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Non-fullerene small molecule electron acceptors for high-performance organic solar cells

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Journal of Energy Chemistry 2018年第4期27卷 990-1016页

作者： Hao Lin Qiang Wang Key laboratory of Applied Surface and Colloid Chemistry National Ministry of Education Shaanxi Key Laboratory for Advanced Energy Devices Shaanxi Engineering Lab for Advanced Energy Technology School of Materials Science and Engineering Shaanxi Normal University

Fullerenes and their derivatives are important types of electron acceptor materials and play a vital role in organic solar cell devices. However, the fullerene acceptor material has some difficulties to overcome the intrinsic shortcomings, such as weak absorption in the visible range, difficulty in modification and high cost, which limit the performance of the device and the large-scale application of this type of acceptors. In recent years, non-fullerene electron acceptor material has attracted the attention of scientists due to the advantages of adjustable energy level, wide absorption, simple synthesis, low processing cost and good solubility. Researchers can use the rich chemical means to design and synthesize organic small molecules and their oligomers with specific aggregation morphology and excellent optoelectronic prop- erties. Great advances in the field of synthesis, device engineering, and device physics of non-fullerene acceptors have been achieved in the last few years. At present, non-fullerene small molecules based photovoltaic devices achieve the highest efficiency more than 13% and the efficiency gap between fullerenetype and non-fullerene-type photovoltaic devices is gradually narrowing. In this review, we explore recent progress of non-fullerene small molecule electron acceptors that have been developed and led to highefficiency photovoltaic devices and put forward the prospect of development in the future.

关键词： Organic solar cells Non-fullerene Electron acceptors Bulk heterojunction

Li-ion batteries: Phase transition

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Chinese Physics B 2016年第1期25卷 16-26页

作者：侯配玉褚赓高健张彦涛张联齐 Tianjin Key laboratory for Photoelectric Materials and devices School of Materials Science and EngineeringTianjin University of Technology Beijing national laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences

Progress in the research on phase transitions during Li＋ extraction/insertion processes in typical battery materials is summarized as examples to illustrate the significance of understanding phase transition phenomena in Li-ion batteries. Physical phenomena such as phase transitions （and resultant phase diagrams） are often observed in Li-ion battery research and already play an important role in promoting Li-ion battery technology. For example, the phase transitions during Li＋ insertion/extraction are highly relevant to the thermodynamics and kinetics of Li-ion batteries, and even physical characteristics such as specific energy, power density, volume variation, and safety-related properties.

关键词： Li-ion batteries phase transition phase diagram electrodes

Regulatory perspectives of combination products

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Bioactive Materials 2022年第4期7卷 492-503页

作者： Jiaxin Tian Xu Song Yongqing Wang Maobo Cheng Shuang Lu Wei Xu Guobiao Gao Lei Sun Zhonglan Tang Minghui Wang Xingdong Zhang Center for medical Device Evaluation National Medical Products AdministrationBeijingChina NMPA Key laboratory for Quality Research and Control of Tissue Regenerative Biomaterial&Institute of Regulatory Science for medical devices&NMPA Research Base of Regulatory Science for medical devices Sichuan UniversityChengduChina national engineering Research Center for Biomaterials&College of Biomedical engineering Sichuan UniversityChengduChina Center for Drug Evaluation National Medical Products AdministrationBeijingChina

Combination products with a wide range of clinical applications represent a unique class of medical products that are composed of more than a singular medical device or drug/biological *** product research and development,clinical translation as well as regulatory evaluation of combination products are complex and *** review firstly introduced the origin,definition and designation of combination *** areas of systematic regulatory review on the safety and efficacy of device-led/supervised combination products were then *** and clinical evaluation of combination products was ***,the research prospect of regulatory science for combination products was *** tools of computational modeling and simulation,novel technologies such as artificial intelligence,needs of developing new standards,evidence-based research methods,new approaches including the designation of innovative or breakthrough medical products have been developed and could be used to assess the safety,efficacy,quality and performance of combination *** together,the fast development of combination products with great potentials in healthcare provides new opportunities for the advancement of regulatory review as well as regulatory science.

