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High performance and stable pure-blue quasi-2D perovskite light-emitting diodes by multifunctional zwitterionic passivation engineering

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Advanced Photonics 2024年第2期6卷 32-40页

作者： Chao Shen Shuyan Fang Jibin Zhang Xiangfei Liang Chenhui Su Jian Qing Wanzhu Cai Yunhan Luo Renqiang Yang Lintao Hou Jinan University College of Physics and Optical Engineering Guangdong Provincial Engineering Technology Research Center of Vacuum Coating Technologies and New Energy Materials Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy Materials Jinan University College of Physics and Optical Engineering Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications Zhengzhou University School of Physics and Microelectronics Key Laboratory of Materials Physics of Ministry of Education Jinan University Key Laboratory of Optoelectronic Information and Sensing Technologies of Guangdong Higher Education Institutes Jianghan University School of Optoelectronic Materials and Technology Key Laboratory of Optoelectronic Chemical Materials and Devices of Ministry of Education

Despite the rapid advances of red and green perovskite light-emitting diodes（Pe LEDs）, achieving high brightness with high external quantum efficiency（EQE） remains a challenge for the pure-blue Pe LEDs,which greatly hinders their practical applications, such as white-light illumination and in optical communication as a high-speed and low-loss light source. Herein, we report a high-performance pure-blue Pe LED based on mixed-halide quasi-2D perovskites incorporated with a zwitterionic molecule of 3-（benzyldimethylammonio）propanesulfonate（3-BAS）. Experimental and density functional theory analysis reveals that 3-BAS can simultaneously eliminate non-radiative recombination loss, suppress halide migration, and regulate phase distribution for smoothing energy transfer in the mixed-halide quasi-2D perovskites, leading to the final perovskites with high photoluminescence quantum yield and robust spectrum stability. Thus, the highperformance pure-blue Pe LED with a recorded brightness with 1806 cd m;-2;and a relative higher EQE of 9.25% is achieved, which is successfully demonstrated in a visible light communication system for voice signal transmission. We pave the way for achieving highly efficient pure-blue Pe LEDs with great application potential in future optical communication networks.

关键词： pure-blue PeLEDs quasi-2D perovskite zwitterionic additive visible light communication

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First-principles study of the relationship between the formation of single atom catalysts and lattice thermal conductivity

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Chinese Chemical Letters 2024年第6期35卷 502-506页

作者： Chaozheng He Pei Shi Donglin Pang Zhanying Zhang Long Lin Yingchun Ding Department of Chemistry and Chemical Engineering Liaocheng UniversityLiaocheng 252059China Henan key Laboratory of Materials on Deep-Earth Engineering School of Materials Science and EngineeringHenan Polytechnic UniversityJiaozuo 454000China School of Materials Science and Engineering Henan Polytechnic UniversityJiaozuo 454000China Department of Basic Medicine North Sichuan Medical CollegeNanchong 637000China

Single atom catalysts(SACs)have been in the forefront of catalysts research because of their high efficiency and low cost and provide new ideas for development of renewable energy conversion and storage ***,the relationship between the intrinsic properties of materials such as lattice thermal conductivity and catalysis remains to be *** this work,the lattice thermal conductivity of BN and graphene was calculated by Sheng *** addition,the adsorption properties of 3d-TM(TM=V,Cr,Mn,Fe,Co,Ni)on BN and graphene were investigated using first-principles methods,and it was found that Ni atom can form relatively stable SACs compared to other *** molecular dynamics(MD)simulation and migration barrier of Ni loaded on BN and graphene were *** study found that graphene has higher thermal conductivity and is easier to form SACs than BN,but the SACs formed on BN surface have higher thermodynamic stability.

关键词： First-principles calculation Thermal conductivity Single atom catalysts Graphene BN

