si h thin films deposited by pecvd

... discussion Firstly, the NTO thin films were deposited by sputtering process by using 6 wt% Nb-doped TiO2 target Figure 1 shows the sheet resistances R S of sputtering NTO thin films deposited ... ThanhXuan, Hanoi, Vietnam Pham Van Thanh Faculty of Physics, VNU-University of Science, 334 Nguyen Trai, ThanhXuan, Hanoi, Vietnam Luu Manh Quynh Center for Materials Science, Faculty of Physics, ... min.Figure 5 shows the dependence of (αhνhν)1/2 versus photon energy At higher photon energy, the linear feature is observed, giving the way to extrapolate the Tauc band gap of the NTO thin films The extrapolation

Ngày tải lên: 24/01/2021, 15:20

... results have been achieved: ZnO thin films with a low resistivity in the order of (~2 × 10−4 Ω·cm) have been reached by physical deposition processes [7] While this resistivity value, considered ... The reason why these indium doping values were selected is due to the fact that the ZnO thin films deposited with doping concentrations out of this range showed higher resistivity values The ... progress Hence, thorough studies based on the effect of deposition variables, in chemical techniques, are required in order to achieve high quality films competitive with those obtained by physical

Ngày tải lên: 02/11/2022, 11:39

... of the physical properties of NNO thin films that are generally grown via physical vapor deposition techniques onto similar templates In this paper we report on the growth of NNO thin films by ... NdNiO3, the transition is very sharp and shows an hysteretic behavior akin to a first-order transition Both the temperature at which the transition occurs and the associated resistivity change are ... analysis of the Nd-3d3/2line is hindered by a superposition with the Ni-2s level Therefore, only the Nd-3d5/2level has been fitted by features IV and V which represent the main line and the charge

Ngày tải lên: 04/12/2022, 16:10

... generated enough reachable by chemical methods Thin film coating is achieved by the process of depositing atoms, molecules or ions through chemical reactions Chemical vapor deposition method is used ... characterization, by using a furnace Figure 2.8 Thin films fabrication 2.3 Thin films characterization After finishing the thin films depostion, I proceed to measure the properties of CZO thin ... manufacture thin-film semiconductors such as Si, AIIBVI, AIIIB, transparent conductive thin films like SnO2, In2O3: Sn (ITO), dielectric thin films such as SiO2, Si3N4, BN, Al2O3 and metal thin films

Ngày tải lên: 05/12/2022, 10:45

... verify the role of poly(L-Dopa).The results show that layer-by-layer self-assembly was a simple and useful method to fabricate Nano-structured thin films with low cost and high reusability High transparency ... with ionic charges on their surface can be effectively incorporated into thin films without severe agglomeration by the LBL-SA method (Kim & Sohn, 2002) Figure 3 The principle of Layer-by-layer ... procedure The thickness and surface morphology of the multilayer P25/Poly(L-Dopa) thin films were measured by using a HITACHI SU8010 scanning electron microscopy at 5 kV Differed from the films used

Ngày tải lên: 03/04/2023, 14:41

... 200 nm-thick- films grown on LaAlO3 substrates of (a) Ho0.1Bi0.9FeO3-showing Rhombohedral phase; (b) Ho0.2Bi0.8FeO3-showing Orthorhombic phase; (c) Pr0.1Bi0.9FeO3-showing Rhombohedral phase; and ... (compare the curve seen in Fig 2 (b) for the 20% Sm case with that of the 10% Sm case shown in the inset on the right hand side) It is totally in accord with the structural analysis shown above The ... Earth (RE) - doped BiFeO3 (BFO) thin films were grown on LaAlO3 (LAO) substrates by using pulsed laser deposition technique All of BFO films doped with 10% of RE exhibit a rhombohedral single phase

