Speakers

Electrochemistry and Photophysics

Nak Cheon_Jeong
Nak Cheon Jeong
DGIST, Korea
11:10~12:00,November 22nd, 2013

Abstract:

 

Dye-sensitized solar cells (DSCs), those comprising inorganic titania, molecular chromophores, and redox shuttles, have shown promise as a low-tech alternative to pricy silicon-based solar cells. In order to improve the photon-to-electron conversion quantum efficiency, lots of efforts have been directed at engineering photoanode, cathode, and molecular dye. Basically, those are for increment of light harvesting and decrement of charge recombination. Meanwhile, discovery of new type of redox shuttle has been raised as a red-hot issue. It is owing to expectation of its non-corrosiveness and substantially higher photovoltage, relative to the traditional iodine/iodide shuttle. In this lecture, I will present, as progress on increasing light harvesting efficiency, photoanodes fabricating with synthesized, smaller TiO2 nanoparticles (~ 9 nm), implementing surface plasmon resonance of silver nanoparticles into TiO2 nanonetworks, and affording spatial isolation of differing chromophores. Finally, I will also present about a new, but simple and ubiquitous redox shuttle. It is single, but not coupled such like I-/I3– or CoII/CoIII. Nevertheless, it engenders non-corrosiveness and substantially high photovoltage (ca. 1000 mV).

 

Research Interests:

Energy-related nanoporous materials. For instance, porous metal oxides, quantum dots (QDs) or quantum wires (QWs) in nanoporous materials, dye-sensitized solar cells, and ion-conductive metal-organic framework materials. Further information can be found at: http://ncjeong.dgist.ac.krc

 

Awards and Honors:

  • IUPAC Prize, Korea Chemical Society, 2008.
  • Korean Physical Society Prize, 2008.