The Sb 2S 3-sensitized photoelectrochemical cells (Sb 2S 3-SPECs) in cobalt electrolyte were fabricated by depositing Sb 2S 3 on the macroporous TiO 2 nanorods electrodes and consecutively spin-coating P3HT (Poly-3-hexylthiophene) interlayer to relieve the mass transport problem at vicinity of Sb 2S 3 and cobalt redox couples and reduce the backward recombination. Through the introduction of P3HT interlayer, we could greatly enhance the power conversion efficiency of Sb 2S 3-SPEC to 4.2% at 1 sun illumination, whereas the Sb 2S 3-SPEC without P3HT interlayer exhibits 3.2% of device efficiency. The electrochemical impedance analysis let us know that the improved device performance was mainly attributed to the reduced backward recombination building up the higher open circuit voltage.
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Electronic, Optical and Magnetic Materials
- Surfaces, Coatings and Films