title: p-Type NiO Hybrid Visible Photodetector.
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.
authors.affiliation: School of Chemistry, University of Edinburgh , Joseph Black Building, David Brewster Road, Edinburgh, Scotland EH9 3FJ, U.K.
authors.forename: John
authors.initials: J
authors.lastname: Mallows
authors.affiliation: School of Chemistry, University of Edinburgh , Joseph Black Building, David Brewster Road, Edinburgh, Scotland EH9 3FJ, U.K.
authors.forename: Miquel
authors.initials: M
authors.lastname: Planells
authors.affiliation: CSIR-National Chemical Laboratory , Pashan Road, Pashan, Pune, Maharashtra 411008, India.
authors.forename: Vishal
authors.initials: V
authors.lastname: Thakare
authors.affiliation: CSIR-National Chemical Laboratory , Pashan Road, Pashan, Pune, Maharashtra 411008, India.
authors.forename: Reshma
authors.initials: R
authors.lastname: Bhosale
authors.affiliation: CSIR-National Chemical Laboratory , Pashan Road, Pashan, Pune, Maharashtra 411008, India.|Department of Physics and Centre for Energy Science, Indian Institute of Science Education and Research , Dr. Homi Bhabha Road, Pune 411008, India.
authors.forename: Satishchandra
authors.initials: S
authors.lastname: Ogale
authors.affiliation: School of Chemistry, University of Edinburgh , Joseph Black Building, David Brewster Road, Edinburgh, Scotland EH9 3FJ, U.K.
authors.forename: Neil
authors.initials: N
authors.lastname: Robertson
keywords: nickel oxide; organic; oxygen vacancies; photodetector; pulsed laser deposition; surface modifier