Charge transport in zirconium doped anatase nanowires dye-sensitized solar cells: Trade-off between lattice strain and photovoltaic parameters

Journal Article · Mon Oct 13 00:00:00 EDT 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4898091· OSTI ID:22350930

Archana, P. S.; Gupta, Arunava ^[1]; Yusoff, Mashitah M.; Jose, Rajan ^[2]

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1. Department of Chemistry, University of Alabama, 250 Hackberry Lane, Shelby hall, Tuscaloosa 35401 Alabama (United States)
2. Faculty of Industrial Sciences and Technology, Universiti Malaysia Pahang, 26300 Kuantan (Malaysia)

Zirconium (Zr) is doped up to 5 at. % in anatase TiO{sub 2} nanowires by electrospinning and used as working electrode in dye-sensitized solar cells. Variations observed in the photovoltaic parameters were correlated by electrochemical impedance spectroscopy, open circuit voltage decay, and X-ray diffraction measurements. Results show that homovalent substitution of Zr in TiO{sub 2} increased the chemical capacitance and electron diffusion coefficient which in turn decreased charge transport resistance and charge transit time. However, lattice strain due to size mismatch between the Zr{sup 4+} and Ti{sup 4+} ions decreased open circuit voltage and fill factor thereby setting a trade-off between doping concentration and photovoltaic properties.

• OSTI ID: 22350930
• Journal Information: Applied Physics Letters, Vol. 105, Issue 15; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CAPACITANCE
CHARGE TRANSPORT
DIFFUSION
DOPED MATERIALS
ELECTRIC POTENTIAL
ELECTROCHEMISTRY
ELECTRODES
ELECTRONS
FILL FACTORS
NANOWIRES
PHOTOVOLTAIC EFFECT
QUANTUM WIRES
SOLAR CELLS
SPECTROSCOPY
STRAINS
TITANIUM IONS
TITANIUM OXIDES
X-RAY DIFFRACTION
ZIRCONIUM ADDITIONS