Organic light-emitting diodes (OLEDs) were fabricated with a structure of indium-tin-oxide (ITO)/polystyrene (PS): N,N’-bis-(3-naphthyl)-N,N’-biphenyl-(1,1’-biphenyl)-4,4’-diamine(NPB)/tris-(8-hydro-xyquinoline)-a...
详细信息
Organic light-emitting diodes (OLEDs) were fabricated with a structure of indium-tin-oxide (ITO)/polystyrene (PS): N,N’-bis-(3-naphthyl)-N,N’-biphenyl-(1,1’-biphenyl)-4,4’-diamine(NPB)/tris-(8-hydro-xyquinoline)-aluminum(Alq3)/Magnesium(Mg)/tris-(8-hydroxyquinoline)-aluminum(Alq3)/Mg:*** insert- ing an ultrathin Mg layer within an Alq3 layer, the electrical and luminescent properties were optimized. As a result, an optimized film thickness about 5 nm of Mg layer was obtained. By analyzing the optical and electro transporting properties of OLEDs, electron mobility and trap characteristic energy were extracted based on space charge limited conduction (SCLC) and trapped charge limited conduction (TCLC) theories
We reported a controlled architecture growth of high density and ordered polymeric nanoparticle film of poly (3, 4-ethylene dioxythiophene) (PEDOT) via Langmuir-Blodgett (LB) technique, and self-assembled performance ...
详细信息
We reported a controlled architecture growth of high density and ordered polymeric nanoparticle film of poly (3, 4-ethylene dioxythiophene) (PEDOT) via Langmuir-Blodgett (LB) technique, and self-assembled performance of PEDOT nanoparticles at air/water interface was investigated in detail. The conducting film consisting of high density and ordered nanoparticles was transferred onto ITO substrate as a hole injection layer for organic light emitting diodes (OLEDs). The results showed that, compared to conventional PEDOT film, the improved performance of OLEDs was obtained after using ordered PEDOT nanoparticle layer as hole injection layer. It also indicated that compact arrangement and well-ordered structure of conducting channel was attributed to the improvement of OLED performance, leading to the increase of charged carrier mobility in hole injection layer and the recombination rate of electrons and holes in the electroluminescent layer.
In this paper, pure PEI and PEI/Starch thin film sensors were fabricated to detect carbon dioxide (CO2). Films were characterized by ultraviolet-visible spectroscopy (UV–Vis). The quartz crystal microbalance sensors ...
详细信息
In this paper, pure PEI and PEI/Starch thin film sensors were fabricated to detect carbon dioxide (CO2). Films were characterized by ultraviolet-visible spectroscopy (UV–Vis). The quartz crystal microbalance sensors (QCM), coated with the two selected films by the spin-coating method, showed good sensitivities to CO2 gas with concentrations in the range (0.1%-0.5%) at room temperature. In addition, the dependence of temperature on the properties of sensors was studied. It was found that the polyethyleneimine (PEI)/Starch nanocomposite thin film sensor exhibited a better CO2-sensing property than that of a pure polyethyleneimine (PEI) thin film sensor.
Organic thin films based on ZnTPP and two metalloporphyrin derivatives, i.e. (2-Nitro-5, 10, 15, 20-tetraphenylporphyrinato) zinc (II) (ZnTPP-NO2) and (2, 3-Dioxo-5, 10, 15, 20-tetraphenylporphyrinato) zinc (II) (ZnTP...
详细信息
Organic thin films based on ZnTPP and two metalloporphyrin derivatives, i.e. (2-Nitro-5, 10, 15, 20-tetraphenylporphyrinato) zinc (II) (ZnTPP-NO2) and (2, 3-Dioxo-5, 10, 15, 20-tetraphenylporphyrinato) zinc (II) (ZnTPP=O) have been deposited by spin-coating and used as optical chemically interesting materials for the detection of pyridine, ethyl acetate and methanol vapors. In particular, very interesting results have been obtained by optical absorption measurements carried out in the specific region and the selectivity towards different vapor analytes, depending both on the metal ion and the peripheral substituent of the macrocycle, was found. Moreover, this paper reports the use of an idea to analyze the variation in the area integral corresponding to the typical absorption peaks in defined spectral range for each sensing layer. The three sensing materials have been arranged in a colorimetric array configuration and examples of applications for “electronic nose”, and shown good responses to single analyte.
The open-circuit voltage of organic solar cells from 605 to 858 mV based on subphthalocyanines and C 60 by adding a hole transporting layer e.g., poly (3,4-ethylenedioxy-thiophene), poly(styrenesulfonate) betwe...
详细信息
The open-circuit voltage of organic solar cells from 605 to 858 mV based on subphthalocyanines and C 60 by adding a hole transporting layer e.g., poly (3,4-ethylenedioxy-thiophene), poly(styrenesulfonate) between the anode and SubPc. Meanwhile, the fill factor and short-circuit current were also optimized resulting in a grate enhancement in power conversion efficiency from 0.65% to 1.4%. Based on the optical transfer matrix theory and resistance study at short-circuit conditions R Jsc , the influences of build-in potential, hole injecting barrier on photovoltaic properties have been discussed.
Vanadium oxide (VOX) thin films have been deposited on glass substrates with different oxygen flows (3, 3.2, and 3.6 sccm) by means of magnetron sputtering process. We found that for different oxygen flows, the...
详细信息
Vanadium oxide (VOX) thin films have been deposited on glass substrates with different oxygen flows (3, 3.2, and 3.6 sccm) by means of magnetron sputtering process. We found that for different oxygen flows, the change of the infrared transmittance can be reached as high as 57%, the transmittance contrast factor can be reached as high as 88%,and the phase transition temperature is decreased to 54 oC, it is an ideal material for application in energy-efficient windows. According to the X-ray diffraction results of the thin films, we observed that with the increase of oxygen flow, VO2 (200) diffraction peak decreases obviously.
A smart grid application in monitoring the condition of transmission line with wireless sensor networks was described in this paper. ZigBee and GPRS (General Packet Radio Service) technology were adopted in this syste...
详细信息
A smart grid application in monitoring the condition of transmission line with wireless sensor networks was described in this paper. ZigBee and GPRS (General Packet Radio Service) technology were adopted in this system to ensure normal transmission of signals, even in remote areas where there is no telecommunication service, and data could be transmitted over a long distance. In addition, the system provided warnings before the damage caused by meteorological disasters to ensure the line security.
暂无评论