Detailed Information

Cited 0 time in webofscience Cited 0 time in scopus
Metadata Downloads

Charge separation properties of Ta3N5 photoanodes synthesized via a simple metal-organic-precursor decomposition process

Authors
Han, Sung GyuChae, Sang YounLee, Si YoungMin, Byoung KounHwang, Yun Jeong
Issue Date
28-1월-2018
Publisher
ROYAL SOC CHEMISTRY
Citation
PHYSICAL CHEMISTRY CHEMICAL PHYSICS, v.20, no.4, pp.2865 - 2871
Indexed
SCIE
SCOPUS
Journal Title
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume
20
Number
4
Start Page
2865
End Page
2871
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/77931
DOI
10.1039/c7cp05406h
ISSN
1463-9076
Abstract
Here, we successfully synthesized a Ta3N5 thin film using a simple metal-organic-precursor decomposition process followed by its conversion to nitride and studied its photoelectrochemical (PEC) properties to understand charge separation on the surface. Newly synthesized Ta3N5 photoanodes showed a significant difference in the PEC activity in relation to the annealing temperature under ammonia flow, although similar light absorption properties or electronic states were obtained. Charge separation related PEC properties were analyzed using intensity modulated photocurrent density spectroscopy (IMPS) and photocurrent measurements in the absence/presence of scavengers. The charge transfer and recombination rate constants which are related to the photogenerated charge-separation dynamics on the Ta3N5 surface were found to be more sensitively influenced by the ammonia annealing temperatures, and low temperature (700 degrees C) treated Ta3N5 showed a fast recombination rate constant (k(r)). In addition, high-efficiency charge injection into the electrolyte on the surface was critically associated with the greatly enhanced photocurrent density of Ta3N5 synthesized at a higher temperature (900 degrees C) of ammonia annealing.
Files in This Item
There are no files associated with this item.
Appears in
Collections
ETC > 1. Journal Articles

qrcode

Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.

Altmetrics

Total Views & Downloads

BROWSE