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天语计划——寻找第二个太阳系及探索动态宇宙

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天文学报 2024年第4期65卷 1-43页

作者：冯发波芮易成杜芝茂林清张聪聪周丹崔开明 OGIHARA Masahiro 杨明林杰蔡永志杨涛只庞晓莹简明杰李文雄郭恒潇史弦史建春李荐扬郭康柔姚嵩陈啊明贾鹏谭先瑜 JENKINS S.James 蒋宏轩张铭缘李可欣肖光耀郑书玥宣一帆郑捷何敏 JONES R.A.Hugh 宋翠英上海交通大学李政道研究所上海201210 上海交通大学物理与天文学院上海200240 上海天文馆(上海科技馆分馆) 上海200127 中国科学院上海天文台上海200030 同济大学测绘与地理信息学院上海200092 中国科学院星系宇宙学重点实验室(中国科学技术大学) 合肥230026 中国科学技术大学天文与空间科学学院合肥230026 中国科学院云南天文台昆明650216 中国科学院天体结构与演化重点实验室昆明650216 国际超新星中心-云南省国际超新星研究重点实验室昆明650216 西安交通大学物理学院西安710049 西交利物浦大学物理系苏州215123 上海师范大学上海市星系与宇宙学半解析研究重点实验室上海200234 Department of Astronomy Stockholm University Stockholm11421 中国科学院国家天文台北京100101 中山大学大气科学学院珠海519082 太原理工大学电子信息与光学工程学院太原030024 Instituto de Estudios Astrofısicos Facultad de Ingenierıa y CienciasUniversidad Diego Portales Santiago8170641 Centro de Astrof´ısica y Tecnologıas Afines(CATA)Santiago 8480000 山东大学空间与物理学院山东省光学天文与日地空间环境重点实验室威海264209 中国科学院国家天文台中国科学院天文光学技术重点实验室北京100101 Centre for Astrophysics Research University of Hertfordshire HertfordshireAL109AB 清华大学天体物理研究中心北京100084

像木星和土星这样的冷巨行星对类地行星的形成和宜居性起到了关键作用,因此,对像太阳系这样具有多个冷巨行星的系统的搜寻具有重要意义.Kepler以及TESS (Transiting Exoplanet Survey Satellite)太空望远镜成功地通过凌星的方法发现了... 详细信息

像木星和土星这样的冷巨行星对类地行星的形成和宜居性起到了关键作用,因此,对像太阳系这样具有多个冷巨行星的系统的搜寻具有重要意义.Kepler以及TESS (Transiting Exoplanet Survey Satellite)太空望远镜成功地通过凌星的方法发现了大量短周期行星,然而这些巡天项目的观测基线不足以发现更长周期的行星.为此,天语计划将部署两台1m望远镜(天语一号和天语二号),用于结合天语和其他计划的数据通过凌星法来发现冷巨行星及其他行星,并最终发现类太阳系.天语一号具有约10平方度的视场以及高速CMOS (complementary metal-oxide-semiconductor)科学相机,将对超过1000万颗恒星每小时进行一次高精度测光采样,并通过天语二号的多波段测光、光谱仪以及高分辨率成像对天语一号发现的候选行星进行确认.天语望远镜将放置于海拔约4000m的中国青海冷湖,是目前中国境内最好观测台址之一.天语对亮于14等星的测光精度为0.1%,对亮于18等星的测光精度优于1%,天语预计在5yr内将在类太阳周期发现超过300颗凌星行星,其中包括约17颗冷巨行星.基于系统轨道共面以及孪生地球发生率为10%的假设,天语预计将发现1-2个类太阳系,并可被未来的地球2.0计划所证实.此外,天语还将通过多种巡天观测模式测量从亚秒到周时标的光变,探测不同时标的时域现象,包括超新星早期光变、稀有变星和双星、潮汐瓦解事件、Be星、彗星活动以及系外小行星等.这些发现不仅将深化我们对宇宙的理解,还将为公众科学和科普提供重要平台.

关键词：技术:测光行星与卫星:探测行星与卫星:形成恒星:超新星:普通恒星:变星:普通小行星:普通恒星:伽马射线暴:普通

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天语计划——寻找第二个太阳系及探索动态宇宙（英文）

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天文学报 2024年第4期 3-45页

作者：冯发波芮易成杜芝茂林清张聪聪周丹崔开明 OGIHARA Masahiro 杨明林杰蔡永志杨涛只庞晓莹简明杰李文雄郭恒潇史弦史建春李荐扬郭康柔姚嵩陈啊明贾鹏谭先瑜 JENKINS S.James 蒋宏轩张铭缘李可欣肖光耀郑书玥宣一帆郑捷何敏 JONES R.A.Hugh 宋翠英上海交通大学李政道研究所上海交通大学物理与天文学院上海天文馆(上海科技馆分馆) 中国科学院上海天文台同济大学测绘与地理信息学院中国科学院星系宇宙学重点实验室(中国科学技术大学) 中国科学技术大学天文与空间科学学院中国科学院云南天文台中国科学院天体结构与演化重点实验室国际超新星中心-云南省国际超新星研究重点实验室西安交通大学物理学院西交利物浦大学物理系上海师范大学上海市星系与宇宙学半解析研究重点实验室 Department of Astronomy Stockholm University 中国科学院国家天文台中山大学大气科学学院太原理工大学电子信息与光学工程学院 Instituto de Estudios Astrofísicos Facultad de Ingeniería y CienciasUniversidad Diego Portales Centro de Astrofísica y Tecnologías Afines(CATA) 山东大学空间与物理学院山东省光学天文与日地空间环境重点实验室中国科学院国家天文台中国科学院天文光学技术重点实验室 Centre for Astrophysics Research University of Hertfordshire 清华大学天体物理研究中心

