Microwave-assisted synthesis of Mg∶PbI2 nanostructures and their structural,morphological,optical,di

• 作 者: Mohd. Shkir Ziaul Raza Khan T Alshahrani Kamlesh V. Chandekar M Aslam Manthrammel Ashwani Kumar S AlFaify
• 机 构: Advanced Functional Materials and Optoelectronics Laboratory (AFMOL),Department of Physics,College o
• 出 处: 中国物理B（英文版）
• 发表日期: 2020年11期
• 关键词: Mg∶PbI2 nanostructures structural properties optical band gap dielectric constan

This work reports the cost-effective growth of Mg∶Pbl2 nanostructures with 0,1,2.5 and 5.0 wt.％ Mg doping concen-trations.Structural,vibrational,morphological properties are analyzed using x-ray diffraction(XRD),Raman spectroscopy and scanning electron microscopy(SEM).XRD and Raman studies confirm the monophasic hexagonal system of Mg∶Pbl2,and no additional impurity peaks are detected.The Scherrer formula is used to determine sizes of crystallites to be in the range of 47-52 nm.EDX/SEM e-mapping analyses confirm the incorporation of Mg in Pbl2 matrix and its uniform dis-tribution throughout the sample.The hexagonal nanosheet-and nanoplate-like morphologies are detected in SEM images for pure and Mg-doped Pbl2.An optical band gap of nanostructures is obtained from Tauc's relation to be in the range 3.0-3.25 eV.Dielectric and electrical properties are found in significant enhancement as Mg doping in Pbl2 matrix,also the conduction mechanism is discussed.