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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 technology.Despite 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 fusion.In 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 concentration.Our 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 photodiodes.Furthermore,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 nm.By 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

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Site occupation and energy transfer in full color emitting phosphor Ba2Ca(BO3)2:Ce3+(K+),Eu^(2+),Mn2+

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Journal of Rare Earths 2022年第11期40卷 1691-1698,I0002页

作者： Qingsong Hu Zaifa Pan guijie liang Hubei Key Laboratory of Low Dimensional Optoelectronic Materials and Devices Hubei University of Arts and ScienceXiangyang 441053China College of Chemical Engineering Zhejiang University of TechnologyHangzhou 310014China

White light-emitting diodes(WLEDs)fabricated by single-phase full color emitting phosphor are an emerging solution for health lighting.The crystallographic site occupation of activators in a proper host lattice is crucial for sophisticated design of such phosphor.Here,we report a high quality white lightemitting phosphor Ba_(2)Ca(BO_(3))_(2):Ce^(3+)(K^(+)),Eu^(2+),Mn^(2+)with spectral distribution covering whole visible region.Blue light emission originates from Ce3+ions occupying preferentially Ba^(2+)site by controlling synthesis conditions.Green and red lights are obtained from Eu^(2+)occupying Ba2+(and Ca)site and Mn2+occupying Casite,respectively.In this triple-doped phosphor,strong red emission with a low concentration of Mn2+is realized by the efficient energy transfer from Ce3+and Euto Mn.Furthermore,high quality white light is accomplished by properly tuning the relative doping amount of Ce^(3+)(K^(+))/Eu^(2+)/Mn^(2+)based on efficient simultaneous energy transfer.The results indicate that Ba_(2)Ca(BO_(3))_(2):Ce^(3+)(K^(+)),Eu^(2+),Mn^(2+)is a promising white light-emitting phosphor in WLEDs application.

关键词： Single-phase Full color phosphor Site preference occupation Energy transfer Ba2Ca(BO3)2:Ce3+(K+) Eu^(2+) Mn2+ Rare earths

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2D/2D covalent organic framework/CdS Z-scheme heterojunction for enhanced photocatalytic H_(2) evolution:Insights into interfacial charge transfer mechanism

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Journal of Materials Science & Technology 2023年第6期137卷 223-231页

作者： Ruiqi Gao Junxian Bai Rongchen Shen Lei Hao Can Huang Lei Wang guijie liang Peng Zhang Xin Li Institute of Biomass Engineering Key Laboratory of Energy Plants Resource and UtilizationMinistry of Agriculture and Rural AffairsSouth China Agricultural UniversityGuangzhou 510642China Hubei Key Laboratory of Low Dimensional Optoelectronic Materials and Devices Hubei University of Arts and ScienceXiangyang 441053China State Centre for International Cooperation on Designer Low-Carbon and Environmental Materials(CDLCEM) School of Materials Science and EngineeringZhengzhou UniversityZhengzhou 450001China

Covalent organic frameworks(COFs)with high crystallinity and flexible designability have been consid-ered as promising candidates for photocatalytic hydrogen evolution.However,the existence of unpropi-tious exciton effects in COFs leads to poor charge separation,and thus results in low photocatalytic effi-ciency.Herein,to improve the photoelectron migration efficiency,we designed a 2D/2D organic/inorganic direct Z-scheme COF-based heterojunction(TpTAP/CdS),by the in-situ growing of CdS nanosheets on the COF copolymerized via 2,4,6-tris(4-aminophenyl)-1,3,5-triazine(TAP)and 1,3,5-triformylphloroglucinol(Tp).The femtosecond transient absorption(fs-TA)decay kinetics of TpTAP-COF and TpTAP/CdS further reveal the processes of shallow electron trapping and the recombination of the free photogenerated electron-hole pairs.In particular,the transient absorption traces for TpTAP-COF and TpTAP/CdS normal-ized to the photoinduced absorption peak can effectively verify the Z-scheme charge transfer between TpTAP-COF and CdS,which could enhance the charge mobility and separation,thus reducing the pho-tocorrosion of CdS.Additionally,ultraviolet photoelectron spectroscopy(UPS),in-situ X-ray photoelec-tron spectroscopy(XPS),transient photovoltage measurements,and electron spin resonance(ESR)spec-troscopy further confirm the establishment of the internal electric field(IEF).This work demonstrates the important role of COFs in the construction of 2D/2D organic/inorganic direct Z-scheme heterojunctions and offers a new avenue to explain the criticality of dynamics of the photogenerated carriers for the construction of Z-scheme heterojunctions.

