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Optically Pumped Intensive Light Amplification from a Blue Oligomer.

Authors :
Aljaafreh, Mamduh J.
Prasad, Saradh
AlSalhi, Mohamad S.
Alahmed, Zeyad A.
Al-Mogren, Muneerah M.
Source :
Polymers (20734360); Oct2019, Vol. 11 Issue 10, p1534-1534, 1p, 1 Diagram, 13 Graphs
Publication Year :
2019

Abstract

We demonstrated the time-resolved dynamics of laser action from the conductive oligomer (CO) 1,4-Bis(9-ethyl-3-carbazo-vinylene)-9,9-dihexyl-fluorene (BECV-DHF). Absorption and fluorescence spectra were studied for BECV-DHF in different solvents under a wide range of concentrations. The Fourier-transform infrared spectroscopy (FTIR) spectrum was measured using simulation and experiments. The Ultraviolet-Visible (UV-VIS) spectra of the BECV-DHF were simulated in two different solutions. This CO formed a dimer and had two vibration bands in nonpolar solvents, partially dissolved in polar protic solvents, and created an H-type aggregate in polar aprotic solvents. BECV-DHF produced amplified spontaneous emission (ASE) at 464 nm in many solvents. The high efficiency of ASE is due to the waveguiding and self-assembly nature of the oligomer, which is very rare for optically pumped systems. However, BECV-DHF did not produce ASE in polar protic solvents. BECV-DHF produced ASE in both longitudinal and transverse pumping, and the full-width half maximum (FWHM) was 4 nm and 8 nm respectively for different solvents, such as toluene and acetone. The CO had a very low threshold pump energy (~0.5 mJ). The ASE efficiency was approximately 20%. The time-resolved spectroscopy (TRS) studies showed a temporal Gaussian-shaped ASE output from this CO. BECV-DHF shows remarkably high stability compare to the conjugated polymer (CP) PFO-co-pX. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
20734360
Volume :
11
Issue :
10
Database :
Complementary Index
Journal :
Polymers (20734360)
Publication Type :
Academic Journal
Accession number :
139604443
Full Text :
https://doi.org/10.3390/polym11101534