Polythiophene Derivative with a Side Chain Chromophore as Photovoltaic andPhotorefractive Materials

摘要

A new, solution processable, thiophene copolymer with a side chain nonlinearoptical (NLO) chromophore namely Poly(3-octylthiophene-co-N-(3-thenyl)-4-amino-2-nitro phenol) (POMDT) has been chemically synthesized. The copolymer was further functionalized with a photocrosslinkable cinnamoyl group, and was doped with a photocrosslinkable NLO dye. The poled, photocrosslinked, dye doped copolymer exhibited relatively large second order NLO effects (d33 = 18.6 pm/V and 3.3 pm/V at 1.064 micrometers and 1.542 micrometers, respectively). The NLO properties of the photocrosslinked samples were stable at room temperature for 100 hours. The combination of reasonably good second order optical nonlinearity with established photoconducting behavior of the polythiophenes allows these type of polymers to be candidate materials in photovoltaic and photorefractive applications. Polythiophene, Side-Chain Chromophore, Photovoltaic, Photorefractive, Photocrosslinkable NLO Polymer.