Transparent, amorphous and organics-free ZnO thin films produced by chemical solution deposition at 150°C

Tellier, Jenny; Kuščer, Danjela; Malič, Barbara; Cilenšek, Jena; Škarabot, Miha; Kovač, Janez; Gonçalves, Gonçalo; Muševič, Igor; Kosec, Marija

doi:10.1016/j.tsf.2010.03.010

Cited by 22 publications

(18 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…3g) is 84% at the wavelength of 450 nm and increases slightly with increasing wavelength. Such transmittance is comparable to the reported values for 50-150 nm thick ZnO films prepared by CSD with the transmittances of 81-87% [9]. Such high transmittance of the seed-layer is a consequence of its low thickness and very small and highly connected ZnO grains.…”

supporting

confidence: 87%

“…For even thicker layers multiple deposition cycles must be used. In such case, the thickness of the resulting layer does not increase linearly with the increasing number of depositions due to partial penetration of the solution into the pores of the underlying layers, as reported previously [9]. The speed and the time of spin-coating also influenced the layer thickness.…”

supporting

confidence: 57%

“…According to the literature, Zn‐acetate decomposes to ZnO at about 355 °C . The XRD data from the dried precursor film prepared from the 0.50 M solution after calcination at 350 and 600 °C are shown in Fig.…”

Section: Resultsmentioning

confidence: 95%

See 2 more Smart Citations

Parametric study of seed‐layer formation for low‐temperature hydrothermal growth of highly oriented ZnO films on glass substrates

Podlogar

Vengust

Richardson

et al. 2013

Physica Status Solidi (a)

View full text Add to dashboard Cite

Applications involving transparent conducting films (TCFs), such as flat‐panel displays and touch screens technologies, are dominated by indium‐tin‐oxide (ITO). Increasing prices of indium in hand with weaknesses of ITO films make a strong argument for alternative TCFs with competitive characteristics and lower price. Here we demonstrate the potential of highly oriented zinc oxide (ZnO) films grown on glass substrates under low‐temperature hydrothermal (HT) conditions at 90 °C from aqueous solutions of Zn‐nitrate and Na‐citrate. Formation of a continuous ZnO seed‐layer with proper thickness, grain size, connectivity, and orientation of seed‐grains on glass is shown to be essential to achieve conditions for the growth of highly oriented (0001), smooth, transparent, and conductive ZnO films according to the spatially confined oriented growth (SCOG) mechanism. The film grown on homogeneous seed‐layer with grain size of about 20 nm showed optical transmittance of up to 82% and relatively low resistivity for undoped ZnO ceramic in order of few 100 Ω sq−1. Such characteristics are explained by highly oriented crystalline texture and high coalescence of ZnO crystals in these films.

show abstract

supporting

confidence: 87%

supporting

confidence: 57%

See 1 more Smart Citation

Parametric study of seed‐layer formation for low‐temperature hydrothermal growth of highly oriented ZnO films on glass substrates

Podlogar

Vengust

Richardson

et al. 2013

Physica Status Solidi (a)

View full text Add to dashboard Cite

show abstract

“…The acetate groups were identified up to 300°C in 150–200‐nm‐thick films and at least 50°C higher in about 300‐nm‐thick films 50–52 . In our earlier study of about 50‐nm‐thick solution‐derived ZnO thin films heated at 150°C, both FTIR and XPS analysis revealed that the films were inorganic 35 . In this study, the thicknesses of IZO CSD films after each deposition and of printed structures were about 40–50 nm and we think that heating at 150°C, which had been proven effective in solution‐derived ZnO films also, 35 contributed to oxidation and/or evaporation of organic residues.…”

Section: Resultsmentioning

confidence: 93%

“…The films were transparent, with a transmission of over 80% in the visible range. The resistivity of the 120‐nm‐thick ZnO films processed at 150°C was 57 MΩ·cm and upon heating at 450°C, it decreased to 1.9 kΩ·cm 35 …”

