Abstract
We have studied the Amplified Spontaneous Emission (ASE) characteristics of the conjugated copolymer poly{[2-[2',5'-bis(2 ''-ethylhexyloxy)phenyl]-1,4-phenylenevinylene]-co-[2-methoxy-5-(2'-ethylhexyloxy)-1,4-phenylenevinylene]) (BEHP-co-MEH-PPV) in a few organic solutions under optical pumping by the third harmonic of Nd:YAG (355 nm). The results show that in BEHP-co-MEH-PPV, the BEHP-PPV component is capable of forcing MEH-PPV to produce ASE at 560 nm, which appears to arise out of the non-excimeric state of MEH-PPV.
The ASE of BEHP-co-MEH-PPV was also compared with the conventional laser dyes Rhodamine B (Rh B), Rhodamine 6G (Rh 6G), and also the new laser material MEH-PPV. (C) 2011 Elsevier B.V. All rights reserved.