TY - JOUR

T1 - Nanoplatelet cryoaerogels with potential application in photoelectrochemical sensing

AU - Schlosser, Anja

AU - Meyer, Lea C.

AU - Lübkemann, Franziska

AU - Miethe, Jan F.

AU - Bigall, Nadja C.

N1 - Funding Information: The authors would like to acknowledge the German Federal Ministry of Education and Research (BMBF) within the frame-work of the program NanoMatFutur, support code 03X5525. Furthermore, the project leading to these results has in part received funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation program (grant agreement 714429). In addition, this work was funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany’s excellence strategy within the cluster of excellence PhoenixD (EXC 2122, project ID 390833453) and the grant BI 1708/4-1. A. S. is thankful for financial support from the Hannover School for Nanotechnology (hsn). The authors moreover thank Rasmus Himstedt for help with TEM analysis, Armin Feldhoff as well as Jürgen Caro for providing the SEM and XRD facilities, and Mandy Jahns and Peter Behrens for krypton physisorption measurements.

PY - 2019/5/14

Y1 - 2019/5/14

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=85065617461&partnerID=8YFLogxK

U2 - 10.1039/c9cp00281b

DO - 10.1039/c9cp00281b

M3 - Article

C2 - 30839040

AN - SCOPUS:85065617461

VL - 21

SP - 9002

EP - 9012

JO - Physical Chemistry Chemical Physics

JF - Physical Chemistry Chemical Physics

SN - 1463-9076

IS - 18

ER -