Browsing by Issue Date, starting with "2017-05-02"

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High Performance and Low power Monolithic Three-Dimensional Sub-50 nm Poly Si Thin film transistor (TFTs) Circuits
(2017-05-02)
Wu, Tsung-Ta
;
Huang, Wen-Hsien
;
Yang, Chih-Chao
;
Chen, Hung-Chun
;
Hsieh, Tung-Ying
Development of manufacture trend for TFTs technologies has focused on improving electrical properties of films with the cost reduction to achieve commercialization. To achieve this goal, high-performance sub-50 nm TFTs-based MOSFETs with ON-current (I-on)/subthreshold swing (S.S.) of 181 mu A/mu m/107 mV/dec and 188 mu A/mu m/98 mV/dec for NMOSFETs and PMOSFETs in a monolithic 3D circuit were demonstrated by a low power with low thermal budget process. In addition, a stackable static random access memory (SRAM) integrated with TFTs-based MOSFET with static noise margins (SNM) equals to 390 mV at V-DD = 1.0 V was demonstrated. Overall processes include a low thermal budget via ultra-flat and ultra-thin poly-Si channels by solid state laser crystallization process, chemical-mechanical polishing (CMP) planarization, plasma-enhanced atomic layer deposition (ALD) gate stacking layers and infrared laser activation with a low thermal budget. Detailed material and electrical properties were investigated. The advanced 3D architecture with closely spaced inter-layer dielectrics (ILD) enables high-performance stackable MOSFETs and SRAM for power-saving IoT/mobile products at a low cost or flexible substrate.
Roles of 3-Ethylrhodanine in Attaining Highly Ordered Crystal Arrays of Ambipolar Diketopyrrolopyrrole Oligomers
(2017-05-03)
Wu, San-Lien
;
Huang, Yi-Fan
;
Hsieh, Chou-Ting
;
Lai, Bo-Han
;
Tseng, Po-Sen
Until now, only limited DPP oligomers delivered ambipolar semiconductor characteristics. To develop a facile strategy of preparing ambipolar mono-DPP oligomers, two dithienyl diketopyrrolopyrrole (DPPT) based-conjugated molecules, DPPT-RD and DPPT-DCV, which contain 3-ethylrhodanine (RD) and dicyano-2-vinyl (DCV) end substituents were synthesized. The influences of the -RD end substituents on the molecular properties, solid-state morphology, and OFET performances of the DPPT oligomer were investigated. The UV-vis absorption and CV results showed that the RD end substituents provide the DPPT oligomer suitable EHOMO and ELUMO for hole and electron injection from the Au source-drain electrodes. Moreover, the RD end substituents also improve the crystalline nature of the DPPT oligomer. That is, DPPT-RD can form crystal arrays with good lattice orientation, larger crystalline size, and without polymorphism. With those properties, DPPT-RD thus display ambipolar characteristic with mu(h) and mu(e) reaching 2.16 x 10(-2) and 7.27 x 10(-2) cm2 V-1 s(-1), respectively.
Fabrication of Embedded Silver Nanowires on Arbitrary Substrates with Enhanced Stability via Chemisorbed Alkanethiolate
(2017-05-03)
Liu, Gui-Shi
;
Qiu, Jing-Shen
;
Xu, Duo-Hua
;
Zhou, Xianzhong
;
Zhong, Dingyong
We propose a versatile yet practical transferring technique to fabricate a high performance and extremely stable silver nanowire (AgNW) transparent electrode on arbitrary substrates. Hydroxylated polyethylene glycol) terephthalate (PET) or poly(dimethylsiloxane) (PDMS) deposited with AgNWs was selectively decorated to lower its polar surface energy, so that the AgNWs were easily and efficiently transferred into an epoxy resin (EPR) as a freestanding film (AgNWs EPR) or onto various substrates. The AgNWs EPR capped with alkanethiolate monolayers exhibits high conductivity, low roughness, ultraflexibility, and strong corrosion resistance. Using the transferring process, AgNWs EPR was successfully constructed on rough, adhesive, flimsy, or complex curved substrates, including PET, thin optically clear adhesive, papers, a beaker, convex spherical PDMS, and leaves. A flexible touch panel enabling multitouch and a curved transparent heater on a beaker were first fabricated by using the composite film. These demonstrations suggest that the proposed technique for AgNWs is a promising strategy toward the next generation of flexible/portable/wearable electronics.