Section: Introductionmentioning

confidence: 99%

Ink‐Jet Printing of In₂O₃/ZnO Two‐Dimensional Structures from Solution

Tellier

Malič

Kuščer

et al. 2011

Journal of the American Ceramic Society

View full text Add to dashboard Cite

In 2 O 3 -ZnO two-dimensional (2D) structures were processed by ink-jet printing and heating at 1501C and 4501C with the aim for implementation in transparent electronics. The In-Zn-solution precursor, based on In-alkoxide and Zn-acetate in 2-methoxyethanol, was originally designed for chemical solution deposition of thin films. To adapt it for piezoelectric ink-jet printing, the viscosity and surface tension were adjusted by the addition of a more viscous 1,3-propanediol. The optimum values were obtained for the ink consisting of 55 vol% of 1,3-propanediol. The printing parameters including the temperatures of the cartridge and the substrate, and the drop spacing were adjusted to allow patterning with a 40 lm resolution on SiO x /Si and glass substrates. The ink-jet-printed 2D structures heated at 1501C were amorphous and according to infrared spectroscopy organicsfree, and upon heating at 4501C they crystallized without any preferential orientation, similarly as the spin-coated thin films, which were studied as a reference.

show abstract

Growth of Transparent and Conductive Polycrystalline (0001)‐ZnO Films on Glass Substrates Under Low‐Temperature Hydrothermal Conditions

Podlogar

Richardson

Vengust

et al. 2012

Adv Funct Materials

View full text Add to dashboard Cite

Flat panel display technology seems to be an ever-expanding fi eld developing into a multibillion dollar market. A set of technical solutions involve a transparent conducting fi lm (TCF) that is today still dominated by indiumtinoxide (ITO). In a race to fi nd alternatives that would avoid the indium pitfalls, mainly due to its increasing price and limited natural availablity, replacement materials have been extensively investigated. This work demonstrates that by exploiting basic principles of crystal growth in geometrically constrained conditions, zinc oxide (ZnO) could easily be utilized for this purpose. ZnO layers were grown on inexpensive glass substrates via lowtemperature citrateassisted hydrothermal (HT) method. It was shown that in the nucleation stage the crystal growth can be effi ciently controlled by spatially confi ned oriented growth (SCOG) mechanism to produce smooth and dense (0001) oriented polycrystalline ZnO fi lms with superb optical properties. Our products show optical transparency of 82% and surprisingly low sheet resistance for undoped ZnO, only in the order of few 100 Ω sq − 1 . We believe that a very high degree of selforganization between the ZnO crystals in our polycrystalline fi lms grown under controlled SCOG conditions is main reason for the highest so far reported transparency to conductivity ratio for undoped ZnO thin fi lm ceramics.conductivity which meet the high standards for many photonic and/or electronic applications.

show abstract

Transparent, amorphous and organics-free ZnO thin films produced by chemical solution deposition at 150°C

Cited by 22 publications

References 51 publications

Parametric study of seed‐layer formation for low‐temperature hydrothermal growth of highly oriented ZnO films on glass substrates

Parametric study of seed‐layer formation for low‐temperature hydrothermal growth of highly oriented ZnO films on glass substrates

Ink‐Jet Printing of In₂O₃/ZnO Two‐Dimensional Structures from Solution

Growth of Transparent and Conductive Polycrystalline (0001)‐ZnO Films on Glass Substrates Under Low‐Temperature Hydrothermal Conditions

Contact Info

Product

Resources

About

Transparent, amorphous and organics-free ZnO thin films produced by chemical solution deposition at 150°C

Cited by 22 publications

References 51 publications

Parametric study of seed‐layer formation for low‐temperature hydrothermal growth of highly oriented ZnO films on glass substrates

Parametric study of seed‐layer formation for low‐temperature hydrothermal growth of highly oriented ZnO films on glass substrates

Ink‐Jet Printing of In2O3/ZnO Two‐Dimensional Structures from Solution

Growth of Transparent and Conductive Polycrystalline (0001)‐ZnO Films on Glass Substrates Under Low‐Temperature Hydrothermal Conditions

Contact Info

Product

Resources

About

Ink‐Jet Printing of In₂O₃/ZnO Two‐Dimensional Structures from Solution