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High color rendering index white LEDs fabricated using InP/ZnS green-emitting quantum dots and InP/ZnSe/ZnS red-emitting quantum dots

High color rendering index white LEDs fabricated using InP/Z...

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16th China International Forum on Solid State Lighting & 2019 International Forum on Wide Bandgap Semiconductors (第十六届中国国际半导体照明论坛暨2019国际第三代半导体论坛)

作者： Doudou Zhang Yuxian Yan Fan Cao Gongli Lin Xuyong Yang Wanwan Li Luqiao Yin Jianhua Zhang School of Materials Science and Engineering Shanghai UniversityShanghai 200072China Key Laboratory Key Laboratory of Advanced Display and System Applications Shanghai UniversityMinistry of Education State Key Lab of Metal Matrix Composites School of Materials Science and EngineeringShanghai Jiao T Key Laboratory of Advanced Display and System Applications Shanghai UniversityMinistry of Education Key Laboratory of Advanced Display and System Applications Shanghai UniversityMinistry of Education

ISBN: (数字)9781728157566

ISBN: (纸本)9781728157573

Quantum dots(QDs)have the advantages of spectrally adjustable,high quantum yield and narrow half-peak width,and are the most potential light-converting materials for white light that achieve high color rendering index and high *** InGaN blue light chip currently used excites Ce-doped yttrium aluminum garnet(YAG: Ce3+)yellow phosphor,and the white light-emitting diode(WLED)realized exhibits color rendering index(CRI)<80 and an unsatisfactory color coordinate because of lack of red spectral *** order to improve the CRI of white LEDs,in this paper,we fabricated InP/ZnS green-emitting QDs and InP/ZnSe/ZnS red-emitting QDs,and excited YAG: Ce3+yellow phosphor,InP/ZnS green-emitting QDs and InP/ZnSe/ZnS red-emitting QDs with blue chip,made WLED(Ⅰ),and compared with WLED(Ⅱ)generated by using blue LED chip to excite YAG: Ce3+yellow *** result shows that the WLED(Ⅰ)achieves a CRI of 90.3 at a driving current of 5 *** Commission International de L'Eclairage(CIE)chromaticity coordinates are(0.3393,0.3342),and the correlated color temperature(CCT)is 5186K,which is high quality white light close to sunlight.

关键词： Light emitting diodes II-VI semiconductor materials Zinc compounds Phosphors Color Indium phosphide III-V semiconductor materials

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Influence of thermal annealing-induced molecular aggregation on film properties and photovoltaic performance of bulk heterojunction solar cells based on a squaraine dye

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Frontiers of Materials Science 2018年第2期12卷 139-146页

作者： Pengpeng ZHANG Zhitian LING Guo CHEN Bin WEI 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

Squaraine （SQ） dyes have been considered as efficient photoactive materials for organic solar cells. In this work, we purposely controlled the molecular aggregation of an SQ dye, 2,4-bis[4-（N,N-dibutylamino）-2-dihydroxyphenyl] SQ （DBSQ- （OH）2） in the DBSQ（OH）2：[6,6]-phenyl-Cel-butyric acid methyl ester （PCBM） blend film by using the thermal annealing method, to study the influence of the molecular aggregation on film properties as well as the photovoltaic performance of DBSQ（OH）2：PCBM-based bulk heterojunction （BHJ） solar cells. Our results demonstrate that thermal annealing may change the aggregation behavior of DBSQ（OH）2 in the DBSQ（OH）2：PCBM film, and thus significantly influence the surface morphology, optical and electrical properties of the blend film, as well as the photovoltaic performance of DBSQ（OH）2：PCBM BHJ cells.