关键词： Combination products Definition Designation Safety and efficacy Regulatory science

An autobias control system for the electro optic modulator used in a quantum key distribution system

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Chinese Physics B 2014年第8期23卷 261-268页

作者：陈文芬魏正军郭莉侯丽燕王赓王金东张智明郭建平刘颂豪 laboratory of Nanophotonic Functional Materials and devices (SIPSE) and laboratory of Quantum engineering and Quantum Materials South China Normal University

In a quantum key distribution system, it is crucial to keep the extinction ratio of the coherent pulses stable. This means that the direct current bias point of the electro-optic modulator （EOM） used for generating coherent pulses must be locked. In this paper, an autobias control system based on a lock-in-amplifier for the EOM is introduced. Its drift information extracting theory and control method are analyzed comprehensively. The long term drift of the extinction ratio of the coherent pulses is measured by a single photon detector, which indicates that the autobias control system is effective for stabilizing the bias point of the EOM.

关键词： quantum key distribution electro-optic modulator autobias control lock-in-amplifier

Influence of electron–phonon interaction on the properties of transport through double quantum dot with ferromagnetic leads

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Chinese Physics B 2014年第10期23卷 447-457页

作者：罗侃王发强梁瑞生任珍珍 laboratory of Nanophotonic Functional Materials and devices (SIPSE) and Laboratory of Quantum Engineering and Quantum MaterialsSouth China Normal University

Electronic transport through a vibrating double quantum dot （DQD） in contact with noncollinear ferromagnetic （FM） leads is investigated. The state transition between the two dots of the DQD is excited by an AC microwave driving field. The corresponding currents and differential conductance are calculated in the Coulomb blockade regime by means of the Born-Markov master equation. It is shown that the interplay between electrons and phonons gives rise to phonon-assisted tunneling resonances and Franck-Condon blockade under certain conditions. In noncollinear magnetic configurations, spin-blockade effects are also observed, and the angle of polarization has some influence on the transport characteristics.

关键词： electron-phonon spin-polarized transport negative differential conductance

Synthesized few-layers hexagonal boron nitride nanosheets

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Chinese Physics B 2018年第1期27卷 424-429页

作者：莫兆军郝志红平晓杰孔丽娜杨慧程佳林张君凯金永昊李岚 School of Material Science and engineering National Demonstration Center for Experimental Function Materials EducationKey Laboratory of Display Materials and Photoelectric Devices of Ministry of Education of Ministry of EducationKey Laboratory for Optoelectronic Materials and Devices of Tianjin Tianjin University of Technology Tianjin Vocational Institute

The hexagonal boron nitrides （BNs） with different morphologies are synthesized on a large scale by a simple route using a two-step synthetic process. The morphology of h-BN can be easily controlled by changing the heat-treatment atmosphere. The whiskers with 0.5-10 μm in diameter and 50-100 μm in length consist of few-layers nanosheets in the NH3 gas. The BN nanosheets can be dissociated from the whiskers by ultrasonic treatment, which are less than 5 nm in thickness and even only two layers thick. The concentration and activity of N play an important rule, and abundant N and higher activity are conducive for refining grain in reaction. The H3BO3 and C3N6H6 molecules form a layer-like morphology with the interlinked planar triangle by a hydrogen-bonded structure.

关键词： boron nitride few layers nanosheets

Improving efficiency of organic light-emitting devices by optimizing the LiF interlayer in the hole transport layer

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Chinese Physics B 2011年第10期20卷 426-429页

作者：焦志强吴晓明华玉林董木森苏跃举申利莹印寿根 School of Materials Science and engineering Tianjin University of Technology Key laboratory of Display Materials and Photoelectric devices Ministry of Education Tianjin Key laboratory for Photoelectric Materials and devices

The efficiency of organic light-emitting devices （OLEDs） based on N,N＇-bis（1-naphthyl）-N,N＇-diphenyl-N,1＇- biphenyl-4,4＇-diamine （NPB）（the hole transport layer） and tris（8-hydroxyquinoline） aluminum （Alq3）（both emission and electron transport layers） is improved remarkably by inserting a LiF interlayer into the hole transport layer. This thin LiF interlayer can effectively influence electrical performance and significantly improve the current efficiency of the device. A device with an optimum LiF layer thickness at the optimum position in NPB exhibits a maximum current efficiency of 5.96 cd/A at 215.79 mA/cm2, which is about 86% higher than that of an ordinary device （without a LiF interlayer, 3.2 cd/A）. An explanation can be put forward that LiF in the NPB layer can block holes and balance the recombination of holes and electrons. The results may provide some valuable references for improving OLED current efficiency.

