Optical properties of CdSe and CdO thin films electrochemically prepared

被引：75

作者：

Henriquez, R. ^{[2
]}

Grez, P. ^{[2
]}

Munoz, E. ^{[2
]}

Gomez, H. ^{[2
]}

Badan, J. A. ^{[1
]}

Marotti, R. E. ^{[1
]}

Dalchiele, E. A. ^{[1
]}

机构：

[1] Univ Republica, Fac Ingn, Inst Fis, Montevideo, Uruguay

[2] Pontificia Univ Catolica Valparaiso, Fac Ciencias, Inst Quim, Valparaiso, Chile

来源：

THIN SOLID FILMS | 2010年 / 518卷 / 07期

关键词：

Optical transmittance; Electrodeposition; Absorption coefficient; Bandgap; ZNO; ELECTRODEPOSITION; DEPENDENCE; EDGE;

D O I：

10.1016/j.tsf.2009.09.030

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The present work comparatively studies the optical properties of CdO against CdSe samples potentiostatically electrode posited onto fluorine-doped tin oxide/glasses (FTO). The films were prepared by electrochemical reduction processes in dimethyl sulfoxide (DMSO) solution. The optical properties are studied by transmittance measurements and diffuse reflectance spectra (DRS). Structural properties of the films were also studied by X-ray diffraction spectroscopy (XRD). For CdSe the direct bandgap energy obtained from both transmittance measurements and first derivative peak position of the DRS is 1.69 +/- 0.01 eV. In the case of CdO both direct and indirect gaps were found. Careful deconvolution of the spectra allows assigning the direct bandgap energy at 2.52 eV. A first indirect bandgap appears at 2.03 eV, while it is possible to have a second one at 0.46 eV. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：1774 / 1778

页数：5

共 36 条

[1] Single-crystalline rocksalt CdO layers grown on GaAs(001) substrates by metalorganic molecular-beam epitaxy [J].

Ashrafi, ABMA ;

Kumano, H ;

Suemune, I ;

Ok, YW ;

Seong, TY .

APPLIED PHYSICS LETTERS, 2001, 79 (04) :470-472

[2] Materials challenges for CdTe and CuInSe2 photovoltaics [J].

Beach, Joseph D. ;

McCandless, Brian E. .

MRS BULLETIN, 2007, 32 (03) :225-229

[3]

Bhargava R., 1997, EMIS DATAREVIEWS SER, V17

[4] Synthesis and optical characterization of ZnO and ZnO:Al nanocrystalline films obtained by the sol-gel dip-coating process [J].

Bojorge, C. D. ;

Canepa, H. R. ;

Gilabert, U. E. ;

Silva, D. ;

Dalchiele, E. A. ;

Marotti, R. E. .

JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS, 2007, 18 (11) :1119-1125

[5] High transmittance CdO thin films obtained by the sol-gel method [J].

Carballeda-Galicia, DM ;

Castanedo-Pérez, R ;

Jiménez-Sandoval, O ;

Jiménez-Sandoval, S ;

Torres-Delgado, G ;

Zúñiga-Romero, CI .

THIN SOLID FILMS, 2000, 371 (1-2) :105-108

[6] Optical characterization of thermally evaporated thin CdO films [J].

Dakhel, AA ;

Henari, FZ .

CRYSTAL RESEARCH AND TECHNOLOGY, 2003, 38 (11) :979-985

[7] Band-gap shrinkage in n-type-doped CdO probed by photoemission spectroscopy [J].

Dou, Y ;

Fishlock, T ;

Egdell, RG ;

Law, DSL ;

Beamson, G .

PHYSICAL REVIEW B, 1997, 55 (20) :13381-13384

[8] STRUCTURAL, OPTICAL, AND ELECTRICAL-PROPERTIES OF CADMIUM-OXIDE FILMS DEPOSITED BY SPRAY-PYROLYSIS [J].

GURUMURUGAN, K ;

MANGALARAJ, D ;

NARAYANDASS, SK ;

BALASUBRAMANIAN, C .

PHYSICA STATUS SOLIDI A-APPLIED RESEARCH, 1994, 143 (01) :85-91

[9] BAND-GAP WIDENING IN HEAVILY SN-DOPED IN2O3 [J].

HAMBERG, I ;

GRANQVIST, CG ;

BERGGREN, KF ;

SERNELIUS, BE ;

ENGSTROM, L .

PHYSICAL REVIEW B, 1984, 30 (06) :3240-3249

[10] Surface textured MF-sputtered ZnO films for microcrystalline silicon-based thin-film solar cells [J].

Huepkes, J. ;

Rech, B. ;

Kluth, O. ;

Repmann, T. ;

Zwaygardt, B. ;

Mueller, J. ;

Drese, R. ;

Wuttig, M. .

SOLAR ENERGY MATERIALS AND SOLAR CELLS, 2006, 90 (18-19) :3054-3060

← 1 2 3 4 →