关键词： organic solar cells squaraine dye molecular aggregation film properties power conversion efficiency

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Design and Analysis of Cylindrical Liquid Lens Based on Electrowetting

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Guangxue Xuebao/Acta Optica Sinica 2025年第10期45卷

作者： Zhou, Le Ma, Xiangteng Zhao, Wenfeng Li, Xifeng Key Laboratory of Advanced Display and System Applications Ministry of Education School of Mechatronic Engineering and Automation Shanghai University Shanghai200072 China Kunshan Xuanrou Optoelectronics Technology Co. Ltd. Jiangsu Suzhou215300 China

Objective Cylindrical lenses, with their unique ability to focus light in a single dimension, are critical for applications such as beam shaping and improving illumination uniformity. However, most existing research on electrowetting-based liquid lenses focuses on spherical configurations, leaving cylindrical variants underexplored. These cylindrical lenses face challenges such as high driving voltages, limited focal ranges, and structural inefficiencies. In this paper, we address these challenges by proposing a novel cylindrical electrowetting liquid lens design featuring a conical cavity with segmented dielectric layers. Our approach aims to advance cylindrical liquid lens technology for compact optical systems, targeting low-voltage operation (35 ‒ 55 V), wide focal length tunability (139 ‒ 999 mm), and enhanced optical performance. We provide foundational insights for applications in laser processing, optical sensing, and medical imaging by bridging theoretical advancements with practical implementation. Methods We employ a multidisciplinary approach combining theoretical analysis, numerical simulations, and experimental validation. The lens structure incorporates a conical cavity with alternating thick (15 µm) and thin (3 µm) dielectric layers [Fig. 1(d)], enabling asymmetric liquid interface control based on the Young-Lippmann equation (Eq. 1). Theoretical modeling establishes the relationship between applied voltage and interface curvature, while a fifth-degree polynomial (Eq. 2) ensures high-precision fitting of simulated interface profiles (R2>0.98, Table 1). COMSOL Multiphysics 6.0 simulates voltage-dependent interface deformations (Fig. 2), and Zemax evaluates optical performance, including focal length, aberrations, and field curvature (Figs. 6 and 7). Fabrication involves photolithography and parylene-C deposition to create dielectric layers (Fig. 8), followed by experimental testing using a laser-CCD setup to measure focal length indirectly via spot wi

关键词： Fiber optic sensors

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Publisher Correction: Fabrication of red-emitting perovskite LEDs by stabilizing their octahedral structure

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Nature 2024年第8020期631卷 E10页

作者： Lingmei Kong Yuqi Sun Bin Zhao Kangyu Ji Jie Feng Jianchao Dong Yuanzhi Wang Zirui Liu Shabnum Maqbool Yunguo Li Yingguo Yang Linjie Dai Wanhee Lee Changsoon Cho Samuel D Stranks Richard H Friend Ning Wang Neil C Greenham Xuyong Yang Key Laboratory of Advanced Display and System Applications of Ministry of Education Shanghai University Shanghai China. Cavendish Laboratory University of Cambridge Cambridge UK. College of Physics Jilin University Changchun China. Department of Chemical Engineering and Biotechnology University of Cambridge Cambridge UK. CAS Key Laboratory of Crust-Mantle Materials and Environments School of Earth and Space Sciences University of Science and Technology of China Hefei China. Shanghai Synchrotron Radiation Facility (SSRF) Zhangjiang Lab Shanghai Advanced Research Institute Chinese Academy of Sciences Shanghai China. School of Microelectronics Fudan University Shanghai China. Department of Material Science and Engineering Pohang University of Science and Technology (POSTECH) Pohang Republic of Korea. Institute for Convergence Research and Education in Advanced Technology Yonsei University Seoul Republic of Korea. College of Physics Jilin University Changchun China. ningwang@***. Cavendish Laboratory University of Cambridge Cambridge UK. ncg11@cam.ac.uk. Key Laboratory of Advanced Display and System Applications of Ministry of Education Shanghai University Shanghai China. yangxy@***. Shanghai Engineering Research Center for Integrated Circuits and Advanced Display Materials Shanghai China. yangxy@***.

