Effect of the variation of film thickness on the structural and optical properties of ZnO thin films deposited on sapphire substrate using PLD

Shim, Eun Sub; Kang, Hong Seong; Kang, Jeong Seok; Kim, Jong Hoon; Lee, Sang Yeol

doi:10.1016/s0169-4332(01)00746-2

Cited by 125 publications

(40 citation statements)

References 10 publications

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“…Table 1 shows that both the dark current and the photocurrent of the film with 0.05 M sol is maximum indicating maximum number of charge carriers available in that film for the conduction process. It has been found that the number of defect increases with increase in the strain in the film [20,33]. Further, the increase in the defects causes an increase in the carrier concentrations [23].…”

Section: Resultsmentioning

confidence: 99%

Effect of sol concentration on the properties of ZnO thin films prepared by sol–gel technique

Dutta

Mridha

Basak

2008

Applied Surface Science

170

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Section: Resultsmentioning

confidence: 99%

Effect of sol concentration on the properties of ZnO thin films prepared by sol–gel technique

Dutta

Mridha

Basak

2008

Applied Surface Science

170

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“…The film properties are strongly dependent on the deposition process and growth conditions [13][14][15][16][17], and optical or structural heterogeneity can be generated along the growth direction [14,17]. In this research, in order to investigate these evolutions, 300-400 nm thick films were deposited under the two following procedures: (1) in one step, without interruptions, denoted as hereafter continuous process; and (2) using three deposition periods of ∼40 min, with a 5 min growth interruption between two deposition steps.…”

Section: Introductionmentioning

confidence: 99%

In situ spectroscopic ellipsometry study of TiO2 films deposited by plasma enhanced chemical vapour deposition

Carette

Granier

et al. 2013

Applied Surface Science

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“…ZnO thin films are widely used to light-emitting diodes (LED) [4], UV sensors [5,6], solar cells [7,8], surface acoustic wave (SAW) devices and optical wave-guide devices as well [9]. It is well known that ZnO thin films can be prepared by variety of techniques such as sputtering [10,11], laser ablation [12][13][14], chemical vapor deposition [15,16] and sol-gel spin-coating technique [17][18][19][20][21]. Among the above techniques, sol-gel spin-coating technique is relatively appealing and commercially favorable for the preparation of highly-oriented ZnO thin films because of its low cost, well control over the chemical composition of the thin film, the capability of preparing large-size homogeneous thin film and large freedom of choosing dopant as well.…”

Section: Introductionmentioning

confidence: 99%

Effect of Preheating Temperature on Microstructure and Optical Properties of ZnO Thin Films Prepared by Sol-Gel Spin Coating Technique

Wang

Gao

et al. 2016

Acta Phys. Pol. A

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Highly-oriented ZnO thin films prepared by using low-cost technique such as sol-gel technique are of much importance to ZnO-based white light-emitting diodes. The chose of proper preheating temperature in sol-gel technique is still critical for highly-oriented ZnO thin film so far. The mechanisms for the preheating in the formation of ZnO thin film and for the reactions involved in the sol solution have not been clearly stated yet. Thus, in this work, the highly-oriented ZnO thin films were prepared on glass substrates by using sol-gel spincoating technique. The sol solution was prepared by using the two-step method rather than usual one-step method, which facilitates the understanding of the mechanism for the reactions involved in the sol solution. The effect of the preheating temperature on the microstructure and the optical properties of the films were in particular investigated. The mechanisms for the preheating in the formation of the films and for the reactions involved in the sol solution prepared by the two-step method were also proposed in terms of the experimental results. The preheating not only enhances the volatilization of the solvent 2-methoxyethanol and the decomposition of the residual organic species, but also results into the formation of small number of ZnO particles. The preheating temperature of 300• C is most favorable for the highly-oriented ZnO thin film. Increasing the preheating temperature results into the blue shift of the absorption edges of the films. This can be explained by using the quantum-size effect. The photoluminescence spectra of the films show an UV emission at the near-band edge and a broad green-yellow emission at 470-620 nm. The former is closely related to the excitons, while the latter is to the intrinsic defect species in the film.

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Effect of the variation of film thickness on the structural and optical properties of ZnO thin films deposited on sapphire substrate using PLD

Cited by 125 publications

References 10 publications

Effect of sol concentration on the properties of ZnO thin films prepared by sol–gel technique

Effect of sol concentration on the properties of ZnO thin films prepared by sol–gel technique

In situ spectroscopic ellipsometry study of TiO2 films deposited by plasma enhanced chemical vapour deposition

Effect of Preheating Temperature on Microstructure and Optical Properties of ZnO Thin Films Prepared by Sol-Gel Spin Coating Technique

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