... Electrospray depositionof polymer thinfilms for organic light-emitting diodes Wontae Hwang1, Guoqing Xin1, Minjun Cho1, Sung Min Cho1, and Heeyeop Chae*2 School ofChemical Engineering, ... applicability of the electrospray process to organic thinfilms in OLEDs was demonstrated in small-scale devices [12] In this work, we demonstrated nanoscale-thick organic thinfilms using the ... patterning, multilayer stacking, and continuous processing of organic thinfilms Experimental details For PLED fabrication, we used a blended solutionof poly(N-vinyl carbazole) [PVK], 2-(4biphenylyl)-5-(4-tert-butylphenyl)-1,3,4-oxadiazole...
... 3.1 Deposition conditions for BTS thinfilms ……………………………39 Table 3.2 Properties of the BTS thinfilms with different thicknesses……………52 Table 3.3 Thickness dependence of P and FD of the BTS thin ... levels of defects often associated with thinfilms are thought to have significant effects [21-23] Studies on ferroelectricthinfilms 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 offerroelectricthin films...
... applications 15 1.3 Processing offerroelectricthinfilms 16 1.3.1 Deposition technologies for ferroelectricthinfilms 16 1.3.2 Chemicalsolutiondeposition (CSD) method .16 ... such as PZN-based thinfilms A polyethylene glycol (PEG)-modified chemicalsolutiondeposition (CSD) will be employed to prepare the ferroelectricthinfilms Chemistry of the solution has dramatic ... challenging By contrast, solutiondeposition as described below offers excellent control of the chemistry and composition of the thin film [78] A further advantage ofsolutiondeposition routes is...
... Journal of Science, Mathematics - Physics 24 (2008) 119-123 (a) (b) Fig SEM images of CdS thinfilms 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 thinfilms as grown Inset shows XRD pattern of the CdS thinfilms reported in [9] Table Standard ... photoluminescence spectrum of the as-prepared CdS thinfilms Conclusions In this work, we show a route to the depositionof CdS thin film on glass substrates using CBD technique from heated solutions with...
... reproduction of the stoichiometry of the charged material and in situ depositionof 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 ofthinfilmsof Ti1-xTaxO2 PLD technique has been used for the film fabrication X-ray diffraction (XRD) studies have been carried out on the epitaxially grown thinfilms on STO...
... 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 thinfilms ... 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 thinfilms 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...
... (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...
... 89 3.3 Depositionof epitaxial SrRuO3 films 92 3.3.1 Control of SrRuO3 film composition 92 3.3.2 Surface morphology of SrRuO3 films in dependence ofdeposition temperature, ... deposition technique 2.1.1 Principle of the method Metal-organic chemical vapour deposition is an attractive deposition technique for the growth ofthin epitaxial thinfilms since it has some advantages ... for the epitaxial growth offerroelectricfilms SrRuO3 was selected because it is chemically stable and has a structural similarity to most perovskite substrates and thinfilms and has a good electrical...
... conclusion, by chemical vapor depositionof 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 depositionof 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...
... properties of CdS thinfilms grown by chemical bath depositionThin Solid Films 2009, 518:1259-1262 Liu F, Lai Y, Liu J, Wang B, Kuang S, Zhang Z, Li J, Liu Y: Characterization ofchemical bath ... CdS thinfilms at different deposition temperature J Alloys Comp 2010, 493:305-308 Goudarzi A, Aval GM, Sahraei R, Ahmadpoor H: Ammonia-free chemical bath depositionof nanocrystalline ZnS thin ... thinfilms 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...
... size distribution as well In the present investigation, the synthesis of silver nanoparticles and thinfilms by wet chemicalsolution route [27] has been discussed The prepared silver nanoparticles ... aqueous solutionof 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...
... in the results and are coated by plenty of amorphous carbons Conclusions A temperature window of SWCNTs growth by catalytic chemical vapor depositionof 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...
... pre-treatment and depositionof protective coating 44 4.2.1 Application of FCVA technique for bombardment of the surface of the samples with energetic C+ ions and depositionof ta-C thin film ... ions of 350 eV prior to depositionof 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...
... 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 thinfilms in organic solution ... doped WO3 thinfilms 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 thinfilms with different...
... and coefficients of thermal expansion of amorphous Cu-Zr thinfilms - 162 7.1 Measurement of Young’s modulus of amorphous Cu-Zr thinfilms - 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 thinfilms 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...
... titanate ferroelectricthinfilms 121 6.2 Ba0.1Sr0.9TiO3 thinfilms 124 6.2.1 Preparation of Ba0.1Sr0.9TiO3 target 125 6.2.2 Preparation of Ba0.1Sr0.9TiO3 thinfilms 126 6.2.3 Crystallinity of the ... Ba0.1Sr0.9TiO3 thinfilms 127 6.2.4 129 6.2.5 6.3 Surface morphology of the Ba0.1Sr0.9TiO3 thinfilms Microwave permittivity characterization of Ba0.1Sr0.9TiO3 thinfilms 129 Epitaxial YBCO/BST/LAO/YBCO thin ... complex permittivity of the ferroelectricthinfilms The applications of HTS thinfilms in the fabrication of high quality factor microstrip resonators were studied A novel type of miniaturized microstrip...
... 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 filmsof ... 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 ofchemical cross-linking modification 53 Figure 3.6 FTIR spectra of 6FDA-Durene Films...
... properties of FePt-Ag thin films, the first step is to fabricate the materials Characterization of the thinfilms provided information about structural and magnetic information of FePt-Ag thinfilms ... illustration of cosputtered FePt-Ag thinfilms 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 thinfilms 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...
... 5.2.1 Crystallization of Bi1.5 Zn1.0 Nb1.5 O7 thinfilms ……………90 5.2.2 Morphology of Bi1.5 Zn1.0 Nb1.5 O7 thinfilms ……………… 92 Dielectric properties of Bi1.5 Zn1.0 Nb1.5 O7 thinfilms and their varactors…………………………………………………………… ... processing of complex ferroelectric oxide and monolithically compatible processing offerroelectric thin- film compounds, thin film ferroelectric materials were inspired wide investigation instead of ... loss offerroelectricthin film is probably the main area of concern in the development offerroelectricfilms for microwave applications, where the losses need to be reduced further if such films...
... promise the realization offerroelectricthin film optical applications 1.2 Limitations ofFerroelectricThinFilms Despite the unique electrical properties offerroelectricthinfilms that assure ... VII LIST OF TABLES .IX LIST OF FIGURES X Chapter 1.1 FERROELECTRICTHINFILMS Applications ofFerroelectricThinFilms .2 1.1.1 Thin Film Capacitors ... FERROELECTRICTHINFILMS CHAPTER FERROELECTRICTHINFILMS Ferroelectricity, which was first discovered by Valasek [1] in 1920, is a result of a collective behavior of many interacting dipoles [2] Ferroelectric...