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Investigation of post-thermal annealing-induced enhancement in photovoltaic performance for squaraine-based organic solar cells

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Frontiers of Materials Science 2020年第1期14卷 81-88页

作者： Rui Zhu Feiyang Liu Zixing Wang Bin Wei Guo Chen Key Laboratory of Advanced Display and System Applications(Ministry of Education) Shanghai UniversityYanchang Road 149Shanghai200072China School of Environmental and Chemical Engineering Jiangsu University of Science and TechnologyZhenjiang212003China

In this work,we have systematically investigated the post-thermal annealing-induced enhancement in photovoltaic performance of a 2,4-bis[4-(N,N-diisobutylamino)-2,6-dihydroxyphenyl]squaraine(DIBSQ)/C60 planar heterojunction(PHJ)organic solar cells(OSCs).An increased power conversion efficiency(PCE)of 3.28%has been realized from a DIBSQ/C60 device with thermal annealing at 100°C for 4 min,which is about 33%enhancement compared with that of the as-cast *** improvement of the device performance may be mainly ascribed to the crystallinity of the DIBSQ film with post-thermal annealing,which will change the DIBSQ donor and C60 acceptor interface from^PHJ to hybrid planar-mixed *** new donor-acceptor heterojunction structure will significantly improve the charge separation and charge collection efficiency,as well as the open circuit voltage(Voc)of the device,leading to an enhanced *** work provides an effective strategy to improve the photovoltaic performance of SQ-based OSCs.

关键词： organic solar cell squaraine dye post-thermal annealing donor/acceptor interface power conversion efficiency

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Highly Efficient Light-emitting Devices Based on Quantum dots/Perovskites

Highly Efficient Light-emitting Devices Based on Quantum dot...

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International Conference on display Technology, ICDT 2022

作者： Wang, Lin Kong, Lingmei Yang, Xuyong Key Laboratory of Advanced Display and System Applications of Ministry of Education Shanghai University 149 Yanchang Road 200072 China

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Solution-processed inorganic charge transport layers for efficient and stable quantum-dot LEDs

Solution-processed inorganic charge transport layers for eff...

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International Conference on display Technology, ICDT 2019

作者： Yang, Xuyong Cao, Fan Wang, Haoran Shen, Piaoyang Key Laboratory of Advanced Display and System Applications of Ministry of Education Shanghai University 149 Yanchang Road 20007 China

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High color-purity light-emitting diodes based on quantum dots/perovskites

High color-purity light-emitting diodes based on quantum dot...

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International Conference on display Technology, ICDT 2021

作者： Wang, Lin Yang, Xuyong Key Laboratory of Advanced Display and System Applications of Ministry of Education Shanghai University 149 Yanchang Road 200072 China

Colloidal quantum dots/perovskites based light-emitting diodes (QLEDs/PeLEDs) have attracted extensive attention for lighting and display applications because of their excellent advantages, such as narrow emission bandwidth, color tunability, high brightness and low-cost fabrication techniques. The external quantum efficiencies (EQEs) for QLEDs/PeLEDs are catching up with those for commercial organic light-emitting diodes (OLEDs), thanks to the quantum efficiency improvement, the device configuration optimization as well as the deep understanding of electroluminescence principle. Despite the rapid advance in device performance has been achieved, the operational lifetime of these devices still cannot meet the requirements for practical applications. In this report, we will present our latest advances in improving performance and stability of high color-purity QLEDs/PeLEDs. © 2021, John Wiley and Sons Inc. All rights reserved.

关键词： Semiconductor quantum dots

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Broadband absorption performance of 3D-printed polyetheretherketone-based electromagnetic wave-absorbing composites

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Chinese Journal of Aeronautics 2024年第8期37卷 547-558页

作者： Lin BAI Nan CHANG Meiying ZHAO Chi HOU Yi CAO Dichen LI School of Aeronautics Northwestern Polytechnical UniversityXi’an 710072China Chengdu Aircraft Design and Research Institute Chengdu 610091China Xi’an Key Laboratory of Advanced Structure Design and Application of Aircraft Northwestern Polytechnical UniversityXi’an 710072China State Key Laboratory for Manufacturing System Engineering Xi’an Jiaotong UniversityXi’an 710054China

