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Achieving Narrowed Bandgaps and Blue-Light Excitability in Zero-Dimensional Hybrid Metal Halide Phosphors via Introducing Cation-Cation Bonding

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Energy & Environmental Materials 2024年第1期7卷 294-300页

作者： Pengfei Fu Shining Geng Ruixiang Mi Ranyun Wu Guangya Zheng Binbin Su Zhiguo Xia Guangda Niu jiang tang Zewen Xiao Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074China The State Key Laboratory of Luminescent Materials and Devices Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied TechniquesSchool of Materials Science and TechnologySouth China University of TechnologyGuangzhou 510640China School of Optical and Electronic Information Huazhong University of Science and TechnologyWuhan 430074China

Zero-dimensional(0D)hybrid metal halides,which consist of organic cations and isolated inorganic metal halide anions,have emerged as phosphors with efficient broadband ***,these materials generally have too wide bandgaps and thus cannot be excited by blue light,which hinders their applications for efficient white light-emitting diodes(WLEDs).The key to achieving a blue-light-excitable 0D hybrid metal halide phosphor is to reduce the fundamental bandgap by rational chemical *** this work,we report two designed hybrid copper(I)iodides,(Ph_(3)MeP)_(2)Cu_(4)I_(6)and(Cy_(3)MeP)_(2)Cu_(4)I_(6),as blue-light-excitable yellow phosphors with ultrabroadband *** these compounds,the[Cu_(4)I_(6)]^(2-)anion forms an I6 octahedron centered on a cationic Cu_(4)*** strong cation-cation bonding within the unique cationic Cu_(4)tetrahedra enables significantly lowered conduction band minimums and thus narrowed bandgaps,as compared to other reported hybrid copper(I)*** ultrabroadband emission is attributed to the coexistence of free and self-trapped *** WLED using the[Cu_(4)I_(6)]^(2-)anion-based single phosphor shows warm white light emission,with a high luminous efficiency of 65 Im W^(-1)and a high color rendering index of *** work provides strategies to design narrow-bandgap 0D hybrid metal halides and presents two first examples of blue-light-excitable 0D hybrid metal halide phosphors for efficient WLEDs.

关键词： blue-light-excitable cation-cation bonding hybrid metal halide phosphor zero-dimensional

High Efficiency Formamidinium-Cesium Perovskite-Based Radio-Photovoltaic Cells

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Energy & Environmental Materials 2024年第1期7卷 160-167页

作者： Runlong Gao Rui Chen Pengying Wan Xiao Ouyang Qiantao Lei Qi Deng Xinyu Guan Guangda Niu jiang tang Wei Chen Zonghao Liu Xiaoping Ouyang Linyue Liu Sino-French Institute of Nuclear Engineering and Technology Sun Yat-Sen UniversityZhuhai 519082China State Key Laboratory of Intense Pulsed Radiation Simulation and Effect Northwest Institute of Nuclear TechnologyXi'an 710024China Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074China School of Microelectronics Xi'an Jiaotong UniversityXi'an 710049China Key Laboratory of Beam Technology of Ministry of Education College of Nuclear Science and TechnologyBeijing Normal UniversityBeijing 100875China Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China

Radio-photovoltaic cell is a micro nuclear battery for devices operating in extreme environments,which converts the decay energy of a radioisotope into electric energy by using a phosphor and a photovoltaic *** phosphors with high light yield and good environmental stability have been developed,but the performance of radio-photovoltaic cells remains far behind expectations in terms of power density and power conversion efficiency,because of the poor photoelectric conversion efficiency of traditional photovoltaic converters under low-light *** paper reports an radio-photovoltaic cell based on an intrinsically stable formamidinium-cesium perovskite photovoltaic converter exhibiting a wide light wavelength response from 300 to 800 nm,high open-circuit voltage(V_(oc)),and remarkable efficiency at low-light *** a He ions accelerator is adopted as a mimickedαradioisotope source with an equivalent activity of 0.83 mCi cm^(-2),the formamidinium-cesium perovskite radio-photovoltaic cell achieves a V_(oc)of 0.498 V,a short-circuit current(J_(sc))of 423.94 nA cm^(-2),and a remarkable power conversion efficiency of 0.886%,which is 6.6 times that of the Si reference radio-photovoltaic cell,as well as the highest among all radio-photovoltaic cells reported so *** work provides a theoretical basis for enhancing the performance of radio-photovoltaic cells.

