Search results for: Yaw-Shyan Fu

Items from 1 to 20 out of 20 results

article

Single-phase, high-purity Cu2ZnSnS4 nanoparticles via a hydrothermal route

Shih-Jen Lin, Jyh-Ming Ting, Yaw-Shyan Fu

Ceramics International > 2018 > 44 > 4 > 4450-4456

Highly ordered quaternary semiconductor Cu₂ZnSnS₄ (CZTS) nanoparticles (NPs) have been prepared via a simple conventional-hydrothermal approach, with a band gap of ~ 1.5eV and a high absorption coefficient greater than 10⁴cm⁻¹. In this paper, we report on the synthesis and characterization of CZTS NPs with controlled phase purity. The NPs were synthesized under various thiourea (Tu) concentrations,...

article

CuInS2 nanowires prepared using a hydrothermal process through a polymer-type ion release source

Ming-Hung Chiang, Wen-Tai Lin, Bo-Sheng Wang, Kuo-Chin Hsu, more

Ceramics International > 2017 > 43 > 7 > 5819-5822

Chalcopyrite copper indium sulfide (CuInS₂, CIS) has a bandgap that is optimal for a solar energy conversion material. In this paper, we used a polymer-type ion release source to control the precursor concentration of the hydrothermal system to grow CIS nanowires. The analytical results indicate that the reaction process is based on the formation of CuS binary compound, which is then followed by indium...

article

NiO_x Electrode Interlayer and CH₃NH₂/CH₃NH₃PbBr₃ Interface Treatment to Markedly Advance Hybrid Perovskite‐Based Light‐Emitting Diodes

Yi‐Kai Chih, Jian‐Chih Wang, Rei‐Ting Yang, Chi‐Ching Liu, more

Advanced Materials > 28 > 39 > 8687 - 8694

The performance of hybrid perovskite‐based light‐emitting diodes (LEDs) is markedly enhanced by the application of a NiO_x electrode interlayer and moderate methylamine treatment. A hybrid perovskite‐based LED exhibits a peak luminous efficiency of 15.9 cd A⁻¹ biased at 8.5 V, 407.65 mA cm⁻², and 65 300 cd m⁻², showing a distinctive impact for future applications.

article

Microwave-assisted electrospun PVB/CdS composite fibers and their photocatalytic activity under visible light

Pei-Ying Lin, Zong-Sian Wu, Yung-Der Juang, Yaw-Shyan Fu, more

Microelectronic Engineering > 2016 > 149 > Complete > 73-77

Degradation of dyes is a standard method for checking the photocatalytic activity of any type of photocatalyst. In this paper, one-dimensional (1-D) poly-vinyl butyral (PVB)/cadmium sulfide (CdS) nanofibers have been first prepared by using cadmium nitrate and thiourea dissolved in a solvent of ethanol and the polymer used poly-vinyl butyral via electrospinning approach. The as-spun 1-D PVB/CdS nanofibers...

article

Solvothermal synthesis and tunable bandgap of Cu2(Zn1−xCox)SnS4 and Cu2(Fe1−xCox)SnS4 nanocrystals

Kai-Liang Huang, Cheng-Hao Huang, Wen-Tai Lin, Yaw-Shyan Fu, more

Journal of Alloys and Compounds > 2015 > 646 > C > 1015-1022

The tunable bandgap of Cu₂(Zn_1−xCo_x)SnS₄ and Cu₂(Fe_1−xCo_x)SnS₄ nanocrystals synthesized by the one-pot and hot-injection methods respectively was explored as a function of the Co concentration. The Co(CH₃COO)₂ precursor is superior to Co(NO₃)₂ and CoCl₂ ones in enhancing the growth of pure and stoichiometric Cu₂CoSnS₄ (CCTS) nanocrystals. During synthesis of pure Cu₂(Zn_1−xCo_x)SnS₄ nanocrystals at...

article

Polyvinylbutyral‐assisted synthesis and characterization of SnS mesoporous fibers via electrospinning process

Kuo‐Chin Hsu, Dong‐Yang Wu, Pei‐Ying Lin, Yaw‐Shyan Fu, more

Journal of Applied Polymer Science > 132 > 33 > n/a - n/a

Tin sulfide (SnS) has the potential to be used as a low‐cost absorber material for applications in thin film photovoltaic solar cells. In this study, polyvinylbutyral/SnS (PVB/SnS) composite fibers were synthesized through a relatively simple electrospinning process. SnS mesoporous fibers were obtained from PVB/SnS composite fibers after sintering treatment at 500°C for 1 h in N₂ atmosphere. The SnS...

