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Crystallographic characterisation of ultra-thin, or amorphous transparent conducting oxides:the case for raman spectroscopy.

Caffrey, David orcid logoORCID: 0000-0001-7870-4428, Zhussupbekova, Ainur orcid logoORCID: 0000-0003-2724-8762, Vijayaraghavan, Rajani K. orcid logoORCID: 0000-0003-1096-448X, Ainabayev, Ardak, Kaisha, Aitkazy orcid logoORCID: 0000-0001-7203-9842, Sugurbekova, Gulnar orcid logoORCID: 0000-0002-6894-7247, Shvets, Igor V. orcid logoORCID: 0000-0001-7451-5435 and Fleischer, Karsten orcid logoORCID: 0000-0002-7638-4480 (2020) Crystallographic characterisation of ultra-thin, or amorphous transparent conducting oxides:the case for raman spectroscopy. Materials, 13 (2). pp. 1-14. ISSN 1996-1944

The electronic and optical properties of transparent conducting oxides (TCOs) are closely linked to their crystallographic structure on a macroscopic (grain sizes) and microscopic (bond structure) level. With the increasing drive towards using reduced film thicknesses in devices and growing interest in amorphous TCOs such as n-type InGaZnO 4 (IGZO), ZnSnO 3 (ZTO), p-type Cu x CrO 2 , or ZnRh 2 O 4 , the task of gaining in-depth knowledge on their crystal structure by conventional X-ray diffraction-based measurements are becoming increasingly difficult. We demonstrate the use of a focal shift based background subtraction technique for Raman spectroscopy specifically developed for the case of transparent thin films on amorphous substrates. Using this technique we demonstrate, for a variety of TCOs CuO, a-ZTO, ZnO:Al), how changes in local vibrational modes reflect changes in the composition of the TCO and consequently their electronic properties.
Item Type:Article (Published)
Uncontrolled Keywords:transparent conducting oxide; TCO; Raman spectroscopy; amorphous oxide; oxide electronics; background subtraction
Subjects:Physical Sciences > Chemistry
DCU Faculties and Centres:DCU Faculties and Schools > Faculty of Science and Health > School of Physical Sciences
Official URL:http://dx.doi.org/10.3390/ma13020267
Copyright Information:© 2020 The Authors. Open Access.
Funders:Science Foundation Ireland under grant number 12/IA/1264, and SFI/12/RC/2278, Ministry of Education and Science of the Republic of Kazakhstan under grant number AP05134861 and 0115PK03029, Kazakhstan government under the Bolashak program, Nazarbayev University under the Talap program
ID Code:24578
Deposited On:09 Jun 2020 16:02 by Vidatum Academic . Last Modified 29 Oct 2021 11:22

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