A simulation model for PLZT based ferroelectric photovoltaic devices, II. Influence on charge transport and photovoltaic parameters with ITO top and Pt bottom electrodes

This work is an extension of our previously developed photovoltaic (PV) model with ferroelectric PLZT as photoactive layer, metal Pt as top and bottom electrodes. Pt electrodes result in good ferroelectric properties but lower PV output, as seen from our model. We developed a new PLZT PV model with...

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Bibliographic Details
Published in:Ferroelectrics 2018-11, Vol.536 (1), p.132-145
Main Authors: Batra, Vaishali, Kotru, Sushma
Format: Article
Language:English
Subjects:
Abbreviations
Carrier density
Charge transport
Circuits
Computer simulation
Conduction bands
Current carriers
Current density
Dependence
Electrodes
Energy conversion efficiency
ferroelectric
Ferroelectric materials
Ferroelectricity
Indium tin oxides
ITO
Lanthanum
Lead lanthanum zirconate titanate
Lead zirconate titanates
Mathematical models
Open circuit voltage
Optics
Parameters
photovoltaic
Photovoltaic cells
Photovoltaics
Platinum
PLZT
Simulation
Solar cells
Thickness
Thin films
Tin
transparent electrode
Transport properties
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Summary:This work is an extension of our previously developed photovoltaic (PV) model with ferroelectric PLZT as photoactive layer, metal Pt as top and bottom electrodes. Pt electrodes result in good ferroelectric properties but lower PV output, as seen from our model. We developed a new PLZT PV model with ITO as top electrode and Pt as bottom electrode using a semiconducting thin-film optics simulation (SETFOS) software. Dependence of PV characteristics such as open circuit voltage ( and short circuit current density ) and charge transport properties such as carriers' concentration, current density and recombination on the model parameters were investigated. The parameters including thickness of interface layer (between PLZT and ITO top electrode), thickness and work function of ITO top electrode were optimized, which were used to obtain and of the simulated model. and of the simulated and the experimental device matched closely. Charge carriers' concentration and current density of the PLZT layer with ITO and Pt as top electrodes were compared. These properties show that ITO top electrode enhances the charge transport in PLZT, which results in higher and of the PV device. Abbreviations. PV: Photovoltaic; FE: ferroelectric; PLZT: lanthanum doped lead zirconate titanate; SETFOS: semiconducting thin-film optics simulation software; ITO: Indium tin oxide; Pt: Platinum; E c : conduction band; E v : valence band, : short circuit current density, : open circuit voltage; PCE: power conversion efficiency, : recombination current; IL: interface layer; ITO et : ITO top electrode; Pt et : Pt top electrode, : total current, : electron current density, : hole current density, electron concentration, hole concentration
ISSN:0015-0193
1563-5112
DOI:10.1080/00150193.2018.1528936