1
|
Galeazzi R, González-Panzo IJ, Díaz-Becerril T, Morales C, Rosendo E, Silva R, Romano-Trujillo R, Coyopol A, Nieto-Caballero FG, Treviño-Yarce L. Physicochemical conditions for ZnO films deposited by microwave chemical bath deposition. RSC Adv 2018; 8:8662-8670. [PMID: 35539881 PMCID: PMC9078622 DOI: 10.1039/c8ra00065d] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2018] [Accepted: 02/16/2018] [Indexed: 12/30/2022] Open
Abstract
Physicochemical analysis was carried out to obtain the species distribution diagrams (SDDs) for the deposition of ZnO films as a function of OH− ion concentration ([OH−]) in the reaction solution. The study of SDDs predicts nucleation and ZnO film growth by means of the dominant species at a given pH value. To confirm this, a series of experiments were made varying the [OH−] in the reaction solution and keeping the others parameters constant. Structured zinc oxide (ZnO) films were obtained on glass substrates by microwave chemical bath deposition (MWCBD). Structural, optical and morphological ZnO film properties were investigated as a function of [OH−]. X-Ray diffraction technique (XRD) measurements show multiple diffraction peaks, indicating the polycrystalline nature of ZnO films. Scanning Electron Microscopy (SEM) images of ZnO structures showed morphological changes with the variation of [OH−]. The stoichiometry of the structures changed as the [OH−] was varied in solution. From Raman spectra, it was observed that the [OH−] of the reaction mixture strongly affects the crystal quality of ZnO structures. A reaction pathway for the synthesis of ZnO structures based on our results is proposed. Experimental results are consistent with the physical–chemical analysis. Physicochemical analysis was carried out to obtain the species distribution diagrams (SDDs) for the deposition of ZnO films as a function of OH− ion concentration ([OH−]) in the reaction solution.![]()
Collapse
Affiliation(s)
- R. Galeazzi
- CIDS-ICUAP
- Benemérita Universidad Autónoma de Puebla
- Puebla
- México
| | | | | | - C. Morales
- CIDS-ICUAP
- Benemérita Universidad Autónoma de Puebla
- Puebla
- México
| | - E. Rosendo
- CIDS-ICUAP
- Benemérita Universidad Autónoma de Puebla
- Puebla
- México
| | - R. Silva
- IFUAP
- Benemérita Universidad Autónoma de Puebla
- Puebla
- México
| | | | - A. Coyopol
- CIDS-ICUAP
- Benemérita Universidad Autónoma de Puebla
- Puebla
- México
| | | | | |
Collapse
|
2
|
López JAL, López JC, Valerdi DEV, Salgado GG, Díaz-Becerril T, Pedraza AP, Gracia FJF. Morphological, compositional, structural, and optical properties of Si-nc embedded in SiOx films. Nanoscale Res Lett 2012; 7:604. [PMID: 23110990 PMCID: PMC3606402 DOI: 10.1186/1556-276x-7-604] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/30/2012] [Accepted: 06/26/2012] [Indexed: 06/01/2023]
Abstract
Structural, compositional, morphological, and optical properties of silicon nanocrystal (Si-nc) embedded in a matrix of non-stoichiometric silicon oxide (SiOx) films were studied. SiOx films were prepared by hot filament chemical vapor deposition technique in the 900 to 1,400°C range. Different microscopic and spectroscopic characterization techniques were used. The film composition changes with the growth temperature as Fourier transform infrared spectroscopy, energy dispersive X-ray spectroscopy, and X-ray photoelectron spectroscopy reveal. High-resolution transmission electron microscopy supports the existence of Si-ncs with a diameter from 1 to 6.5 nm in the matrix of SiOx films. The films emit in a wide photoluminescent spectrum, and the maximum peak emission shows a blueshift as the growth temperature decreases. On the other hand, transmittance spectra showed a wavelength shift of the absorption border, indicating an increase in the energy optical bandgap, when the growth temperature decreases. A relationship between composition, Si-nc size, energy bandgap, PL, and surface morphology was obtained. According to these results, we have analyzed the dependence of PL on the composition, structure, and morphology of the Si-ncs embedded in a matrix of non-stoichiometric SiOx films.
Collapse
Affiliation(s)
- J Alberto Luna López
- IC-CIDS Benemérita Universidad Autónoma de Puebla, Ed. 103 C o D, Col. San Manuel, C.P, Puebla, Pue, 72570, Mexico
| | - J Carrillo López
- IC-CIDS Benemérita Universidad Autónoma de Puebla, Ed. 103 C o D, Col. San Manuel, C.P, Puebla, Pue, 72570, Mexico
| | - D E Vázquez Valerdi
- IC-CIDS Benemérita Universidad Autónoma de Puebla, Ed. 103 C o D, Col. San Manuel, C.P, Puebla, Pue, 72570, Mexico
| | - G García Salgado
- IC-CIDS Benemérita Universidad Autónoma de Puebla, Ed. 103 C o D, Col. San Manuel, C.P, Puebla, Pue, 72570, Mexico
| | - T Díaz-Becerril
- IC-CIDS Benemérita Universidad Autónoma de Puebla, Ed. 103 C o D, Col. San Manuel, C.P, Puebla, Pue, 72570, Mexico
| | - A Ponce Pedraza
- Department of Physics & Astronomy, University of Texas at San Antonio, San Antonio, TX, 78249, USA
| | - F J Flores Gracia
- IC-CIDS Benemérita Universidad Autónoma de Puebla, Ed. 103 C o D, Col. San Manuel, C.P, Puebla, Pue, 72570, Mexico
| |
Collapse
|