Revealing the correlation of the electrochemical properties and the hydration of inkjet printed CdSe/CdS semiconductor gels

authored by

Jan F Miethe, Franziska Luebkemann, Anja Schlosser, Dirk Dorfs, Nadja C Bigall

Abstract

The mobility of charge carriers across a semiconductor-nanoparticle-based 3D network (i.e., a gel) and the interfacial transfer of the charge carriers across the nanoparticle network/electrolyte boundary are elementary processes for applications in the fields of sensing and energy harvesting. The automated manufacturing of electrodes coated with porous networks can be realized by inkjet printing. By simultaneous printing of CdSe/CdS dot-in-rod-shaped nanorods (NRs) and the destabilization reagent, CdSe/CdS gel-network-coated electrodes can be obtained. In this work, the charge carrier mobility of the electrons and the holes within the porous CdSe/CdS nanorod gel network is investigated via photoelectrochemistry. Using linear sweep voltammograms (LSVs) and intensity-modulated photocurrent spectroscopy (IMPS), it is shown that the electron is moving within the tip-to-tip-connected CdSe/CdS NR gel structure, while the holes are trapped in the CdSe seed of the semiconductor heterostructures. Furthermore, the preparation process of gel structures is related to the elementary mechanism of hydration, which can be shown via photoelectrochemical long-term studies.

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

Langmuir

Volume

36

Pages

4757-4765

No. of pages

9

ISSN

0743-7463

Publication date

03.03.2020

Publication status

Published

Peer reviewed

Yes

ASJC Scopus subject areas

Condensed Matter Physics, General Materials Science, Spectroscopy, Surfaces and Interfaces, Electrochemistry

Electronic version(s)

https://doi.org/10.1021/acs.langmuir.9b03708 (Access: Open)