TiO2/Cu2O all-oxide heterojunction solar cells produced by spray pyrolysis

Michele Pavan; Sven Rühle; Adam Ginsburg; David A. Keller; Hannah Noa Barad; Paolo M. Sberna; Daniela Nunes; Rodrigo Martins; Assaf Y. Anderson; Arie Zaban; Elvira Fortunato

doi:10.1016/j.solmat.2014.10.005

TiO₂/Cu₂O all-oxide heterojunction solar cells produced by spray pyrolysis

Michele Pavan
, Sven Rühle
, Adam Ginsburg
, David A. Keller
, Hannah Noa Barad
, Paolo M. Sberna
, Daniela Nunes
, Rodrigo Martins
, Assaf Y. Anderson
, Arie Zaban
, Elvira Fortunato

Department of Chemistry

NOVA University Lisbon
Bar-Ilan University
University of Catania

Research output: Contribution to journal › Article › peer-review

188 Scopus citations

Abstract

Here we present for the first time a TiO₂/Cu₂O all-oxide heterojunction solar cell entirely produced by spray pyrolysis onto fluorine doped tin oxide (FTO) covered glass substrates, using silver as a back contact. A combinatorial approach was chosen to investigate the impact of the TiO₂ window layer and the Cu₂O light absorber thicknesses. We observe an open circuit voltage up to 350 mV and a short circuit current density which is strongly dependent of the Cu₂O thickness, reaching a maximum of ~0.4 mA/cm². Optical investigation reveals that a thickness of 300 nm spray pyrolysis deposited Cu₂O is sufficient to absorb most photons with an energy above the symmetry allowed optical transition of 2.5 eV, indicating that the low current densities are caused by strong recombination in the absorber that consists of small Cu₂O grains.

Original language	English
Pages (from-to)	549-556
Number of pages	8
Journal	Solar Energy Materials and Solar Cells
Volume	132
DOIs	https://doi.org/10.1016/j.solmat.2014.10.005
State	Published - Jan 2015

Bibliographical note

Publisher Copyright:
© 2014 Elsevier Ltd. All rights reserved.

Funding

This study was funded by the European Commission under the FP7 AllOxidePV project “Novel Composite Oxides by Combinatorial Material Synthesis for Next Generation All-Oxide-Photovoltaics” number 309018 and the FP7 ERC AdG project “Transparent Electronics” number 228144 . Moreover this work was partially funded by the Portuguese Science Foundation (FCT-MEC) through projects EXCL/CTM-NAN/0201/2012 and PEst-C/CTM/LA0025/2013-14 .

Funders	Funder number
FCT-MEC	PEst-C/CTM/LA0025/2013-14, EXCL/CTM-NAN/0201/2012
FP7 ERC
Seventh Framework Programme	692373, 228144, 309018
European Commission
Fundação para a Ciência e a Tecnologia

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

All-oxide-photovoltaics
High throughput characterization
Spray pyrolysis
TiO/CuO heterojunction

Access to Document

10.1016/j.solmat.2014.10.005

Cite this

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title = "TiO2/Cu2O all-oxide heterojunction solar cells produced by spray pyrolysis",

abstract = "Here we present for the first time a TiO2/Cu2O all-oxide heterojunction solar cell entirely produced by spray pyrolysis onto fluorine doped tin oxide (FTO) covered glass substrates, using silver as a back contact. A combinatorial approach was chosen to investigate the impact of the TiO2 window layer and the Cu2O light absorber thicknesses. We observe an open circuit voltage up to 350 mV and a short circuit current density which is strongly dependent of the Cu2O thickness, reaching a maximum of \textasciitilde{}0.4 mA/cm2. Optical investigation reveals that a thickness of 300 nm spray pyrolysis deposited Cu2O is sufficient to absorb most photons with an energy above the symmetry allowed optical transition of 2.5 eV, indicating that the low current densities are caused by strong recombination in the absorber that consists of small Cu2O grains.",

keywords = "All-oxide-photovoltaics, High throughput characterization, Spray pyrolysis, TiO/CuO heterojunction",

author = "Michele Pavan and Sven R{\"u}hle and Adam Ginsburg and Keller, \{David A.\} and Barad, \{Hannah Noa\} and Sberna, \{Paolo M.\} and Daniela Nunes and Rodrigo Martins and Anderson, \{Assaf Y.\} and Arie Zaban and Elvira Fortunato",

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doi = "10.1016/j.solmat.2014.10.005",

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AU - Pavan, Michele

AU - Rühle, Sven

AU - Ginsburg, Adam

AU - Keller, David A.

AU - Barad, Hannah Noa

AU - Sberna, Paolo M.

AU - Nunes, Daniela

AU - Martins, Rodrigo

AU - Anderson, Assaf Y.

AU - Zaban, Arie

AU - Fortunato, Elvira

PY - 2015/1

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AB - Here we present for the first time a TiO2/Cu2O all-oxide heterojunction solar cell entirely produced by spray pyrolysis onto fluorine doped tin oxide (FTO) covered glass substrates, using silver as a back contact. A combinatorial approach was chosen to investigate the impact of the TiO2 window layer and the Cu2O light absorber thicknesses. We observe an open circuit voltage up to 350 mV and a short circuit current density which is strongly dependent of the Cu2O thickness, reaching a maximum of ~0.4 mA/cm2. Optical investigation reveals that a thickness of 300 nm spray pyrolysis deposited Cu2O is sufficient to absorb most photons with an energy above the symmetry allowed optical transition of 2.5 eV, indicating that the low current densities are caused by strong recombination in the absorber that consists of small Cu2O grains.

KW - All-oxide-photovoltaics

KW - High throughput characterization

KW - Spray pyrolysis

KW - TiO/CuO heterojunction

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