The rapid development of additive manufacturing technology has offered a new avenue for designing and fabricating high wave-absorbing meta *** this study,the mechanical properties and broadband absorption performance of Poly-Ether-Ether-Ketone(PEEK)–based electromagnetic wave–absorbing composite materials was *** high-performance polymer PEEK was used as the matrix,and the materials with electromagnetic wave loss,such as reduced graphene oxide,Carbonyl Iron(CI),and Flake CI(FCI),were used as *** on the theory of impedance matching,a wave-absorbing structure with a gradual impedance gradient was designed and *** test results showed that at the 2.0–18.0 GHz frequency band,the coverage rate of the effective absorption bandwidth was up to 72.0%,the average optimal reflectivity was–18.09 dB,and the wide-angle absorption range was 0°–30°.The advantages of additive manufacturing technology in designing and fabricating wave-absorbing structures are presented,demonstrating that the technology is an effective method for creating broadband absorbing structures.

关键词： Absorption performance Additive manufacturing Electromagnetic absorption PEEK composite materials Gradual structure Broadband absorption

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systematic studies on scan and driving model for flat panel display

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Journal of Shanghai University(English Edition) 2011年第4期15卷 279-286页

作者：徐美华冉峰陈章进翁世浩 School of Mechatronics Engineering and Automation Shanghai University Key Laboratory of Advanced Display and System Application (Shanghai University) Ministry of EducationShanghai 200072P.R.China Micro-electronic Research and Development Center Shanghai University

Aiming at the time redundancy in the fiat panel display （FPD） imaging process, the paper studied some problems for FPD gray scale controlling based on the fraetal theory, dissertates the construction of the space-time mapping topology architecture, the proposition of optimal scanning structure for FPD＇s gray imaging, and the creation of the fractal theoretic model. Then the logic implementation and system application are presented based on the fraetal model of the optimal scan architecture, and the application results achieved target of eliminating time redundancy and increasing the scanning availability. The novel control mode that the fractal scanning IP core described with Verilog language embedded in the FPGA hardware frame can efficiently increase the imaging gray scales and quality in the FPDs scanning controller and speed up the frame frequency of display system.

关键词： fiat panel display （FPD） space-time mapping optimal scan architecture fractal model logic implementation IP core

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Hole transporting material 5,10,15-tribenzyl-5Hdiindolo[3,2-a:3',2'-c]-carbazole for efficient optoelectronic applications as an active layer

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Chinese Physics B 2015年第2期24卷 428-431页

作者：郑燕琼 William J.Potscavage Jr 张建华魏斌黄荣娟 Key Laboratory of Advanced Display and System Applications Ministry of EducationShanghai University Center for Organic Photonics and Electronics Research(OPERA) and International Institute for Carbon Neutral Energy Research(WPI-I2CNER) Kyushu University

In order to explore the novel application of the transparent hole-transporting material 5,10,15-tribenzyl-5Hdiindolo[3,2-a：3＇,2＇-c]-carbazole（TBDI）,in this article TBDI is used as an active layer but not a buffer layer in a photodetector（PD）,organic light-emitting diode（OLED）,and organic photovoltaic cell（OPV） for the first ***,the absorption and emission spectra of a blend layer comprised of TBDI and electron-transporting material bis-（2-methyl-8-quinolinate） 4-phenylphenolate（BAlq） are *** on the absorption properties,an organic PD with a peak absorption at 320 nm is fabricated,and a relatively-high detectivity of 2.44×10^（11） cm· Hz^（1/2）/W under 320-nm illumination is *** TBDI/tris（8-hydroxyquinoline） aluminum（Alq_3） OLED device exhibits a comparable external quantum efficiency and current efficiency to a traditional 4,4-bis[N-（l-naphthyl）-N-phenyl-amino]biphenyl（α-NPD）/Alq_3 OLED.A C_（70）-based Schottky junction with 5 wt%-TBDI yields a power conversion efficiency of 5.0%,which is much higher than 1.7%for an α-NPD-based junction in the same *** results suggest that TBDI has some promising properties which are in favor of the hole-transporting in Schottky junctions with a low-concentration donor.

