Nanocrystalline CdSe thin film prepared by chemical solution deposition was imaged in air with a scaninng tunneling microscope(STM). Scanning tunneling current spectroscopy(STS) was taken at a fixed tip - Sample separ...Nanocrystalline CdSe thin film prepared by chemical solution deposition was imaged in air with a scaninng tunneling microscope(STM). Scanning tunneling current spectroscopy(STS) was taken at a fixed tip - Sample separation. Tunneling currnt(i) - voltage(v) curve and differential conductance spectrum show an n-type schottky rectifying behaviour and yteld a direct measure of band gap energy. An increase of bandgap energy (1.8 - 2.1eV) was measured indicating energy quantization of this particular thin film.展开更多
文摘Nanocrystalline CdSe thin film prepared by chemical solution deposition was imaged in air with a scaninng tunneling microscope(STM). Scanning tunneling current spectroscopy(STS) was taken at a fixed tip - Sample separation. Tunneling currnt(i) - voltage(v) curve and differential conductance spectrum show an n-type schottky rectifying behaviour and yteld a direct measure of band gap energy. An increase of bandgap energy (1.8 - 2.1eV) was measured indicating energy quantization of this particular thin film.