关键词： formamidinium-cesium perovskite phosphor photovoltaic converter power conversion efficiency radio-photovoltaic cell

Retinomorphic X-ray detection using perovskite with hydrionconductive organic cations

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The Innovation 2024年第4期5卷 111-117,110页

作者： Hang Yin Jincong Pang Shan Zhao Haodi Wu Zihao Song Xing Li Zhiping Zheng Ling Xu jiang tang Guangda Niu Wuhan National Laboratory for Optoelectronics and School of Optical and Electronic Information Huazhong University of Science and TechnologyWuhan 430074China Optical Valley Laboratory Wuhan 430074China Institute of Microelectronics of the Chinese Academy of Sciences Beijing 100029China Research Institute of Huazhong University of science and technology in Shenzhen Shenzhen 518057China

X-ray detection is crucial across various sectors,but traditional techniques face challenges such as inefficient data transmission,redundant sensing,high power consumption,and *** innovative idea of a retinomorphic X-ray detector shows great ***,its implementation has been hindered by the absence of active layers capable of both detecting X-rays and serving as memory *** response to this critical gap,our study integrates hybrid perovskite with hydrion-conductive organic cations to develop a groundbreaking retinomorphic X-ray *** novel device stands at the nexus of technological innovation,utilizing X-ray detection,memory,and preprocessing capabilities within a single hardware *** core mechanism underlying this innovation lies in the transport of electrons and holes within the metal halide octahedral frameworks,enabling precise X-ray ***,the hydrion movement through organic cations endows the device with short-term resistive memory,facilitating rapid data processing and ***,our retinomorphic X-ray detector boasts an array of formidable features,including reconfigurable shortterm memory,a linear response curve,and an extended retention *** practical terms,this translates into the efficient capture of motion projections with minimal redundant data,achieving a compression ratio of 18.06%and an impressive recognition accuracy of up to 98.6%.In essence,our prototype represents a paradigm shift in X-ray detection *** its transformative capabilities,this retinomorphic hardware is poised to revolutionize the existing X-ray detection landscape.

关键词： perovskite conductive redundant

Nonreciprocal Photon Blockade Based on Zeeman Splittings Induced by a Fictitious Magnetic Field

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Chinese Physics Letters 2024年第7期41卷 36-46页

作者：苏欣金飚兵唐江山夏可宇 College of Engineering and Applied Sciences National Laboratory of Solid State Microstructuresand Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210023China Research Institute of Superconductor Electronics(RISE)&Key Laboratory of Optoelectronic Devices and Systems with Extreme Performances of MOE School of Electronic Science and EngineeringNanjing UniversityNanjing 210023China

Quantum nonreciprocity, such as nonreciprocal photon blockade, has attracted a great deal of attention due to its unique applications in quantum information processing. Its implementation primarily relies on rotating nonlinear systems, based on the Sagnac effect. Here, we propose an all-optical approach to achieve nonreciprocal photon blockade in an on-chip microring resonator coupled to a V-type Rb atom, which arises from the Zeeman splittings of the atomic hyperfine sublevels induced by the fictitious magnetic field of a circularly polarized control laser. The system manifests single-photon blockade or multi-photon tunneling when driven from opposite directions. This nonreciprocity results from the directional detunings between the countercirculating probe fields and the V-type atom, which does not require the mechanical rotation and facilitates integration. Our work opens up a new route to achieve on-chip integrable quantum nonreciprocity, enabling applications in chiral quantum technologies.