article

Effects of Ge- and Sb-doping and annealing on the tunable bandgaps of SnS films

Hsuan-Tai Hsu, Ming-Hung Chiang, Chen-Hao Huang, Wen-Tai Lin, more

Thin Solid Films > 2015 > 584 > Complete > 37-40

SnS, Ge- and Sb-doped SnS films with single orthorhombic SnS phase were fabricated via solvothermal routes and subsequent spin-coating, respectively. The substitution solubilities of Ge and Sb in SnS are about 6 and 5at.%, respectively. The bandgaps of Ge- and Sb-doped SnS films can be tuned in the ranges of 1.25–1.35 and 1.30–1.39eV, respectively. The possible mechanisms for the tunable bandgaps...

article

Effects of hydrazine on the solvothermal synthesis of Cu2ZnSnSe4 and Cu2CdSnSe4 nanocrystals for particle-based deposition of films

Ming-Hung Chiang, Yaw-Shyan Fu, Cheng-Hung Shih, Chun-Cheng Kuo, more

Thin Solid Films > 2013 > 544 > Complete > 291-295

The effects of hydrazine on the synthesis of Cu₂ZnSnSe₄ (CZTSe) and Cu₂CdSnSe₄ (CCTSe) nanocrystals in an autoclave as a function of temperature and time were explored. On heating at 190°C for 24-72h, pure CZTSe and CCTSe nanocrystals could readily grow in the hydrazine-added solution, while in the hydrazine-free solution the intermediate phases such as ZnSe, Cu₂Se, and Cu₂SnSe₃, and Cu₂SnSe₃ and...

article

Effects of Zn precursors on solvothermal synthesis of Cu2ZnSnSe4 nanocrystals

Ming-Hung Chiang, Yaw-Shyan Fu, Tzung-Fang Guo, Hsiang-Lin Liu, more

Materials Letters > 2012 > 83 > Complete > 192-194

Cu ₂ ZnSnSe ₄ (CZTSe) has potential applications in thin film solar cells and thermoelectric devices. The synthesis of stoichiometric CZTSe nanocrystals by the solvothermal process is still a challenge. In this work, the effects of different Zn precursors on the synthesis of pure and stoichiometric CZTSe nanocrystals via a facile solvothermal process were explored. The products were...

article

Fabrication of CuInSe2 light absorption materials from binary precursors via wet chemical process

Pei-Ying Lin, Yaw-Shyan Fu

Materials Letters > 2012 > 75 > Complete > 65-67

CuInSe ₂ materials with a chalcopyrite structure were successfully synthesized from binary precursors through the reaction paths: (A) Cu ₂ Se+In ₂ Se ₃ →2CuInSe ₂ , (B) CuSe+InSe→CuInSe ₂ , (C) Cu ₂ Se+2InSe+Se→2CuInSe ₂ via a wet-chemical process. The binary precursors such as CuSe, Cu ₂ Se, InSe and In ₂ Se ₃ ...

article

Synthesis and characterization of PVP/LiCoO₂ nanofibers by electrospinning route

Lin‐Jer Chen, Jiunn‐Der Liao, Yu‐Ju Chuang, Kuo‐Chin Hsu, more

Journal of Applied Polymer Science > 121 > 1 > 154 - 160

We have successfully prepared PVP/LiCoO₂ nanofibers using an electrospinning route. These fibers were composed of very small crystalline grains uniformly linked with an average size. After annealing of the above precursor fibers at 700°C for 12 h, LiCoO₂ nanofibers with 95 nm in diameter were composed of crystalline nanoparticles were successfully obtained. The morphology, crystal structure, and particle...

article

Synthesis and Characterization of Cu(In _x B _{1− x} )Se ₂ Nanocrystals for Low-Cost Thin Film Photovoltaics

Lin-Jer Chen, Jiunn-Der Liao, Yu-Ju Chuang, Yaw-Shyan Fu

Journal of the American Chemical Society > 2011 > 133 > 11 > 3704 - 3707

article

Polyvinylbutyral assisted synthesis and characterization of chalcopyrite quaternary semiconductor Cu(InxGa1−x)Se2 nanofibers by electrospinning route

Lin-Jer Chen, Jiunn-Der Liao, Yu-Ju Chuang, Yaw-Shyan Fu

Polymer > 2011 > 52 > 1 > 116-121

Chalcopyrite quaternary semiconductor Cu (In _x Ga _1−x ) Se ₂ nanocrystals were successfully prepared via a relatively simple electrospinning route and characterized using X-ray powder diffraction (XRD), scanning electron microscopy (SEM), thermogravimetric analysis (TGA) and transmission electron microscopy (TEM). Semiconductor Cu(In _x Ga _1−x )Se ₂ nanofibers...

