Ca-Doped ZnO:Al Thin Films: Synthesis and Characterization
Source abstract
Abstract
We unveiled the effect of doping on the morpho-structural and opto/electrical properties of Ca-doped ZnO:Al thin films obtained by RF magnetron sputtering. Scanning electron microscopy (SEM) was performed to reveal the surface morphology, while the composition and crystal structure were investigated by energy dispersive X-ray spectroscopy (EDX) and X-ray diffraction (XRD). The correlation between the microstructure and the electrical conductivity identifies an increase in electrical conductivity up to 145 × 10−3 Ω−1·m−1 at 5 wt.% Ca doping level with the decrease in the grain size. Furthermore, the presence of Ca dopant triggers the occurrence of the emission peak at 430 nm and an increase of the green emission peak in PL spectra. Corroborating the electrical measurements with X-ray diffraction and optical measurements, one can infer that the electrical conductivity is dominated by intrinsic defects developed during deposition and by the existence of dopants.
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Research context
OpenAlex topics: ZnO doping and properties · Copper-based nanomaterials and applications · Electronic and Structural Properties of Oxides
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
National Institute for Research and Development in Microtechnologies, 126A Erou Iancu Nicolae Street, Ilfov County, 077190 Voluntari, Romania
Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, Gheorghe Polizu Street 1-7, 011061 Bucharest, Romania
Funding
Romanian Ministry of Education and Research, CCCDI - UEFISCDI
References (31)
Show source-provided references
1. Effect of substrate temperature on F and Al co-doped ZnO films deposited by radio frequency magnetron sputtering10.1016/j.solener.2019.09.095 ↗
2. Photovoltaic properties of low-damage magnetron-sputtered n-type ZnO thin film/p-type Cu2O sheet heterojunction solar cells10.1016/j.tsf.2020.137825 ↗
3. Transparent ZnO thin-film transistor fabricated by rf magnetron sputtering10.1063/1.1553997 ↗
4. Preparation and characterization of Mg, Al and Ga co-doped ZnO transparent conductive films deposited by magnetron sputtering10.1016/j.rinp.2019.102514 ↗
5. Sol-gel derived Al and Ga codoped ZnO thin films: An optoelectronic study10.1016/j.apsusc.2013.11.062 ↗
6. High Temperature Annealing of ZnO:Al on Passivating POLO Junctions: Impact on Transparency, Conductivity, Junction Passivation, and Interface, Stability10.1109/JPHOTOV.2018.2878337 ↗
7. Physical properties of metal-doped ZnO thin films prepared by RF magnetron sputtering at room temperature10.1007/s10008-019-04312-7 ↗
8. Investigation of electronic and optical properties in Al-Ga codoped ZnO thin films10.1016/j.cap.2011.09.008 ↗
9. Properties of Al-Ga co-doped ZnO semiconductor thin films deposited on polyethylene terephthalate substrates by radio frequency magnetron sputtering10.1016/j.tsf.2018.03.077 ↗
10. The role of Ga and Bi doping on the local structure of transparent zinc oxide thin films10.1016/j.jallcom.2021.159489 ↗
11. Electrical and magnetic properties of (Al, Co) co-doped ZnO films deposited by RF magnetron sputtering10.1016/j.surfcoat.2018.10.105 ↗
12. Effect of substrate temperature on transparent conducting Al and F co-doped ZnO thin films prepared by rf magnetron sputtering10.1016/j.apsusc.2016.02.161 ↗
13. Electronic structure and phase stability of MgO, ZnO, CdO, and related ternary alloys10.1103/PhysRevB.77.245209 ↗
14. Robust transparent and conductive gas diffusion multibarrier based on Mg- and Al-doped ZnO as Indium tin oxide-free electrodes for organic electronics10.1021/acsami.8b08951 ↗
15. Role of zinc interstitial defects in indium and magnesium codoped ZnO transparent conducting films10.1016/j.apsusc.2019.06.245 ↗
16. Enhanced performance of novel calcium/aluminum co-doped zinc oxide for CO2 sensors10.1016/j.snb.2016.07.155 ↗
17. Photoluminescence and enhanced photocatalytic activity of ZnO nanoparticles through incorporation of metal dopants Al and Ca10.1016/j.ijleo.2019.163706 ↗
18. Microscopic investigations of morphology and thermal properties of ZnO thin films grown by atomic layer deposition method
19. Structural and optical characterization of nitrogen and gallium co-doped ZnO thin films, deposited by sol-gel method10.1016/j.molstruc.2020.127773 ↗
20. Effect of tungsten doping on the ammonia vapour sensing ability of ZnO thin films prepared by a cost effective simplified spray technique
21. Factors controlling conductivity of PEDOT deposited using oxidative chemical vapor deposition10.1016/j.apsusc.2019.144105 ↗
22. Methane as a novel doping precursor for deposition of highly conductive ZnO thin films by magnetron sputtering10.1016/j.vacuum.2020.109199 ↗
23. Optoelectronic properties of Cr doped ZnO thin films deposited by RF magnetron sputtering using a powder target10.1016/j.jallcom.2019.152739 ↗
24. A perspective on morphology controlled synthesis of powder by tuning chemical diffusion and reaction10.1016/j.apt.2019.12.008 ↗
25. Role of oxygen concentrations on structural and optical properties of RF magnetron sputtered ZnO thin films10.1007/s11082-019-2076-5 ↗
26. The Scherrer Formula for X-Ray Particle Size Determination10.1103/PhysRev.56.978 ↗
27. Waseda, K., Matsubara, Y., and Shinoda, E. (2011). X-ray Diffraction Crystallography, Springer. [1st ed.].10.1007/978-3-642-16635-8 ↗
28. Effect of defect interactions with interstitial Ag in the lattice of BixSb2−xTe3 alloys and their thermoelectric properties10.1063/5.0040808 ↗
29. Diffusion in epitaxial (1120) ZnO thin films10.1007/s11664-004-0052-7 ↗
30. Carrier concentration of calcium zinc oxide with different calcium contents deposited through spray pyrolysis10.1007/s00542-018-3749-x ↗
31. Influence of defects on electrical properties of electrodeposited co-doped ZnO nanocoatings10.1088/2053-1591/aa5135 ↗