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Title: p-Type NiO Hybrid Visible Photodetector
Authors: Mallows, John
Planells, Miguel
Thakare, Vishal
Bhosale, Reshma
Robertson, Neil
Dept. of Physics
Keywords: Photodetector
Nickel oxide
Surface modifier
Oxygen vacancies
Pulsed laser deposition
Issue Date: Dec-2015
Publisher: American Chemical Society
Citation: ACS Applied Materials & Interfaces, 7(50), 27597-27601.
Abstract: A novel hybrid visible-light photodetector was created using a planar p-type inorganic NiO layer in a junction with an organic electron acceptor layer. The effect of different oxygen pressures on formation of the NiO layer by pulsed laser deposition shows that higher pressure increases the charge carrier density of the film and lowers the dark current in the device. The addition of a monolayer of small molecules containing conjugated π systems and carboxyl groups at the device interface was also investigated and with correct alignment of the energy levels improves the device performance with respect to the quantum efficiency, responsivity, and photogeneration. The thickness of the organic layer was also optimized for the device, giving a responsivity of 1.54 × 10–2 A W–1 in 460 nm light.
ISSN: 1944-8244
Appears in Collections:JOURNAL ARTICLES

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