Nanoplatelet cryoaerogels with potential application in photoelectrochemical sensing

verfasst von

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.

Organisationseinheit(en)

Institut für Physikalische Chemie und Elektrochemie
Laboratorium für Nano- und Quantenengineering
PhoenixD: Simulation, Fabrikation und Anwendung optischer Systeme

Typ

Artikel

Journal

Physical Chemistry Chemical Physics

Band

21

Seiten

9002-9012

Anzahl der Seiten

11

ISSN

1463-9076

Publikationsdatum

14.05.2019

Publikationsstatus

Veröffentlicht

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Physik und Astronomie (insg.), Physikalische und Theoretische Chemie

Elektronische Version(en)

https://doi.org/10.1039/c9cp00281b (Zugang: Offen)