Ngày tải lên: 16/12/2017, 14:58

... R tăng, minh chứng cho tồn pha SiOx màng Chúng nhận xét trình hình thành tinh thể tùy thuộc vào nồng độ khí hydro trình dòch chuyển pha từ vô đònh hình sang pha tinh thể thông qua pha trung gian ... lý chất rắn 10 CHƯƠNG 1: TỔNG QUAN 1.1 MÀNG SILICON HYDRO HÓA VÔ ĐỊNH HÌNH Màng Silicon hydro hóa vô đònh hình (a- Si:H) màng tạo từ hydro hóa Silicon vô đònh hình phương pháp lắng đọng hóa học ... cm-1 Phổ thu hình 3.15 trừ phổ đế Si Theo nhiều tài liệu tham khảo có ba nhóm cấu trúc mà thể nhận biết từ phổ hồng ngoại đỉnh dao động đặc trưng liên kết Si-H SiH, SiH2, SiH3 Trong vùng phổ từ

Ngày tải lên: 08/04/2019, 14:51

... the hypothesis of the origin of the mechanism of super-hydrophilic effect of the TiO2 material system Layout of the thesis: The thesis consists of the introduction, 5 chapters and the conclusion ... controlled by sol-gel method The nanostructures of TiO2 thin films are controlled The phase transition is inhibited from the anatase configure with high photocatalytic activity of Anatase to Rutile phase ... between them The nature and application of TiO2 is highly dependent on the crystalline structure of the forms and particle size of such forms Among the forms of TiO2, the anatase exhibits higher photocatalytic

Ngày tải lên: 09/01/2020, 15:45

... generated enough reachable by chemical methods Thin film coating is achieved by the process of depositing atoms, molecules or ions through chemical reactions Chemical vapor deposition method is used ... characterization, by using a furnace Figure 2.8 Thin films fabrication 2.3 Thin films characterization After finishing the thin films depostion, I proceed to measure the properties of CZO thin ... manufacture thin-film semiconductors such as Si, AIIBVI, AIIIB, transparent conductive thin films like SnO2, In2O3: Sn (ITO), dielectric thin films such as SiO2, Si3N4, BN, Al2O3 and metal thin films

Ngày tải lên: 11/01/2020, 15:37

... the hypothesis of the origin of the mechanism of super-hydrophilic effect of the TiO2 material system Layout of the thesis: The thesis consists of the introduction, 5 chapters and the conclusion ... controlled by sol-gel method The nanostructures of TiO2 thin films are controlled The phase transition is inhibited from the anatase configure with high photocatalytic activity of Anatase to Rutile phase ... between them The nature and application of TiO2 is highly dependent on the crystalline structure of the forms and particle size of such forms Among the forms of TiO2, the anatase exhibits higher photocatalytic

Ngày tải lên: 15/01/2020, 08:31

... verify the role of poly(L-Dopa).The results show that layer-by-layer self-assembly was a simple and useful method to fabricate structured thin films with low cost and high reusability High transparency ... Trang 1THAI NGUYEN UNIVERSITY UNIVERSITY OF AGRICULTURE AND FORESTRY DUONG CUONG THINH FABRICATION OF PHOTOCATALYTIC THIN FILMS CONTAINING Batch : 2011-1016 Thai Nguyen, 15/09/2016 ... (P25/PDopa)n thin films at wavelength 562 nm, (b) the first-order kinetic plot of ln(C/C0) and time(minutes) for photodegradation of SRB using (P25/PDopa)n thin films at wavelength 562 nm, 33 nm, (b) the

Ngày tải lên: 16/05/2021, 11:47

... walk the narrow pathway between—on the one hand—trying to teach too much at too high a level and—on the other hand— resorting to oversimplifications As with the book as a whole, the emphasis has ... approach problems based on the concepts taught. • Design an Experiment puts the student in a scientist’s shoes by having them think through a given situation, develop a hypothesis, design an ... University of Texas at University Michael Seymour, Hope College Kathy Thrush Shaginaw, Villanova University Susan M Shih, College of DuPage David Shinn, University of Hawaii at Hilo Lewis Silverman,

Ngày tải lên: 14/10/2021, 22:58

... After purification and characterization of these complexes, thin films were deposited on the glass substrates by AACVD The deposited thin films exhibited good substrate adhesion and crystallinity ... 450◦C The as-deposited thin films were smooth and adherent, and showedsignificant changes in the morphology and the size of crystallites depending on the growth temperature 3 Experimental All the ... Energy dispersive X-ray (EDX) analyses of as-deposited thin films of CdS and ZnS from both precursors showed the presence of respective elements A typical EDX graph of ZnS thin films deposited at

