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NANOSYSTEMS: PHYSICS, CHEMISTRY, MATHEMATICS, 2017, 8 (4), P. 540–545

Niobium-doped titanium dioxide nanoparticles for electron transport layers in perovskite solar cells

M. F. Vildanova – Department of Solar Photovoltaics, Institute of Biochemical Physics, Russian Academy of Sciences, Kosygin St. 4, Moscow, 119334, Russia; mvildanova@sky.chph.ras.ru
S. S. Kozlov – Department of Solar Photovoltaics, Institute of Biochemical Physics, Russian Academy of Sciences, Kosygin St. 4, Moscow, 119334, Russia
A. B. Nikolskaia – Department of Solar Photovoltaics, Institute of Biochemical Physics, Russian Academy of Sciences, Kosygin St. 4, Moscow, 119334, Russia
O. I. Shevaleevskiy – Department of Solar Photovoltaics, Institute of Biochemical Physics, Russian Academy of Sciences, Kosygin St. 4, Moscow, 119334, Russia
N. A. Tsvetkov – Department of Solar Photovoltaics, Institute of Biochemical Physics, Russian Academy of Sciences, Kosygin St. 4, Moscow, 119334, Russia
O.V. Alexeeva – Department of Solar Photovoltaics, Institute of Biochemical Physics, Russian Academy of Sciences, Kosygin St. 4, Moscow, 119334, Russia
L. L. Larina – Department of Solar Photovoltaics, Institute of Biochemical Physics, Russian Academy of Sciences, Kosygin St. 4, Moscow, 119334, Russia

Nb-doped TiO2 nanoparticles with different doping concentrations, varied from 0 to 2.7 mol.%, were prepared by the sol-gel method followed by thermal treatment. The obtained nanoparticles were used to fabricate a series of electron transport layers for constructing perovskite solar cells (PSCs). The prepared layers were characterized using X-ray diffraction and optical transmission measurements. The effects of Nb doping concentration in TiO2 layers on the optical absorption behavior, the morphology and charge carrier dynamics were studied. A series of PSCs, based on the developed electron transport layers was fabricated and examined. It was found that PSC fabricated with 2.7 mol.% Nb content TiO2 electron transport layer have shown up to 19 % improvement of a power conversion efficiency compared to that, based on an un-doped TiO2 layer.

Keywords: nanoparticles, sol-gel method, Nb-doped TiO2, thin films, semiconductors, solar photovoltaics, perovskite solar cells.

PACS 73.63.Bd

DOI 10.17586/2220-8054-2017-8-4-540-545

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