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|
| Type |
Symposium |
| Area |
Photocatalytic Water Oxidation and Carbon Dioxide Reduction Ⅰ |
| Room No. |
408호 |
| Time |
THU 10:00-: |
| Code |
IND1-3 |
| Subject |
태양에너지의 화학적 연료 변환을 위한 염료감응형 광전합성소자
(Dye-Sensitized Photoelectrosynthesis Cell (DSPEC) for Solar Fuel Production)
|
| Authors |
위경량
대구대학교 화학응용화학과, Korea |
| Abstract |
In this presentation, we will introduce an artificial photosynthesis system for the solar fuel production from the water. Among the various artificial photosynthesis systems, we are focusing the dye-sensitized photoelectrochemical cell (DSPEC), which is molecular level light absorption and oxidation (or reduction) catalyst approaches. In the DSPEC, the achievement of long-lived photoinduced redox separation lifetimes has long been a central goal of molecular-based solar energy conversion strategies. The longer the redox-separation lifetime, the more time available for useful work to be extracted from the absorbed photon energy. Here we describe a novel strategy for dye-sensitized solar energy applications in which redox-separated lifetimes on the order of milliseconds to seconds can be achieved based on a simple toolkit of molecular components. Specifically, molecular chromophores (C), electron acceptors (A) and electron donors (D) were self-assembled on the surfaces of mesoporous, transparent conducting indium tin oxide nanoparticle (nanoITO) electrodes to prepare both photoanode (nanoITO|–A–C–D) and photocathode (nanoITO|–D–C–A) assemblies. Nanosecond transientabsorption and steady-state photolysis measurements show that the electrodes function microscopically as molecular analogues of semiconductor p/n junctions. These results point to a new chemical strategy for dye-sensitized solar energy conversion based on molecular excited states and electron acceptors/donors on the surfaces of transparent conducting oxide nanoparticle electrodes. |
| E-mail |
krwee@daegu.ac.kr |
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119th General Meeting of the KCS