关键词： Femtosecond transient absorption Photocatalytic hydrogen evolution Covalent organic frameworks(COFs) Direct Z-scheme heterojunction CdS

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Effective photocatalytic hydrogen evolution by Ti_(3)C_(2)-modified CdS synergized with N-doped C-coated Cu_(2)O in S-scheme heterojunctions

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Chinese Journal of Structural Chemistry 2023年第12期42卷 43-51页

作者： Kaihui Huang Boning Feng Xinghua Wen Lei Hao Difa Xu guijie liang Rongchen Shen Xin Li Institute of Biomass Engineering Key Laboratory of Energy Plants Resource and UtilizationMinistry of Agriculture and Rural AffairsSouth China Agricultural UniversityGuangzhou510642China College of Materials and Energy South China Agricultural UniversityGuangzhou510642China Hunan Key Laboratory of Applied Environmental Photocatalysis Changsha UniversityChangsha410022China Hubei Key Lab Low Dimens Optoelect Mat&Devices Hubei University of Arts and ScienceXiangyang441053China

Photocatalytic hydrogen evolution through water splitting holds tremendous promise for converting solar energy into a clean and renewable fuel source.However,the efficiency of photocatalysis is often hindered by poor light absorption,insufficient charge separation,and slow reaction kinetics of the photocatalysts.In this study,we designed and synthesized a novel S-scheme heterojunction comprising Ti_(3)C_(2)MXene,CdS nanorods,and nitrogen-doped carbon coated Cu_(2)O(Cu_(2)O@NC)core-shell nanoparticles.Ti_(3)C_(2)MXene as a cocatalyst enhances the light absorption and charge transfer of CdS nanorods.Simultaneously,the core-shell Cu_(2)O@NC nanoparticles establish a pathway for transferring photogenerated electrons and create a favorable band alignment for efficient hydrogen evolution.The synergistic effects of Ti_(3)C_(2)MXene and Cu_(2)O@NC on CdS nanorods result in multiple charge transfer channels and improved photocatalytic performance.The optimal hydrogen evolution rate of the Ti_(3)C_(2)-CdS-Cu_(2)O@NC S-scheme heterojunction photocatalyst is 7.4 times higher than that of pure CdS.Experimental techniques and DFT calculations were employed to explore the structure,morphology,optical properties,charge dynamics,and band structure of the heterojunction.The results revealed that the S-scheme mechanism effectively suppresses the recombination of photogenerated carriers and facilitates the separation and migration of photo-generated electrons and holes to the reaction sites.Furthermore,Ti_(3)C_(2)MXene provides abundant active sites essential for accelerating the surface H_(2)-evolution reaction kinetics.The Cu_(2)O@NC core-shell nanoparticles with a large surface area and high stability are closely adhered to CdS nanorods and establish an S-scheme internal electric field with CdS nanorods to drive charge separation.This investigation provides valuable insights into the rational design of CdS-based photocatalysts,enabling efficient hydrogen production by harnessing the robust kinetic driving force provided by the S-

关键词： Photocatalytic hydrogen evolution Cu_(2)O@NC CdS S-scheme heterojunction Ti_(3)C_(2)MXene cocatalyst

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CuMn_(2)O_(4)/石墨炔S型异质结上锚定氧化助催化剂促进曙红敏化光催化析氢

