Exciton and core-level electron confinement effects in transparent ZnO thin films

被引：118

作者：

Mosquera, Adolfo A. ^{[1
]}

Horwat, David ^{[2
]}

Rashkovskiy, Alexandr ^{[4
]}

Kovalev, Anatoly ^{[4
]}

Miska, Patrice ^{[3
]}

Wainstein, Dmitry ^{[4
]}

Albella, Jose M. ^{[1
]}

Endrino, Jose L. ^{[5
]}

机构：

[1] CSIC, Inst Ciencia Mat, E-28049 Madrid, Spain

[2] Univ Lorraine, Inst Jean Lamour, UMR 7198, F-54000 Nancy, France

[3] CNRS, Inst Jean Lamour, UMR 7198, F-54000 Nancy, France

[4] Surface Phenomena Res Grp, Moscow 105005, Russia

[5] Abengoa Res SL, Seville 41014, Spain

来源：

SCIENTIFIC REPORTS | 2013年 / 3卷

关键词：

PHOTOLUMINESCENCE; ZINC; SPECTROSCOPY; MECHANISMS; OXIDATION; EMISSION; GREEN; SHIFT; GAIN;

D O I：

10.1038/srep01714

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The excitonic light emission of ZnO films have been investigated by means of photoluminescence measurements in ultraviolet-visible region. Exciton confinement effects have been observed in thin ZnO coatings with thickness below 20 nm. This is enhanced by a rise of the intensity and a blue shift of the photoluminescence peak after extraction of the adsorbed species upon annealing in air. It is found experimentally that the free exciton energy (determined by the photoluminescence peak) is inversely proportional to the square of the thickness while core-level binding energy is inversely proportional to the thickness. These findings correlate very well with the theory of kinetic and potential confinements.

引用

页数：6

共 53 条

[1] Polarity effects in the x-ray photoemission of ZnO and other wurtzite semiconductors [J].