Preparation And Properties Of Semiconductor Nanomaterials

Because semiconductor nanomaterials'unique nature and quantum effect, it plays the influential role in many of functional devices, and it also have the very important influence to the development of future society.This article reported preparation process of two semiconductor nanomaterials, characterization and the optical performance test:First, preparation of AlN nanowires array studied by template method. Using self-loading to prepare orderly arrangement of PS template; then Al nanoparticles template is prepared on the PS template. In the results of different experimental condition, observing PS and Al nanoparticles template by SEM, the most efficacious method of preparation Al nanoparticles template can be confirmed; AlN nanowires array can be prepared under the best condition.The condition is 1100℃, constant time 240min, and 600torr.Second, preparation processes of ZnO thin films studied by sol-gel. C4H6O4Zn'2(H2O) is raw material, CH3OCH2CH2OH is solvent, H2NCH2CH2OH is a stabilizer, the solution were madeup according to a certain mol ratio, stiring in 60℃water bath; the ZnO thin films is synthesized using a centrifugal spin coating machine; then the film is put into the rapid heating furnace, set 10min and 300℃, natural cooling into the final films. In this thesis, different speed is researched on the structure of films, optical properties. X-ray analysis can analyse the crystalline structure of thin film samples, the results show that ZnO thin films prepared by this method has the c-axis preferred orientation, and with the spin speed increases, the (100) and (101) diffraction peak gradually disappeared, (002) diffraction peak is enhanced and broadened, account for spin-coating speed have a certain impact on the growth of crystal films. Transmitted spectrum of ZnO thin films was test by ultraviolet-visible spectrophotometer, showing that ZnO thin films has good transparency, light transmitted rate of up to 92%, and using the absorption coefficient and relationship calculates band gap of the film. With the increase of spin speed, the optical band gap increased, and the band gap of ZnO Films is adjustable.