FeS2 ultrathin films prepared using well-dispersed pyrite nanocrystal inks
Abstract
Well-dispersed FeS2 pyrite nanocrystal inks were produced by bead milling. They were used to produce ultrathin films of ∼55 nm thickness. After annealing at 500 °C, the film thickness decreased, the crystallinity of the films increased, and a small amount of marcasite phase appeared. Optical measurements showed that the absorption coefficient of the annealed films increased as wavelength decreased and finally reached ∼2.2 × 105 cm-1. The annealed films retained p-type semiconductors and a band gap of 0.92 eV. The resistivity and mobility of the pyrite films before and after annealing were 100 Ω cm and 6 cm2 V-1 s-1, and 0.8 Ω cm, 30 cm2 V-1 s-1, respectively.
- Publication:
-
Applied Physics Express
- Pub Date:
- January 2015
- DOI:
- 10.7567/APEX.8.015201
- Bibcode:
- 2015APExp...8a5201H