期刊导航

Totally found 6 items.

  • [会议] Fabrication of SiNWs-FET Nanostructure Via Atomic Force Microscopy Lithography
    The unique electrical properties of silicon nanowires (SiNWs) is one of the reasons it become an attractive transducer for biosensor nowadays. Positive (holes) and negative (electron) charge carriers from SiNWs can simply interact with either positive or negative charge of sensing target. In this paper, we have studied the fabrication of silicon nanowires field effect transistor (SiNWs-FET) nanostructure patterned on 15 Ω resistivity of p-type silicon on insulator (SOI) wafer fabricated via atomic force microscopy lithography technique. To fabricate SiNWs-FET nanostructure, a conductive AFM tip, Cr/Pt cantilever tip, was used then various value of applied voltage, writing speed and relative humidity were studied. Subsequent, followed by wet etching processes, admixture of tetramethylammonium hydroxide (TMAH) and isopropyl alcohol (IPA) were used to remove the undesired of silicon layer and diluted hydrofluoric acid (HF) was used to remove the oxide layer. From the results, it shows that, cantilever tip at 9 V with 0.4 μm/s writing speed and relative humidity between 55% - 60% gives the best formation of silicon oxide to fabricate SiNWs-FET nanostructure.
    关键词: SiNWS-FET nanostructure;Atomic force microscopy lithography;Tetramethylammonium hydroxide
  • [会议] Effect of Ultrasonic Agitation and Spin Coating Speed on the Photovoltaic Properties of Inverted Organic Solar Cell Using Solution-Dispersed Copper Iodide as Anode Buffer Layer
    Previous study showed that the introduction of solution-dispersed copper iodide (Cul) as anode buffer layer has improved the performance of inverted type organic solar cell. However, the Cul preparation parameters have yet to be optimized for the inverted type organic solar cell. In this work, the effect of ultrasonic agitation of Cul solution on inverted type organic solar cell based on zinc oxide (ZnO)/poly(3-hexylthiophene) (P3HT):(6,6)-phenyl-C61-butyric acid methyl ester (PCBM) has been studied. ZnO, acting as electron transporter, was spin-coated on top of fluorine tin oxide (FTO) substrate, while the active layer consisting of P3HT:PCBM as the electron donor and electron acceptor was spin-coated onto the ZnO layer and the top electrode, silver (Ag) was then thermally evaporated. Cul dispersed in acetonitrile solution was ultrasonicated with durations of 10, 20 and 30 min and then was spin-coated on the active layer at 1000 rpm. It was found that solution-dispersed Cul with longer ultrasonic agitation duration attained a relatively higher power conversion efficiency (PCE) than that with shorter duration. The highest PCE of 2.13% was achieved at 30 min ultrasonic agitation due to good film surface morphology as can be seen from field emission scanning electron microscope (FESEM) results. For further optimization, the deposition of Cul was carried out using different spin coating speeds of 1000 and 3000 rpm. The optimum PCE obtained was 2.29% at a spin coating speed of 3000 rpm as a result of uniform layer of Cul.
    关键词: Solution-dispersed;Copper iodide;Anode buffer layer;Organic solar cell
  • [会议] The Effect of Needle Diameter on Optical Properties and Morphological Structure of La203-PVA Phosphor Nanofibers Prepared by Electrospinning Method
    Lanthanum Oxide-Polyvinyl alcohol (La_2O_3-PVA) phosphor nanofibers were prepared by electrospinning and investigation of the effect of needle diameter on the optical properties and morphological structure at the nanofibers was carried out. The average diameter of phosphor nanofibers have been evaluated for five different needle diameters. The resulting phosphor nanofibers were observed and analyzed by X-ray diffraction (XRD), Field Emission Scanning Electron Microscope (FESEM), Ultraviolet-visible Spectroscopy (UV-Vis) and HPC-2 Lightsource Colorimeter. The La_2O_3-PVA phosphor nanofibers were used in light down-conversion of UV light (365 nm) for the white light-emitting diode (WLED) application. The chromaticity coordinates (CIE) and correlated color temperature (CCT) were measured for different phosphor nanofibers with different sizes of needle diameter (0.45,0.55,0.65,0.75,1.1) mm. The results revealed that the phosphor nanofibers formed by needle diameter of 0.65 mm places macromolecule in a better order and the average diameter increase from 40.08 nm to 87.27 nm after annealing followed by increasing in atomic percentage of lanthanum. The energy gap of chosen phosphor nanofibers is 3.5365 eV. An optimum color rendering index (CRI) value of 70.20 is obtained. The white phosphor exhibited CIE values of 0.3536, 0.407 and CCT of 4890 K.
