6533b853fe1ef96bd12accba
RESEARCH PRODUCT
HAPPY Dyes as Light Amplification Media in Thin Films
Juozas V. GrazuleviciusJulija PerveneckaValdis KokarsElmars ZarinsElmars ZarinsKarlis BalodisOleksandr BezvikonnyiAivars VembrisDmytro VolyniukElina Misinasubject
chemistry.chemical_classificationAmplified spontaneous emission010405 organic chemistryOrganic ChemistryDopingPolymer010402 general chemistryPhotochemistry01 natural sciences0104 chemical scienceschemistryThermal stabilityThin filmGlass transitionLuminescenceLasing thresholddescription
A series of 1Hamorphous tri-phenyl pyridine (HAPPY) dyes have been synthesized from luminescent triphenyl-group-containing 2-methyl-6-styryl-substituted-4H-pyran-4-ylidene derivatives in reactions with benzylamine and investigated for suitability as solution-processable light-emitting medium components in thin films for amplified spontaneous emission (ASE). Conversion of a 4H-pyrane ring into a 1H-pyridine fragment enables aggregation-induced emission enhancement (AIEE) behavior in the target products and slightly increases thermal stability, glass transition temperatures, and ASE efficiency with PLQY up to 15% and ASE thresholds as low as 46 μJ/cm2 in neat spin-cast films, although thermal and photophysical properties are mostly dominated by the incorporated electron acceptors. Continued lasing parameter efficiency parameter improvement experiments revealed that no further optimization of HAPPY dyes by doping in polymer matrixes is required as the amplified spontaneous emission thresholds were lowest in pure neat films due to the AIEE phenomenon.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2021-01-30 | The Journal of Organic Chemistry |