Preparation and luminescent properties of ZnO microrods and microtubes

作者：Chen JG; Guo CX^*; Zhang LL; Hu JT

来源：Chinese Physics Letters, 2004, 21(7): 1366-1369.

Hexagonal ZnO microrods and sub-microrods have been prepared through thermal decomposition of an equimolar (0.1 M) aqueous Solution of Zn(NO3)(2).4H(2)O and (CH2)(6)N-4 at 90degreesC for different times (10-46h). The microrods were transformed into hollow hexagonal ZnO microtubes when the growth time reached 46h. The Raman spectra and the photoluminescent (PL) spectra were measured. The PL spectra of microrods consist of two strong narrow near-UV bands at 380nm and 400nm assigned to free exciton emission and exciton-exciton collision, respectively. The PL spectrum of ZnO microtubes show only one peak in the near-UV region with peak located at 380nm with FWHM of about 20 nm assigned to free exciton emission. When the growth time increased, the peak intensity of near-UV band decreased.

• 出版日期2004-7
• 单位中国科学技术大学