Zinc Oxide Based Nano Materials and Devices最新文献

Pyrolysis of Carbon-Doped ZnO Nanoparticles for Solar Cell Application 碳掺杂ZnO纳米颗粒在太阳能电池中的热解应用

Zinc Oxide Based Nano Materials and Devices Pub Date : 2019-10-09 DOI: 10.5772/intechopen.82098

Luyolo Ntozakhe, Raymond Tichaona Taziwa

{"title":"Pyrolysis of Carbon-Doped ZnO Nanoparticles for Solar Cell Application","authors":"Luyolo Ntozakhe, Raymond Tichaona Taziwa","doi":"10.5772/intechopen.82098","DOIUrl":"https://doi.org/10.5772/intechopen.82098","url":null,"abstract":"It is very important to find new methods for improving the properties of nanostructured materials that can be used to replace the highly expensive and compli-cated techniques of fabricating ZnO nano-powders for solar cell applications. Pneumatic spray pyrolysis method offers a relatively inexpensive way of fabricating ZnO nanomaterials of controllable morphology, good crystallinity and uniform size distribution, which makes it a good candidate for the production of ZnO nanoparticles. Additionally, it has the advantage of producing ZnO NPs in one step directly on the substrate without the need for other wet chemistry processes like purification, drying and calcination. To that end, the present study emphasizes more on the design and optimization of spray pyrolysis system as well as on the pneumatic spray pyrolysis conditions for the production of carbon-doped ZnO nanoparticles. The un-doped and carbon-doped ZnO NPs were prepared using pneumatic spray pyrolysis employing zinc acetate as a precursor solution and tetrabutylammonium as a dopant. The fabricated un-doped and C-ZnO NPs were characterized for their morphological, structural and optical properties using SEMEDX, XRD and DRS. SEM analysis has revealed that the fabricated un-doped and C-ZnO NPs have spherical shape with mesoporous morphology. The cross-sectional SEM has also revealed that the film thickness changes with increasing dopant concentration from 0.31 to 0.41 μ m at higher concentrations. Moreover, the EDX spectra have confirmed the presence of Zn and O atoms in the PSP-synthesized ZnO NPs. XRD analysis of both un-doped and C-ZnO has revealed the peaks belonging to hexagonal Wurtzite structure of ZnO. Additionally, the DRS has revealed a decrease in energy band gap of the synthesized ZnO NPs, with the increase in carbon dopant level.","PeriodicalId":24015,"journal":{"name":"Zinc Oxide Based Nano Materials and Devices","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89364669","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Doped Zinc Oxide Nanostructures for Photovoltaic Solar Cells Application 掺杂氧化锌纳米结构在光伏太阳能电池中的应用

Zinc Oxide Based Nano Materials and Devices Pub Date : 2019-09-05 DOI: 10.5772/intechopen.86254

Tyona Md

{"title":"Doped Zinc Oxide Nanostructures for Photovoltaic Solar Cells Application","authors":"Tyona Md","doi":"10.5772/intechopen.86254","DOIUrl":"https://doi.org/10.5772/intechopen.86254","url":null,"abstract":"Zinc oxide and doping effects of Cu on its structural, morphological, optical, and surface wettability properties and the consequent influence on photoelectrochemical solar cell performance has been reviewed. Cu dopant in the doping solution is varied in the range of 1 to 5 at.% which significantly affected the properties of ZnO. Slight changes in the lattice parameters of the Cu-doped zinc oxide (CZO) electrodes were reported, due to the successful substitution of Zn 2+ by Cu 2+ and also enhancement in crystallinity of the films at 3 at.% Cu due to reduction in crystallographic defects in the film. Surface morphologies were reported with densely grown nanorods over the varied range of Cu, with 3 at.% having the densest microstructures with average diameter approximately 125 nm. A review of optical properties indicated significant enhancement in absorption edge of approximately 60 nm into the visible band for the nanorods with 3 at.% Cu content due to light scattering. Optical energy band-gaps decrease from 3.03 to 2.70 eV with Cu doping. Surface wettability was adjudged hydrophilic for all the films, implying high porosity and water contact angles depended on Cu content. Photoelectrochemical cell performance indicated an n-type photoactivity in sodium sulfate (Na 2 SO 4 ) electrolyte, which motivates to check its feasibility in solar cell applications.","PeriodicalId":24015,"journal":{"name":"Zinc Oxide Based Nano Materials and Devices","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74270610","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 9

Anodic ZnO-Graphene Composite Materials in Lithium Batteries 锂电池中的阳极zno -石墨烯复合材料

Zinc Oxide Based Nano Materials and Devices Pub Date : 2019-06-10 DOI: 10.5772/INTECHOPEN.86169

Herrera-Pérez Gabriel, Pérez-Zúñiga Germán, Verde-Gómez Ysmael, Valenzuela-Muñiz Ana María, Vargas-Bernal Rafael

引用次数: 1

Structural and Luminescence Properties of ZnO Nanoparticles Synthesized by Mixture of Fuel Approach in Solution Combustion Method 溶液燃烧法混合燃料法制备ZnO纳米颗粒的结构与发光性能

Zinc Oxide Based Nano Materials and Devices Pub Date : 2019-04-30 DOI: 10.5772/INTECHOPEN.82467

T. K. Pathak, H. Swart

引用次数: 1

Green Synthesis of Zinc Oxide Nanostructures 氧化锌纳米结构的绿色合成

Zinc Oxide Based Nano Materials and Devices Pub Date : 2019-02-07 DOI: 10.5772/INTECHOPEN.83338

T. Isık, Mohamed Elhousseini Hilal, N. Horzum

引用次数: 14

Surface-Enhanced Raman Spectroscopy (SERS) Based on ZnO Nanorods for Biological Applications 基于ZnO纳米棒的表面增强拉曼光谱(SERS)在生物领域的应用

Zinc Oxide Based Nano Materials and Devices Pub Date : 2019-02-04 DOI: 10.5772/INTECHOPEN.84265

Sanghwa Lee, Jun Ki Kim

{"title":"Surface-Enhanced Raman Spectroscopy (SERS) Based on ZnO Nanorods for Biological Applications","authors":"Sanghwa Lee, Jun Ki Kim","doi":"10.5772/INTECHOPEN.84265","DOIUrl":"https://doi.org/10.5772/INTECHOPEN.84265","url":null,"abstract":"Detection of nanometer-sized biomarkers is a research topic that attracts much attention as an application for early diagnosis of diseases. Biopsy monitoring by analyzing cell secretion in a non-destructive way has many advantages in the field of biomedicine. We introduce the Raman signal enhancement method on a bio-sensing chip based on surface-enhanced Raman diagnosis. This approach has the advantage because the ZnO nanorods are grown to form nanoscale porosity and are coated with gold to enable size selective biomarker detection. After sputtering gold on the grown ZnO nanostructures, the unique feature of clustering the nanorod’s heads first appeared. The grain formation on the head was the main factor for the localized surface plasmon resonance (LSPR) enhancement, and this fact could be verified by finite element analysis. It has been demonstrated in breast cancer cell line that the cell viability is also high in such gold-clad ZnO nanostructure-based surface-enhanced substrates. For bioapplication, interstitial cystitis/bladder pain syndrome (IC/BPS) animal model was prepared by injecting HCl into the bladder of a rat, and urine was collected a week later to conduct Raman spectroscopy experiments.","PeriodicalId":24015,"journal":{"name":"Zinc Oxide Based Nano Materials and Devices","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87575984","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7