Nanoplatelet cryoaerogels with potential application in photoelectrochemical sensing

authored by

Anja Schlosser, Lea C. Meyer, Franziska Lübkemann, Jan F. Miethe, Nadja C. Bigall

Abstract

Semiconductor nanoparticle based porous 3D assemblies are interesting materials for various applications in the fields of photovoltaics, catalysis, or optical sensing. For use as photoelectrodes in photoelectrochemical sensors they need to be characterised by a high porosity, a good photostability, and a high charge carrier mobility. Our work reports on the preparation of cryoaerogel photoelectrodes based on CdSe nanoplatelets and their photoelectrochemical characterisation by means of linear sweep voltammetry (LSV) and intensity modulated photocurrent spectroscopy (IMPS). The obtained open-pored cryoaerogel films were observed to produce much higher photocurrents than comparable drop-cast films. By means of IMPS, the performance differences could be linked to the occurrence of charge carrier movement, which could solely be proven for the cryoaerogels. In a proof-of-principle experiment, the potential of the prepared photoelectrodes for application in photoelectrochemical sensing was moreover demonstrated.

Organisation(s)

Institute of Physical Chemistry and Electrochemistry
Laboratory of Nano and Quantum Engineering
PhoenixD: Photonics, Optics, and Engineering - Innovation Across Disciplines

Type

Article

Journal

Physical Chemistry Chemical Physics

Volume

21

Pages

9002-9012

No. of pages

11

ISSN

1463-9076

Publication date

14.05.2019

Publication status

Published

Peer reviewed

Yes

ASJC Scopus subject areas

Physics and Astronomy(all), Physical and Theoretical Chemistry

Electronic version(s)

https://doi.org/10.1039/c9cp00281b (Access: Open)