FINFET SEMICONDUCTOR DEVICE HAVING FINS WITH STRONGER STRUCTURAL STRENGTH
(2017-05-04)
Chao-Hsin CHIEN
;
Chen-Han CHOU
;
Cheng-Ting CHUNG
;
Samuel C. PAN
A semiconductor device including at least one fin disposed on a surface of a semiconductor substrate is provided. The fin includes a main portion extending along a first direction, and at least one secondary portion extending outward from the main portion along a second direction not collinear with the first direction.
Benzimidazole/Pyridoimidazole-Based Organic Sensitizers for High-Performance Dye-Sensitized Solar Cells
(2017-05-04)
Chaurasia, Sumit
;
Li, Chun-Ting
;
Desta, Mulu Berhe
;
Ni, Jen-Shyang
;
Lin, Jiann T.
A new series of benzimidazole (BIm)-based dyes (SC32 and SC33) and pyridoimidazole-(PIm) based dyes (SC35, SC36N and SC36) were synthesized as sensitizers for dye-sensitized solar cells (DSSCs). The N-substituent and C-substituent at the BIm and PIm cores were found to be the dominating factor in determining the electronic properties of the dyes and their DSSCs performance. The efficiency of BIm-based dyes (SC35 and SC36) was found to be higher than that of the PIm-based dyes (SC32 and SC33) due to better light harvesting. The C-substituents in SC36, a 4-hexylloxybenzene and a hexyl chain, are beneficial to dark current suppression, and hence SC36 achieves the best efficiency of 7.38% (approximate to 85% of N719). The two BIm dyes have better cell efficiencies than their congeners with a bithiophene entity between the BIm and the anchor due to better light harvesting of the former.
Quantum Design of pi-Electron Ring Currents in Polycyclic Aromatic Hydrocarbons: Parallel and Antiparallel Ring Currents in Naphthalene
(2017-05-04)
Mineo, Hirobumi
;
Fujimura, Yuichi
;
應用化學系分子科學碩博班
;
Institute of Molecular science
Control of pi-electrons in polycyclic aromatic hydrocarbons (PAHs) is one of the fundamental issues in optoelectronics for ultrafast optical switching devices. We have proposed an effective scenario for design of the generation of coherent ring currents in naphthalene (D-2h), which is the smallest, unit of planar PAHs. It has been demonstrated by using quantum chemical calculations and quantum optimal control (QOC) simulations that two types of ring currents, parallel and antiparallel, can be generated by resonance excitations by two linearly polarized lasers. A parallel (antiparallel) ring current means that the currents of two benzene rings run in the same (opposite) directions. The two types of ring currents may be experimentally identified by magnetic force microscopy. The QOC simulations indicate that a parallel ring current can be generated by using continuous wave and Gaussian pulse lasers with their time delay without relying on a sophisticated experimental apparatus. The present results provide a guiding principle of coherent it-electronics in PAHs for next-generation organic optical switching devices.
交大e-News第231期-交通大學、台積電攜手打造完成「台積電交大能源教育館」
(2017-05-05)
國立交通大學秘書室
;
Secretariat
Silver(I)-Catalyzed Regioselective Synthesis of Triazole Fused-1,5-Benzoxazocinones
(2017-05-05)
Barve, Indrajeet J.
