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High-efficiency and low-voltage organic light-emitting device with a composite hole transport layer

Guangdianzi Jiguang/Journal of Optoelectronics Laser 2011年第1期22卷 34-37页

作者： Yu, Dong-Bin Lin, Hua-Ping Zhang, Xiao-Wen Zhou, Fan LI, Jun Zhang, Liang Jiang, Xue-Yin Zhang, Zhi-Lin Department of Materials Science Shanghai University Shanghai 200072 China Key Laboratory of Advanced Display and System Applications Shanghai University Shanghai 200072 China

High-efficiency and low-voltage organic light-emitting device (OLED) with a composite hole transport layer (c-HTL) of m-MTDATA doped into NPB was demonstrated. With Alq3 as the emitting and electron transport layer, the maximum luminous efficiency of OLED using c-HTL reached 5.3 cd/A which was much higher than that (3.4 cd/A) of the device with NPB as HTL. The c-HTL can improve the device efficiency by a factor of ~1.5, which is because the dopant of m-MTDATA (5 wt%) reduced the hole mobility of c-HTL and thereby promoted carrier balance. Moreover, with the incorporation of MoOx between ITO and c-HTL, the driving voltage of the device was reduced by ~1 V as a result of the reduced hole-injection barrier while the luminous efficiency was negligibly affected (5.1 cd/A). The low voltage contributed to the improved power efficiency of 4.6 lm/W (enhanced by ~30% compared with the device without MoOx layer), which was even higher in Alq3-based OLED.

关键词： Current density

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Study on the adhesion strength of new nano-structured polymer-metal composite for thermal interface material (Nano-TIM) under different pressures

Study on the adhesion strength of new nano-structured polyme...

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International Conference on (ICEPT) Electronic Packaging Technology

作者： Lei Zhang Xiuzhen Lu Xin Luo Björn Carlberg Masoud Zandira Lilei Ye Johan Liu Key Laboratory of Advanced Display and System Applications Ministry of Education & SMIT Center School of Mechatronics Engineering and Automation Shanghai University Shanghai China SMIT Center & Bionano Systems Laboratory Department of Microtechnology and Nanoscience Chalmers University of Technology Gothenburg Sweden SHT Smart High Tech AB Gothenburg Sweden

With the continual increase in cooling demand for microprocessors, the microelectronics industry has been increasingly focused on the development of thermal solutions. Thermal Interface Material (TIM) plays a key role in reducing the thermal resistance of packaging and the thermal resistance between the electronic device and the external cooling components. Nano-TIM, a new type of thermal interface material, was developed to improve the heat dissipation of electronic devices. This paper describes work undertaken to research the reliability of Nano-TIM. Pull tests were used to investigate the shear strength of samples with Nano-TIM of different thicknesses coalesced between two PCBs with Sn coating made under different pressure. Scanning Electron Microscopy (SEM) analysis techniques were used to determine the morphology of the shear fracture section after pull tests and observe the structure of the cross section of Nano-TIM coalesced between two PCBs with Sn coating.

关键词： Materials Electronic packaging thermal management Thermal resistance Metals Heating Reliability Thermal conductivity

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Low-voltage and high-stability p-type doped blue organic light-emitting diodes with bilayer hole injection layers

Low-voltage and high-stability p-type doped blue organic lig...

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8th International Vacuum Electron Sources Conference, IVESC 2010 and NANOcarbon 2010

作者： Lu, L. Yu, J.N. Long, L. Yu, F.F. Zhang, J.H. Zhang, H. Wei, B. Key Laboratory of Advanced Display and System Application Ministry of Education Shanghai University 149 Yanchang Road Shanghai 200072 China

ISBN: (纸本)9781424466429

In recent years, organic light-emitting diodes (OLEDs) for the application of flat panel displays (FPDs) have been attracting many researchers. Blue OLEDs are the potential light source to make full color FPDs by color conversion method. However, due to a large energy bandgap of blue emission materials, blue OLEDs were widely reported to have relatively low luminance efficiencies and high operation voltage, compared to the devices with low energy emission wavelength. © 2010 IEEE.

