Determination of carrier lifetime and mobility in colloidal quantum dot films via impedance spectroscopy

Rath, Arup K., Lasanta, Tania, Bernechea, Maria ORCID: https://orcid.org/0000-0003-2800-6845, Diedenhofen, Silke L. and Konstantatos, Gerasimos 2014. Determination of carrier lifetime and mobility in colloidal quantum dot films via impedance spectroscopy. Applied Physics Letters 104 (6) , 063504. 10.1063/1.4865089

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Abstract

Impedance Spectroscopy (IS) proves to be a powerful tool for the determination of carrier lifetime and majority carrier mobility in colloidal quantum dot films. We employ IS to determine the carrier lifetime in PbS quantum dot Schottky solar cells with Al and we verify the validity of the technique via transient photovoltage. We also present a simple approach based on an RC model that allows the determination of carrier mobility in PbS quantum dot films and we corroborate the results via comparison with space charge limited measurements. In summary, we demonstrate the potential of IS to characterize key-to-photovoltaics optoelectronic properties, carrier lifetime, and mobility, in a facile way.

Item Type:	Article
Date Type:	Published Online
Status:	Published
Schools:	Engineering
Subjects:	Q Science > QC Physics
Publisher:	American Institute of Physics
ISSN:	0003-6951
Date of First Compliant Deposit:	11 August 2016
Date of Acceptance:	21 January 2014
Last Modified:	05 May 2023 04:36
URI:	https://orca.cardiff.ac.uk/id/eprint/93778

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