Abstract
Visible-light-active coordination metallopolymer and metal-organic frameworks have gained substantial attention in recent years, owing to their tunable electronic properties. Herein, we present a novel copper-ion-containing metallopolymer, which exhibits visible-light absorption and p-type photoelectrochemical behavior. The functional thiadiazole-based metallopolymer thin films were prepared by using both chemical and electrochemical methods on fluorine-doped tin oxide substrates. XPS, Raman, and FTIR spectral investigations evidence the presence of Cu(II), Cu(I), Cu−S, and disulfide (S−S)2− linkages in the polymeric network. The swift photoresponses, repeatable photovoltage of approximately 55 mV with zero applied current, and high photocurrent values at different bias potentials (ca. 24 μA cm−2 @ −0.6 V vs. Ag/AgCl in 0.1 KCl) in acidic electrolytes (0.5 M H2SO4) suggest that this metallopolymer as an acid-stable p-type photocathode material. In contrast, the electropolymerized non-metallated polymers exhibit n-type photoactivity. Photoelectrochemical sensing studies reveal the analyte-induced reduction in photoactivity.
Original language | English |
---|---|
Pages (from-to) | 3847-3853 |
Number of pages | 7 |
Journal | ChemElectroChem |
Volume | 5 |
Issue number | 24 |
DOIs | |
State | Published - 10 Dec 2018 |
Externally published | Yes |
Keywords
- metallopolymers
- p-type semiconductor
- photocathodes
- photoelectrochemical sensing
- thiadiazoledithiol
ASJC Scopus subject areas
- Catalysis
- Electrochemistry