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Chinese Physics B 2017年第6期26卷 275-279页

作者：赵宣何大伟王永生胡音付晨李雪 key laboratory of luminescence and optical information Beifing Jiaotong University Beijing 100044 China

A fluorescent probe for the sensitive and selective determination of copper ion（Cu^2＋） is presented. It is based on the use of tungsten disulfide quantum dots（WS2 QDs） which is independent of the p H of solution and emits strong blue fluorescence. Copper ions could cause aggregation of the WS2 QDs and lead to fluorescence quenching of WS2 QDs. The change of fluorescence intensity is proportional to the concentration of Cu^2＋, and the limit of detection is 0.4 μM. The fluorescent probe is highly selective for Cu^2＋ over some potentially interfering ions. These results indicate that WS2 QDs,as a fluorescent sensing platform, can meet the selective requirements for biomedical and environmental application.

关键词： WS2 quantum dots photolulninescence biosensor

Enhanced microwave absorption performance of MOF-derived hollow Zn-Co/C anchored on reduced graphene oxide

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Chinese Physics B 2021年第6期30卷 610-616页

作者： Yue Wang Dawei He Yongsheng Wang key laboratory of luminescence and optical information Ministry of EducationInstitute of Optoelectronic TechnologyBeijing Jiaotong UniversityBeijing 100044China

Composite materials assembled by metal/carbon nanoparticles and 2 D layered flakes can provide abundant interfaces,which are beneficial for high-performance microwave absorbers. Herein, Zn-Co/C/RGO composites, composed of ZnCo metal-organic framework-derived Zn-Co/C nanoparticles and reduced graphene oxide(RGO), were obtained through a facile method. The multilayer structure was due to the introduction of hollow Zn-Co/C nanoparticles in the RGO sheets. ZnCo/C nanoparticles provided abundant polarization and dipole centers on the RGO surface, which enhanced the microwave absorption abilities. Different concentrations of RGO were introduced to optimize impedance matching. The minimum reflection loss(R_(L)) of Zn-Co/C/RGO with a thickness of 1.5 mm reached-32.56 dB with the bandwidth corresponding to R_(L) at-10 dB, which can reach 3.92 GHz, while a minimum R_(L) of-47.15 dB at 11.2 GHz was also obtained at a thickness of 2.0 mm. The electromagnetic data demonstrate that Zn-Co/C/RGO presented excellent absorption performance and has potential for application in the microwave absorption field.

关键词： microwave absorption metal nanoparticles metal-organic framework(MOF) reduced graphene oxide

Direct Photolithography of WO_(x)Nanoparticles for High‑Resolution Non‑Emissive Displays

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Nano-Micro Letters 2025年第3期17卷 297-309页

作者： Chang Gu Guojian Yang Wenxuan Wang Aiyan Shi Wenjuan Fang Lei Qian Xiaofei Hu Ting Zhang Chaoyu Xiang Yu‑Mo Zhang laboratory of Optoelectronic information technology and Devices Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201People’s Republic of China Hangzhou Bay laboratory of Advanced Nano‑Optoelectronic Materials and Devices Qianwan Institute of CNITECHNingbo 315336People’s Republic of China Smart Materials for Architecture Research Lab Innovation Center of Yangtze River DeltaZhejiang UniversityJiaxing 314100People’s Republic of China University of Science and technology of China Hefei 230026People’s Republic of China State key Lab of Supramolecular Structure and Materials College of ChemistryJilin UniversityChangchun 130012People’s Republic of China

High-resolution non-emissive displays based on electrochromic tungsten oxides(WOx)are crucial for future near-eye virtual/augmented reality interactions,given their impressive attributes such as high environmental stability,ideal outdoor readability,and low energy ***,the limited intrinsic structure of inorganic materials has presented a significant challenge in achieving precise patterning/pixelation at the micron ***,we successfully developed the direct photolithography for WOx nanoparticles based on in situ photo-induced ligand *** strategy enabled us to achieve ultra-high resolution efficiently(line widthoptical modulation(55.9%),and durability(>3600 cycles),as well as promising applications in electronic logos,pixelated displays,flexible electronics,*** success and advancements presented here are expected to inspire and accelerate research and development(R&D)in high-resolution non-emissive displays and other ultra-fine micro-electronics.

关键词： Electrochromic Direct photolithography WOx nanoparticles In situ photo-induced ligand exchange High-resolution displays

PHOTOCONDUCTIVE PROPERTIES OF PVK:Alq_3 BLEND FILMS STUDIED BY STEADY-STATE AND TIME-RESOLVED TRANSIENT PHOTOCURRENT SPECTRA

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Chinese Journal of Polymer Science 2008年第3期26卷 249-254页

作者：候延冰 key laboratory of luminescence and optical information Ministry of Education Institute of Optoelectronic TechnologyBeijing Jiaotong UniversityBeijing 100044China

The carrier transport properties of the blends of the hole transport material poly(N-vinylcarbazole) (PVK) and the electron transport material tris (8-hydroxyquinolinolato) aluminumⅢ(Alq_3) are investigated at room temperature using steady-state and time-resolved transient photocurrent measurements as a function of doping concentration of Alq_*** to lower LUMO and higher HOMO energy level of Alq_3 than those of PVK,Alq_3 molecules may act as carrier trap states in PVK films at low ***,at...