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Chinese Journal of Catalysis 2024年第1期56卷 88-103页

作者：杨成李鑫李梅梁桂杰靳治良北方民族大学化学与化学工程学院宁夏太阳能化学转化技术重点实验室国家民委化学工程与技术重点实验室宁夏银川750021 华南农业大学能源植物资源与利用农业农村部重点实验室生物质工程研究所广东广州510642 湖北文理学院低维光电材料与器件湖北省重点实验室湖北襄阳441053

半导体光催化剂有效的电荷分离及利用是光催化制氢的关键.单一半导体催化剂由于光生电子-空穴对的快速复合导致低的光催化活性,构建异质结是提高光生电荷分离以及电子转移效率的有效方法.此外,助催化剂的引入同样能够促进光催化剂表面... 详细信息

半导体光催化剂有效的电荷分离及利用是光催化制氢的关键.单一半导体催化剂由于光生电子-空穴对的快速复合导致低的光催化活性,构建异质结是提高光生电荷分离以及电子转移效率的有效方法.此外,助催化剂的引入同样能够促进光催化剂表面电子和空穴的分离,并且其协同效应可促使更多载流子流向相应的助催化剂位点而增强光催化性能.因此,同时构建异质结及合适的氧化位点成为解决光生电子-空穴对有效分离及利用的重要研究方向.本文报道了一种同时构建S型异质结和氧化位点促进CuMn_(2)O_(4)光生电子-空穴对有效分离及利用的可行性策略.虽然在制备CuMn_(2)O_(4)的过程中通过调控制备温度能够自身诱导生成具有氧化能力的Mn_(2)O_(3)来作为氧化位点,但是只存在氧化位点时不能很好地克服光生电子-空穴对的重组现象而导致光催化活性较低.基于此,本文巧妙地利用CuMn_(2)O_(4)自身诱导生成氧化位点的特性并引入石墨炔还原端而构建S型异质结,在氧化位点及S型异质结同时存在的情况下增强光生电子的有效转移.此外,在自身诱导生成氧化位点和S型异质结的协同作用下,促进了复合光催化剂中的光生电子和光生空穴精确定向迁移到相应的还原位点和氧化位点.傅里叶变换红外光谱和拉曼光谱证实成功制备了石墨炔.X射线衍射(XRD)、X射线光电子能谱(XPS)、扫描电子显微镜(SEM)和高分辨透射电子显微镜(TEM)等结果表明,成功制备了600-CuMn_(2)O_(4)/GDY-40%(6-CG-40%)样品(600°C焙烧,石墨炔质量百分含量为40%).经过组分优化的复合光催化剂6-CG-40%的催化性能达到1586.54μmol g^(‒1)h^(‒1),是CuMn_(2)O_(4)(106.73μmol g^(‒1)h^(‒1))和石墨炔(70.57μmol g^(‒1)h^(‒1))产氢活性的13.86倍和21.48倍高.利用UV-vis光谱、电化学性能和接触角测试等分析6-CG-40%复合光催化剂产氢性能提升的原因,并通过密度泛函理论计算和相关实验表征验证Mn_(2)O_(3)作为氧化助催化剂的合理性.结果表明,原位诱导生成的Mn_(2)O_(3)氧化助催化剂和引入石墨炔构建的S型异质结有效抑制了光生电子-空穴对的复合,从而优化了光生载流子转移效率,最终增强了曙红敏化6-CG-40%光催化析氢性能.综上所述,在控制诱导因子原位生成Mn_(2)O_(4)氧化助催化剂的基础上引入石墨炔还原端构建了S型异质结,在助催化剂与异质结两者的协同作用下极大程度地改善了光生电子-空穴对的严重复合现象,这项工作为解决光催化制氢领域中制约光催化剂制氢能力的关键问题提供了可行性思路.

