检索结果-南通市图书馆

Spectral Characteristics of White Organic Light-emitting Diodes Based on Novel Phosphorescent Sensitizer

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Physics 2008年第6期21卷 510-514页

作者： Xiao-qing Tang Jun-sheng Yu Lu Li Wen Wen ya-dong jiang State Key Laboratory of Electronic Thin Films and Integrated Devices School of Optoelectronic Information University of Electronic Science and Technology of China Chengdu 610054 China

White organic light-emitting diodes were fabricated by using a novel phosphorescence bis（1,2-diphenyl-1H-benzoimidazole）iridium（acetylacetonate）[（pbi）2Ir（acac）] as sensitizer and a fluorescent dye of 4- （dicyanomethylene）-2-t-butyl-6-（1,1,7,7-tetramethyljulolidyl-9-enyl）-4H-pyran （DCJTB） codoped into a carbazole polymer of poly（N-vinylcarbazole）（PVK）. Through characterizing the UV-Vis absorption spectra, the photoluminescence spectra of （pbi）2Ir（acac） and DCJTB, and the electroluminescence spectral properties of the WOLEDs, the energy transfer mechanisms of the codoped polymer system were deduced. The results demonstrate that the luminescent spectra with different intensity of （pbi）2Ir（acac） and DCJTB were co-existent in the EL spectra of the blended system, which is ascribed to an incomplete energy transfer process in the EL process. The efficient Forster and Dexter energy transfer between the host and the guests enabled a strong yellow emission from （pbi）2Ir（acac） and DCJTB, where （pbi）2Ir（acac） plays an important role as a phosphorescent sensitizer for DCJTB. With the blue emitting-layer of N,N＇-diphenyl-N,N＇-bis（1- naphthyl）（1,1＇-biphenyl）-4,4＇-diamine, the codoped system device achieved white emission. The codoped system showed that its Commissions Internationale de 1＇Eclairage coordinates were more independent of the variation of bias voltage than those of phosphorescent doped PVK systems.

关键词： White organic light-emitting diode Phosphorescent sensitizer Spectrum analysis

Structural Variation and Its Influence on the 1/f Noise of a-Si_(1-x)Ru_x Thin Films Embedded with Nanocrystals

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics Letters 2019年第2期36卷 75-79页

作者： Chong Wang Hao Zhong Eddy Simoen Xiang-dong jiang ya-dong jiang Wei Li State Key Lab of Electronic Thin Films & Integrated Devices University of Electronic Science and Technology of China IMEC School of Optoelectronic Science and Engineering University of Electronic Science and Technology of China

The structural variation and its influence on the 1/f noise of a-Si_(1-x)Ru_x thin films are investigated by Raman spectroscopy,transmission electron microscopy, and low frequency noise measurement. The Ru atoms are introduced into the amorphous silicon thin films by rf magnetron co-sputtering. Ru2 Si nanocrystals are found in the as-deposited samples. It is shown that the 1/f noise of the films can be reduced by a slight doping with Ru atoms. Moreover, both the microstructure and the 1/f noise performance of a-Si_(1-x)Ru_x thin films could be improved through a high-temperature annealing treatment.

关键词： Structural Variation Its Influence

Design and Imaging Application of Room-Temperature Terahertz Detector with Micro-Bolometer Focal Plane Array

在线全文

学校读者我要写书评

暂无评论

Journal of Electronic Science and Technology 2016年第2期14卷 98-102页

作者： Jun Wang Jun Gou Zhi-Ming Wu ya-dong jiang School of Optoelectronic Information University of Electronic Science and Technology of China

Room-temperature terahertz （THz） detectors indicate a great potential in the imaging application because of their real-time, compact bulk, and wide spectral band responding characteristics. THz detectors with different dimensions based on a micro-bridge structure have been designed and fabricated to get optimized micro-bolometer parameters from the test results of membrane deformation. A nanostructured titanium （Ti） thin film absorber is integrated in the micro-bridge structure of the VOx micro-bolometer by a combined process of magnetron sputtering and reactive ion etching （RIE）, and its improvement of THz absorption is verified by an optical characteristics mesurement. Continuous-wave THz detection and imaging are demonstrated by using a 2.52 THz far infrared CO2 laser and a 320x240 vanadium oxide micro-bolometer focal plane array with an optimized cell structure. With this detecting system, THz imaging of metal concealed in a wiping cloth and an envelope is demonstrated, respectively.