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P-13.3: Efficient Blue and Color Tunable White OLED Based on Platinum Complex

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SID Symposium Digest of Technical Papers 2021年第S1期52卷

作者： Jianfeng Guo Zhangcheng Liao Rongrong Xia Hong Lin Zixing Wang Key Laboratory of Advanced Display and System Applications Ministry of Education Shanghai University 149 Yanchang Rd. Shanghai 200072 P. R. China

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P-13.7: Azaspirobifluorene Derivatives Enhanced Efficiency and Lifetime of Blue Phosphorescent OLEDs

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SID Symposium Digest of Technical Papers 2021年第S1期52卷

作者： Rongrong Xia Dehai Dou Zhangcheng Liao Jianfeng Guo Peng Wu Zixing Wang Key Laboratory of Advanced Display and System Applications Ministry of Education Shanghai University 149 Yanchang Rd. Shanghai 200072 P. R. China

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A silver-graphene modified acetylcholinesterase biosensor for detecting organophosphate pesticides

A silver-graphene modified acetylcholinesterase biosensor fo...

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International Conference on (ICEPT) Electronic Packaging Technology

作者： Wangbo Wangbo Wenha Shu Huaying Hu Jianhua Zhang Lianqiao Yang Microelectronics research&design center Shanghai University Key Laboratory of Advanced Display and System Applications Ministry of Education Shanghai China

ISBN: (数字)9781728150642

ISBN: (纸本)9781728150659

A highly sensitive, stable electrochemical acetylcholinesterase biosensor with silver-graphene modified was fabricated to detect organophosphorus pesticides, dichlorvos. Complete production and test process were characterized by scanning electron microscopy, cyclic voltammetry, differential pulse voltammetry. The electrochemical signal of biosensor got to be well amplified because of the modification of silver-graphene. The better detection performance was got, compared with the sensors that lack or no modified. Moreover, TiO2 sol-gel and high viscous chitosan were used as a highly efficient immobilization matrix for immobilizing acetylcholinesterase. The detection linear range of the biosensor to dichlorvos, a model organophosphorus pesticides compound, was from 0.036 μM (7.9 ppb) to 22.6 μM, with a limit of detection of 7.4 nM (1.6 ppb). The biosensor was highly reproducible and stable in detection and storage.

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[email protected]Core–Shell Nanostructures: Toward a New Platform for Controlling Optical Properties at the Nanoscale

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The Journal of Physical Chemistry C 2021年第37期125卷 20606-20616页

作者： Wajdi Chaâbani Julien Proust Samuel Ouellet Artur Movsesyan Jérémie Béal Renaud Bachelot Tao Xu Anne-Laure Baudrion Pierre-Michel Adam Denis Boudreau Abdallah Chehaidar Jérôme Plain Light nanomaterials nanotechnologies (L2n) Laboratory CNRS ERL 7004 University of Technology of Troyes 12 rue Marie Curie F-10004 Troyes Cedex France Laboratoire de Physique-Mathématiques et Applications Faculté des Sciences de Sfax Université de Sfax B.P. 1171 3000 Sfax Tunisia Centre d’optique Photonique et Laser Université Laval Québec Québec G1 V 0A6 Canada School of Mechatronic Engineering and Automation Key Laboratory of Advanced Display and System Applications Ministry of Education Shanghai University 200072 Shanghai China

Hybrid dielectric–metal colloid nanoparticle heterostructures have recently attracted attention in both fundamentals and applications. In this paper, we developed a new approach based on mechanical grinding and chemical synthesis in order to obtain hybrid dielectric–metal nanoparticles. By increasing the amounts of the stabilizing agent (polyvinylpyrrolidone (PVP)), three different types of hybrid colloidal structures were obtained, Si/Au core–island, core–shell, and core–shell oligomers heterostructures, respectively. The obtained colloidal heterostructures were analyzed by dynamic light scattering (DLS) and scanning electron microscope (SEM) measurements. Moreover, the optical properties of hybrid nanostructure have been carefully studied. A splitting was observed in the extinction spectra of colloidal solutions for different Si/Au colloidal heterostructures compared to Si colloidal nanoparticles, attributed to the hybridization of plasmon. Thanks to photolitholographic and drop-cast deposition techniques on a substrate, we were able to locate the colloidal nanoparticles heterostructures and to measure the backward scattering spectra using single-particle dark-field scattering spectroscopy. To better understand scattering results, FDTD simulations of scattering cross-section and electric near-field distributions were performed. As is well-known, the scattering spectrum of the pristine Si core is dominated by electric and magnetic dipolar modes in the visible region. More importantly, the scattering spectra of Si/Au core–island and core–shell support several phenomena such as collective magnetic dipolar modes and multiple Fano lineshapes. Our finding highlights the potential of our dielectric–metal heterostructures as a platform for studying light–matter interactions at the nanoscale.

