Drop-dry deposition of Co3O4 and fabrication of heterojunction solar cells with electrochemically deposited ZnO. (18th August 2021)

• Record Type: Journal Article
• Authors: Li, Tong; Ichimura, Masaya
• Is Part Of: Semiconductor science and technology. Volume 36:Number 9(2021)
• Publication Date: 2021-08-18
• Subjects: drop-dry deposition -- electrochemical deposition -- Co3O4 -- ZnO -- heterojunction -- solar cell; Semiconductors -- Periodicals; 621.38152
• DOI: 10.1088/1361-6641/ac18f8
• Languages: English
• ISSNs: 0268-1242

Abstract

Abstract: Cobalt oxide (Co3 O4 ) thin films were fabricated by the drop-dry deposition (DDD) method using an aqueous solution containing Co(NO3 )2 and NaOH. DDD was performed by dropping the solution on a substrate, heating-drying, and rinsing in water. The as-deposited film was Co(OH)2, and it was converted to Co3 O4 by annealing in air. The Raman and x-ray diffraction peaks of Co3 O4 were observed for the annealed films. We also fabricated Co3 O4 /ZnO heterojunction solar cells with ZnO prepared by the electrochemical deposition method. The heterojunction had rectification properties and a weak photovoltaic response. Thus, DDD is promising for fabricating Co3 O4 layers, and the Co3 O4 /ZnO heterojunction can be used as a solar cell.