关键词： effect reciprocal quantum

Double-ended passivator enables dark-current-suppressed colloidal quantum dot photodiodes for CMOS-integrated infrared imagers

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InfoMat 2024年第1期6卷 108-122页

作者： Peilin Liu Shuaicheng Lu Jing Liu Bing Xia Gaoyuan Yang Mo Ke Xuezhi Zhao Junrui Yang Yuxuan Liu Ciyu Ge Guijie Liang Wei Chen Xinzheng Lan Jianbing Zhang Liang Gao jiang tang Wuhan National Laboratory for Optoelectronics(WNLO)and School of Optical and Electronic Information Huazhong University of Science and TechnologyWuhanthe People's Republic of China Wenzhou Advanced Manufacturing Technology Institute Huazhong University of Science and TechnologyWenzhouthe People's Republic of China School of Physics and Electronic Engineering Hubei University of Arts and ScienceXiangyangthe People's Republic of China School of Integrated Circuits Huazhong University of Science and TechnologyWuhanthe People's Republic of China School of Engineering Physics Shenzhen Technology UniversityShenzhenthe People's Republic of China Optics Valley Laboratory Wuhanthe People's Republic of China Shenzhen Huazhong University of Science and Technology Research Institute Shenzhenthe People's Republic of China

Lead sulfide(PbS)colloidal quantum dot(CQD)photodiodes integrated with silicon-based readout integrated circuits(ROICs)offer a promising solution for the next-generation short-wave infrared(SWIR)imaging *** their potential,large-size CQD photodiodes pose a challenge due to high dark currents resulting from surface states on nonpassivated(100)facets and trap states generated by CQD *** this work,we present a novel approach to address this issue by introducing double-ended ligands that supplementally passivate(100)facets of halidecapped large-size CQDs,leading to suppressed bandtail states and reduced defect *** results demonstrate that the dark current density is highly suppressed by about an order of magnitude to 9.6 nA cm^(2) at -10 mV,which is among the lowest reported for PbS CQD ***,the performance of the photodiodes is exemplary,yielding an external quantum efficiency of 50.8%(which corresponds to a responsivity of 0.532 A W^(-1))and a specific detectivity of 2.5×10^(12) Jones at 1300 *** integrating CQD photodiodes with CMOS ROICs,the CQD imager provides high-resolution(640×512)SWIR imaging for infrared penetration and material discrimination.

关键词： CMOS integration colloidal quantum dots dark current suppression double-ended passivation infrared imager

铅铋合金夹杂颗粒对含缺陷弯管侵蚀的数值模拟

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中山大学学报（自然科学版）（中英文） 2024年第5期63卷 156-166页

作者：唐江许洪瀚姜乃斌中山大学中法核工程与核技术学院广东珠海519082

采用计算流体动力学与离散相模型耦合的方法,计算不同工况条件下存在缺陷管道的侵蚀速率。对比不同工况下的侵蚀速率和侵蚀关键区域,揭示了缺陷对侵蚀的影响模式。研究结果表明:(1)随着铅铋共晶流速的增加,含缺陷管道和完整管道的侵蚀... 详细信息

采用计算流体动力学与离散相模型耦合的方法,计算不同工况条件下存在缺陷管道的侵蚀速率。对比不同工况下的侵蚀速率和侵蚀关键区域,揭示了缺陷对侵蚀的影响模式。研究结果表明:(1)随着铅铋共晶流速的增加,含缺陷管道和完整管道的侵蚀区域均显著扩大。含缺陷管道的最大侵蚀速率降低,完整管道的侵蚀速率略有上升。(2)颗粒尺寸的增大会导致含缺陷管道的侵蚀区域从缺陷位置转移至入口直管段;对于完整管道,侵蚀则集中在弯管入口附近,两种管道的侵蚀区域均明显扩大。(3)缺陷的存在增加了凹坑位置的湍流强度,弯管的侵蚀位置集中于凹坑位置,并随着凹坑尺寸的增大,凹坑位置的最大侵蚀速率也显著上升。

关键词：铅铋合金颗粒凹坑缺陷离散相模型 CFD-DPM模型侵蚀率

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Reversible Optical Isolators and Quasi-Circulators Using a Magneto-Optical Fabry-Pérot Cavity

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Chinese Physics Letters 2024年第4期41卷 59-68页

作者：张天天周文鹏李志向唐宇涛许帆吴浩东张涵唐江山阮亚平夏可宇 College of Engineering and Applied Sciences National Laboratory of Solid State Microstructuresand Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093China Shenzhen Shaanxi Coal Hi-tech Research Institute Co. LtdShenzhen 518083China School of Physics Nanjing UniversityNanjing 210023China jiangsu Key Laboratory of Artificial Functional Materials Nanjing UniversityNanjing 210023China