关键词：技术:测光行星与卫星:探测行星与卫星:形成恒星:超新星:普通恒星:变星:普通小行星:普通恒星:伽马射线暴:普通

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Factors limiting the recruitment of Quercus schottkyana,a dominant evergreen oak in SW China

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Plant Diversity 2018年第6期40卷 277-283页

作者： Ke Xia Roy Turkington Hong-yu Tan Lei Fan Germplasm Bank of Wild Species Kunming Institute of BotanyChinese Academy of SciencesKunming 650201China Botany Department and Biodiversity Research CentreUniversity of British ColumbiaVancouverBCV6T IZ4Canada Department of Statistics Colorado State UniversityFort CollinsCO80523USA

Quercus schottkyana is a dominant species of oak in the Asian evergreen broad-leaved forests in southwestern China but seedlings are uncommon and recruitment is rare. Annual acorn production by Q. schottkyana is variable and the acorns are exposed to a series of mortality risks. Understanding the factors that limit recruitment of the oak requires knowledge of the oak's life cycle from acorn production to germination and seedling establishment. In this study, we first tested the effects of acorn density on establishment of seedlings by placing batches of acorns at different densities throughout the study ***, we tested the effects of herbivores on seedling survival by erecting fences around both natural and transplanted seedling populations. Our results show that even though the rate of seedling establishment increases as acorn density increases(for 32-8000 acorns?m^(-2)), survival rates of seedlings in the field were generally low(0-0.6%). We show that seedling recruitment of Q. schottkyana is mainly limited to the acorn stage where 88% of the acorns died from the combined effects of desiccation and predation by weevils(Curculio) and bark beetles(Coccotrypes sp.). Herbivory results in the death of some seedlings and consequently also affects the recruitment of seedlings of Q. schottkyana.

关键词： Cyclobalanopsis glaucoides Desiccation Predation Recalcitrant seeds Seedling yunnan

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Variation in floral characters,particularly floral scent,in sapromyophilous Stemona species

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Journal of Integrative Plant Biology 2017年第11期59卷 825-839页

作者： Gao Chen Wei-Chang Gong Jia Ge Johann Schinnerl Bin Wang Wei-Bang Sun Kunming Botanical Garden Kunming Institute of BotanyChinese Academy of SciencesKunming 650201China key Laboratory for Plant Diversity and Biogeography of East Asia Kunming Institute of BotanyChinese Academy of SciencesKunming 650201China College of Life Science and Technology Honghe UniversityMengzi 661199China Department of Botany and Biodiversity Research Division of Systematic and Evolutionary BotanyUniversity of ViennaA-Io3o WienRennweg 14Austria University of Chinese Academy of Sciences Beijing 100049China

Flowers or inflorescences often deploy various signals, including visual, olfactory, and gustatory cues,that can be detected by their pollinators. In many plants,these cues and their functions are poorly *** the interactions between floral cues and pollinators is crucial for analyzing the reproductive success of flowering plants. In this study, we examined the composition of the fetid floral scents produced by several Stemona species, including nine S. tuberosa populations from across China, using dynamic headspace adsorption, gas chromatography, and mass spectrometry techniques. We compared variations in floral phenotype,including floral longevity, nectar rewards, pollinator behavior, and flower length and color among the Stemona species. Of the 54 scent compounds identified,the major compounds include fetid dimethyl disulfide,dimethyl trisulfide, 1-pyrroline, butyric acid, p-cresol,isoamyl alcohol, and indole. We detected striking differentiation in floral scent at both the species and population level, and even within a population of plants with different colored flowers. Floral characteristics related to sapromyophily and deceptive pollination,including flower color mimicking livor mortis and a lack of nectar, were found in five Stemona species, indicating that Stemona is a typical sapromyophilous taxon. Species of this monocot genus might employ evolutionary tactics to exploit saprophilous flies for pollination.

