Polymer frontier orbital and morphology engineering for nanophotonics

Sam-Shajing Sun; Thuong Nguyen; Jaleesa Brooks; Amanda Harding; Eumee Song; Tanya David; Cheng Zhang

doi:10.1117/12.930615

15 October 2012 Polymer frontier orbital and morphology engineering for nanophotonics

Sam-Shajing Sun, Thuong Nguyen, Jaleesa Brooks, Amanda Harding, Eumee Song, Tanya David, Cheng Zhang

Proceedings Volume 8519, Nanophotonics and Macrophotonics for Space Environments VI; 85190A (2012) https://doi.org/10.1117/12.930615
Event: SPIE Optical Engineering + Applications, 2012, San Diego, California, United States

Abstract

Polymer thin film based optoelectronic devices including solar cells appear attractive for space applications where lightweight, large size, low cost, and flexible shape are desirable. The photoelectric power conversion efficiencies of currently reported polymer solar cells are still relatively low (typically less than 8% under AM 1.5 and one Sun intensity) due to several losses, i.e., the ‘photon loss’ due to mismatch of materials energy gaps versus the sunlight photon energies, the ‘exciton loss’ and the ‘carrier loss’ due to poor solid state morphologies of existing polymeric donor/acceptor binary systems. Therefore, both molecular frontier orbitals (HOMOs, LUMOs) and phase morphologies need to be optimized to further enhance the efficiency. In this presentation, our recent efforts on frontier orbital and morphology engineering of conjugated polymer blocks and corresponding block copolymers will be reviewed. The HOMO/LUMO energy gaps of the new polymers were in a range of 1.5-2.0 eV which are attractive for solar cell applications. The terminal functional groups of donor and acceptor type conjugated blocks make them potentially ideal candidates for the development of donor/acceptor block copolymer supramolecular nanostructures for a variety of high efficiency optoelectronic applications. Dye sensitized triple system appear attractive for high efficiency optoelectronics due to reduction of charge recombination.

Citation Download Citation

Sam-Shajing Sun, Thuong Nguyen, Jaleesa Brooks, Amanda Harding, Eumee Song, Tanya David, and Cheng Zhang "Polymer frontier orbital and morphology engineering for nanophotonics", Proc. SPIE 8519, Nanophotonics and Macrophotonics for Space Environments VI, 85190A (15 October 2012); https://doi.org/10.1117/12.930615

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