Nonreciprocal optical devices are essential for laser protection,modern optical communication and quantum information processing by enforcing one-way light *** conventional Faraday magneto-optical nonreciprocal devices rely on a strong magnetic field,which is provided by a permanent *** a result,the isolation direction of such devices is fixed and severely restricts their applications in quantum *** this work,we experimentally demonstrate the simultaneous one-way transmission and unidirectional reflection by using a magneto-optical Fabry-Pérot cavity and a magnetic field strength of 50 *** optical isolator and a three-port quasi-circulator are realized based on this nonreciprocal cavity *** isolator achieves an isolation ratio of up to 22 dB and an averaged insertion loss down to 0.97 *** quasi-circulator is realized with a fidelity exceeding 99% and an overall survival probability of 89.9%,corresponding to an insertion loss of~0.46 *** magnetic field is provided by an electromagnetic coil,thereby allowing for reversing the light circulating *** reversible quasi-circulator paves the way for building reconfigurable quantum networks.

关键词： quantum reciprocal insertion

Solution-Processed Hybrid Europium (Ⅱ) lodide Scintillator for Sensitive X-Ray Detection

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Research 2024年第1期2024卷 49-57页

作者： Xue Zhao Pengfei Fu Pan Li Hainan Du Jinsong Zhu Ciyu Ge Longbo Yang Boxiang Song Haodi Wu Tong Jin Qingxun Guo Liang Wang Jinghui Li Zewen Xiao Jingjing Chang Guangda Niu Jiajun Luo jiang tang School of Microelectronics Xidian UniversityXi'an 710071China Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074China China Optics Valley Laboratory Wuhan 430074China School of Optical and Electronic Information Huazhong University of Science and TechnologyWuhan 430074China

Lead halide perovskite nanocrystals have recently demonstrated great potential as x-ray scintillators,yet they stll suffer toxicity issues,inferior light yield(LY)caused by severe *** bivalent europium ions(Eu^(2+))with intrinsically efficient and self-absorption-free d-f transition are a prospective replacement for the toxic Pb^(2+).Here,we demonstrated solution-processed organic-inorganic hybrid halide BA_(10)Eul_(12)(BA denotes C_(4)H_(9)NH_(4)^(+))single crystals for the first time.

关键词： absorption halide perovskite

基于膦氧化物钝化的热蒸发像素化钙钛矿发光二极管

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发光学报 2024年第1期45卷 1-10页

作者：刘念罗家俊杜培培刘征征杜鹃唐江华中科技大学武汉光电国家研究中心湖北武汉430074 华中科技大学集成电路学院湖北武汉430074 国科大杭州高等研究院物理与光电工程学院浙江杭州310024 中国科学院上海光学精密机械研究所强场激光物理国家重点实验室上海201800

热蒸发法是实现钙钛矿发光二极管商业化显示应用的可靠技术。然而,热蒸发沉积的钙钛矿薄膜的PLQY经常较低,并且钝化手段不如溶液法丰富。本文报道了一种通过原位共蒸技术将钝化剂引入钙钛矿层的方法,这种方法能够钝化真空沉积钙钛矿中... 详细信息

热蒸发法是实现钙钛矿发光二极管商业化显示应用的可靠技术。然而,热蒸发沉积的钙钛矿薄膜的PLQY经常较低,并且钝化手段不如溶液法丰富。本文报道了一种通过原位共蒸技术将钝化剂引入钙钛矿层的方法,这种方法能够钝化真空沉积钙钛矿中的缺陷,增强辐射复合,并提高钙钛矿的PLQY。氧膦基团与不饱和位点形成配位络合,钝化了钙钛矿的晶界缺陷,并抑制了带尾态缺陷。基于最佳比例的钙钛矿薄膜所制备的LED器件表现出最大6.3%的EQE,最大亮度为35642 cd/m^(2)。更进一步地,基于全真空的器件制备工艺,获得了最大EQE为5.0%的312 ppi高分辨率PeLEDs。总之,本文为热蒸发PeLEDs的缺陷钝化提供了有用的指导,证明热蒸发PeLEDs在效率和亮度提升方面具有巨大潜力,并具备商业化前景。

关键词：钙钛矿发光二极管热蒸发缺陷钝化像素化

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