ZnO thin film sensor

Mitra, Partha; Chatterjee, A. K.; Maiti, Himadri Sekhar

doi:10.1016/s0167-577x(97)00215-2

Cited by 406 publications

(173 citation statements)

References 13 publications

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“…[13][14][15][16][17][18]. Screen printing, an eco-friendly, economic, suitable for large area deposition technique has been generally used by industries for rapid deposition of thick films over large areas [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Investigation of physical properties of screen printed nanosized ZnO films for optoelectronic applications

Zargar

Arora

Hafiz

2015

Eur. Phys. J. Appl. Phys.

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Abstract. Nanosized ZnO particles derived from chemical co-precipitation route were used for casting ZnO films by screen printing method followed by sintering at two different temperatures. The variation in structural, optical and electrical properties of these films with temperature have been investigated by XRD, SEM, FTIR, Raman, UV-VIS, EPR and four probe analytical techniques. XRD patterns of these films exhibit polycrystalline nature with hexagonal wurtzite structure and SEM images reveal the smooth, dense and without any cracks/damage porous surface morphology. Infrared transmission spectra shows peaks pertaining to Zn-O stretching modes and their multiphonon modes. While Raman spectra exhibited strong peaks of E 2 (high) phonon and overtone of surface phonon mode at 429 cm −1 and 1144 cm −1 respectively with weak components of LO and TO branches. The direct band gap energy of these films showed narrowing of band gap from 3.21 eV to 3.12 eV on increasing sintering temperature from 500 • C to 600 • C. DC conductivity measurements confirmed semiconducting behaviour and showed lowering of activation energy. EPR spectra showed single narrow line resonance signal of g-value ∼ 1.9469 due to oxygen vacancies which are produced during synthesis of ZnO nanoparticles by sol-gel process. These studies revealed that on increasing sintering temperature the crystallinity of the film improves with reduction in lattice deformations in these screen printed ZnO films.

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Section: Introductionmentioning

confidence: 99%

Investigation of physical properties of screen printed nanosized ZnO films for optoelectronic applications

Zargar

Arora

Hafiz

2015

Eur. Phys. J. Appl. Phys.

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“…The above mentioned various types of nanostructures have been synthesized and extensive works have been dedicated to the development of more nanoscale structures. In which mesoporous structures of ZnO have much research interest owing to its photocatalytic applications, as they can provide more surface active sites and make easily charge carrier transport, result in to performance enhancement in all field of applications as mentioned above [9]. The absence of a centre of symmetry in ZnO wurtzite structure, with large electromechanical coupling, results in to strong piezoelectric and pyroelectric properties.…”

Section: Introductionmentioning

confidence: 99%

Hydrothermally Synthesis Nanostructure ZnO Thin Film for Photocatalysis Application

Shinde¹,

Nam²,

Patil³

et al. 2016

KEPCO Journal on Electric Power and Energy

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ZnO has nanostructured material because of unique properties suitable for various applications. Amongst all chemical and physics methods of synthesis of ZnO nanostructure, the hydrothermal method is attractive for its simplicity and environment friendly condition. Nanostructure ZnO thin films have been successfully synthesized on fluorine doped tin oxide (FTO) substrate using hydrothermal method. A possible growth mechanism of the various nanostructures ZnO is discussed in schematics. The prepared materials were characterized by standard analytical techniques, i.e., X-ray diffraction (XRD) and Field-emission scanning electron microscopy (SEM). The XRD study showed that the obtained ZnO nanostructure thin films are in crystalline nature with hexagonal wurtzite phase. The SEM image shows substrate surface covered with nanostructure ZnO nanrod. The UV-vis absorption spectrum of the synthesized nanostructure ZnO shows a strong excitonic absorption band at 365 nm which indicate formation nanostructure ZnO thin film. Photoluminescence spectra illustrated two emission peaks, with the first one at 424 nm due to the band edge emission of ZnO and the second broad peak centered around 500 nm possibly due to oxygen vacancies in nanostructure ZnO. The Raman measurements peaks observed at 325 cm -1 , 418 cm -1 , 518 cm -1 and 584 cm -1 indicated that nanostrusture ZnO thin film is high crystalline quality. We trust that nanostructure ZnO material can be effectively will be used as a highly active and stable phtocatalysis application.

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“…The absence of a center of symmetry in its wurtzite structure and large electrochemical coupling value of 0.33 as compared to 0.1 of quartz, results in strong piezoelectric and pyroelectric properties, which are used in mechanical actuators and sensors [7,8]. The report on UV lasing action of well aligned ZnO nanorod arrays [2,9] stimulate the researchers to synthesise ZnO-based nanowires and rods of different shapes and size on various substrates.…”

Section: Introductionmentioning

confidence: 99%

Substrate effect of hydrothermally grown ZnO nanorods and its luminescence properties

Das

Sahoo

Sarangi

et al. 2013

Journal of Experimental Nanoscience

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We report the hexagonal wurtzite crystalline structure of ZnO nanorod growth by hydrothermal chemical wet synthesis at low temperature (90 C). We have used p-Si (100), n-Si (100), -quartz (0001), MgO (0001) and ITO (polycrystalline) substrates to understand the growth mechanism of ZnO nanorods with a low pressure environment. X-ray diffraction study confirms the hexagonal structure of the ZnO nanorod. Scanning electron microscopy (SEM) also shows the hexagonal structure along with different size and width of the nanorods. The substrate effect of nanorods has been explained on the basis of adatom kinetics during the growth. We observed that the nanorods were grown from a single nucleation point with 4-5 different branches on the ITO substrate with uniform length and width, whereas MgO substrate shows curled flower architecture across the whole area. The photoluminescence illustrates strong substrate effect. A wide range of UV emission bands along with visible emission has been observed from the ZnO nanorods deposited on different substrates.

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ZnO thin film sensor

Cited by 406 publications

References 13 publications

Investigation of physical properties of screen printed nanosized ZnO films for optoelectronic applications

Investigation of physical properties of screen printed nanosized ZnO films for optoelectronic applications

Hydrothermally Synthesis Nanostructure ZnO Thin Film for Photocatalysis Application

Substrate effect of hydrothermally grown ZnO nanorods and its luminescence properties

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