Enhancement of electrical conductivity in sprayed ZnO thin film through zero-energyprocess

Vimalkumar, T.V.; Poornima, N.; Kartha, C. Sudha; Vijayakumar, K. P.; Abe, Takashi; Kashiwaba, Y.

doi:10.1016/j.physb.2010.10.001

Cited by 6 publications

(4 citation statements)

References 21 publications

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“…The reduction in oxygen incorporation results in reduction of the defect O Zn antisite, resulting in reduction of the intensity of DLE. Upon postdeposition treatment, the Zn/O ratio increases (which has been verified using XPS and has already been reported [41]) and the intensity of NBE increases. The resistivity is also reduced by two orders.…”

Section: Resultssupporting

confidence: 83%

“…ZnO thin films were deposited on soda lime glass substrates maintained at 450 ∘ C by spraying 0.3 M solution of zinc acetate dissolved in a mixture of alcohol and water. We had already reported the effectiveness of employing postdeposition treatment (inversion) on improving the resistivity of ZnO thin films by two orders [41]. Hence all the samples prepared were given this inversion treatment in order to have the added benefit of the treatment in addition to the variation in deposition parameters themselves.…”

Section: Experimental Techniquementioning

confidence: 99%

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Reliable and Damage-Free Estimation of Resistivity of ZnO Thin Films for Photovoltaic Applications Using Photoluminescence Technique

Poornima

Vimalkumar

Rajeshmon

et al. 2013

International Journal of Photoenergy

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This work projects photoluminescence (PL) as an alternative technique to estimate the order of resistivity of zinc oxide (ZnO) thin films. ZnO thin films, deposited using chemical spray pyrolysis (CSP) by varying the deposition parameters like solvent, spray rate, pH of precursor, and so forth, have been used for this study. Variation in the deposition conditions has tremendous impact on the luminescence properties as well as resistivity. Two emissions could be recorded for all samples-the near band edge emission (NBE) at 380 nm and the deep level emission (DLE) at ∼500 nm which are competing in nature. It is observed that the ratio of intensities of DLE to NBE (DLE / NBE) can be reduced by controlling oxygen incorporation in the sample.-measurements indicate that restricting oxygen incorporation reduces resistivity considerably. Variation of DLE / NBE and resistivity for samples prepared under different deposition conditions is similar in nature. DLE / NBE was always less than resistivity by an order for all samples. Thus from PL measurements alone, the order of resistivity of the samples can be estimated.

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Section: Resultssupporting

confidence: 83%

Section: Experimental Techniquementioning

confidence: 99%

Reliable and Damage-Free Estimation of Resistivity of ZnO Thin Films for Photovoltaic Applications Using Photoluminescence Technique

Poornima

Vimalkumar

Rajeshmon

et al. 2013

International Journal of Photoenergy

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“…After the deposition, samples were quickly removed from the substrate heater. 45 ZnO films were deposited with ∼550 nm thickness over 30 cm 2 area. ZnO films for gas sensing application were selected after optimizing the various parameters like spray rate, molarity, oxygen stoichiometry and thickness.…”

Section: Film Preparationmentioning

confidence: 99%

Gas sensing application of nanocrystalline zinc oxide thin films prepared by spray pyrolysis

2015

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Nanocrystalline oxygen-deficient ZnO thinfilm sensors were prepared by spray pyrolysis technique using zinc acetate dissolved in propanol and water as precursor. Response of the sensor to target gases NO 2 and H 2 S is studied. At optimum temperature of 200 • C, the sensors have a response of 3.32 to 7 ppm NO 2 and 1.4 to 18 ppm of H 2 S gas. The analytical characterizations of the prepared sensors were performed using X-ray diffraction measurement, scanning electron microscopy, energy-dispersive X-ray spectroscopy and Raman spectroscopy. Dynamic response of sensors to different concentrations of NO 2 and H 2 S gas was tested at optimum temperature. Experimental data revealed the sensors to be more selective to NO 2 gas with satisfactory response and recovery time.

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“…[18][19][20][21][22][23] Compare with physical deposition methods, the mass production cost is low in chemical methods and also it is a userfriendly. Recent days, optically transparent conducting metal oxide (TCO) thin lms have been widely deposited using chemical spray pyrolysis technique, 24,25 it clearly reiterates the chemical spray pyrolysis can act as promising technique to deposit uniform nanoparticles lms with minimum surface defects. On another hand, owing to cost effectiveness, the nanostructured thin lms have been widely prepared by wet chemical methods such as chemical bath deposition and hydrothermal.…”

Section: Introductionmentioning

confidence: 99%

Interface energy barrier tailoring the morphological structure evolution from ZnO nano/micro rod arrays to microcrystalline thin films by Mn doping

Soundarrajan

Sethuraman

2015

RSC Adv.

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Enhancement of electrical conductivity in sprayed ZnO thin film through zero-energyprocess

Cited by 6 publications

References 21 publications

Reliable and Damage-Free Estimation of Resistivity of ZnO Thin Films for Photovoltaic Applications Using Photoluminescence Technique

Reliable and Damage-Free Estimation of Resistivity of ZnO Thin Films for Photovoltaic Applications Using Photoluminescence Technique

Gas sensing application of nanocrystalline zinc oxide thin films prepared by spray pyrolysis

Interface energy barrier tailoring the morphological structure evolution from ZnO nano/micro rod arrays to microcrystalline thin films by Mn doping

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