A surface photovoltage study of surface defects on Co-doped TiO2 thin films deposited by spray pyrolysis

Abstract:

Surface photovoltage (SPV) spectroscopy is a powerful tool for studying electronic defects on semiconductor surfaces, at interfaces, and in bulk for a wide range of materials. Undoped and Cobalt-doped TiO 2 (CTO) thin films were deposited on Crystalline Silicon (c-Si) and Flourine doped Tin oxide (SnO 2 :F) substrates by chemical spray pyrolysis at a substrate temperature of 400 °C. The concentration of the Co dopant in the films was determined by Rutherford backscattering spectrometry and ranged between 0 and 4.51 at %. The amplitude of the SPV signals increased proportionately with the amount of Co in the films, which was a result of the enhancement of the slow processes of charge separation and recombination. Photogenerated holes were trapped at the surface, slowing down the time response and relaxation of the samples. The surface states were effectively passivated by a thin In 2 S 3 over-layer sprayed on top of the TiO 2 and CTO films.

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APA

Henry, W (2024). A surface photovoltage study of surface defects on Co-doped TiO2 thin films deposited by spray pyrolysis. Afribary. Retrieved from https://tracking.afribary.com/works/a-surface-photovoltage-study-of-surface-defects-on-co-doped-tio2-thin-films-deposited-by-spray-pyrolysis

MLA 8th

Henry, Wafula "A surface photovoltage study of surface defects on Co-doped TiO2 thin films deposited by spray pyrolysis" Afribary. Afribary, 30 Mar. 2024, https://tracking.afribary.com/works/a-surface-photovoltage-study-of-surface-defects-on-co-doped-tio2-thin-films-deposited-by-spray-pyrolysis. Accessed 09 Mar. 2025.

MLA7

Henry, Wafula . "A surface photovoltage study of surface defects on Co-doped TiO2 thin films deposited by spray pyrolysis". Afribary, Afribary, 30 Mar. 2024. Web. 09 Mar. 2025. < https://tracking.afribary.com/works/a-surface-photovoltage-study-of-surface-defects-on-co-doped-tio2-thin-films-deposited-by-spray-pyrolysis >.

Chicago

Henry, Wafula . "A surface photovoltage study of surface defects on Co-doped TiO2 thin films deposited by spray pyrolysis" Afribary (2024). Accessed March 09, 2025. https://tracking.afribary.com/works/a-surface-photovoltage-study-of-surface-defects-on-co-doped-tio2-thin-films-deposited-by-spray-pyrolysis

A surface photovoltage study of surface defects on Co-doped TiO2 thin films deposited by spray pyrolysis

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