Control of the shell structure of ZnO–ZnS core-shell structure
Source abstract
Abstract
Nanostructured ZnO–ZnS core-shell powders were synthesized through a solution method using a thioacetamide (TAA) solution in deionized water. ZnO powder and TAA solution were employed to supply zinc and sulfur ions to form the ZnO–ZnS core-shell structures. The structure of the ZnS shell was strongly affected by the mole concentration of the TAA, and the structural properties were characterized by X-ray diffraction and high-resolution transmission electron microscopy. The optical properties of the nanostructured powders were also compared with those of pure ZnO powder. The ultraviolet (UV) emission was greatly enhanced compared to when pure ZnO powder was used in the nanostructured powder synthesized using the 0.5 M TAA solution, while the UV emission of that with the 0.05 M TAA solution was reduced. The green emission of the nanostructured powders was reduced compared to when the pure ZnO powder was used. The mechanism of the structural changes in the core-shell structures is proposed here and its effect on the luminescent properties is discussed.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: ZnO doping and properties · Perovskite Materials and Applications · Gas Sensing Nanomaterials and Sensors
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (21)
Show source-provided references
1. Aoki T, Hatanaka Y, Look DC (2000) ZnO diode fabricated by excimer-laser doping. Appl Phys Lett 76:3257–325810.1063/1.126599 ↗
2. Chen ZG, Cheng LN, Xu HY, Liu JZ, Zou J, Sekiguchi T, Lu GQ, Cheng HM (2010) ZnS branched architectures as optoelectronic devices and field emitters. Adv Mater 22:2376–238010.1002/adma.200903643 ↗
3. Cho DY, Song J, Hwang CS (2009) Effects of oxygen addition on the local structures of cosputtered transparent conducting oxide films. J Phys Chem C 113:20463–2046610.1021/jp905980q ↗
4. Dingle R (1969) Luminescent transistors associated with divalent copper impurities and the green emission from semiconducting zinc oxide. Phys Rev Lett 23:579–58110.1103/PhysRevLett.23.579 ↗
5. Duan JX, Huang XT, Wang EK, Ai HH (2006) Synthesis of hollow ZnO microspheres by an integrated autoclave and pyrolysis process. Nanotechnology 17:1786–179010.1088/0957-4484/17/6/040 ↗
6. Fonoberov VA, Alim KA, Balandin AA, Xiu FX, Liu JL (2006) Photoluminescence investigation of the carrier recombination processes in ZnO quantum dots and nanocrystals. Phys Rev B 73:16531710.1103/PhysRevB.73.165317 ↗
7. Gao T, Li QH, Wang TH (2005) Sonochemical synthesis, optical properties, and electrical properties of core/shell-type ZnO nanorod/CdS nanoparticle composites. Chem Mater 17:887–89210.1021/cm0485456 ↗
8. Kar S, Pal BN, Chaudhuri S, Chakravorty D (2006) One-dimensional ZnO nanostructure arrays: synthesis and characterization. J Phys Chem B 110:4605–461110.1021/jp056673r ↗
9. Kuo TJ, Lin CN, Kuo CL, Huang MH (2007) Growth of ultralong ZnO nanowires on silicon substrates by vapor transport and their use as recyclable photocatalysts. Chem Mater 19:5143–514710.1021/cm071568a ↗
10. Li JH, Zhao DX, Meng XQ, Zhang ZZ, Zhang JY, Shen DZ, Lu YM, Fan XW (2006) Enhanced ultraviolet emission from ZnS-coated ZnO nanowires fabricated by self-assembling method. J Phys Chem B 110:14685–1468710.1021/jp061563l ↗
11. Li F, Liu XQ, Kong T, Li Z, Huang XT (2009) Conversion from ZnO nanospindles into ZnO/ZnS core/shell composites and ZnS microspindles. Cryst Res Technol 44:402–40810.1002/crat.200800574 ↗
12. Liang JB, Liu JW, Xie Q, Bai S, Yu WC, Qian YT (2005) Hydrothermal growth and optical properties of doughnut-shaped ZnO microparticles. J Phys Chem B 109:9463–946710.1021/jp050485j ↗
13. Lin BX, Fu ZX, Jia YB (2001) Green luminescent center in undoped zinc oxide films deposited on silicon substrates. Appl Phys Lett 79:943–94510.1063/1.1394173 ↗
14. Ng HT, Han J, Yamada T, Nguyen P, Chen YP, Meyyappan M (2004) Single crystal nanowire vertical surround-gate field-effect transistor. Nano Lett 4:1247–125210.1021/nl049461z ↗
15. Panda SK, Dev A, Chaudhuri S (2007) Fabrication and luminescent properties of c-axis oriented ZnO-ZnS core-shell and ZnS nanorod arrays by sulfidation of aligned ZnO nanorod arrays. J Phys Chem C 111:5039–504310.1021/jp068391c ↗
16. Vanheusden K, Seager CH, Warren WL, Tallant DR, Voigt JA (1996) Correlation between photoluminescence and oxygen vacancies in ZnO phosphors. Appl Phys Lett 68:403–40510.1063/1.116699 ↗
17. Wang K, Chen JJ, Zeng ZM, Tarr J, Zhou WL, Yan YF, Jiang CS, Pern J, Mascarenhas A (2010) Synthesis and photovoltaic effect of vertically aligned ZnO/ZnS core/shell nanowire arrays. Appl Phys Lett 96:12310510.1063/1.3367706 ↗
18. Yao BD, Chan YF, Wang N (2002) Formation of ZnO nanostructures by a simple way of thermal evaporation. Appl Phys Lett 81:757–75910.1063/1.1495878 ↗
19. Yi R, Qiu GZ, Liu XH (2009) Rational synthetic strategy: From ZnO nanorods to ZnS nanotubes. J Solid State Chem 182:2791–279510.1016/j.jssc.2009.07.038 ↗
20. Zhong J, Chen H, Saraf G, Lu Y, Choi CK, Song JJ, Mackie DM, Shen H (2007) Integrated ZnO nanotips on GaN light emitting diodes for enhanced emission efficiency. Appl Phys Lett 90:20351510.1063/1.2741052 ↗
21. Zhu YF, Fan AH, Shen WZ (2008) A general chemical conversion route to synthesize various ZnO-based core/shell structures. J Phys Chem C 112:10402–1040610.1021/jp802545e ↗