Abstract
In this work, we had studied the Amplified Spontaneous Emission( ASE) properties of polymer BEHP-co-MEH-PPV in THF, under pulsed laser excitation. In our earlier communication, we had shown that MEH-PPV alone could produce ASE under pulsed Nd: YAG laser excitation only in its excimeric state. A follow up study reported here, on conjugated polymer shows that in BEHP-co-MEH-PPV, the BEH-PPPV component is capable of forcing MEH-PPV to produce ASE at 560nm, which appears to arise out of the monomeric state of MEH-PPV. It is important to note that BEHP-PPV as a part of the compound could get excited by pump laser pulse, and transfer its excitation energy internally to MEH-PV helping MEH-PPV to produce ASE in non excimeric state. Also we had investigated the energy-transfer process externally from the donor coumarin485 (C485) to acceptor MEH-PPV By this processes also MEH- PPV could be forced to produce ASE from the monomeric state
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