关键词： organic light-emitting devices LiF interlayer efficiency

基于铜网栅的高性能可见-红外宽波段透明导电材料及在透明电磁屏蔽与加热领域的应用（英文）

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Science China Materials 2025年

作者：李腾飞陈小连徐兆华聂书红徐文亚袁伟徐速张硕裴芳芳苏文明崔铮 School of Nano-Tech and Nano-Bionics University of Science and Technology of China Printable Electronics Research Center Nano-Devices and Materials Division Suzhou Institute of Nano-Tech and Nano-Bionics Chinese Academy of Sciences State Key laboratory of Integrated Optoelectronics College of Electronic Science and Engineering Jilin University

目前,用于光电器件和智能窗的可见光透明导电材料已经取得了快速发展.然而,在红外波段,由于透光率和导电性之间的相互制约,可见-红外宽波段透明导电材料的发展受到了限制.为此,本研究提出了一种无损伤的间接转移技术,将剥离后的独立铜...

目前,用于光电器件和智能窗的可见光透明导电材料已经取得了快速发展.然而,在红外波段,由于透光率和导电性之间的相互制约,可见-红外宽波段透明导电材料的发展受到了限制.为此,本研究提出了一种无损伤的间接转移技术,将剥离后的独立铜网栅通过聚合物键合技术转移至可见-红外光谱衬底表面,成功制备出高性能的可见-红外透明铜网栅导电材料.该材料在550 nm时透光率可达81%,在10μm时透光率为65%,同时方阻低至0.06Ω/,有效解决了可见-红外波段中高透光率与高导电性难以兼得的难题.此外,所开发的键合策略赋予该材料优异的附着力和环境可靠性.凭借其出色的性能,铜网栅透明导电材料被应用于透明电加热和电磁屏蔽领域,并表现出优异的效果.在8.2和12.4 GHz频段下,其屏蔽效能分别达到44.7和36.6 dB,是目前报道的可见-红外透明屏蔽材料中性能最佳的材料.这使其在夜视仪光电探测光学窗口的除霜除雾和电磁屏蔽应用中展现出广阔的应用前景.

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Effect of NaCl doped into Bphen layer on the performance of tandem organic light-emitting diodes

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Chinese Physics B 2014年第8期23卷 564-567页

作者：肖志慧吴晓明华玉林毕文涛王丽张欣辛利文印寿根 School of Materials Science and engineering Tianjin University of Technology Key laboratory of Display Materials and Photoelectric devices Ministry of Education Tianjin Key laboratory of Photoelectric Materials and devices

To improve the performance of tandem organic light-emitting diodes （OLEDs）, we study the novel NaCl as n-type dopant in Bphen：NaCl layer. By analyzing their relevant energy levels and cartier transporting characteristics, we discuss the mechanisms of the effective charge generation layer （CGL） of Bphen：NaCl （6 wt%）/MoO3. In addition, we use the Bphen：NaC1 （20 wt%） layer as the electron injection layer （ELL） combining the CGL to further improve the performance of tandem device. For this tandem device, the maximal current efficiency of 9.32 cd/A and the maximal power efficiency of 1.93 lm/W are obtained, which are enhanced approximately by 2.1 and 1.1 times compared with those of the single- emissive-unit device respectively. We attribute this improvement to the increase of electron injection ability by introducing of Bphen：NaCl layer. Moreover, the CGL is almost completely transparent in the visible light region, which is also important to achieve an efficient tandem OLEDs.

关键词： tandem OLEDs NaCl doping charge generation layer