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标题：Optical and electrical characteristics of p-type AlN co-doped ZnO thin films synthesized by RF sputtering
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作者：A. Ismail ; M.J. Abdullah ; M.A. Qaeed 等
期刊名称：Journal of King Saud University - Science
印刷版ISSN：1018-3647
出版年度：2021
卷号：33
期号：1
页码：1-7
DOI：10.1016/j.jksus.2020.10.026
语种：English
出版社：Elsevier
摘要：AbstractZinc oxide (ZnO) has attracted significant interest due to its exceptional material characteristics like its wide band gap (3.37 eV) and the high exciton binding energy. However, the application of ZnO is constrained by the difficulty in obtaining P-type samples. In this study, p- type ZnO thin films were fabricated using the co-doping technique with ZnO and AlN targets. Different RF powers were used for ZnO to deposite the films. However, the power on AlN target was fixed at 90 W. The structural, optical and electrical properties of the prepared films were inspected. The results of XRD showed that all the films exhibited ZnO (002) peak of wurzite structure. The UV emission peaks (3.24 eV–3.53 eV) identified in PL spectra is possibly due to the recombination of free excitons. The Raman peaks which shown at 576.22 cm−1and 274 cm−1denote ZnO:AlN and ZnO:N respectively. The Hall measurements of the films deposited at RF powers of 250 W and 200 W for ZnO target exhibited n-type conduction with corresponding mobilities of 2.75 cm2V−1s−1and 1.58 cm2V−1s−1respectively with electron concentrations of 2.35 × 1018cm−3and 5.26 × 1018cm−3, respectively. However, the films deposited using RF powers of (150, 175) W and 225 W for ZnO target exhibited p-type conduction with hole concentrations of 2.14 × 1017cm−3, 2.37 × 1019cm−3and 3.68 × 1021cm−3with corresponding mobilities of 9.21 cm2V−1s−1, 0.129 cm2V−1s−1and 3.41 × 10−3cm2V−1s−1respectively. Therefore, RF power values of (150, 175) W and 225 W might be ideal for dopants activation to obtain p-type ZnO.
关键词：Optical properties;Zinc oxide;X-ray diffraction;Electrical properties