Ropy Foam-Like Tio2 Film Grown By Water-Based Process For Electronconduction Layer Of Perovskite Solar Cells

Abstract

Self-assembled TiO2 foam-like films, were grown by the water based Streaming Process for Electrodeless Electrochemical Deposition (SPEED). The morphology of the ∼1 μm thick films consists of a tangled ropy structure with individual strands of ∼200 nm diameter and open pores of 0.1 to 3 micron dimensions. Such films are advantageous for proposed perovskite solar cell comprising CH3NH3PbI3 absorber with additional inorganic films as contact and conduction layers, all deposited by SPEED. Lateral film resistivity is in the range 20 - 200 kω-cm, increasing with growth temperature, while sheet resistance is in the range 2 - 20 × 108 ω/Sq. Xray diffraction confirms presence of TiO2 crystals of orthorhombic class (Brookite). UV-vis spectroscopy shows high transmission below the expected 3.2 eV TiO2 bandgap. Transmittance increases with growth temperature.

Publication Date

1-1-2016

Publication Title

MRS Advances

Volume

1

Issue

46

Number of Pages

3169-3174

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

DOI Link

https://doi.org/10.1557/adv.2016.478

Socpus ID

85021674255 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85021674255

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