关键词： Index Terms---Focal plane array micro-bolometer structure real-time imaging room temperatureterahertz detector

A review on Ti_(3)C_(2)T_(x)-based nanomaterials:synthesis and applications in gas and humidity sensors

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2021年第6期40卷 1459-1476页

作者： Qiu-Ni Zhao ya-Jie Zhang Zai-Hua Duan Si Wang Can Liu ya-dong jiang Hui-Ling Tai State Key Laboratory of Electronic Thin Films and Integrated Devices School of Optoelectronic Science and EngineeringUniversity of Electronic Science and Technology of ChinaChengdu 610054China

Ti_(3)C_(2)T_(x),which is a novel two-dimensional(2 D)material,has received enormous interest in the field of sensor technology due to its large surface area,excellent electrical conductivity,and abundant active surface *** recent years,several Ti_(3)C_(2)T_(x)-based gases and humidity sensors have been developed and *** this review,we focus on the latest applications of Ti_(3)C_(2)T_(x)-based nanomaterials in gas and humidity ***,the synthesis of Ti_(3)C_(2)T_(x) from the dangerous fluorine-containing etching process to the safe fluorine-free preparation method was discussed,and the structures of the Ti_(3)C_(2)T_(x) controlled by different delamination methods were also ***,the functionalization of pristine Ti_(3)C_(2)T_(x) and composite strategies for enhancing its gas and humidity sensing performance were *** addition,the gas and humidity sensing mechanisms of sensors based on Ti_(3)C_(2)T_(x) were also ***,the challenges and opportunities for the use of Ti_(3)C_(2)T_(x) gas and humidity sensors were discussed to provide guidance on the promising potential of Ti_(3)C_(2)T_(x) in this field.

关键词： Ti_(3)C_(2)T_(x) Two-dimensional material Synthesis Gas sensor Humidity sensor

Self-assembled graphene oxide/polyethyleneimine films as high-performance quartz crystal microbalance humidity sensors

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2021年第6期40卷 1597-1603页

作者： Zhen Yuan Hui-Ling Tai Yuan-Jie Su Guang-Zhong Xie Xiao-Song Du ya-dong jiang State Key Laboratory of Electronic Thin Films and Integrated Devices School of Optoelectronic Science and EngineeringUniversity of Electronic Science and Technology of ChinaChengdu 610054China

As humidity is one of the most widely demanded environmental parameters,the precision of its detection is *** advanced humidity sensor will improve the validity of the humidity monitoring *** this study,a facile chemical layer-by-layer self-assembly(CLS)method was developed for fabricating graphene oxide(GO)/polyethyleneimine(PEI)multilayer *** to the chemical bonding between the PEI and GO,and the intrinsic stickiness of the PEI,layered films with different numbers of layers were successfully prepared using the CLS method and confirmed through ultraviolet-visible(UV-Vis)spectroscopy and the mass loading of quartz crystal microbalance(QCM).Morphological measurements revealed that the roughness and thickness of the films increased exponentially with the number of *** GO/PEI films were deposited on QCM electrodes using the CLS method to produce the humidity *** humidity measurement results showed a high sensitivity(37.84 Hz/%RH)and rapid response/recovery(<5 s/8 s)of the optimal sensor,which was superior to that of recently developed QCM sensors.

关键词： Humidity sensors Quartz crystal microbalance Graphene oxide Polyethyleneimine Self-assembly

Enhanced positive humidity sensitive behavior of p-reduced graphene oxide decorated with n-WS_(2) nanoparticles

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2021年第7期40卷 1762-1767页

作者： Zai-Hua Duan Qiu-Ni Zhao Cheng-Zhen Li Si Wang ya-dong jiang ya-Jie Zhang Bo-Hao Liu Hui-Ling Tai State Key Laboratory of Electronic Thin Films and Integrated Devices School of Optoelectronic Science and EngineeringUniversity of Electronic Science and Technology of ChinaChengdu 610054China

Most resistance-type humidity sensors exhibit negative humidity sensitivity,i.e.,their resistance decreases with a corresponding increase in *** is primarily attributed to the dominant role of ionic conduction in adsorbed *** this work,a humidity sensor based on a p-type reduced graphene oxide(p-rGO)with positive humidity sensitivity is ***,its positive humidity sensing response is further enhanced by n-type WS_(2) nanoparticles *** results show that both rGO and r GO/WS_(2) humidity sensors have good linear response in the relative humidity(RH)range of0%-91.5%.The sensitivity of the rGO/WS_(2) humidity sensor is 1.87 times that of rGO humidity sensor,which is mainly attributed to p-n heterojunction between rGO and WS_(2).Besides,the r GO/WS_(2) humidity sensor has small humidity hysteresis(-3%RH)and good *** work demonstrates a humidity sensor based on rGO/WS_(2) composite film and provides a facile route for fabricating humidity sensor with positive humidity sensing properties.

