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Elsevier, Solar Energy Materials and Solar Cells, 7(94), p. 1227-1234

DOI: 10.1016/j.solmat.2010.03.011

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Nb-TiO2/polymer hybrid solar cells with photovoltaic response under inert atmosphere conditions

Journal article published in 2010 by Monica Lira-Cantu ORCID, Mahbube Khoda Siddiki, Mahbube Khoda Siddiki, David Muñoz-Rojas, Roger Amade, Natalia I. González Pech ORCID
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This paper is available in a repository.

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Abstract

Hybrid Solar Cells (HSC) applying Nb-TiO2 in direct contact with a conducting organic polymer, MEH-PPV, show higher stability than the bare TiO2-based HSC when analyzed under inert atmosphere conditions. IPCE analyses revealed that inert atmospheres affect directly the semiconductor oxide in the first stages of the analyses but photovoltaic performance stabilizes after several hours. A 20 wt% Nb-doped TiO2 presented the highest stability and photovoltaic properties. The behavior has been attributed to the solubility limit of Nb within the TiO2 beyond 20 wt% doping level where the co-existence of NbO2 is observed. The HSCs were analyzed under controlled N2 atmosphere and 1000 W/m2 (AM 1.5) irradiation.