Subjects: Materials Science >> Materials Science (General) submitted time 2023-03-18 Cooperative journals: 《材料研究学报》
Abstract: ZnO nanorods arrays were synthesized by hydrothermal method from an aqueous solution of Zn(CH3COO)2 and C6H12N4 with additives of NH4NO3 and Al(NO3)3. The results show that the use of NH4NO3 in the solution leads to a decrease in nonradiative recombination centers in the ZnO nanorods by lowering their defect density. The reduction of the nonradiative recombination in ZnO nanorods results in a descent in the Stokes shift of the nanorods by 49%. In addition, the optical band gap of the ZnO nanorods could be adjusted in a range of 3.36-3.57 eV by controlling the additives concentration in the solution. The increase of the carrier concentration as a result of the Al doping leads to a blue shift of the optical band gap of the ZnO nanorods to 3.56-3.57 eV, which can be ascribed to the Burstein-Moss effect.