Charge Transport in Porous Silicon/Graphene-Based Nanostructures

被引：12
|
作者：
Olenych, I. B. [1 ]
Monastyrskii, L. S. [1 ]
Aksimentyeva, O. I. [1 ]
Orovcik, L. [2 ]
Salamakha, M. Y. [1 ]
机构：
[1] Ivan Franko Lviv Natl Univ, 50 Dragomanov Str, UA-79005 Lvov, Ukraine
[2] Slovak Acad Sci, Inst Mat & Machine Mech, Dubravska Cesta 9, Bratislava 84513, Slovakia
来源：
MOLECULAR CRYSTALS AND LIQUID CRYSTALS | 2018年 / 673卷 / 01期
关键词：
porous silicon; graphene; graphene oxide; conductivity; thermally stimulated depolarization; humidity sensor; SILICON; GRAPHENE; PHOTOLUMINESCENCE;
D O I：
10.1080/15421406.2019.1578491
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
In this study hybrid structures were created by deposition of the graphene oxide and the reduced graphene oxide on the porous silicon layer. The charge transport and relaxation processes in obtained structures were analyzed on the basis of comprehensive studies of conductivity and depolarization current in the 90-325 K temperature range within the model of disordered semiconductors. Hopping conductivity and activation mechanism of charge transport in different temperature ranges were established and the activation energy of the conductivity was determined. Localized electron states that affect the charge transport in the porous silicon/graphene-based structures were found by means of thermally stimulated depolarization spectroscopy. It has been revealed that the adsorption of water molecules changes resistive and capacitive parameters of hybrid structures. Found features of the charge transport processes expand the prospects of application of such nanomaterials for sensor electronics.
引用
收藏
页码：32 / 38
页数：7
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