Well-Defined All-Conducting Block Copolymer Bilayer Hybrid Nanostructure: Selective Positioning of Lithium Ions and Efficient Charge Collection
SCIE
SCOPUS
- Title
- Well-Defined All-Conducting Block Copolymer Bilayer Hybrid Nanostructure: Selective Positioning of Lithium Ions and Efficient Charge Collection
- Authors
- In Young Song; Young Soo Kwon; Jongchul Lim; Park, T
- Date Issued
- 2014-07
- Publisher
- American Chemical Society
- Abstract
- A block copolymerization of nonfunctionalized conducting monomers was developed to enable the successful synthesis of a highly insoluble 3,4-(ethylenedioxy)thienyl-based allconducting block copolymer (PEDOT-b-PEDOT-TB) that could encapsulate nanocrystalline dyed TiO2 particles, resulting in the formation of an all-conducting block copolymer bilayer hybrid nanostructure (Tio(2)/Dye/PEDOT-b-PEDOT-TB). Lithium ions were selectively positioned on the outer PEDOT-TB surface. The distances through which the positively charged dye and PEDOT-TB(Li+) interacted physically or through which the TiO2 electrode and the Li+ centers on PEDOT-TB(Li+) interacted ionically were precisely tuned and optimized within ca. 1 nm by controlling the thickness of the PEDOT blocking layer (the block length). The optimized structure provided efficient charge collection in an iodine-free dye-sensitized solar cell (DSO due to negligible recombination of photoinduced electrons with cationic species and rapid charge transport, which improved the photovoltaic performance (eta = 2.1 -> 65%).
- Keywords
- all-conducting block copolymer; bilayer nanostructure; photoelectrochemical polymerizationselective; positioning of lithium Ions; SENSITIZED SOLAR-CELLS; NANOCRYSTALLINE TIO2; PHOTOVOLTAIC PERFORMANCE; DIBLOCK COPOLYMER; HOLE CONDUCTOR; REDOX COUPLE; RECOMBINATION; TRANSPORT; LIGHT; SPECTROSCOPY
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/14277
- DOI
- 10.1021/NN5016083
- ISSN
- 1936-0851
- Article Type
- Article
- Citation
- ACS NANO, vol. 8, no. 7, page. 6893 - 6901, 2014-07
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