed high quality coating film. In stark contrast to the DPFO8 system, we find that the addition of 1 wt % DPFOH to PMMA leads to spontaneous formation of a supramolecular complex via hydrogen bonding interactions, giving rise to a homogeneous film with relatively high photoluminescence quantum efficiency ∼38 (±5)%. The demonstration of ultraviolet laser action with peak wavelength emission at 385 nm provided further evidence of the high optical quality of the DPFOH/PMMA supramolecular complex films. The DPFOH/PMMA supramolecular complex has great potential for use in low-cost solution-processed optoelectronic devices.
Original languageEnglish (US)
JournalACS Macro Letters
Volume5
Issue number8
DOIs
StatePublished - Aug 16 2016
Externally publishedYes

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