We exploit TiO2 surface functionalization as a tool to induce the crystallization process of CH3NH3PbI3-xClx perovskite thin films resulting in a reduction of the degree of orientation of the (110) crystallographic planes. Notably, the variation of the film crystalline orientational order does not affect the photovoltaic performances of the perovskite-based devices, whose efficiency remains mostly unchanged. Our findings suggest that other factors are more significant in determining the device efficiency, such as the non-homogenous coverage of the TiO2 surface causing charge recombination at the organic/TiO2 interface, defect distribution on the perovskite bulk and at the interfaces, and transport in the organic or TiO2 layer. This observation represents a step towards the comprehension of the perovskite film peculiarities influencing the photovoltaic efficiency for high performance devices.

Guerra, V., Altamura, D., Trifiletti, V., Colella, S., Listorti, A., Giannuzzi, R., et al. (2015). Implications of TiO2 surface functionalization on polycrystalline mixed halide perovskite films and photovoltaic devices. JOURNAL OF MATERIALS CHEMISTRY. A, 3(41), 20811-20818 [10.1039/c5ta05220c].

Implications of TiO2 surface functionalization on polycrystalline mixed halide perovskite films and photovoltaic devices

Trifiletti, V;
2015

Abstract

We exploit TiO2 surface functionalization as a tool to induce the crystallization process of CH3NH3PbI3-xClx perovskite thin films resulting in a reduction of the degree of orientation of the (110) crystallographic planes. Notably, the variation of the film crystalline orientational order does not affect the photovoltaic performances of the perovskite-based devices, whose efficiency remains mostly unchanged. Our findings suggest that other factors are more significant in determining the device efficiency, such as the non-homogenous coverage of the TiO2 surface causing charge recombination at the organic/TiO2 interface, defect distribution on the perovskite bulk and at the interfaces, and transport in the organic or TiO2 layer. This observation represents a step towards the comprehension of the perovskite film peculiarities influencing the photovoltaic efficiency for high performance devices.
Articolo in rivista - Articolo scientifico
Chemistry (all); Renewable Energy, Sustainability and the Environment; Materials Science (all)
English
2015
3
41
20811
20818
none
Guerra, V., Altamura, D., Trifiletti, V., Colella, S., Listorti, A., Giannuzzi, R., et al. (2015). Implications of TiO2 surface functionalization on polycrystalline mixed halide perovskite films and photovoltaic devices. JOURNAL OF MATERIALS CHEMISTRY. A, 3(41), 20811-20818 [10.1039/c5ta05220c].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/197882
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