关键词： Flat panel displays

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Salient object segmentation based on graph cut

Salient object segmentation based on graph cut

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18th International Symposium on Intelligent Signal Processing and Communication systems, ISPACS 2010

作者： Shi, Ran Liu, Zhi Xue, Yinzhu School of Communication and Information Engineering Shanghai University China Key Laboratory of Advanced Display and System Application Ministry of Education China

ISBN: (纸本)9781424473717

Salient object segmentation is an important technique for many content based applications. This paper presents an unsupervised salient object segmentation method under the graph cut optimization framework. First, we exploit a kernel density estimation based saliency model to generate the saliency map, which provides the useful cues for object segmentation. Then we exploit the saliency map to adaptively define the region cost term, the boundary cost term and their balancing weight in the cost function, which is minimized using graph cut to obtain a binary segmentation of salient objects. Experimental results on a variety of images demonstrate the better segmentation performance of our approach. © 2010 IEEE.

关键词： Costs

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ASIC design of UHF RFID reader digital baseband

ASIC design of UHF RFID reader digital baseband

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2nd Asia Pacific Conference on Postgraduate Research in Microelectronics and Electronics, PrimeAsia 2010

作者： Liu, Jing Chen, Yihao Gu, Bin Zhang, Runxi Ran, Feng Lai, Zongsheng IMCS East China Normal University Shanghai 200062 China Key Laboratory of Advanced Display and System Application Shanghai University China

ISBN: (纸本)9781424467372

This paper presents the ASIC design and implementation of digital baseband system for UHF RFID reader based on EPC Global C1G2/ISO 18000-6c protocol. The digital baseband system consists of two parts: transmitter and receiver, which inculing encoding module, decoding module, channel filers, CRC chenk module, control module and a SPI module. It is described in verilog HDL in RTL level, with Design Complier for synthesizing, PT for static timing analyzing and Astro for physical design. The die is fabricated using IBM 130nm 8-layer-metal RF cmos process successfully, which size is 3 mm × 3mm, the power consumption is around 6.7mW. It can be applied in the research of single-chip UHF RFID reader.

关键词： application specific integrated circuits

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A fully integrated, highly linear SiGe BiCMOS class-AB power amplifier targeting 2.4GHz applications

A fully integrated, highly linear SiGe BiCMOS class-AB power...

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Asia Pacific Conference on Postgraduate Research in Microelectronics & Electronics (PrimeAsia)

作者： Zhang, Shulin Su, Jie Chen, Lei Tian, Liang Zhou, Jin Ruan, Ying Liu, Shengfu Zhang, Wei Hua, Lin Ran, Feng Lai, Zongsheng Institute of Microelectronics Circuit and System East China Normal University Shanghai China Key Laboratory of Advanced Display and System Application Shanghai University Shanghai China

ISBN: (纸本)9781424467372

This paper presents a 2.4GHz fully integrated power amplifier based on 0.18μm SiGe BiCMOS technology for wireless local area network applications [1]. The power amplifier shows a 1 dB compression output power of 22.19dBm at an input power of 0.135dBm. A temperature-insensitive bias circuit is used in this PA design to improve the amplifier linearity. The total fabricated die size is about 1.5mm×1.2mm. The designed PA based on SiGe BiCMOS technology demonstrates a competitive linearity performance compared with GaAs, when considering the factors of cost and process complexity.

关键词： Power amplifiers

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Frame-layer bit allocation for multi-view video coding based on frame complexity estimation

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Journal of Shanghai University(English Edition) 2010年第1期14卷 50-54页

作者：严涛安平沈礼权李振纲王贺张兆杨 School of Communication and Information Engineering Shanghai University Key Laboratory of Advanced Displays and System Application

Current multi-view video coding （MVC） reference model in joint video team （JVT） does not provide efficient rate control schemes. This paper presents a rate control algorithm for MVC by improving the quadratic rate-distortion （R-D） model. We reasonably allocate bit-rate among views based on the correlation analysisl The proposed algorithm consists of three levels to control the rate bits more accurately, of which the frame layer allocates bits according to the frame complexity and the temporal activity. Extensive experiments show that the proposed algorithm can control the bit rate efficiently.