关键词： 5 10 15-tribenzyl-5H-diindolo[3 2-a：3＇ 2＇-c]-carbazole photodetector organic light-emitting diode Schottky junction

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A blue organic light emitting diodes with graded junction for hole injection and a step barrier for electron injection

A blue organic light emitting diodes with graded junction fo...

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作者： Jiang, Xue-Yin Zhang, Zhi-Lin Zhu, Wen-Qing Xu, Shao-Hong Department of Materials Science Shanghai University Jiading Shanghai 201800 China Key Laboratory of Advanced Display and System Application Ministry of Education Shanghai University Shanghai 200072 China

ISBN: (纸本)9787561752289

Compared to the conventional hetero-junction OLED (Cell-HJ), a blue OLED with a graded junction in the interface between hole transporting layer (HTL) and emitted layer (EML) exhibited low drive voltage and significantly improved stability, however loss of efficiency. In order to redeem the decrease in efficiency, a step barrier for electron injection was proposed. The device with a graded junction in side of anode and a step barrier in the side of cathode showed high stability and improved efficiency. By studying Hole-only devices with graded junction and hetero-junction, electron-only cell with a step barrier, the enhancement of stability and improvement of efficiency have been explained.

关键词： Electron injection

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Improved performance of polymer solar cells by using inorganic, organic, and doped cathode buffer layers

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Chinese Physics B 2016年第3期25卷 428-433页

作者：王桃红陈长博郭坤平陈果徐韬魏斌 School of Materials Science and Engineering Shanghai University Shanghai 200072 China Key Laboratory of Advanced Display and System Applications Ministry of Education Shanghai University Shanghai 200072 China Sino-European School of Technology Shanghai University Shanghai 200444 China

The interface between the active layer and the electrode is one of the most critical factors that could affect the device performance of polymer solar cells. In this work, based on the typical poly（3-hexylthiophene）：[6,6]-phenyl C61-butyric acid methyl ester （P3HT：PCBM） polymer solar cell, we studied the effect of the cathode buffer layer （CBL） between the top metal electrode and the active layer on the device performance. Several inorganic and organic materials commonly used as the electron injection layer in an organic light-emitting diode （OLED） were employed as the CBL in the P3HT：PCBM polymer solar cells. Our results demonstrate that the inorganic and organic materials like Cs2CO3, bathophenanthroline （Bphen）, and 8-hydroxyquinolatolithium （Liq） can be used as CBL to efficiently improve the device performance of the P3HT：PCBM polymer solar cells. The P3HT：PCBM devices employed various CBLs possess power conversion efficiencies （PCEs） of 3.0%-3.3%, which are ca. 50% improved compared to that of the device without CBL. Furthermore, by using the doped organic materials Bphen：Cs2CO3 and Bphen：Liq as the CBL, the PCE of the P3HT：PCBM device will be further improved to 3.5%, which is ca. 70% higher than that of the device without a CBL and ca. 10% increased compared with that of the devices with a neat inorganic or organic CBL.

关键词： polymer solar cell interface cathode buffer layer morphology

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A novel depth coding scheme for multiview video plus depth compression

A novel depth coding scheme for multiview video plus depth c...

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2010 International Conference on Audio, Language and Image Processing, ICALIP 2010

作者： Zhang, Qiuwen An, Ping Zuo, Yifan Zhang, Zhaoyang School of Communication and Information Engineering Shanghai University Shanghai China Key Laboratory of Advanced Displays and System Application Ministry of Education China

ISBN: (纸本)9781424458653

Efficient compression of multi-view images and videos is an open and interesting research issue that has been attracting the attention of both academic and industrial world during the past several years. Multiview video plus depth (MVD) is a new 3D video format that would support 3D television (3DTV) and free viewpoint television (FTV). Depth-images are a 2D representation of the 3D scene surface and for 3DTV and FTV applications the depth information of MVD data is used for rendering virtual intermediate views of the scene. In this paper, we propose a novel coding scheme that is adapted to the special characteristics of depth-images, individual coding for color and depth data: the conventional multiview coding approach (MVC) is used for color videos and multidimensional multiscale parser (MMP) algorithm for depth maps coding. Experimental results show that the presented scheme achieves significant coding gains at high rate while compared with the joint multiview video model and Platelet depth coding. ©2010 IEEE.

关键词： Video signal processing

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