Energy transfer in the photoexcitation of Sm3+-implanted TiO2 thin films

被引：43

作者：

Lange, S ^{[1
]}

Sildos, I ^{[1
]}

Kiisk, V ^{[1
]}

Aarik, J ^{[1
]}

机构：

[1] Univ Tartu, Inst Phys, EE-51014 Tartu, Estonia

来源：

MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY | 2004年 / 112卷 / 01期

关键词：

titanium dioxide; rare-earths; photoluminescence;

D O I：

10.1016/j.mseb.2004.06.007

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

High-quality nanocrystalline TiO2 thin films of anatase phase were prepared by using the atomic layer deposition technique and implanted with Sm3+ ions. After the annealing of the films a band-to-band optical excitation of TiO2 at low temperatures led to a broadband excitonic emission superposed by a Sm3+-specific emission series of a well-pronounced fine structure. At higher temperatures (>250 K) only the Sm3+ emission dominates. The fine structure of Sm3+ ions indicates that the Sm3+ ions occupy regular sites in the host material. The direct and indirect (retarded) channels of formation of the excitonic states were concluded from the decay kinetics of the emission spectra of Sm3+-doped TiO2. The energy transfer from the host matrix to. the Sm3+ ions is demonstrated and the participation of bound excitonic states in the energy transfer process discussed. (C) 2004 Elsevier B.V. All rights reserved.

引用

收藏

页码：87 / 90

页数：4

相关论文

共 33 条

[1] Atomic layer growth of epitaxial TiO2 thin films from TiCl4 and H2O on α-Al2O3 substrates [J].

Aarik, J ;

Aidla, A ;

Mändar, H ;

Uustare, T ;

Schuisky, M ;

Hårsta, A .

JOURNAL OF CRYSTAL GROWTH, 2002, 242 (1-2) :189-198

[2] Atomic layer deposition of titanium dioxide from TiCl4 and H2O:: investigation of growth mechanism [J].

Aarik, J ;

Aidla, A ;

Mändar, H ;

Uustare, T .

APPLIED SURFACE SCIENCE, 2001, 172 (1-2) :148-158

[3] OPTICAL-PROPERTIES OF RUTILE NEAR ITS FUNDAMENTAL-BAND GAP [J].

AMTOUT, A ;

LEONELLI, R .

PHYSICAL REVIEW B, 1995, 51 (11) :6842-6851

[4] Temperature dependent luminescence characteristics of Sm3+-doped silicate glass [J].

Annapurna, K ;

Dwivedi, RN ;

Kumar, A ;

Chaudhuri, AK ;

Buddhudu, S .

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY, 2000, 56 (01) :103-109

[5] Temperature-dependent luminescence and energy transfer in europium and rare earth codoped nanostructured xerogel and sol-gel silica glasses [J].

Buddhudu, S ;

Morita, M ;

Murakami, S ;

Rau, D .

JOURNAL OF LUMINESCENCE, 1999, 83-4 :199-203

[6] Si-based materials and devices for light emission in silicon [J].

Castagna, ME ;

Coffa, S ;

Monaco, M ;

Caristia, L ;

Messina, A ;

Mangano, R ;

Bongiorno, C .

PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES, 2003, 16 (3-4) :547-553

[7] ON THE PHOTOLUMINESCENCE OF SEMICONDUCTING TITANATES APPLIED IN PHOTOELECTROCHEMICAL CELLS [J].

DEHAART, LGJ ;

DEVRIES, AJ ;

BLASSE, G .

JOURNAL OF SOLID STATE CHEMISTRY, 1985, 59 (03) :291-300

[8]

Dieke G.H., 1968, Spectra and Energy Levels of Rare Earth ions in Crystals

[9] SAMARIUM3+-DOPED GLASS-LASER OPERATING AT 651-NM [J].

FARRIES, MC ;

MORKEL, PR ;

TOWNSEND, JE .

ELECTRONICS LETTERS, 1988, 24 (11) :709-711

[10] Visible and near-IR luminescence via energy transfer in rare earth doped mesoporous titania thin films with nanocrystalline walls [J].

Frindell, KL ;

Bartl, MH ;

Robinson, MR ;

Bazan, GC ;

Popitsch, A ;

Stucky, GD .

JOURNAL OF SOLID STATE CHEMISTRY, 2003, 172 (01) :81-88

← 1 2 3 4 →