Persistent Photoconductivity in Strained Epitaxial BiFeO3 Thin Films

被引：64

作者：

Bhatnagar, Akash ^{[1
]}

Kim, Young Heon ^{[2
]}

Hesse, Dietrich ^{[1
]}

Alexe, Marin ^{[1
,3
]}

机构：

[1] Max Planck Inst Microstruct Phys, D-06120 Halle, Germany

[2] Korea Res Inst Stand & Sci, Taejon 305340, South Korea

[3] Univ Warwick, Coventry CV4 7AL, W Midlands, England

来源：

NANO LETTERS | 2014年 / 14卷 / 09期

关键词：

BiFeO3; strain; enhanced conductivity; persistent photoconductivity; thermally stimulated current; CADMIUM-SULFIDE CRYSTALS; IMPERFECTIONS; POLARIZATION; MECHANISM;

D O I：

10.1021/nl502183j

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A drastic change in the conductivity of strained BiFeO3 (BFO) films is observed after illuminating them with above-band gap light. This has been termed as persistent photoconductivity. The enhanced conductivity decays exponentially with time. A trapping character of the sub-band levels and their subsequent gradual emptying is proposed as a possible mechanism.

引用

页码：5224 / 5228

页数：5

共 25 条

[1] Local Mapping of Generation and Recombination Lifetime in BiFeO3 Single Crystals by Scanning Probe Photoinduced Transient Spectroscopy [J].

Alexe, Marin .

NANO LETTERS, 2012, 12 (05) :2193-2198

[2] Evidence for Room-Temperature Multiferroicity in a Compound with a Giant Axial Ratio [J].

Bea, H. ;

Dupe, B. ;

Fusil, S. ;

Mattana, R. ;

Jacquet, E. ;

Warot-Fonrose, B. ;

Wilhelm, F. ;

Rogalev, A. ;

Petit, S. ;

Cros, V. ;

Anane, A. ;

Petroff, F. ;

Bouzehouane, K. ;

Geneste, G. ;

Dkhil, B. ;

Lisenkov, S. ;

Ponomareva, I. ;

Bellaiche, L. ;

Bibes, M. ;

Barthelemy, A. .

PHYSICAL REVIEW LETTERS, 2009, 102 (21)

[3]

Braunlich P.F., 1979, THERMALLY STIMULATED

[4]

Bube R.H., 1960, Photoconductivity of Solids

[5]

Bube R.H., 1992, Photoelectronic Properties of Semiconductors

[6] PHOTOCONDUCTIVITY AND CRYSTAL IMPERFECTIONS IN CADMIUM SULFIDE CRYSTALS .1. EFFECT OF IMPURITIES [J].

BUBE, RH ;

THOMSEN, SM .

JOURNAL OF CHEMICAL PHYSICS, 1955, 23 (01) :15-17

[7] PHOTOCONDUCTIVITY AND CRYSTAL IMPERFECTIONS IN CADMIUM SULFIDE CRYSTALS .2. DETERMINATION OF CHARACTERISTIC PHOTOCONDUCTIVITY QUANTITIES [J].

BUBE, RH .

JOURNAL OF CHEMICAL PHYSICS, 1955, 23 (01) :18-25

[8] Low-Symmetry Monoclinic Phases and Polarization Rotation Path Mediated by Epitaxial Strain in Multiferroic BiFeO3 Thin Films [J].

Chen, Zuhuang ;

Luo, Zhenlin ;

Huang, Chuanwei ;

Qi, Yajun ;

Yang, Ping ;

You, Lu ;

Hu, Chuansheng ;

Wu, Tom ;

Wang, Junling ;

Gao, Chen ;

Sritharan, Thirumany ;

Chen, Lang .

ADVANCED FUNCTIONAL MATERIALS, 2011, 21 (01) :133-138

[9] Nanoscale Structure and Mechanism for Enhanced Electromechanical Response of Highly Strained BiFeO3 Thin Films [J].

Damodaran, Anoop R. ;

Liang, Chen-Wei ;

He, Qing ;

Peng, Chun-Yen ;

Chang, Li ;

Chu, Ying-Hao ;

Martin, Lane W. .

ADVANCED MATERIALS, 2011, 23 (28) :3170-+

[10] Characterization of electronic structure and defect states of thin epitaxial BiFeO3 films by UV-visible absorption and cathodoluminescence spectroscopies [J].

Hauser, A. J. ;

Zhang, J. ;

Mier, L. ;

Ricciardo, R. A. ;

Woodward, P. M. ;

Gustafson, T. L. ;

Brillson, L. J. ;

Yang, F. Y. .

APPLIED PHYSICS LETTERS, 2008, 92 (22)

← 1 2 3 →