Abstract
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•The properties of a hole-transport material poly-TDP (4B) was studied.•The ASE from a conjugated polymer poly-TDP (4B) was studied.•The temperature dependent dimerization was used to activate the ASE.•The temperature was used to control output energy of the ASE.•TRS was employed to show the temperature responsiveness of poly-TDP (4B).
A plethora of experimental reports and evidences from recent times have collectively taken efforts in developing a novel mirror-less laser. Breakthrough in Conjugated polymer lasers unravel numerous attractive research direction over the last decade. The present study experimentally demonstrated a temperature-activated/controlled amplified spontaneous emission (ASE) in a hole-transport conjugated polymer (HTCP) Poly[N,N’-bis(4-butylphenyl)-N,N’-bis(phenyl)-benzidine] [poly-TDP (4B)]. The poly-TDP (4B) dissolved in toluene under wide range concentration. The solution of different concentration was pumped with an Nd:YAG (355 nm) laser. For temperature lower than 37 °C, the poly-TDP (4B) did not produce ASE, but for the 40 °C, the ASE is observed. Furthermore, the output energy of the ASE is dependent on the temperature of the solution. The ASE output energy attains maximum at a temperature of 78 °C, and then the output falls drastically. The time-resolved spectroscopy studies showed the temperature responsiveness of the HTCP poly-TDP (4B) in the sub-nanosecond time domain. The temperature-dependent laser action is due to reversible dimerization property of the poly-TDP (4B), and it is rare.