关键词： Reduced graphene oxide WS2 nanoparticles Heterojunction Humidity sensor Humidity sensing mechanism

QCM Sensors Based on PEI Films for CO_2 Detection

在线全文

学校读者我要写书评

暂无评论

Journal of Electronic Science and Technology 2015年第2期13卷 181-187页

作者： Guang-Zhong Xie Ting Kang Yong Zhou Tao Xie Hui-Ling Tai ya-dong jiang School of Optoelectronic Information University of Electronic Science and Technology of China

In this paper, quartz crystal microbalance（QCM） gas sensors coated with polyehtyleneimine（PEI）was utilized for carbon dioxide（CO2） detection. The sensing mechanism is based on the availability of reversible acid-base reactions between CO2 molecules and PEI at room temperature. The experimental results revealed that the PEI/starch sensor exhibited much higher sensitivity than that of pure PEI, and showed approximate linearity over a concentration region ranging from 500 ppm to 8000 ppm. The influence of humidity had also been investigated. Furthermore, the response and recovery time deceased as the operation temperatures increased. Finally, sensitivity loss after conservation for several days and reversibility of the sensors had been discussed.

关键词： starch reversible utilized availability coated approximate quartz linearity humidity conservation

A chitosan/amido-graphene oxide-based self-powered humidity sensor enabled by triboelectric effect

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2021年第8期40卷 1995-2003页

作者： Bo-Hao Liu Guang-Zhong Xie Cheng-Zhen Li Si Wang Zhen Yuan Zai-Hua Duan ya-dong jiang Hui-Ling Tai State Key Laboratory of Electronic Thin Films and Integrated Devices School of Optoelectronic Science and EngineeringUniversity of Electronic Science and Technology of ChinaChengdu610054China

In this work,amido-graphene oxide(GO-NH_(2))loaded chitosan(CTS)composite material(CTS/GO-NH_(2))that acts as both the triboelectric and sensing film was prepared on rotary fan-shaped triboelectric nanogenerator for humidity *** with the pristine CTSbased triboelectric humidity sensor(CTS-THS)and GONH_(2)-THS,the CTS/GO-NH_(2)-based humidity sensor exhibited higher humidity response and better linearity in the relative humidity(RH)range of 18.7%RH-91.5%*** above results can be explained by the massive exposed and less concealed hydrophilic functional groups of CTS with the help of the wrinkle structure of GO-NH_(2).Meanwhile,the CTS/GO-NH_(2)-THS possessed good repeatability and acceptable hysteresis(~6.2%RH).Finally,a humidity sensing mechanism coupling triboelectric contact charging effect with electrons transfer principle under moisture environment was established to interpret the enhanced humidity sensing performance of the composite film-based *** work demonstrates that CTS/GONH_(2) composite film can be utilized to fabricate humidity sensors based on the triboelectric effect.

关键词： Chitosan Amido-graphene oxide Triboelectric nanogenerator Humidity sensors Hydrogen bonding interaction

Recovery and in-situ reduction of precious metals by graphdiyne and graphdiyne oxide for antibacterial use

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2024年第4期43卷 1747-1757页

作者： Ming-Ji jiang ya-Na Zhang Ling-Shen Meng Jing Kang Yong-Jun Li Alideertu dong College of Chemistry and Chemical Engineering Inner Mongolia UniversityHohhot010021China Engineering Research Center of Dairy Quality and Safety Control Technology Ministry of EducationInner Mongolia UniversityHohhot010021China Department of Chemistry University of ZurichCH-8057ZurichSwitzerland Laboratory of Organic Solids and Beijing National Laboratory for Molecular Sciences Institute of ChemistryChinese Academy of SciencesBeijing100190China

Based on the in-situ self-reduction and chemical stability,graphdiyne(GDY)and graphdiyne oxide(GDYO)are used as trapping agents to investigate the ability for recovering Au^(3+),Ag^+,and Pd^(2+)under different pH values and interfering *** strong acidity at pH=1,these two agents demonstrate high select recovery towards the three precious metal ions,which could be insitu reduced to nanoparticles(NPs).In addition,superparamagnetic Fe_(3)O_(4)NPs are deposited on the surfaces of GDY and *** magnetic responses enable GDYFe_(3)O_(4)to recover precious metals conveniently and efficiently by the aid of an external magnetic *** study also confirms the antibacterial activity of the as-recovered NPs deposited on GDY and GDYO against Escherichia coli and Staphylococcus aureus(1×10^(5)colony-forming unit(CFU)·mL^(-1)),and the antibacterial rates are 100%.This strategy of recovering precious metals and subsequently reusing to combat pathogens will be of great significance for environmental remediation and biomedical applications.

关键词： Graphdiyne In-situ reduction Recovery Precious metals Antibacterial