Ngày tải lên: 12/01/2022, 23:30

... 100 °C-annealed thin films exhibit the lowest one among all thin films Although reasonably low thickness of thin films, the low transmittance of fabricated thin films within visible region boundaries ... The growing scheme of InxSey thin films (TA: tartaric acid). Figure 2 The formation of InxSey thin films by M-CBD method. Trang 3Table 1 Lattice parameters of the phases that constituting thin ... thin films on substrates, modified chemical bath deposition method (M-CBD) as modified version of chemical bath deposition (CBD) method is still one of the most appropriate techniques for aside

Ngày tải lên: 13/01/2022, 00:27

... phonon is considered like quasi – particles which obey to the kinetic theory of gases, then the thermal conductivity is bound to the phonons mean free pathȜ by the following relationship [14]: 2 ... respectively the thermal conductivity, the thermal diffusivity and the thermal length of the i (f, c, s, b) medium, designating the fluid as ‘f’, the black graphite layer as ‘c’, the substrate ... explained by a stabilisation of the crystalline structure We interpret the decrease of the thermal conductivity with the aluminum proportion by the decreases of the phonons mean free pathȜ As the phonon

Ngày tải lên: 02/11/2022, 10:39

... down by the polarization that weakens the field created by σ The discharge starts with reorientation of dipoles which have short relaxation times and which are present in large amounts This gives ... analyzed by van Turnhout.13 Van Turnhout showed that charged electrets with intrinsic space charges and polarized dipoles produce a transient current density, i(t), which is directly related to the ... accumulated within a diffusive space charge region having an extension in the order of the Debye length, LD The electrical conditions at the opposite air/polymer-solution interface is different Theoreti-cal

Ngày tải lên: 19/11/2022, 11:47

... modular head for the device, where the target can pub-be brought in closer proximity to the hot filament, causing the target to reach higher temperatures,decreasing the resistivity Also, not visible ... beconcluded that the films are of high purity, and the composition is the same as in the target as well, as the data in TableIIIshow There, the stoichiometries, as obtained from various methods, are shown: ... the inflection point of a sigmoidal fit of the Si 2p peak intensity) in order to allow for easier comparison of the profiles ifthe films do not have the same thicknesses, shows that the composition

Ngày tải lên: 04/12/2022, 10:32

... and months which taught me a lesson that life doesn’t stand still, nor wait until you are finished Many things have happened and changed in the time in which I have been involved with this project ... I hereby declare that thesis is my original work and it has been written by me in it’s entirety I have duly acknowledged all the sources of information which have been used in the thesis This ... measurements and helped me understand the intricate physics related I would also want to thank Dr S Saha We have been good friends in the few days that we have known each other He has helped me with Raman...

Ngày tải lên: 08/09/2015, 15:20

... suggested that a higher growth temperature enhanced the growth of the SnO2 phase in the films and improved the crystallinity significantly, thereby increasing the bandgap The increase of bandgap with ... wavelengths The phenomenon that the magnitude of the bandgap shrinkage increased with doping concentration was also observed by other researchers 36 , 37 The shrinkage was explained by the change ... shows the natural logarithm of the growth rate γgrow versus growth temperature With the increase of the growth temperature, the logarithm of growth rate increased linearly This agreed with the...

Ngày tải lên: 16/09/2015, 17:11

... 0.072nm,16 in which Si4 + is the smallest With a high growth temperature, the silicon ions might diffuse from the substrate to the film to form a thin interface layer In this layer, copper had two different ... peak of Si2 p (99eV) appeared which suggested the existence of Si In the meantime, the peak of copper still had considerable intensity This can be explained by the diffusion The radii of Si4 +, Al3+, ... oxygen flow rate had the highest transmittance while the sample with the highest oxygen flow rate showed the lowest transmittance The film at 20sccm showed the transmittance of 33-71% Similar transmittances...

Ngày tải lên: 16/09/2015, 17:11