Dr. Fahmi F. Mohammadsharif at the Department of Physics, Faculty of Science and Health, Koya University Published a new resaerch articlle entitled "A new insight into the temperature induced molecular aggregations in tris(8-hydroxyquinoline) metals." The research article has been published in the Journal of Materials Research and Technology which indexed by Clarivate Analytics with IF=3.327 and SCOPUS with Level Q1. The article authors are: Fahmi F. Muhammadsharif, Suhairul Hashim, Khaulah Sulaiman, G. Baldacchini.
The results achived by this reseach article opened a new route of fabricating highly emissive thin films of amorphous nanostructure, which are specifically important for organic light emitting diode (OLED) based displays.
About the Journal:
- Title: Journal of Materials Research and Technology
- Publisher: Elsevier Editora Ltda
- Coverage: Clarivate Analytics with IF=3.327 | SCOPUS with level Q1
- Journal URL: https://www.sciencedirect.com/science/article/pii/S223878541932246X
About the research article:
- Title: A new insight into the temperature induced molecular aggregations in tris(8-hydroxyquinoline) metals
- Received 25 December 2019
- Accepted 22 February 2020
- Available online 6 March 2020
- doi: https://doi.org/10.1016/j.jmrt.2020.02.084
Abstract:
Annealing of tris(8-hydroxyquinoline) gallium (Gaq3) film at various temperatures in dry N2 atmosphere has shown the existences of four different phases of molecular aggregations before the burning out of the film at about 310 °C. The first three phases, up to 235 °C, are amorphous molecular aggregations, while the fourth one at 255 °C is a crystalline structure, very likely α-polymorph. The photoluminescence (PL) intensity was increased to about five times greater than that of the pristine film at 235 °C, while the PL peak was blue shifted consistently. Although a small contribution of Rayleigh scattering cannot be excluded at high temperatures when crystallites appear, the PL blueshift was mainly attributed to the nanostructured molecular aggregations followed by enhanced PL intensity. These new findings can be a common characteristic of organometallic complexes at varied annealing temperatures. The presented results open a new route of fabricating highly emissive thin films of amorphous nanostructure, which are specifically important for organic light emitting diode (OLED) based displays.
About the authors:
Fahmi F. Muhammadsharif: Department of Physics, Faculty of Science and Health, Koya University, 44023 Koya, Kurdistan Region-F.R., Iraq.
ORCID: https://orcid.org/0000-0002-4563-9671
Suhairul Hashim: (1) Department of Physics, Faculty of Science, Universiti Teknologi Malaysia (UTM), 81310 Skudai, Johor, Malaysia; (2) Centre for Sustainable Nanomaterials (CSNano), Ibnu Sina Institute for Scientific and Industrial Research (ISI-SIR), Universiti Teknologi Malaysia (UTM), 81310 Skudai, Johor, Malaysia.
ORCID: https://orcid.org/0000-0001-8758-4288
Khaulah Sulaiman: Low Dimensional Materials Research Centre, Department of Physics, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia.
ORCID: https://orcid.org/0000-0003-3473-0493
G. Baldacchini: Via Guglielmo Quattrucci 246, Grottaferrata, 00046 Rome, Italy, formerly ENEA, Frascati Research Center, 00044 Frascati, Rome, Italy
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Koya University (KOU) is located in the city of Koya (Koy Sanjaq) which is 1.0 hr drive to the East of the Kurdistan Region capital Erbil (Arbil, Hewlér) in Kurdistan Region of F.R. Iraq. It is on the foothills of beautiful high mountain. Its campus has been carefully laid out to embrace the beautiful mountainous nature. . There are 4 Faculties and 2 Schools in KOU; Faculty of Engineering (FENG), Faculty of Science and Health (FSCH), Faculty of Education (FEDU), Faculty of Humanities and Social Silences (FHSS), Shcool of Physical Education (SPHE) and School of Medicine (SMED). Also, there are two research centers; Genome Center and Malai Gawra Center. Moreover, at KOU there is an English Language Center (BELC) at KOU has been opened with the sponsorship of IREX and American embassy in Baghdad as well as with the support of Spring International Language Center of The University of Arkansas. KOU has two Scientific Journals; ARO-The Scientific Journal of Koya University, which is indexed by Clarivate Analytics (ESCI), and Koya University Journal of Humanities and Social Sciences (KUJHSS). KOU is a proactive member of Erasmus/ Marhaba Project and Erasmus+. KOU signed many Memorandum of Understandings (MoU) with many International Universities, e.g., The University of Arkansas (June 2015). The Lulea University in Sweden (April 2014), The University of Nottingham in the UK, The University of Buckingham in the UK (Oct 2008), Belkin University in Turkey (Sep 2009) and The University of Greenwich in the UK.
