@article{Park2014, 
author = {Sangbaek Park and Donghoe Kim and Chan Woo Lee and Seong-Deok Seo and Hae Jin Kim and Hyun Soo Han and Kug Sun Hong and Dong-Wan Kim},
title = {Surface-area-tuned, quantum-dot-sensitized heterostructured nanoarchitectures for highly efficient photoelectrodes},
year = {2014},
journal = {Nano Research},
volume = {7},
number = {1},
pages = {144-153},
keywords = {Photoelectrochemical, hydrogen evolution, antimony-doped tin oxide, TiO2, quantum dot},
url = {https://www.sciopen.com/article/10.1007/s12274-013-0381-z},
doi = {10.1007/s12274-013-0381-z},
abstract = {Harvesting solar energy to produce clean hydrogen from photoelectrolysis of water presents a valuable opportunity to find alternatives for fossil fuels. Three-dimensional nanoarchitecturing techniques can afford enhanced photoelectrochemical properties by improving geometrical and structural effects. Here, we report quantum-dot sensitized TiO2–Sb: SnO2 heterostructures as a model electrode to enable the optimization of the structural effects through the creation of a highly conductive pathway using a transparent conducting oxide (TCO), coupled with a high surface area, by introducing branching and low interfacial resistance via an epitaxial relationship. An examination of various morphologies (dot, rod, and lamella shape) of TiO2 reveals that the rod-shaped TiO2–Sb: SnO2 is a more effective structure than the others. A photoelectrode fabricated using optimized CdS–TiO2–Sb: SnO2 produces a photocurrent density of 7.75 mA/cm2 at 0.4 V versus a reversible hydrogen electrode. These results demonstrate that constructing a branched heterostructure based on TCO can realize high-performance photoelectrochemical devices.}
}