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Annealing time-dependent evolution of morphology and luminescence behavior of zinc oxide thin films

ZHEN TIAN1, LINHUA XU1,2,* , AOXIN ZANG1, WENYANG MA1

Affiliation

  1. School of Physics and Optoelectronic Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, China
  2. Laboratory for Optoelectronic Functional Materials and Devices, Nanjing University of Information Science and Technology, Nanjing 210044, China

Abstract

The tailoring of optical properties of ZnO films caused by the evolution of the morphology is a subject of great concern. In this research, Al, Fe and Cl (Al-Fe-Cl) incorporated ZnO films were deposited by the sol-gel technique and the annealing time-dependent evolution of morphology and optical properties were analyzed in detail. The results show that pyramid-like grains are formed on the film surface after annealing treatment. When the annealing time exceeds 1 h, the pyramid-like grains on the film surface begin to aggregate. With the further increase of the annealing time, the aggregation of the pyramid-like grains becomes more obvious. In addition, the increase of annealing time greatly changes the luminescence behavior of ZnO thin films.

Keywords

ZnO films, Sol-gel method, UV emission, Annealing time, Surface aggregation of grains.

Citation

ZHEN TIAN, LINHUA XU, AOXIN ZANG, WENYANG MA, Annealing time-dependent evolution of morphology and luminescence behavior of zinc oxide thin films, Optoelectronics and Advanced Materials - Rapid Communications, 17, 5-6, May-June 2023, pp.233-240 (2023).

Submitted at: Dec. 26, 2022

Accepted at: June 6, 2023