다양한 온도에서 열처리한 씨앗 층 위에 열수화법을 이용한 ZnO 나노 막대의 성장

  • 배영숙 (성균관대학교 신소재공학과) ;
  • 김영이 (성균관대학교 신소재공학과) ;
  • 김동찬 (성균관대학교 신소재공학과) ;
  • 공보현 (성균관대학교 신소재공학과) ;
  • 안철현 (성균관대학교 신소재공학과) ;
  • 최미경 (성균관대학교 신소재공학과) ;
  • 우창호 (성균관대학교 신소재공학과) ;
  • 한원석 (성균관대학교 신소재공학과) ;
  • 조형균 (성균관대학교 신소재공학과)
  • Published : 2009.06.18

Abstract

ZnO-based materials have been extensively studied for optoelectronic applications due to their superiors physical properties such as wide direct bandgap (~3.37 eV), large exciton binding energy (~60 meV), high transparency in the visible region, and low cost. Especially, one-dimensional (1D) ZnO nanostructures have attracted considerable attention owing to quantum confinement effect and high crystalline quality. Additionally, various nanostructures of ZnO such as nanorods, nanowires, nanoflower, and nanotubes have stimulated the interests because of their semiconducting. and piezoelectric properties. Among them, vertically aligned ZnO nanorods can bring the improved performance in various promising photoelectric fields including piezo-nanogenerators, UV lasers, dye sensitized solar cells, and photo-catalysis. In this work, we studied the effect of the annealing temperature of homo seed layers on the formation of ZnO nanorods grown by hydrothermal method. The effect of annealing temperature of seed layer on the length and orientation of the nanorods was investigated scanning electron microscopy investigation. Transmission electron microscopy and X-ray diffraction measurement were performed to understand the effect of annealing temperatures of seed layers on the formation of nanorods. Moreover, the optical properties of the seed layers and the nanorods were studied by room temperature photoluminescence.

Keywords