关键词： Steady-State photocurrent Transient photocurrent Polymer

Effects of NPB anode buffer layer on charge collection in ZnO/MEH-PPV hybrid solar cells

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Chinese Physics B 2013年第12期22卷 503-508页

作者：龚伟徐征赵谡玲刘晓东樊星杨倩倩孔超 key laboratory of luminescence and optical information (Beijing Jiaotong University) Ministry of Education Institute of Optoelectronics technology Beijing Jiaotong University

We investigate the effects of （N,N’-diphenyl）-N,N’-bis（1-naphthyl）-1,1’-biphenyl-4,4’-diamine （NPB） buffer layers on charge collection in inverted ZnO/MEH-PPV hybrid devices. The insertion of a 3-nm NPB thin layer enhances the efficiency of charge collection by improving charge transport and reducing the interface energy barrier, resulting in better device performances. S-shaped light J–V curve appears when the thickness of the NPB layer reaches 25 nm, which is induced by the inefficient charge extraction from MEH-PPV to Ag. Capacitance–voltage measurements are performed to further investigate the influence of the NPB layer on charge collection from both simulations and experiments.

关键词： NPB capacitance–voltage measurement charge collection buffer layer

Influence of Surface Quenching Effects on Luminescent Dynamics of ZnS：Mn^2＋ Nanocrystals

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Chinese Physics Letters 2008年第2期25卷 698-699页

作者：高长城黄世华由芳田康凯冯颖 key laboratory of luminescence and optical information (Ministry of Education) Institute of Optoelectronic Technology Beijing Jiaotong University Beijing 100044

A model describing surface quenching of isolated ion centres in nanocrystals is proposed based on the energy transfer between the doped ions and the nanocrystalline surface quenching centres. The quenching rate depends on the position of the ions in the nanocrystal, hence the decay curve under non-selective excitation is generally nonexponential. The decay curve calculated with this model is in good agreement with that of the ^4T1→^6A1 emission in ZnS：Mn^2＋ nanocrystals.

关键词： pulsars x-ray spectra relativity and gravitation redshift

Role of TiO2 Nanotube on Improvement of Performance of Hybrid Photovoltaic Devices

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Chinese Physics Letters 2009年第1期26卷 272-275页

作者：师全民侯延冰李研冯志慧刘小君 key laboratory of luminescence and optical information (Ministry of Education) Institute of Optoelectronic Technology Beijing Jiaotong University Beijing 100044

The performance of TiO2 nanotubes in bulk heterojunction of poly （2-methoxy-5-（2＇-ethylhexyloxy）-1, 4-phenylenevinylene）（MEH-PPV）/TiO2 nanotubes is investigated. The transport properties are studied by using the time-of-flight technique （TOF）. The carrier mobilities of both holes and electrons are not improved for the MEH-PPV：TiO2 composites compared with the pristine MEH-PPV. However, photoluminescence under the influence of the electric field indicates that the dissociation of excitons in the MEH-PPV：TiO2 composites, which is facilitated by photoinduced charge transfer, only requires a smaller electric field.

关键词： SOLAR-CELLS MEH-PPV PHOTOluminescence TRANSPORT COMPOSITE FILM

Hole Transport Properties of MEH-PPV at Different Excitation Wavelengths

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Chinese Physics Letters 2006年第4期23卷 950-952页

作者：师全民侯延冰鲁晶靳辉李云白 key laboratory of luminescence and optical information (Ministry of Education)Institute of Optoelectronic technology Beijing Jiaotong Universiy Beijing 100044

Using the time-of-flight photocurrent measurements, we investigate the hole transport properties of polymer 2-methoxy, 5-（2＇-ethyl-hexyloxy）-1, 4-phenylene vinylene （MEH-PPV）. The change of hole transport properties from non-dispersive transport to a dispersive type is presented, with the increasing excitation wavelength near the MEH-PPV absorption edge. At room temperature, the effective mobility of MEH-PPV depends on the applied electric field as commonly seen in some organic materials.

关键词： LIGHT-EMITTING-DIODES ELECTRON POLYMERS

Polarization Dependence of Linewidth Enhancement Factor in Semiconductor optical Amplifier and Its Implication for Nonlinear Polarization Rotation

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Chinese Physics Letters 2009年第10期26卷 110-113页

作者：赵爽吴重庆王拥军 key laboratory of luminescence and optical information (Ministry of Education) Institute of Optical Information School of Science Beijing Jiaotong University Beijing 100044

Linewidth enhancement factors （LEFs） of the transverse electric mode and the transverse magnetic mode in bulk semiconductor optical amplifiers are measured using the nonlinear optical loop mirror method and the principal state of polarization vector method. The polarization dependence of LEFs plays an important role in the nonlinear polarization rotation. The relationship between the polarization-dependence of LEFs and nonlinear polarization rotation in the Stokes space is demonstrated.

关键词： sea surface nonliear interaction numerical method

The Effect of the Oxygen Plasma Treatment for ITO and ZnO Nanorods on the Electroluminescence of ZnO Nanorod/MEH-PPV Heterostructure Devices

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Chinese Physics Letters 2013年第3期30卷 172-175页

作者： ZHAO Su-Ling WANG Yong-Sheng GAO Song YANG Yi-Fan XU Zheng Institute of Optoelectronic technology and Key Laboratory of Luminescence and Optical Information(Ministry of Education)Beijing Jiaotong UniversityBeijing 100044

Series devices of ITO/ZnO/ZnO nanorods/MEH-PPV/Al have been *** and ZnO nanorods of some devices are treated by O_(2) *** electroluminescence of different devices is detected under different *** electroluminescence of ZnO nanorods at 380 nm is observed in all the *** intensity of 380 nm increases when both ITO and ZnO nanorods are *** turn-on voltage of the treated device is lower than that of the non-treated device,and the EL power is *** the thickness of MEH-PPV is sufficiently thin,only 380 nm electroluminescence,besides a weak defect emission at 760 nm,is *** enhancement mechanism of the electroluminescence of the treated devices is discussed.

关键词： O/Zn nanorods Oxygen