We found using UV-curable polymer (NOA63 from Norland Optics) film as a passivation layer, which was very simple and convenient to perform, could provide a temporary barrier for the organic light emitting devices (OLEDs). The NOA63 protective layer significantly restricted the moisture that penetrated into the OLEDs, but did not affect its luminescent characteristics. The decay time of device reaching 70% initial luminance was 1860 min, 6.8 folds longer than that of device without encapsulation. The effective water vapor transmission rate achieved 0.031 g/m 2 /day at 20 • C and 50% relative humidity condition. © 2013 The Electrochemical Society. [DOI: 10.1149/2.007309ssl] All rights reserved. Extensive attention has been paid to organic light-emitting devices (OLEDs) due to their possible use in a wide range of display and lighting applications.1-9 However, the short lifetime is still a critical factor, which greatly limits the industrialization of OLEDs. The organic materials in the light-emitting layer are susceptible to be damaged under air. 4,5 Additionally, the electrode materials may be negatively affected by oxidation. 6,8 In that case, the evolution of "dark spots" was identified as the principal degradation mechanism. Operating OLEDs in air resulted in a vast majority of loss of electroluminescent (EL) intensity in incipient several hours.10 Therefore, there is a significant demand for techniques that are able to preserve device characteristics for air-sensitive devices during fabrication and testing. Especially for laboratory aim, such as shipping incomplete samples and testing, do not often require the extended lifetimes that commercial products demand. In this study, we reported a solution that is accessible to R&D groups to be able to preserve device characteristics during storage and shipping time. The protection layer was UV-curable polymer (NOA63 from Norland Optics) film formed by using a simple spin coating method. This method does not damage the luminescent characteristics of devices, and has no need of any vacuum or heating process and can be potential utilized for elementary encapsulation. Of the OLEDs Experiments NOA63 is a clear, colorless and liquid photopolymer that crosslinked when exposed to ultraviolet light. The solid NOA63 has excellent optical and strong mechanical properties, most commonly used as nanometer-scale contact printing and imprint lithography, 11 or a template-stripping photopolymer substrate. 12 Here, we will propose another NOA63 application as a passivation layer for OLEDs thin film encapsulation (TFE). This TFE method using generally spincoating technology to present a straightforward approach to handling air-sensitive OLEDs for laboratory storage and shipping.To investigate the influence of the NOA63 fabrication process on the Current density-Voltage-Luminance characteristics (I-V-L) of the OLEDs, glass-based small molecular OLEDs were fabricated. As shown in Fig. 1, patterned indium-tin oxide (ITO)-coated glass substrates with the sheet resistance of 10 / was clea...

Electromagnetic vibroseis is an important seismic wave excitation device. At present, the research of electromagnetic vibroseis mainly focuses on application and prototype design, lacking research on electromagnetic-mechanical coupling. Analyzing the electromagnetic-mechanical coupling and optimizing the air gap magnetic field is of great significance to improve the excitation quality of low-frequency seismic waves. In this paper, the electromagnetic-mechanical coupling is analyzed by studying the parameter force factor, and two novel optimal designs of the air gap magnetic field are proposed. Firstly, the finite element model of the air gap magnetic field is established, and the influence of the force factor distribution curve on the vibration signal is analyzed by using the Gaussian function and parameter spline difference (PSD) method. Further, an asymmetrical axial dual-magnet design is proposed to enhance the radial magnetic induction intensity Βr in the air gap. The design of adding a radial magnet to the outer yoke is proposed to compensate for the nonlinearity of the Βr in the air gap. The simulation results show that the asymmetric axial dual-magnet structure increases the Βr by 22.2% compared with the axial single-magnet structure. Adding a radial magnet to the outer yoke reduces the amplitude ratio of the third harmonic to the fundamental wave from 23.24% to 4.66%. It is necessary to consider the influence of the height of the driving coils on the maximum displacement, force factor distribution curve, and harmonic distortion.