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Scale-up synthesis of ZnO nanorods for printing inexpensive ZnO/polymer white light-emitting diode
Linköping University, Department of Science and Technology, Physics and Electronics. Linköping University, The Institute of Technology. (Fysikalisk elektronik och Nanoteknologi / Physical Electronics and nanotechnology)
Acreo AB, Printed Electronics, P.O. Box 787, 60117 Norrköping, Sweden.
Linköping University, Department of Science and Technology, Physics and Electronics. Linköping University, The Institute of Technology. (Fysikalisk elektronik och Nanoteknologi / Physical Electronics and nanotechnology)
Linköping University, Department of Science and Technology, Physics and Electronics. Linköping University, The Institute of Technology. (Fysikalisk elektronik och Nanoteknologi / Physical Electronics and nanotechnology)
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2012 (English)In: Journal of Materials Science, ISSN 0022-2461, E-ISSN 1573-4803, Vol. 47, no 11, 4726-4731 p.Article in journal (Refereed) Published
Abstract [en]

In this study, possibilities of scaling up the synthesis of zinc oxide (ZnO) nanorods (NRs) by the hydrothermal method have been explored. It was found that batches yielding several grams can easily be made using common and easily available materials. Further, a printable composition was fabricated by mixing the obtained ZnO NRs into a common solvent-based screen printable varnish. Scanning electron microscope, high-resolution transmission electron microscope, X-ray diffraction, UV–vis spectroscopy analysis of the scaled up batch indicated that the ZnO nanostructures were of NRs shape, well crystalline and having less defects. Using the ZnO NRs-based printable composition a device fabrication on a flexible substrate was demonstrated, producing a flexible light-emitting device being highly tolerant to bending.

Place, publisher, year, edition, pages
Springer, 2012. Vol. 47, no 11, 4726-4731 p.
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-76674DOI: 10.1007/s10853-012-6342-1ISI: 000302244500026OAI: oai:DiVA.org:liu-76674DiVA: diva2:515778
Available from: 2012-04-16 Created: 2012-04-16 Last updated: 2017-12-07Bibliographically approved
In thesis
1. ZnO and CuO Nanostructures: Low Temperature Growth, Characterization, their Optoelectronic and Sensing Applications
Open this publication in new window or tab >>ZnO and CuO Nanostructures: Low Temperature Growth, Characterization, their Optoelectronic and Sensing Applications
2012 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

One dimensional (1-D), zinc oxide (ZnO) and copper (II) oxide (CuO), nanostructures have great potential for applications in the fields of optoelectronic and sensor devices. Research on nanostructures is a fascinating field that has evolved during the last few years especially after the utilization of the hydrothermal growth method. Using this method variety of nanostructures can be grown from solutions, it is a cheap, easy, and environment friendly approach. These nanostructures can be synthesized on various conventional and nonconventional substrates such as silicon, plastic, fabrics and paper etc.

The primary purpose of the work presented in this thesis is to realize controllable growth of ZnO, CuO and nanohybrid ZnO/CuO nanostructures and to process and develop white light emitting diodes and sensor devices from the corresponding nanostructures.

The first part of the thesis deals with ZnO nanostructures grown under different hydrothermal conditions in order to gain a better understanding of the growth. Possible parameters affecting the growth such as the pH, the growth temperature, the growth time, and the precursors  concentration which can alter the morphology of the nanostructures were investigated (paper 1). Utilizing the advantage of the low temperature for growth we synthesized ZnO nanostructures on different substrates, specifically on flexible substrates, which are likely to be integrated with flexible organic substrates for future foldable and disposable electronics (paper 2, 3).

In the second part of the thesis, using the results and findings from the growth of ZnO nanostructures, it was possible to successfully implement ZnO nanostructures for white light emitting diodes (LEDs) on different flexible substrates (paper 4, 5).

In paper 4 we realized a ZnO/polymer LED grown on a paper substrate. In paper 5 we extended the idea to print the ZnO nanorods/polymer hybrid LEDs with potential application to large area flexible displays.

In the last part of the thesis, CuO and nanohybrid ZnO/CuO nanostructures were utilized to fabricate Ag+ detection and humidity sensors. In paper 6 we reported Ag+ selective electrochemical sensor based on the use of functionalized CuO nanopetals. To combine the advantages of both oxides nanostructures and to improve the performance we fabricated a pn-heterojuction using intrinsic n-ZnO nanorods and p-CuO nanostructures which were then utilized as an efficient humidity sensor (paper 7).

Place, publisher, year, edition, pages
Linköping: Linköping University Electronic Press, 2012. 66 p.
Series
Linköping Studies in Science and Technology. Dissertations, ISSN 0345-7524 ; 1441
Keyword
Zinc oxide, Copper (II) oxide, Nanostructures, Hydrothermal growth, Light emitting diodes.
National Category
Natural Sciences
Identifiers
urn:nbn:se:liu:diva-76677 (URN)978-91-7519-912-2 (ISBN)
Public defence
2012-05-11, K3, Kåkenhus, Campus Norrköping, Linköpings universitet, Norrköping, 10:15 (English)
Opponent
Supervisors
Available from: 2012-04-16 Created: 2012-04-16 Last updated: 2014-01-15Bibliographically approved

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Amin, GulZainelabdin, AhmedZaman, SiamaNur, OmerWillander, Magnus

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