关键词：石墨炔氧化助催化剂电荷分离 S型异质结光催化制氢

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环境因素对水痘发病影响的研究进展

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中华疾病控制杂志 2024年第1期28卷 101-107页

作者：栾桂杰张伟燕刘少楠陈萌孙靓山东省疾病预防控制中心免疫预防管理所济南250014

目的综合分析气象因素和大气污染等环境因素对水痘发病的影响。方法在中国知网、万方、Web of Science、PubMed等数据库检索2021年12月31日前发表的环境因素与水痘发病关系的文献,对纳入研究的基本信息、方法和结果等进行整理分析。结... 详细信息

目的综合分析气象因素和大气污染等环境因素对水痘发病的影响。方法在中国知网、万方、Web of Science、PubMed等数据库检索2021年12月31日前发表的环境因素与水痘发病关系的文献,对纳入研究的基本信息、方法和结果等进行整理分析。结果共纳入19项气象因素研究和3项大气污染研究。气温、相对湿度和降水的变化会造成水痘发病的增多,大气压、风速、日照等与水痘发病之间的相关性存在地区差异;PM2.5、PM10和NO2等大气污染物会增加水痘发病的风险。结论气象因素和大气污染等环境因素暴露会影响水痘的发病,需采取针对性的防护措施。

关键词：环境因素气象因素大气污染水痘

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调控三芴酮基共价有机框架中的局域极化促进光催化析氢活性

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Science China Materials 2024年第2期67卷 504-513页

作者：郝磊沈荣晨秦朝超李能胡浩斌梁桂杰李鑫 Institute of Biomass Engineering Key Laboratory of Energy Plants Resource and UtilizationMinistry of Agriculture and Rural AffairsSouth China Agricultural UniversityGuangzhou 510642China Henan Key Laboratory of Infrared Materials and Spectrum Measures and Applications School of PhysicsHenan Normal UniversityXinxiang 453007China State Key Laboratory of Silicate Materials for Architectures Wuhan University of TechnologyWuhan 430070China Key Laboratory of Efficient Utilization of Oil and Gas Resources in Longdong College of Petroleum and Chemical EngineeringLongdong UniversityQingyang 745000China Hubei Key Lab Low Dimens Optoelect Mat&Devices Hubei University of Arts and ScienceXiangyang 441053China

局部电荷的强离域和强偶极矩是影响共价有机框架(COFs)基光催化剂催化析氢性能的两个关键因素.然而,基于精确的调控结构模型来系统研究这种构效关系的报告相对较少.本研究提出了一种新的策略,通过合理的设计,制备了三种三芴酮基COFs,通... 详细信息

局部电荷的强离域和强偶极矩是影响共价有机框架(COFs)基光催化剂催化析氢性能的两个关键因素.然而,基于精确的调控结构模型来系统研究这种构效关系的报告相对较少.本研究提出了一种新的策略,通过合理的设计,制备了三种三芴酮基COFs,通过在分子水平上调控单体的结构和偶极来提高局部电荷离域指数.我们重点研究这三种三芴酮基COF的局部电荷离域与光催化性能之间的构效关系.在不同三芴酮基COF中,1,3,5-三(对甲酰基苯基)苯基COF(TeTpb-COF)展现出21.6 mmol g^(-1)h^(-1)的最高析氢速率,与2,4,6-三(4-醛基苯基)-1,3,5-三嗪基COF(TeTt-COF,0.2mmol g^(-1)h^(-1))相比,光催化析氢性能提高了108倍.这种性能的增强可归因于其强大的分子内置电场提高了供体-受体嵌段单元中光生电荷的有效分离效率.这项工作证实了调整构建块可以极大增强三芴酮基COFs中的局部偶极矩,从而显著改善光催化析氢性能.构建模块的调控策略为创建高效的新型COF基光催化析氢平台提供了新机会.

