New functionalities for electronics and optoelectronics driven by new physics of two-dimenntional semiconductors materials
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KANTSER, Valeriu, EVTODIEV, Igor, UNTILA, Dumitru. New functionalities for electronics and optoelectronics driven by new physics of two-dimenntional semiconductors materials. In: Balkan Workshop on Applied Physics, 7-9 iulie 2016, Constanța. Constanța, România : Ovidius University of Constanta, 2016, Ediția a 16-a, pp. 24-25.
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Balkan Workshop on Applied Physics
Ediția a 16-a, 2016
Seminarul "Balkan Workshop on Applied Physics"
Constanța, Romania, 7-9 iulie 2016

New functionalities for electronics and optoelectronics driven by new physics of two-dimenntional semiconductors materials

CZU: 538.9+621.382

Pag. 24-25

Kantser Valeriu, Evtodiev Igor, Untila Dumitru
 
Institute of the Electronic Engineering and Nanotechnologies "D. Ghitu" of the Academy of Sciences of Moldova
 
Disponibil în IBN: 6 august 2020



Teza

The past year - 2015 - was the tenth anniversary of modern graphene and at present quasi twodimensional
semiconductor materials (2DSCM) are currently the focus of many studies thanks to their novel
and superior physical properties that may shape the future electronic and photonic devices [1,2]. The field of
research in 2DSCM has been enjoying spectacular growth during the past decade and many novel materials
that had been initially considered to exist only in the realm of theory have been synthesized. These include
layered metal chalcogenides, groups IV, III-VI and II-VI semiconductor analogues of graphene and others.
For example, it has been shown [2,3] that almost every II-VI, III-VI and III-V semiconductors that typically
crystallizes into the three-dimensional sphalerite , wurtzite or hexagonal lattices, such as ZnS, GaSe, can be
converted into atomically thin 2D crystalline frameworks. The unique features of 2DSCM , such as their
reduced dimensionality, symmetry and appearance of topological insulator states, lead to the appearance of
phenomena that are very different from those of their bulk material counterparts. The two dimensional nature
of these materials also plays an entirely mechanical role as they are inherently flexible, strong, and extremely
thin. This article reviews the recent progress made in 2DSCM and its nanostructures investigation. The state
of art of different new scenario of engineering 2DSCM are revealed, in particular by intercalation. Some of
new proposals for innovative electronic and optoelectronic devices are discussed.
The first part of the paper deal with some general consideration in the synthesis and characterization
of 2DSCM, its classification and analysis of the main peculiarities. Similar to the graphene, 2DSCM are its
two-dimensional and isostructural counterparts based on the typical layer-structured semiconductors, whose
layers are bound by weak van der Waals forces.
The second part of the paper includes recent results [3,4] related to 2DSCM and nanostructures based
on layered III-VI semiconductors. 2DSCM nanocomposites in the form of Ga, In, Cd and Zn chalcogenide
nanolamellars with sizes of 10 30 nm are obtained by heat treatment III-VI semiconductors single crystalline
plates in Zn and Cd vapor. Optical and photoelectrical properties of III-VI 2DSCM reveal a lot of peculiarities
related to the transformation of electronic structure in the nanocomposites.
To ilustrate the potential of 2D materials for electronics in the last part of the paper we present the the
recently results dealing with the performance of metal chalcogenides as well as of II-VI, III-VI and III-V
semiconductors transistors, photodetectors, photovoltaic cells, and LEDs.
Withers F., Del Pozo-Zamudio O. , Novoselov K. Nature Materials, 14, 301, (2015)
Geim A. K. and Grigorieva I. V., Nature 499, 419 (2013)
Evtodiev I, Caraman Iu. , Kantser V. , Untila D. et al in the Book Nanostructures and Thin Films for
Multifunctional Applications Springer Book 148- 262, (2016).
Untila D, Kantser V, Caraman M, Evtodiev I,et.al. Phys. Status Solidi C 12, 65, (2015)