chemical solution deposition of ferroelectric thin films

... Electrospray deposition of polymer thin films for organic light-emitting diodes Wontae Hwang1, Guoqing Xin1, Minjun Cho1, Sung Min Cho1, and Heeyeop Chae*2 School of Chemical Engineering, ... applicability of the electrospray process to organic thin films in OLEDs was demonstrated in small-scale devices [12] In this work, we demonstrated nanoscale-thick organic thin films using the ... patterning, multilayer stacking, and continuous processing of organic thin films Experimental details For PLED fabrication, we used a blended solution of poly(N-vinyl carbazole) [PVK], 2-(4biphenylyl)-5-(4-tert-butylphenyl)-1,3,4-oxadiazole...

Ngày tải lên: 20/06/2014, 23:20

... 3.1 Deposition conditions for BTS thin films ……………………………39 Table 3.2 Properties of the BTS thin films with different thicknesses……………52 Table 3.3 Thickness dependence of P and FD of the BTS thin ... levels of defects often associated with thin films are thought to have significant effects [21-23] Studies on ferroelectric thin films are therefore complicated The performance of a specific ferroelectric ... decibel of loss (figure of merit) The ideal value of the loss tangent is required to be in the range of 0.01 or less [30] Accordingly, the importance of low dielectric loss of ferroelectric thin films...

Ngày tải lên: 10/09/2015, 15:48

... applications 15 1.3 Processing of ferroelectric thin films 16 1.3.1 Deposition technologies for ferroelectric thin films 16 1.3.2 Chemical solution deposition (CSD) method .16 ... such as PZN-based thin films A polyethylene glycol (PEG)-modified chemical solution deposition (CSD) will be employed to prepare the ferroelectric thin films Chemistry of the solution has dramatic ... challenging By contrast, solution deposition as described below offers excellent control of the chemistry and composition of the thin film [78] A further advantage of solution deposition routes is...

Ngày tải lên: 16/09/2015, 08:31

... Journal of Science, Mathematics - Physics 24 (2008) 119-123 (a) (b) Fig SEM images of CdS thin films prepared in the bath with ml of 1M CdSO4 solution for 9h (a) and with 25 ml of 1M CdSO4 solution ... (111), (200), (220), and (311) planes of cubic CdS [10] Fig Typical X-ray diffractogram of CdS thin films as grown Inset shows XRD pattern of the CdS thin films reported in [9] Table Standard ... photoluminescence spectrum of the as-prepared CdS thin films Conclusions In this work, we show a route to the deposition of CdS thin film on glass substrates using CBD technique from heated solutions with...

Ngày tải lên: 14/03/2014, 13:20

... reproduction of the stoichiometry of the charged material and in situ deposition of oxides without the requirement of any post -deposition process adds to the advantage of the technique On top of all ... measure the magnetic properties of the samples Pulsed Laser Deposition Technique Pulsed laser deposition (PLD) has clearly emerged as one of the premier thin film deposition techniques for multi-elemental ... characterization technique of thin films of Ti1-xTaxO2 PLD technique has been used for the film fabrication X-ray diffraction (XRD) studies have been carried out on the epitaxially grown thin films on STO...

Ngày tải lên: 08/09/2015, 15:20

... orientations of MgO films 47 3.3.4 The influence of target-substrate distance on film quality 50 3.4 Conclusions 52 3.5 References 54 High perpendicular coercive field of (100)-oriented CoFe2O4 thin films ... mechanism study of our CoFe2O4 films 62 4.4 Conclusions 70 4.5 References 72 Room temperature ferroelectric, ferromagnetic and magnetoelectric properties of Ba-doped BiFeO3 thin films on silicon ... loop of the BBFO films at room temperature 84 Figure 5.5 The magnetic hystersis loop of the BBFO films at room temperature 86 Figure 5.6 The dielectric constant of the BBFO films as a function of...

Ngày tải lên: 07/10/2015, 10:10

... (Color online) PL spectra of the as-grown ZnO films before and after N2 O treatment for 665 s 3.4 XRD, PL, and XPS measurements of ZnO films In order to determine the cause of the enhancement-mode ... same as those of the samples used for fabricating TFTs 3.4.1 XRD and PL The XRD spectra of the as-grown and N2 O-treated ZnO samples are shown in Fig The intensity of the (0002) peak of the N2 O-treated ... by the use of an insulating glass substrate Because of this, all spectra were calibrated using C 1s at 284.6 eV as a reference Figure shows the XPS spectra of O 1s on the surface of as-grown...

