Influence of Quantum Dot Concentration on Carrier Transport in ZnO:TiO₂ Nano-Hybrid Photoanodes for Quantum Dot-Sensitized Solar Cells

Overview

Journal Nanomaterials (Basel)

Date 2017 Mar 25

PMID 28335319

Citations 1

Authors

Francis S Maloney

Uma Poudyal

Weimin Chen

Wenyong Wang

Affiliations

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Abstract

Zinc oxide nanowire and titanium dioxide nanoparticle (ZnO:TiO₂ NW/NP) hybrid films were utilized as the photoanode layer in quantum dot-sensitized solar cells (QDSSCs). CdSe quantum dots (QDs) with a ZnS passivation layer were deposited on the ZnO:TiO₂ NW/NP layer as a photosensitizer by successive ion layer adsorption and reaction (SILAR). Cells were fabricated using a solid-state polymer electrolyte and intensity-modulated photovoltage and photocurrent spectroscopy (IMVS/PS) was carried out to study the electron transport properties of the cell. Increasing the SILAR coating number enhanced the total charge collection efficiency of the cell. The electron transport time constant and diffusion length were found to decrease as more QD layers were added.

Citing Articles

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Sim L, Wong J, Hak C, Tai J, Leong K, Saravanan P Beilstein J Nanotechnol. 2018; 9:353-363.

PMID: 29515949 PMC: 5815291. DOI: 10.3762/bjnano.9.35.

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