Photoelectrochemical studies on aqueous suspensions of 3-dodecyl 2-5 di-thionyl pyrrole/metal oxide photoactive interfaces

• Published in: Surface and interface analysis 2011-12, Vol.43 (12), p.1527-1531
• Main Author: Kasem, Kasem K.
• Format: Article
• Language: English
• Subjects: 3-DODTh-Py; colloidal; Colloids; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Condensed matter: structure, mechanical and thermal properties; COPPER OXIDE; Cross-disciplinary physics: materials science; rheology; CUPROUS OXIDE; Electron affinity; Electronegativity; ELECTRONIC STRUCTURE; Exact sciences and technology; interface; INTERFACES; Metal oxides; MICA; MONOMERS; nanoparticles; OXIDES; photoelectrochemistry; Photonics; Physics; Pyrroles; SEMICONDUCTORS
• ISSN: 0142-2421; 1096-9918; 1096-9918
• DOI: 10.1002/sia.3747

Colloidal ZnO, Fe2O3 and Cu2O solutions were used to explore photonic activities at metal oxides/organic semiconductors interfaces. Fluorescence spectroscopic and dynamic electrochemical techniques were performed on colloidal metal oxides articles modified with 3‐dodecyl 2–5 di‐thionyl pyrrole (3‐DODTh‐Py) to investigate the quantum absorbance efficiency at this inorganic/organic interface (IOI). The IOI assemblies were p‐n junction‐type interfaces, where 3‐DODTh‐Py) functions as electron donor. Results were interpreted using the optical and electrochemical parameters of the organic monomer such as IP (ionization potential), EA (electron affinity), and Eg (Energy band gap), and the barrier height at the IOI interface. One of the driving forces for great absorption at IOI was the great difference in electronegativity between inorganic and organic interface. Copyright © 2011 John Wiley & Sons, Ltd.