关键词： Variation in floral characters, particularly florascent sapromyophilous Stemona species

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Reproductive biology of Magnolia sinica(Magnoliaecea),a threatened species with extremely small populations in yunnan,China

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Plant Diversity 2016年第5期38卷 253-258页

作者： Ye Chen Gao Chen Jing Yang Weibang Sun Kunming Botanical Garden Kunming Institute of BotanyChinese Academy of SciencesKunming650201 YunnanChina University of Chinese Academy of Sciences 100049 BeijingChina

Magnolia sinica is one of the most threatened trees endemic to Southeast *** on our investigations,only 52 individuals and eight populations are found in the *** has been categorized as Critically Endangered on the IUCN Red List and identified as a "Plant Species with Extremely Small Populations(PSESP)".Its fruit/seed set is very low and seedlings are rarely found in the *** is hypothesized that it may encounter obstacles to reproductive *** study,therefore,focuses on its reproductive biology,knowledge of which is essential for effective *** of this species are protogynous and nocturnal,and possess a two-day rhythm of sexual *** the first night of anthesis,the flowers are in the pistillate stage during which tepals open at dusk and close approx.1 h later(except for the open outer ones).They remain closed until the next afternoon,when flowers,now in the staminate stage,re-open and remain so until the tepals *** beetles enter into the flowers and remain trapped throughout the night as the flower closes,during which time they feed on ***-gathering bees are found to visit the re-opened flowers and the beetles are released during this *** species of Pleocomidae and Curculionidae beetles appear to be effective *** is a self-compatible,pollinator-dependent species,and its fruit/seed set can be significantly increased by *** functional seed dispersers have been found in its extant natural *** findings suggest that it may face both pollination and seed disperser insufficiencies in its current fragmented habitats,which may account for its low *** we propose conservation strategies based on our findings.

关键词： Magnolia sinica PSESP Flowering process Pollination Seed dispersal Germination

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Seed dispersal by hornets:An unusual insect-plant mutualism

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Journal of Integrative Plant Biology 2017年第11期59卷 792-796页

作者： gao chen zheng-wei wang yan qin wei-bang sun kunming botanical garden kunming institute of botanychinese academy of sciencesKunming 650204China key laboratory for plant diversity and biogeography of east asia kunming institute of botanychinese academy of sciencesKunming 650204China chemi-ecology group of key laboratory of tropical forest ecology xishuangbanna tropical botanical gardenchinese academy of sciencesKunming 650201China school of life sciences yunnan universityKunming 650200China

Vespicochory, seed dispersal by hornets, is a rare seed dispersal mechanism in angiosperms and, to date, there are few records of this *** field investigations and behavioral assays conducted in four populations of Stemona tuberosa from 2011–2016, we demonstrate that hornets are the primary seed dispersers of S. tuberosa and play an important role in "long-distance" seed dispersal in this species. Furthermore, some ant species act as secondary dispersers and may transport the seeds to safe *** and ants provide complementary seed dispersal at different spatial scales. This unique example of insect-plant mutualism may be an underestimated but important strategy to ensure "long-distance" seed dispersal in other myrmecochorous plants.

关键词： Seed dispersal by hornets An unusuainsect-plant mutualism

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Description of a new species of Neochalcis(Hymenoptera:Chalcidoidea) reared from pupa of Byasa daemonius(Alphéraky) in yunnan, China

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Entomotaxonomia 2017年第2期39卷 133-139页

作者：周诗语陈高肖晖沈阳师范大学生命科学学院辽宁沈阳110034 中国科学院动物研究所动物进化与系统学院级重点实验室北京100101 中国科学院昆明植物研究所云南昆明650204

Neochalcis daemonius Xiao, Chen ＆ Zhou sp. nov. （Hymenoptera： Chalcididae： Haltichellinae）, a new species reared from the pupa of Byasa daemonius （Alph6raky） on Aristolochia delavayi Franch. （Piperales： Arist... 详细信息

关键词： Chalcididae Neochalcis pupal parasite taxonomy

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The flip side of the coin:ecological function of the bee-hawking Asian hornet

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Integrative Zoology 2020年第2期15卷 156-159页

作者： Gao CHEN Zhiming ZHANG Guillaume CHOMICKI Weibang SUN yunnan key Laboratory for Integrative Conservation of Plant Species with Extremely Small Populations KunmingChina CAS key Laboratory for Plant Diversity and Biogeography of East Asia Kunming Institute of BotanyChinese Academy of SciencesKunmingChina Institute of Ecology and Geobotany School of Ecology and Environmental SciencesYunnan UniversityKunmingChina Department of Plant Sciences University of OxfordUK The Queen’s College High StreetOxfordUK

Biological invasions around the world have experienced an unprecedented increase over the past few decades as a result of global change,worldwide trade and human mobility(Mack et al.2000).Invasive species have serious ecological and economic impacts across the *** the areas with high levels of invasion,Europe faces the greatest biological invasion(van Kleunen et al.2015).The European Union commissioned a report on invasive alien species to assess their ecological and economic ***,the Asian bee-hawking hornet Vespa velutina Lepeletier,1836 is in the line of fire in Europe(Rome&Villemant 2016).This hornet species is known as a serious predator of pollinators(such as honeybees),thus severely affecting insect pollination as well as apiculture in various European countries(Villemant et al.2011).

关键词： invasion king function

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