Ngày tải lên: 05/03/2014, 21:20

... 89 3.3 Deposition of epitaxial SrRuO3 films 92 3.3.1 Control of SrRuO3 film composition 92 3.3.2 Surface morphology of SrRuO3 films in dependence of deposition temperature, ... deposition technique 2.1.1 Principle of the method Metal-organic chemical vapour deposition is an attractive deposition technique for the growth of thin epitaxial thin films since it has some advantages ... for the epitaxial growth of ferroelectric films SrRuO3 was selected because it is chemically stable and has a structural similarity to most perovskite substrates and thin films and has a good electrical...

Ngày tải lên: 14/03/2014, 19:20

... conclusion, by chemical vapor deposition of silane, the large-scale SiNWs were grown under the catalysis of Fe particles at the lower temperature – 450 °C These nanowires have a diameter of 50–70 nm ... al / Chemical Physics Letters 411 (2005) 198–202 not only have a size-confined effect on the growth of SiNWs, but also facilitate the pyrolysis and deposition of silane on iron and growth of the ... fourier transform of the outer layer of the triangle (indicated by arrow) depicting lattice spacing of Si(1 1) of 0.31 nm, Si(2 1) of 0.22 nm and Si(2 0) of 0.38 nm, respectively, the bottom-right...

Ngày tải lên: 16/03/2014, 15:06

... properties of CdS thin films grown by chemical bath deposition Thin Solid Films 2009, 518:1259-1262 Liu F, Lai Y, Liu J, Wang B, Kuang S, Zhang Z, Li J, Liu Y: Characterization of chemical bath ... CdS thin films at different deposition temperature J Alloys Comp 2010, 493:305-308 Goudarzi A, Aval GM, Sahraei R, Ahmadpoor H: Ammonia-free chemical bath deposition of nanocrystalline ZnS thin ... thin films grown by atomic layer deposition for electroluminescent applications Appl Surf Sci 2004, 229:105-111 12 Zhang R, Wang B, Wei L: Influence of RF power on the structure of ZnS thin films...

Ngày tải lên: 20/06/2014, 21:20

... size distribution as well In the present investigation, the synthesis of silver nanoparticles and thin films by wet chemical solution route [27] has been discussed The prepared silver nanoparticles ... aqueous solution of AgNO (1 mol/l) has been dropped in the previous solution After refluxing for 60 min, the colloidal solution has been allowed to cool slowly to room temperature The resultant solution ... peaks correspond to the carbon coated copper grid of TEM No peaks of other impurity have been detected Therefore, the EDX profile of sample (inset of Figure 2) indicates that the silver nanoparticles...

Ngày tải lên: 21/06/2014, 02:20

... in the results and are coated by plenty of amorphous carbons Conclusions A temperature window of SWCNTs growth by catalytic chemical vapor deposition of CH4 over Mo-Fe/MgO catalyst has been studied ... the influence of growth temperature on the purity of prepared tube samples, we give the curve (Fig 4) showing the dependence of ID/IG on the growth temperature From Fig 4, two kinds of ID/IG distributions ... the self-decomposition of CH4 The temperature window of SWCNTs efficiently growth is between 800 and 950 °C, and the optimum growth temperature is about 900 °C Fig Influence of growth temperature...

Ngày tải lên: 22/06/2014, 00:20

... pre-treatment and deposition of protective coating 44 4.2.1 Application of FCVA technique for bombardment of the surface of the samples with energetic C+ ions and deposition of ta-C thin film ... ions of 350 eV prior to deposition of a 10 nm ta-C overcoat The effect of this surface treatment on the structure of the ta-C/AlTiC interface, chemical state of the overcoat and wear resistance of ... spectra of the top surface of the Co-Si/C sample (take off angle of 5°) 159 Figure 10-4 XPS Co2p/3 spectrum of the Co/Si mixed layer (interface of Co film and Si/C layer) at take off...

Ngày tải lên: 09/09/2015, 10:17

... Hydrothermal deposition 37 2.2 Preparation of Samples Used for Anodic Anodization 38 2.2.1 Film deposition by magnetron sputtering 38 2.2.2 Anodization of W/Ti thin films in organic solution ... doped WO3 thin films show two layer structures consisting of nanopillars on top of a compact layer with uniform Ti/W atomic ratio of 4:1 In the present work, on the one hand, this thin film presents ... the TiO2 doped WO3 thin film but this time the film is produced by the co-anodization of co-sputtered Ti/W thin film in an organic solution The purpose is to obtain the thin films with different...

