Title :
Decoupling bulk and surface contributions in water-splitting photocatalysts by in situ ultrafast spectroscopy
Author :
Appavoo, Kannatassen ; Liu, Mingzhao ; Black, Charles T. ; Sfeir, Matthew Y.
Author_Institution :
Center for Functional Nanomater., Brookhaven Nat. Lab., Upton, NY, USA
Abstract :
By performing ultrafast emission spectroscopy in an operating, bias-controlled photoelectrochemical cell, we distinguish between bulk (charge transport) and surface (chemical reaction) recombination processes in a nanostructured photocatalyst and correlate its electronic properties directly with its incident-photon-to-current efficiency.
Keywords :
catalysis; charge exchange; high-speed optical techniques; nanophotonics; nanostructured materials; optical control; photochemistry; photoelectrochemical cells; time resolved spectra; bias-controlled photoelectrochemical cell; charge transport; chemical reaction; electronic properties; incident-photon-to-current efficiency; nanostructured photocatalyst; ultrafast emission spectroscopy; water-splitting photocatalysts; Chemicals; II-VI semiconductor materials; Spectroscopy; Stimulated emission; Surface impedance; Ultrafast optics; Zinc oxide;
Conference_Titel :
Lasers and Electro-Optics (CLEO), 2015 Conference on
Conference_Location :
San Jose, CA