;
Thikekar, Tushar Ulhas
;
Sun, Chung-Ming
;
應用化學系
;
Department of Applied Chemistry
An efficient and regioselective synthesis of novel 1,2,3-triazole-fused-1,5-benzoxazocinones through intramolecular cyclization of substituted ethynyl triazoyl benzoic acids was explored. A crucial precursor 5-iodo-1,2,3-triazole benzoate was obtained from substituted 2-azido benzoic acid esters in a single step through a Copper-Catalyzed Azide-Alkyne Cycloaddition (CuAAC) reaction using a CuI/NBS catalytic system. A carbon carbon triple bond was installed through a Sonogashira coupling reaction by various terminal alkynes. Finally, the 1,4,5-substituted ethynyl triazoyl benzoic acids were cyclized by a AgOTf-mediated intramolecular cyclization to afford 8-endo-dig 1,2,3-triazole-fused-1,5-benzoxazocinones exclusively.
Interfacial charge carrier dynamics of cuprous oxide-reduced graphene oxide (Cu2O-rGO) nanoheterostructures and their related visible-light-driven photocatalysis
(2017-05-05)
Pu, Ying-Chih
;
Chou, Hsin-Ying
;
Kuo, Wen-Shuo
;
Wei, Kung-Hwa
;
Hsu, Yung-Jung
We demonstrated a facile and green preparation of cuprous oxide-reduced graphene oxide (Cu2O-rGO) nanoheterostructures through a photochemical reaction. The density of Cu2O nanocubes (NCs) grown on the rGO surface can be well controlled by modulating the concentration of GO employed in the reaction. Because of the relatively low potential of Fermi level of rGO, the photoexcited electrons on the conduction band (CB) of Cu2O NCs preferentially transfer to rGO, simultaneously leaVing photogenerated holes on the valence band (VB) of Cu2O, resulting in the notable charge carrier separation properties. Time-resolved photoluminescence (TRPL) spectra were collected to quantitatively analyze the electron transfer rate constant (k(cet)) between Cu2O NCs and rGO, and the dependence of the k(et) on the rGO constituent in Cu2O-rGO nanoheterostructures. Among all the samples tested, the Cu2O-rGO nanoheterostructure with the rGO constituent of 2 wt.% (denoted as Cu2O-rGO-2) displayed the largest k(et) as well as the most pronounced charge separation property. The optimized Cu2O-rGO-2 showed the best methyl orange (MO) photocatalytic degradation performance, which was highly consistent with the trend of the obtained k(et) results. As compared with relevant commercial products, such as N-doped P-25 TiO2 and commercial Cu2O powders, the Cu2O-rGO-2 exhibited superior efficiency toward MO degradation under visible light illumination, illustrating its potential for applications in relevant photodlectric conversion processes. The recycling trial showed that the Cu2O-rGO has promising potential for use in the long-term course of photocatalysis to degrade organic pollutants. Furthermore, the photo catalytic efficiency evaluated under natural sunlight demonstrated that the present Cu2O-rGO nanoheterostructure could effectively harvest the energy of solar spectrum and converted it into the chemical energy for organic pollutants degradation. The current study could provide great insights into the design of semiconductor/graphene composites which exhibit remarkable charge separation properties for practical applications in the organic pollutants photodegradation, solar fuel generation as well as photovoltaic devices. (C) 2016 Elsevier B.V. All rights reserved.
Qualitative observation of reversible phase change in astrochemical ethanethiol ices using infrared spectroscopy
(2017-05-05)
Pavithraa, S.
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Methikkalam, R. R. J.
;
Gorai, P.
;
Lo, J-I
;
Das, A.
Here we report the first evidence for a reversible phase change in an ethanethiol ice prepared under astrochemical conditions. InfraRed (IR) spectroscopy was used to monitor the morphology of the ice using the S H stretching vibration, a characteristic vibration of thiol molecules. The deposited sample was able to switch between amorphous and crystalline phases repeatedly under temperature cycles between 10 K and 130 K with subsequent loss of molecules in every phase change. Such an effect is dependent upon the original thickness of the ice. Further work on quantitative analysis is to be carried out in due course whereas here we are reporting the first results obtained. (C) 2017 Elsevier B.V. All rights reserved.