Ngày tải lên: 09/09/2015, 11:16

... and coefficients of thermal expansion of amorphous Cu-Zr thin films - 162 7.1 Measurement of Young’s modulus of amorphous Cu-Zr thin films - 162 7.1.1 Analytical model ... analysis, respectively, of the density changes in Cu-Zr and Zr-Cu-Al systems The measurement of Young’s moduli and coefficients of thermal expansion of amorphous Cu-Zr thin films will be covered ... The yield stress of a material σTS: The tensile strength of a material E: The Young’s modulus of a material υ: The Poisson’s ratio of a material M: The biaxial modulus of a thin film εm: The...

Ngày tải lên: 11/09/2015, 09:16

... titanate ferroelectric thin films 121 6.2 Ba0.1Sr0.9TiO3 thin films 124 6.2.1 Preparation of Ba0.1Sr0.9TiO3 target 125 6.2.2 Preparation of Ba0.1Sr0.9TiO3 thin films 126 6.2.3 Crystallinity of the ... Ba0.1Sr0.9TiO3 thin films 127 6.2.4 129 6.2.5 6.3 Surface morphology of the Ba0.1Sr0.9TiO3 thin films Microwave permittivity characterization of Ba0.1Sr0.9TiO3 thin films 129 Epitaxial YBCO/BST/LAO/YBCO thin ... complex permittivity of the ferroelectric thin films The applications of HTS thin films in the fabrication of high quality factor microstrip resonators were studied A novel type of miniaturized microstrip...

Ngày tải lên: 16/09/2015, 08:30

... profile of 6FDA- Durene polyimide dense films with different thickness, thus to correlate the aging of hollow fiber containing a thin and dense selective layer with the aging of dense films of ... of thick and thin Fluoropolyimide Films Chapter addresses the discussion of an accelerated CO2 Plasticization observation of ultra -thin polyimide films and the effect of surface chemical cross-linking ... series of SEM pictures of a thin film (Scale bar: Upper: 10 µm, Middle: µm, Bottom: µm) 51 Figure 3.5 Mechanism of chemical cross-linking modification 53 Figure 3.6 FTIR spectra of 6FDA-Durene Films...

Ngày tải lên: 26/09/2015, 10:13

... properties of FePt-Ag thin films, the first step is to fabricate the materials Characterization of the thin films provided information about structural and magnetic information of FePt-Ag thin films ... illustration of cosputtered FePt-Ag thin films 43 viii List of Figures Figure 3-8 XRD scans of (FePt)1-x-Agx films on CrRu underlayer 44 Figure 3-9 FePt grain size as a function of Ag content ... fitting of AXS data of 450 nm Ag thin film and 450 nm FePt thin films co-sputtered with 20 vol.% and 30 vol.% Ag 69 Figure 4-15 Fourier transfer of the Fe K edge EXAFS spectra of Fe foil...

Ngày tải lên: 30/09/2015, 06:41

... 5.2.1 Crystallization of Bi1.5 Zn1.0 Nb1.5 O7 thin films ……………90 5.2.2 Morphology of Bi1.5 Zn1.0 Nb1.5 O7 thin films ……………… 92 Dielectric properties of Bi1.5 Zn1.0 Nb1.5 O7 thin films and their varactors…………………………………………………………… ... processing of complex ferroelectric oxide and monolithically compatible processing of ferroelectric thin- film compounds, thin film ferroelectric materials were inspired wide investigation instead of ... loss of ferroelectric thin film is probably the main area of concern in the development of ferroelectric films for microwave applications, where the losses need to be reduced further if such films...

Ngày tải lên: 04/10/2015, 10:26

... promise the realization of ferroelectric thin film optical applications 1.2 Limitations of Ferroelectric Thin Films Despite the unique electrical properties of ferroelectric thin films that assure ... VII LIST OF TABLES .IX LIST OF FIGURES X Chapter 1.1 FERROELECTRIC THIN FILMS Applications of Ferroelectric Thin Films .2 1.1.1 Thin Film Capacitors ... FERROELECTRIC THIN FILMS CHAPTER FERROELECTRIC THIN FILMS Ferroelectricity, which was first discovered by Valasek [1] in 1920, is a result of a collective behavior of many interacting dipoles [2] Ferroelectric...

Ngày tải lên: 07/10/2015, 10:18