    关键词: La_2O_3-PVA;Nanofibers;UV-Vis;XRD;White light
  • [会议] Effect of Ultrasonic Agitation and Spin Coating Speed on the Photovoltaic Properties of Inverted Organic Solar Cell Using Solution-Dispersed Copper Iodide as Anode Buffer Layer
    Previous study showed that the introduction of solution-dispersed copper iodide (Cul) as anode buffer layer has improved the performance of inverted type organic solar cell. However, the Cul preparation parameters have yet to be optimized for the inverted type organic solar cell. In this work, the effect of ultrasonic agitation of Cul solution on inverted type organic solar cell based on zinc oxide (ZnO)/poly(3-hexylthiophene) (P3HT):(6,6)-phenyl-C61-butyric acid methyl ester (PCBM) has been studied. ZnO, acting as electron transporter, was spin-coated on top of fluorine tin oxide (FTO) substrate, while the active layer consisting of P3HT:PCBM as the electron donor and electron acceptor was spin-coated onto the ZnO layer and the top electrode, silver (Ag) was then thermally evaporated. Cul dispersed in acetonitrile solution was ultrasonicated with durations of 10, 20 and 30 min and then was spin-coated on the active layer at 1000 rpm. It was found that solution-dispersed Cul with longer ultrasonic agitation duration attained a relatively higher power conversion efficiency (PCE) than that with shorter duration. The highest PCE of 2.13% was achieved at 30 min ultrasonic agitation due to good film surface morphology as can be seen from field emission scanning electron microscope (FESEM) results. For further optimization, the deposition of Cul was carried out using different spin coating speeds of 1000 and 3000 rpm. The optimum PCE obtained was 2.29% at a spin coating speed of 3000 rpm as a result of uniform layer of Cul.
    关键词: Solution-dispersed;Copper iodide;Anode buffer layer;Organic solar cell
  • [会议] Fabrication of SiNWs-FET Nanostructure Via Atomic Force Microscopy Lithography
    The unique electrical properties of silicon nanowires (SiNWs) is one of the reasons it become an attractive transducer for biosensor nowadays. Positive (holes) and negative (electron) charge carriers from SiNWs can simply interact with either positive or negative charge of sensing target. In this paper, we have studied the fabrication of silicon nanowires field effect transistor (SiNWs-FET) nanostructure patterned on 15 Ω resistivity of p-type silicon on insulator (SOI) wafer fabricated via atomic force microscopy lithography technique. To fabricate SiNWs-FET nanostructure, a conductive AFM tip, Cr/Pt cantilever tip, was used then various value of applied voltage, writing speed and relative humidity were studied. Subsequent, followed by wet etching processes, admixture of tetramethylammonium hydroxide (TMAH) and isopropyl alcohol (IPA) were used to remove the undesired of silicon layer and diluted hydrofluoric acid (HF) was used to remove the oxide layer. From the results, it shows that, cantilever tip at 9 V with 0.4 μm/s writing speed and relative humidity between 55% - 60% gives the best formation of silicon oxide to fabricate SiNWs-FET nanostructure.
    关键词: SiNWS-FET nanostructure;Atomic force microscopy lithography;Tetramethylammonium hydroxide
  • [会议] The Effect of Needle Diameter on Optical Properties and Morphological Structure of La203-PVA Phosphor Nanofibers Prepared by Electrospinning Method
    Lanthanum Oxide-Polyvinyl alcohol (La_2O_3-PVA) phosphor nanofibers were prepared by electrospinning and investigation of the effect of needle diameter on the optical properties and morphological structure at the nanofibers was carried out. The average diameter of phosphor nanofibers have been evaluated for five different needle diameters. The resulting phosphor nanofibers were observed and analyzed by X-ray diffraction (XRD), Field Emission Scanning Electron Microscope (FESEM), Ultraviolet-visible Spectroscopy (UV-Vis) and HPC-2 Lightsource Colorimeter. The La_2O_3-PVA phosphor nanofibers were used in light down-conversion of UV light (365 nm) for the white light-emitting diode (WLED) application. The chromaticity coordinates (CIE) and correlated color temperature (CCT) were measured for different phosphor nanofibers with different sizes of needle diameter (0.45,0.55,0.65,0.75,1.1) mm. The results revealed that the phosphor nanofibers formed by needle diameter of 0.65 mm places macromolecule in a better order and the average diameter increase from 40.08 nm to 87.27 nm after annealing followed by increasing in atomic percentage of lanthanum. The energy gap of chosen phosphor nanofibers is 3.5365 eV. An optimum color rendering index (CRI) value of 70.20 is obtained. The white phosphor exhibited CIE values of 0.3536, 0.407 and CCT of 4890 K.
    关键词: La_2O_3-PVA;Nanofibers;UV-Vis;XRD;White light
意见反馈
返回顶部