关键词： covalent organic frameworks photocatalytic hydrogen evolution truxenone dipole moment local charge delocalization

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Self-trapped exciton emission in inorganic copper(Ⅰ)metal halides

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Frontiers of Optoelectronics 2021年第4期14卷 459-472页

作者： Boyu ZHANG Xian WU Shuxing ZHOU guijie liang Qingsong HU Hubei Key Laboratory of Low Dimensional Optoelectronic Materials and Devices Hubei University of Arts and ScienceXiangyang 441053China

The broad emission and high photoluminescence quantum yield of self-trapped exciton(STE)radiative recombination emitters make them an ideal solution for single-substrate,white,solid-state lighting sources.Unlike impurities and defects in semiconductors,the formation of STEs requires a lattice distortion,along with strong electron–phonon coupling,in low electrondimensional materials.The photoluminescence of inorganic copper(Ⅰ)metal halides with low electron-dimensionality has been found to be the result of STEs.These materials were of significant interest because of their leadfree,all-inorganic structures,and high luminous efficiencies.In this paper,we summarize the luminescence characteristics of zero-and one-dimensional inorganic copper(I)metal halides with STEs to provide an overview of future research opportunities.

关键词： self-trapped exciton(STE) low electrondimensional inorganic copper(Ⅰ)metal halides

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印尼煤在配煤炼焦中的应用

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燃料与化工 2024年第2期55卷 26-29页

作者：梁文华曹贵杰迁安中化煤化工有限责任公司唐山064404

对印尼煤煤质指标评价进行分析,结合公司整体煤炭资源情况,与肥煤、焦煤、1/3焦煤做质量比对,分析优缺点,尝试代替部分1/3焦煤、焦煤配煤炼焦使用。在配煤中作为1/3焦煤使用,焦炭质量稳定,起到降灰的作用。

关键词：印尼煤煤质评价配煤

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Groups-dependent phosphines as the organic redox for point defects elimination in hybrid perovskite solar cells

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Journal of Energy Chemistry 2021年第3期30卷 23-29页

作者： Zhengli Wu Miao Zhang Yifan Liu Yuxi Dou Yinjie Kong Lin Gao Weitao Han guijie liang Xiao Li Zhang Fuzhi Huang Yi-Bing Cheng Jie Zhong State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070HubeiChina Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Xianhu Hydrogen ValleyFoshan 528200GuangdongChina Hubei Key Laboratory of Low Dimensional Optoelectronic Materials and Devices Hubei University of Arts and ScienceXiangyang 441053HubeiChina School of Materiale Science and Engineering Zhengzhou UniversityZhengzhou 450001HenanChina Department of Materials Science and Engineering Monash UniversityVIC 3800Australia

Lead(Pb)^(0) and iodine(I)^(0) point defects generated during perovskite solar cell(PSC)fabrication and photoconversion form deep band energy levels as the carriers’recombination centers.These defects not only deteriorate device efficiency,but also facilitate chemical degradation with ion migration,resulting in restricted device lifetime.Herein,we present a novel type of phosphines as the point defects stabilizer for hybrid perovskite solar cells with enhanced performances.Three phosphines with varied side groups of tributyl,trioctyl and triphenyl are exampled as the dopants in perovskite films.The group dependent redox properties were observed in the perovskite film,dependent on their molecular weights and steric hinderances of phosphines.The partially oxidized tributyl phosphine(TBUP)with additional tributyl phosphine oxides(TBPO)is efficient in reduction of lead(Pb)^(0) and iodine(I)^(0) concentrations during the device fabrication and operation.The device with TBUP-TBPO pair showed enhanced power conversion efficiency(PCE)to 20.48% and maintain 91.7% of their initial PCEs after 500 h at 65℃ thermal annealing.Thus,this work presents an efficient route of utilize the phosphine species to reduce point defects in the perovskite film,which promoting further development of novel phosphorous additives with defects stabilization,interface passivation and encapsulation for low-cost solution processed PSCs.

关键词： Redox Perovskite solar cells Phosphine organics Lead defect Stability

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