Electrical Conduction Mechanism of Mg-Doped ZrO2 Thin Films

被引:1
|
作者
Mardare, Diana [1 ]
Frenti, Mariana [1 ]
Mita, Carmen [2 ]
Cornei, Nicoleta [2 ]
Bulai, Georgiana [3 ]
Dobromir, Marius [4 ]
Doroshkevich, Alexandr [5 ]
Yildiz, Abdullah [6 ]
机构
[1] Alexandru Ioan Cuza Univ, Fac Phys, 11 Carol I Blvd, Iasi 700506, Romania
[2] Alexandru Ioan Cuza Univ, Fac Chem, 11 Carol I Blvd, Iasi 700506, Romania
[3] Alexandru Ioan Cuza Univ, Integrated Ctr Environm Sci Studies North East Dev, 11 Carol I Blvd, Iasi 700506, Romania
[4] Alexandru Ioan Cuza Univ, Inst Interdisciplinary Res, Res Ctr Adv Mat & Technol, Dept Exact & Nat Sci, Iasi 700506, Romania
[5] Joint Inst Nucl Res, Str Joliot Curie 6, Dubna 141980, Russia
[6] Ankara Yildirim Beyazit Univ, Fac Engn & Nat Sci, Dept Energy Syst Engn, TR-06010 Ankara, Turkiye
关键词
Mg doped ZrO2; thin films; XPS; electrical conductivity; Meyer-Neldel rule; MEYER-NELDEL RULE; PHOTOLUMINESCENCE EMISSION; SURFACE-CHEMISTRY; ZIRCONIA; POLARONS; XPS;
D O I
10.3390/ma17153652
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Amorphous ZrO2 thin films with increasing Mg content were deposited on quartz substrates, by dip coating method. The films are transparent in the visible domain and absorbent in UV, with an optical band gap that decreases with the increase of Mg content, from 5.42 eV to 4.12 eV. The temperature dependent conductivity measurements showed typical semiconductor comportment. The decrease of the electrical conductivity by Mg doping was related to the increase of the OH groups (37% to 63%) as seen from X-ray Photoelectron Spectroscopy. It was found out that the electrical conductivity obeys the Meyer-Neldel rule. This rule, previously reported for different disordered material systems is obtained for ZrO2 for the first time in the literature. Exploring novel aspects of Mg-doped ZrO2, the present study underscores the origin of the Meyer-Neldel rule explained by the small-polaron hopping model in the non-adiabatic hopping regime. Determination of the presence of such a conduction mechanism in the samples hold promise for comprehending the important aspects, which might be a concern in developing various devices based on Mg-doped ZrO2.
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页数:12
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