Probing the conformational behavior of the doubly substituted methyl-ethyl Criegee intermediate by FTMW spectroscopy
(2017-05-07)
Cabezas, Carlos
;
Guillemin, Jean-Claude
;
Endo, Yasuki
;
應用化學系
;
Department of Applied Chemistry
Four conformers of the doubly substituted methyl-ethyl Criegee intermediate, C2H5C(CH3) OO, have been observed by Fourier-transform microwave spectroscopy. The transient species was produced using a pulsed electric discharge of a gas mixture of 2,2-diiodobutane/O-2. The conformational preferences differ from those observed previously for related alkyl-substituted Criegee intermediates. The observation of small splittings in the spectra due to the internal rotation of only one methyl group enabled us to determine the barrier heights of the hindered methyl rotation for the four conformers, which have been compared with those reported for other methyl-substituted Criegee intermediates. Published by AIP Publishing.
366天　專屬自己的花朵
(2017-05-07)
張巧宜
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Department of Communication and Technology
;
傳播與科技學系
藉由尋找366天的生日花，了解台灣擁有哪些花卉。
即時通變遷　台灣順應潮流
(2017-05-07)
郭宜婷
;
Department of Communication and Technology
;
傳播與科技學系
1996年才出現即時通訊的概念，至今過了21年已經歷過多項革新。
MOOC　教育新玩法
(2017-05-07)
朱倫君
;
Department of Communication and Technology
;
傳播與科技學系
簡介MOOC並探討其影響。
在地上飛的飛行員　陳薏先
(2017-05-07)
林孟盈
;
Department of Communication and Technology
;
傳播與科技學系
透過專訪飛機簽派員陳薏先，介紹該職業的工作內容與其重要性。
輪迴裡的真實
(2017-05-07)
洪于婷
;
Department of Communication and Technology
;
傳播與科技學系
有感於近期作家事件引發的一連串自白文，嘗試以短文創作，梳理社會事件中各個人物的位置和感受。
男孩的芭比世界　湯馬克
(2017-05-07)
陳昶安
;
陳昱彣
;
Department of Communication and Technology
;
傳播與科技學系
芭比男孩湯馬克，在自創品牌的路上，用想像力和設計力建立了屬於自己的粉紅王國。
生死愛戀或留戀　通靈少女
(2017-05-07)
李瑞彥
;
Department of Communication and Technology
;
傳播與科技學系
評論「通靈少女」，這部獨特又引人注目的電視劇。
Nanomechanical and wettability properties of Bi2Te3 thin films: Effects of post-annealing
(2017-05-07)
Jian, Sheng-Rui
;
Phuoc Huu Le
;
Luo, Chih-Wei
;
Juang, Jenh-Yih
;
電子物理學系
In this study, Bi2Te3 thin films were deposited on SiO2/Si(100) substrates by pulsed laser deposition (PLD) at 250 degrees C. The films were then annealed in-situ in the deposition chamber at various annealing temperatures (T-a) ranging from 200 to 300 degrees C. The microstructural, morphological, and nanomechanical properties of the Bi2Te3 thin films were investigated by X-ray diffraction (XRD), scanning electron microscopy, and nanoindentation techniques, respectively. The XRD results indicated that all the Bi2Te3 thin films have high crystalline quality with predominant (0015) texture. Nano-indentation measurements performed with a Berkovich nanoindenter operating under the continuous contact stiffness measurement mode revealed that both the hardness and Young's modulus of the Bi2Te3 films decreased with increasing Ta. In addition, the water contact angle measurements were carried out to delineate the effects of annealing on the changes in the surface energy and wettability of the films. Published by AIP Publishing.
沒有標籤　快樂每天
(2017-05-07)
林宥成
;
Department of Communication and Technology
;
傳播與科技學系
這社會給予人過多的標籤，這些標籤也或多或少的影響著每個人的生活。