Ahmed S, Sarker M S I, Rahman M M, Kamruzzaman M, Khan M K R
Department of Physics, University of Rajshahi, Rajshahi 6205, Bangladesh.
Department of Physics, Begum Rokeya University, Rangpur 5400, Bangladesh.
Heliyon. 2018 Aug 18;4(8):e00740. doi: 10.1016/j.heliyon.2018.e00740. eCollection 2018 Aug.
Cadmium oxide (CdO) and yttrium (Y) doped CdO (Y: CdO) thin films have been prepared onto glass substrate at temperature 300 °C by spray pyrolysis technique. The effects of yttrium (Y) doping on the structural, morphology, optical and electrical properties were studied systematically. The X-ray diffraction (XRD) study confirms that CdO films are polycrystalline in nature with cubic structure having lattice parameter of 0.4658 nm. Surface topographic and nano-structural analysis indicates cluster grain size and porosity decreased substantially with increase of yttrium (Y) content in CdO films. The optical transmittance exhibits excellent optical transparency, with an average transmittance of >70% in the visible range for 2 to 4% yttrium (Y) doping. The optical band gap widens in Y: CdO film from 2.24 to 2.62 eV through Burstein- Moss shift. Hall measurement confirms that material is of n type with a minimum resistivity of 4.7 × 10 Ω-cm with carrier concentration of 4.2 × 10 cm were achieved for 2% yttrium (Y) doping.
通过喷雾热解技术在300℃的温度下在玻璃基板上制备了氧化镉（CdO）和钇（Y）掺杂的氧化镉（Y:CdO）薄膜。系统研究了钇（Y）掺杂对其结构、形貌、光学和电学性能的影响。X射线衍射（XRD）研究证实，CdO薄膜本质上是多晶的，具有立方结构，晶格参数为0.4658nm。表面形貌和纳米结构分析表明，随着CdO薄膜中钇（Y）含量的增加，簇晶粒尺寸和孔隙率显著降低。对于2%至4%的钇（Y）掺杂，光学透射率表现出优异的光学透明度，在可见光范围内平均透射率>70%。通过伯斯坦-莫斯位移，Y:CdO薄膜的光学带隙从2.24eV拓宽到2.62eV。霍尔测量证实该材料为n型，对于2%的钇（Y）掺杂，实现了最低电阻率为4.7×10Ω·cm，载流子浓度为4.2×10cm 。
