Original scientific paper

https://doi.org/10.5772/55901

Thermal Properties of TiO2/PbS Nanoparticle Solar Cells

Derek Padilla ; Department of Physics, University of California, Santa Cruz, CA, USA
Guangmei Zhai ; Department of Electronic Science and Technology, Huazhong University of Science and Technology, Wuhan, P.R. China
Alison J. Breeze ; Solexant Corporation, San Jose, CA, USA
Daoli Zhang ; Department of Electronic Science and Technology, Huazhong University of Science and Technology, Wuhan, P.R. China
Glenn B. Alers ; Department of Physics, University of California, Santa Cruz, CA, USA
Sue A. Carter ; Department of Physics, University of California, Santa Cruz, CA, USA

Abstract

Photovoltaic performance is shown to depend on ligand capping on PbS nanoparticle solar cells by varying the temperature between 140K and 350K. The thermal response of open‐circuit voltage, short‐circuit current density, fill‐factor and shunt resistance varies between the ligands. A large increase in short‐circuit current density at low temperatures is observed for 1,2‐ethanedithiol and 3‐mercaptopropionic acid and a relatively constant short-circuit current density is observed for the stiffer 1,4‐benzenedithiol. Dark data provide evidence for tunnelling transport being the dominant charge conduction mechanism for all three ligand devices with recombination occurring within deep trap states. Under illumination, devices exhibit band‐to‐band recombination, indicated by an ideality factor of nearly unity.

Keywords

temperature; charge transport; quantum dot; short-circuit current; photovoltaic

Hrčak ID:

142886

URI

https://hrcak.srce.hr/142886

Publication date:

1.1.2012.

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