article

Characterization of crystalline silica nanorods synthesized via a solvothermal route using polyvinylbutyral as a template

Lin-Jer Chen, Jiunn-Der Liao, Yu-Ju Chuang, Yaw-Shyan Fu

Journal of Nanoparticle Research > 2011 > 13 > 2 > 783-790

The preparation of crystalline silica nanorods is presented. Crystalline silica nanorods were synthesized via a simple solvothermal route using polyvinylbutyral (PVB) as a template in an autoclave with ethylenediamine as a solvent at 180 °C for 25 h. Silica nanorods with diameters in the range of 50–80 nm were obtained. The solvothermal route with a PVB template played affected the crystallization...

article

Synthesis and characterization of PVB/silica nanofibers by electrospinning process

Lin-Jer Chen, Jiunn-Der Liao, Shih-Jen Lin, Yu-Ju Chuang, more

Polymer > 2009 > 50 > 15 > 3516-3521

This paper describes PVB/silica nanofibers which were fabricated by electrospinning. Although electrospinning has developed rapidly over the past few years, electrospinning nanofibers are still at a premature research stage which is a process by which polymer nanofibers can be formed when a droplet of viscoelastic polymer solution is subjected to high voltage electrostatic field. PVB/silica nanofibers...

article

Fabrication of LiNi0.5+δMn0.5−δO2 nanofibers by electrospinning

Jui-Chin Kuo, Shih-Chin Lee, Kuo-Chin Hsu, Shyh-Jiun Liu, more

Materials Letters > 2008 > 62 > 30 > 4594-4596

Polycrystalline tetranary LiNi _0.5+δ Mn _0.5−δ O ₂ nanofibers have been successfully fabricated by a sol–gel assisted electrospinning technique. The structures and properties of fabricated nanofibers were characterized by scanning electron microscopy (SEM), X-ray powder diffraction (XRD), transmission electron microscopy (TEM) and thermal gravimetric analysis (TGA). After heat...

article

Preparation and characterization of CuInSe2 nano-particles

Wei-Lun Lu, Yaw-Shyan Fu, Bae-Heng Tseng

Journal of Physics and Chemistry of Solids > 2008 > 69 > 2-3 > 637-640

We had demonstrated that the morphology and particle size of CuInSe ₂ synthesized by a modified solvothermal route could be altered considerably by controlling the reaction temperature, reaction time and washing agents. The particle shape was spherical when deionized water was used as washing agent. Particles with the size down to 15nm were obtained. When the washing agent changed to ethanol,...

article

Surface free energy of non-stick coatings deposited using closed field unbalanced magnetron sputter ion plating

Chen-Cheng Sun, Shih-Chin Lee, Shyue-Bin Dai, Shein-Long Tien, more

Applied Surface Science > 2007 > 253 > 8 > 4094-4098

Semiconductor IC packaging molding dies require wear resistance, corrosion resistance and non-sticking (with a low surface free energy). The molding releasing capability and performance are directly associated with the surface free energy between the coating and product material. The serious sticking problem reduces productivity and reliability. Depositing TiN, TiMoS, ZrN, CrC, CrN, NiCr, NiCrN, CrTiAlN...

article

Surface free energy of CrNx films deposited using closed field unbalanced magnetron sputtering

Chen-Cheng Sun, Shih-Chin Lee, Shyue-Bin Dai, Yaw-Shyan Fu, more

Applied Surface Science > 2006 > 252 > 23 > 8295-8300

CrN _x thin films have attracted much attention for semiconductor IC packaging molding dies and forming tools due to their excellent hardness, thermal stability and non-sticking properties (low surface free energy). However, few data has been published on the surface free energy (SFE) of CrN _x films at temperatures in the range 20–170°C. In this study CrN _x thin films with CrN,...

article

Synthesis, Characterization, and Highly Efficient Catalytic Reactivity of Suspended Palladium Nanoparticles

Chang-Bing Hwang, Yaw-Shyan Fu, Yi-Ling Lu, Shu-Wen Jang, more

Journal of Catalysis > 2000 > 195 > 2 > 336-341

The catalytic activities of suspended nano-sized palladium catalysts toward various olefin hydrogenation reactions are reported. The Pd nanoparticles were prepared by a laser ablation method followed by careful characterization. Two types of Pd nanoparticle systems were fabricated and subjected to a series of catalytic activity measurements: (i) Pd nanoparticles stabilized by tetraoctylammonium bromide...

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