关键词： multi-view video coding （MVC） rate control bit-allocation rate-distortion model correlation analysis frame complexity

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A 2.4GHz high efficient monolithic class E power amplifier

A 2.4GHz high efficient monolithic class E power amplifier

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Asia Pacific Conference on Postgraduate Research in Microelectronics & Electronics (PrimeAsia)

作者： Su, Jie Zhang, Shulin Chen, Lei Tian, Liang Zhou, Jin Ruan, Ying Ran, Feng Lai, Zongsheng Institute of Microelectronics Circuit and System East China Normal University Shanghai 20062 China Key Laboratory of Advanced Display and System Application ShangHai University Shanghai 20062 China

ISBN: (纸本)9781424467372

This paper presents a 2.4GHz monolithic Class E power amplifier based on Grace 0.18um SiGe BiCMOS technology. It has a two-stage structure and adopts small DC feed inductors and on-chip matching networks. Without any off-chip components, the power amplifier achieves maximum output power of 22.4dBm. and the PAE is 33% with 2V supply. After optimizing the component parameter, the input and output terminals are both well matched to baseband and antenna respectively. With EER or ET technology this switch-mode amplifier can realize linear amplification, resulting in impressive high efficient in future communication system.

关键词： Power amplifiers

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Unequal decoding power allocation for efficient video transmission

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Journal of Shanghai University(English Edition) 2010年第1期14卷 60-65页

作者：王永芳余松煜杨小康张兆杨 Key Laboratory of Advanced Display and System Application School of Communication and Information Engineering Shanghai University Institute of Image Communication and Information Processing Research Shanghai Jiao Tong University

We present an unequal decoding power allocation （UDPA） approach for minimization of the receiver power consumption subject to a given quality of service （QoS）, by exploiting data partitioning and turbo decoding. We assign unequal decoding power of forward error correction （FEC） to data partitions with different priority by jointly considering the source coding, channel coding and receiver power consumption. The proposed scheme is applied to H.264 video over additive white Gaussion noise （AWGN） channel, and achieves excellent tradeoff between video delivery quality and power consumption, and yields significant power saving compared with the conventional equal decoding power allocation （EDPA） approach in wireless video transmission.

关键词： power allocation turbo code data partition joint source and channel code

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New Permeation Rate Measurement for Thin Film Encapsulation of Organic Light Emitting Diodes

New Permeation Rate Measurement for Thin Film Encapsulation ...

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2011 12th International Conference on Electronic Packaging Technology & High Density Packaging(2011 电子封装技术与高密度封装国际会议)

作者： Hao zhang Jianhua Zhang Bin Wei Minyan Zhang Li Long Renzheng Sang Tao Feng School of Mechanical & Electronic Engineering and Automation Shanghai University Shanghai 200072 Key Laboratory of Advanced Display and System Applications Ministry of Education Shanghai Universi School of Mechanical & Electronic Engineering and Automation Shanghai University Shanghai 200072 The Linde Group Carl-von-Linde-Strasse 2585716 Unterchleissheim Germany

We have developed a new method to measure the water vapor transmission ratio (WVTR) for thin film encapsulation (TFE) of organic light emitting diodes (OLEDs). It is a nondestructive method to measure WVTR by investigating the change of photoluminescent spectra of organic material. This method can be realized easily by online test. By calibrating the evolution curve (the photoluminescent intensity versus time), we have figured out the relative water transmission which was responded by organic materials. The WVTR of TFE devices is estimated to be about 2.0×10-2gm-2day-1 in a controlled environment of 85% relative humidity (RH) at 38℃. Novel thin film encapsulation devices have also been presented.

关键词： Organic light emitting diodes Encapsulation Films Organic materials Chemical vapor deposition Substrates Equations

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