Preparation and characterization of indium-doped tin oxide thin films

Manoj, P K; Joseph, Benny; Vaidyan, V. K.; Amma, D. Sumangala Devi

doi:10.1016/j.ceramint.2005.09.016

Cited by 111 publications

(30 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Up to 2% doping, it is good (about 72% in the visible region). But when it is more than 2% the transmittance in the visible region decreases to 40% to 50% .The decrease of transmittance at higher doping concentrations may be due to the increased scattering of photons by crystal defects created by doping, which is in accordance with the findings of other workers (Manoj et al 2007). The above deposited films were annealed at 200C for 10 minutes.…”

Section: Methodssupporting

confidence: 78%

Optical Properties of Undoped and Indium-doped Tin Oxide Thin Films

Chowdhury

Choudhury

Hasan

et al. 2011

J Bangladesh Acad Sci

View full text Add to dashboard Cite

Thin films of Tin Oxide (SnO 2 ), having thickness of 200 nm, were formed on to glass substrates by thermal evaporation of high-purity SnO 2 powder in vacuum at various substrate temperatures (T S ), ranging between 25 and 200C. SnO 2 films with varying thickness were also prepared for a fixed T S = 100C. Further, doping of SnO 2 films with Indium (In) was accomplished through solid state diffusion process by successive deposition of SnO 2 and In films and subsequent annealing at 200C for 10 minutes. Both undoped and doped films were characterized optically by UV-VIS-NIR spectrophotometry in the photon wavelength ranging from 300 to 2500 nm. In the visible photon wavelength range, the average optical transmittance (T%) of the films with varying T S was found to be 85%. The maximum value of T % was found to be 89 % around the wavelength of 700nm. The variation of absorption coefficient with photon energy in the fundamental absorption region is the steepest for T S = 100C. The sub-band gap (SBG) absorption is also minimum for this T s . A fluctuating behavior of the band gap energy (E g ) with T s is observed attaining the highest value of 3.59 eV for T s = 100C. The band gap energy increases with thickness but T% in the visible range decreases. The T% in the visible range varies inversely with indium doping, being highest for undoped films. The E g increases upto 2 wt% In doping and gradually decreases for enhanced doping. It seems reasonable to conclude that In doping does not bring favorable optical characteristics. Undoped SnO 2 films having thickness of 200 nm and formed at substrate temperature of 100C yield essential acceptable properties for photovoltaic applications.

show abstract

Section: Methodssupporting

confidence: 78%

Optical Properties of Undoped and Indium-doped Tin Oxide Thin Films

Chowdhury

Choudhury

Hasan

et al. 2011

J Bangladesh Acad Sci

View full text Add to dashboard Cite

show abstract

“…It should be noted that these clusters (threads) have a small diameter, roughly equal to the diameter of the particles (50 nm), and at low concentrations of In 2 O 3 in the composite film the number of threads is quite small. Therefore, the transition from conduction through SnO 2 particles to conduction through In 2 O 3 particles with increasing concentration of In 2 O 3 in the film, occurs gradually in the region from 20 to 50%, where there are parallel paths of conduction through threads of In 2 O 3 particles and through surrounding SnO 2 matrix, as shown in the a previous study (Manoj, 2007).…”

Section: Sensory Mechanismmentioning

confidence: 86%

“…When spraying a mixture of Sn and In salt solutions on the surface of the heated substrate by aerosol method, the synchronous joint growth of crystals of SnO 2 and In 2 O 3 with different crystal lattices produces the composite film, in which the size and state, and in particular, crystal defects strongly depend on the composition of the film and the spraying conditions. Aerosol synthesis has been used to produce composite films in which the conductivity sharply decreases compared to that of pure nanocrystalline SnO 2 even at low concentrations of In 2 O 3 in the composite (Manoj, et al, 2007). This result indicates the introduction of In +3 ions in the crystal lattice of SnO 2 with ions Sn +4 , accompanied by the formation of electron accepting centers (see, eg, (Yu & Choi, 2001) ).…”

Section: Synthesis Of Metal Oxide Nanocompositesmentioning

confidence: 99%

Gas Semiconducting Sensors Based on Metal Oxide Nanocomposites

Трахтенберг¹,

Герасимов²,

Громов³

et al. 2012

JMSR

View full text Add to dashboard Cite

This paper reviews the important problems associated with the synthesis of metal-oxide nanocomposites, charge transfer phenomena in these composites, their conductive and sensory properties, modeling of sensory effect and the role on this sensory effect of the electronic structure of the metal oxide. The size of metal particles and temperature significantly influence the efficiency of such systems. However, the electronic interactions between the different components of the nanocomposite films play the dominant role in the exploitation of the properties of such sensory systems. Depending on the chemical nature of the analyzed gas and the electronic structure of the semiconducting metal oxides, such interactions can result in either an increase or a decrease of the sensory effect. Thus, by varying the electronic structure of the metal oxide composite sensors as well as the temperature and size of the metal-oxide nanoparticles, the inherent characteristics of the sensor can be changed and tailored for detection of various gases. Such findings clearly open up new opportunities for development of novel selective sensors.

show abstract

“…It is noted that nanofiber films grown in the in present work have high conductivity with comparable transmittance to that of other groups. The comparison of conductivity of ZnO films with that of AZO (Muiva et al 2011) and ITO (Manoj et al 2007) films is shown in Table 4. Since the deposited films are undoped, conductivity of the films are less than that of AZO and ITO films.…”

Section: Electrical Characterizationmentioning

confidence: 99%

Effect of annealing on the properties of zinc oxide nanofiber thin films grown by spray pyrolysis technique

2013

View full text Add to dashboard Cite

Zinc oxide nanofiber thin films have been deposited on glass substrate by spray pyrolysis technique. The X-ray diffraction studies revealed that the films are polycrystalline with the hexagonal structure and a preferred orientation along (002) direction for films annealed for 1 h at 450°C. Further increase in annealing time changes the preferred orientation to (100) direction. The scanning electron microscopic analysis showed the formation of ZnO nanofiber with an average diameter of approximately 800 nm for annealed films. The compositional analysis of nanofiber ZnO thin films were studied by time of flight secondary ion mass spectroscopy, which indicated oxygen deficiency in the films. The optical properties of annealed films have shown a variation in the band gap between 3.29 and 3.20 eV. The electrical conductivity of the as grown and annealed films showed an increase in the conductivity by two orders of magnitude with increase in annealing duration.

show abstract

Preparation and characterization of indium-doped tin oxide thin films

Cited by 111 publications

References 25 publications

Optical Properties of Undoped and Indium-doped Tin Oxide Thin Films

Optical Properties of Undoped and Indium-doped Tin Oxide Thin Films

Gas Semiconducting Sensors Based on Metal Oxide Nanocomposites

Effect of annealing on the properties of zinc oxide nanofiber thin films grown by spray pyrolysis technique

Contact Info

Product

Resources

About