A coordination chemistry approach for shape controlled synthesis of indium oxide nanostructures and their photoelectrochemical properties

TY - JOUR

T1 - A coordination chemistry approach for shape controlled synthesis of indium oxide nanostructures and their photoelectrochemical properties

AU - Shinde, Dipak V.

AU - Ahn, Do Young

AU - Jadhav, Vijaykumar V.

AU - Lee, Deok Yeon

AU - Shrestha, Nabeen K.

AU - Lee, Joong Kee

AU - Lee, Hwa Young

AU - Mane, Rajaram S.

AU - Han, Sung Hwan

PY - 2014/4/21

Y1 - 2014/4/21

N2 - Indium oxide (In2O3) is an important wide band-gap semiconductor having applications in a variety of optoelectronic devices. We report here on the low temperature solution deposition of In(OH)3 and In(SO4)(OH)·H2O architectures with various shapes such as cubes, maize corns and giant crystals. The In2O3 nanostructures are then obtained by solid state transformation of In(OH) 3 and In(SO4)(OH)·H2O architectures. Shape control is achieved by controlling the local concentration of In 3+ ions available for reaction by applying the principles of coordination chemistry, thereby obviating the need of any shape controlling agents. The phase and surface composition is obtained by X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) measurements. The XPS is used to probe the defect structure of In2O3 architecture. Optical properties of the films, studied by UV-Vis absorption and photoluminescence (PL) spectroscopy measurements, show that the different morphologies have different band-gaps. Furthermore current-voltage characteristics of In2O 3-CdSe photoelectrochemical cells are studied, which show that cube-CdSe samples display excellent photovoltaic behaviour, exhibiting a short circuit current density in excess of 10 mA cm-2. The charge transport properties of the In2O3-CdSe photoanodes are studied by impedance spectroscopy, which shows that cube-CdSe samples have lowest resistance to charge transfer.

AB - Indium oxide (In2O3) is an important wide band-gap semiconductor having applications in a variety of optoelectronic devices. We report here on the low temperature solution deposition of In(OH)3 and In(SO4)(OH)·H2O architectures with various shapes such as cubes, maize corns and giant crystals. The In2O3 nanostructures are then obtained by solid state transformation of In(OH) 3 and In(SO4)(OH)·H2O architectures. Shape control is achieved by controlling the local concentration of In 3+ ions available for reaction by applying the principles of coordination chemistry, thereby obviating the need of any shape controlling agents. The phase and surface composition is obtained by X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) measurements. The XPS is used to probe the defect structure of In2O3 architecture. Optical properties of the films, studied by UV-Vis absorption and photoluminescence (PL) spectroscopy measurements, show that the different morphologies have different band-gaps. Furthermore current-voltage characteristics of In2O 3-CdSe photoelectrochemical cells are studied, which show that cube-CdSe samples display excellent photovoltaic behaviour, exhibiting a short circuit current density in excess of 10 mA cm-2. The charge transport properties of the In2O3-CdSe photoanodes are studied by impedance spectroscopy, which shows that cube-CdSe samples have lowest resistance to charge transfer.

UR - http://www.scopus.com/inward/record.url?scp=84896466612&partnerID=8YFLogxK

U2 - 10.1039/c3ta15407f

DO - 10.1039/c3ta15407f

M3 - 文章

AN - SCOPUS:84896466612

SN - 2050-7488

VL - 2

SP - 5490

EP - 5498

JO - Journal of Materials Chemistry A

JF - Journal of Materials Chemistry A

IS - 15

ER -