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Photosensitive heterojunctions of silicon coated with sol–gel derived TiO2 dispersed in poly(3,4-ethylendi oxythiophene)/poly(styrenesulfonate)

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Abstract

Sol–gel derived aggregates of titania nanocrystals, synthesized starting from alcohol–water solutions of titanium isopropoxide, were characterized by Scanning Electron Microscopy (SEM) and X-Ray Diffraction (XRD) measurements. The TiO2 powder was dispersed in aqueous solutions of poly(3,4-ethylendioxythiophene)/poly(styrenesulfonate) (PEDOT-PSS), and the blends were coated on n-doped silicon substrates to achieve simple design heterojunctions. Current versus voltage measurements performed both in the dark and under broad band light irradiation show that the nSi/PEDOT-PSS/TiO2 heterojunctions have remarkable photosensitive behaviour, promising in view of applications as hybrid photovoltaic cells.

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Authors and Affiliations

  1. Dipartimento di Fisica della Materia e Tecnologie Fisiche Avanzate, Università di Messina, Contrada di Dio, S. Agata, Messina, 98166, Italy

    A. Arena, N. Donato & G. Saitta

  2. Dipartimento di Chimica Industriale e Ingegneria dei Materiali, Università di Messina, Messina, Italy

    G. Rizzo & G. Neri

  3. Centro Interdipartimentale di Ricerca “E. Piaggio”, Università di Pisa, Pisa, Italy

    G. Pioggia

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  1. A. Arena
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  2. N. Donato
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  3. G. Saitta
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  4. G. Rizzo
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  5. G. Neri
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  6. G. Pioggia
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Correspondence to A. Arena.

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Arena, A., Donato, N., Saitta, G. et al. Photosensitive heterojunctions of silicon coated with sol–gel derived TiO2 dispersed in poly(3,4-ethylendi oxythiophene)/poly(styrenesulfonate). J Sol-Gel Sci Technol 43, 41–46 (2007). https://doi.org/10.1007/s10971-007-1559-1

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  • DOI: https://doi.org/10.1007/s10971-007-1559-1

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