关键词： Semiconducting nanostructured materials Gold Nanoparticles Scattering Heterostructures

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The narrow-band organic photodetectors based on organic photo-filtering layers using a transfer printing technology

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Scientific Reports 2025年第1期15卷 1-10页

作者： Pengchao Zhou Lei Fan Jipeng Ma Kuang Sheng Jialu Gu Hong Lian Wei Shi Bin Wei Kunping Guo Affiliated Hospital of Jining Medical University Jining 272000 Shandong P. R. China School of Mechatronic Engineering and Automation Shanghai University Shanghai Shanghai 200072 P. R. China Key Laboratory of Advanced Display and System Applications Ministry of Education Shanghai University Shanghai 200072 P. R. China Shaanxi Engineering Research Center of Flat Panel Display Technology School of Electronic Information and Artificial Intelligence Shaanxi University of Science and Technology Xi’an 710021 Shaanxi P. R. China

Aiming at the response spectral of organic photodetectors (OPDs), we investigate a method of preparing the narrow-band near-infrared (NIR) OPDs by using thin film transfer print technology (TFTPT) to prepare the active layer of bulk heterojunction on the organic photo-filtering layer—a functional layer which can block some specific wavelengths of light and prevent these photons from reaching the next functional layer. Herein, short-wavelength photons are absorbed by the photo-filtering layer to form excitons, but they cannot be successfully dissociated due to the lack of a dissociation interface to the acceptor for eventual composite annihilation. While long-wavelength photons can effectively pass through the photo-filtering layer to reach the active layer and be absorbed and dissociated into free electrons and holes and eventually realize the narrow-band optical response. A narrow-band NIR OPD is prepared with a response peak of 790 nm and a full width at half maximum of 62 nm. Under the bias voltage of -5 V, the responsivity and specific detectivity of the device at 790 nm are 0.24 A/W and 1.39 × 1012Jones, respectively. The responsivity and specific detectivity of OPDs prepared based on our method can be flexibly adjusted by the combination of different photo-filtering and active layers, and the universality of our method is also proved.

关键词： Bulk heterojunction Narrow-band organic photodetectors Near-infrared Thin film transfer printing technology

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Effect of TADF fluorescent isomers on the solar cell performance and dielectric characteristics of organic Schottky junctions

Effect of TADF fluorescent isomers on the solar cell perform...

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International Conference on (ICEPT) Electronic Packaging Technology

作者： Jie TANG Weiguang LI Junle YU Yanqiong ZHENG Bin WEI Xifeng LI School of Materials Science and Engineering Shanghai University Shanghai China Key Laboratory of Advanced Display and System Applications of Ministry of Education Shanghai University Shanghai China

ISBN: (数字)9781728150642

ISBN: (纸本)9781728150659

We have found that some fluorescent small molecules could be used as donor in organic Schottky junctions (OSJs) and achieved good performance. There has been no report on the application of thermally activated delayed fluorescence (TADF) luminescent material on OSJs. In this work, the effect of TADF isomers on the solar cell performance and dielectric characteristics of the OSJs were investigated. All the doped OSJs demonstrate higher Jsc than the neat C 60 OSJ, and 4CzTPN achieves the highest photovoltaic performance. However, the overall efficiency of these OSJs is not so high probably arising from the high photoluminescence quantum yield of these donors. The dielectric characteristics including Z-V, C-V, and Z-f were investigated, and the Z-V characteristic shows a reverse trend with the Jsc. For the C-V characteristics, the first V peak demonstrates a similar trend with the open circuit voltage and the built-in potential. The 4CzPN OSJ depicts much higher capacitance for the second peak than the 4CzIPN and 4CzTPN based OSJs, indicating the existence of more traps, resulting in a relatively low Jsc. For Z-f characteristics, the impedance of the doped OSJs is slightly lower from 20 Hz to 10 7 Hz than the neat C 60 OSJ.

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