Preparation and characterization of ZnO/ZnAl2O4-mixed metal oxides for dye-sensitized photodetector using Zn/Al-layered double hydroxide as precursor
Document Type
Article
Publication Date
1-1-2019
Abstract
In this article, a simple new technique has been developed for the preparation of ZnO/ZnAl2O4-mixed metal oxide (MMO) as anode materials for visible light dye-sensitized (DS) photodetector using Zn/Al-layered double hydroxide (LDH) as precursor. Subsequently, a detailed correlation between the structural properties of the prepared samples and the photo-responsive behavior of the fabricated DS photodetectors was elucidated. Specifically, it is evidenced that a high surface area of the prepared mesoporous MMO anode materials exhibit excellent dye absorptivity and thus facilitate free electron transfer and increase the photocurrent in the fabricated DS photodetector. A significant bathochromic shift was observed in the optical energy of the prepared MMO samples under the increment of molar ratio, providing a short electron transfer pathway in the optimized Z7A DS photodetector, which in turn demonstrated photo-responsivity and photo-detectivity of 6 mA/W and 1.7 × 10+10 Jones, respectively. This work presents an alternative approach for the design of an eco-friendly MMO-based DS photodetector. [Figure not available: see fulltext.]. © 2019, Springer Nature B.V.
Keywords
Dye-sensitized photodetector, Layered double hydroxide, Mixed metal oxide, Nanostructures, Photo-responsivity
Divisions
fac_eng,PHYSICS
Funders
Ministry of Higher Education, and the University of Malaya, Malaysia: Postgraduate Research Grants (PG030-2015B), and (PG041-2015B) and Fundamental Research Grant Scheme (FRGS) FP064-2016
Publication Title
Journal of Nanoparticle Research
Volume
21
Issue
3
Publisher
Springer Verlag