Laser from external energy transfer of MEHPPV conjugated polymer

Abstract

Mixtures made of poly[2-methyl-5-(2-ethyl-hexyloxy)-1,4-phenylene vinylene] (MEHPPV) conducting polymer and cresyl violet 670 have been utilized for studying the amplified spontaneous emission characteristics (ASE) in an organic solution under laser excitation. In our earlier communication, we had shown that MEHPPV alone could produce ASE under pulsed Nd: YAG laser excitation only in its excimeric state. In a follow up study reported here, a mixture of MEHPPV and cresyl violet in benzene at different ratios were prepared. The results showed that when the mixture was pumped by the third harmonic of Nd: YAG (355 nm), MEHPPV as a part of the mixture could get excited by pump laser pulse excitation, and transfer its excitation energy externally to cresyl violet to produce ASE. However, MEHPPV represents here as a donor while CV served as an acceptor. © 2011 Elsevier Ltd. All rights reserved.