|Polymer Chromophore-Catalyst Assembly for Solar Fuel Generation|
: 120 : 2017.04.26 12:00
|일시 : 2017.04.26 17:00|
|소속 : University of Texas at San Antonio|
|발표자 : 임규|
|장소 : AS510|
Dye-sensitized photoelectrochemical cells (DSPECs) convert energy from the sun directly into fuel. The DSPEC approach is a hybrid based on molecular light absorption and excited state electron or hole injection into the conduction or valence bands of high band gap semiconductors. Toward fabricating DSPEC devices, we have reported polymer-based ruthenium(II) polypyridyl chromophore-catalyst assemblies on TiO2 by using a Layer-by-Layer (LbL) self-assembly process for light driven water oxidation. The photophysical and electrochemical properties of the polychromophore-catalyst assembly were characterized in a solution and at the semiconductor interface and the energy/electron transfer processes were investigated in the polymer assembly. Importantly, photocurrent measurements of the polyelectrolyte LbL films formed on mesoporous semiconductor substrates demonstrate a clear anodic photocurrent response, coupled with the observation of O2. This is the first report to demonstrate the use of polyelectrolyte LbL to construct chromophore−catalyst assemblies for water splitting reaction.