Accession Number : ADA314803

Title :   Block Conjugated Copolymers: Towards Quantum-Well Nanostructures for Exploring Spatial Confinement Effects on Electronic, Optoelectronic, and Optical Phenomena.

Descriptive Note : Technical rept.,

Corporate Author : ROCHESTER UNIV NY DEPT OF CHEMICAL ENGINEERING

Personal Author(s) : Chen, X. L. ; Jenekhe, Samson A.

PDF Url : ADA314803

Report Date : 09 SEP 1996

Pagination or Media Count : 20

Abstract : An ABA triblock conjugated copolymer, poly(2,5-benzoxazole)-block-poly(benzobisthiazole-1,4-phenylene)-block-poly(2,5-benzoxazole), 1, was synthesized, characterized, and used to demonstrate spatial confinement effects on the electronic structure and the optical and optoelectronic properties of block copolymers. Optical absorption, photoluminescence, and photoluminescence excitation spectra of thin films of the triblock copolymer evidence spatial confinement of excitons as well as microphase separation. Efficient energy transfer via interchain and intrachain mechanisms were observed in the triblock conjugated copolymer. The results suggest that microphase separation in bulk block conjugated copolymers can significantly modify the spatial modulation and confinement dimensionalities expected in isolated block copolymer chains.

Descriptors :   *ELECTRONICS, *SPATIAL DISTRIBUTION, *QUANTUM WELLS, *BLOCK COPOLYMERS, *COPOLYMERS, *OPTICAL PHENOMENA, *CONFINEMENT(GENERAL), OPTICAL PROPERTIES, ELECTROOPTICS, EXCITATION, PHOTOLUMINESCENCE, THIN FILMS, ISOLATION, ENERGY TRANSFER, SPECTRA, RADIATION ABSORPTION, CHAINS, MODULATION, EXCITONS.

Subject Categories : Polymer Chemistry
      Physical Chemistry
      Optics
      Quantum Theory and Relativity

Distribution Statement : APPROVED FOR PUBLIC RELEASE