检索结果-南通市图书馆

Improving Ultraviolet Stability of Perovskite Solar Cells via Singlet Fission down-conversion

Chinese Journal of Chemistry 2023年第9期41卷 1057-1065页

作者： Yanda zhang Shuqin Xiao Wangping Sheng Jia Yang Licheng Tan Yiwang Chen College of Chemistry and Chemical Engineering Nanchang University999 Xuefu AvenueNanchangJiangxi 330031China Institute of Polymers and Energy Chemistry Nanchang University999 Xuefu AvenueNanchangJiangxi 330031China National Engineering Research Center for Carbohydrate Synthesis/Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education Jiangxi Normal University99 Ziyang AvenueNanchangJiangxi 330022China Peking University Yangtze Delta Institute of Optoelectronics NantongJiangsu 226010China School of Physics and Materials Science Nanchang University999 Xuefu AvenueNanchangJiangxi 330031China

The instability of perovskite materials under continuous ultraviolet(UV)light irradiation and high sensitivity in humid environments remain obstacles to future commercialization.Especially,the photovoltaic performance of perovskite solar cells(PVSCs)is prone to decline under UV light exposure for sustained periods of time.However,in conventional methods,preventing UV light from entering PVSCs usually comes at the expense of reducing short circuit photocurrent(Jsc).Herein,the UV stability of PVSCs is modified by in-troducing a singlet fission down-conversion layer 6,13-bis(triisopropylsilylethynyl)pentacene(TIPS-PEN)via one-step anti-solvent method without sacrificing device efficiency.The introduction of down conversion layer can not only improve the Jsc by converting UV light into multiple excitons,but also enhance the open-circuit voltage(Voc)owing to a better matched energy level alignment at the perovskite/spiro-OMeTAD interface.Consequently,the TIPS-PEN incorporated PVSCs attain the champion power conversion effi-ciency(PCE)up to 22.92%accompanied with dramatically increased UV photostability which can retain 80%of its primitive PCE un-der continuous UV light soaking for 150 h.Moreover,the unencapsulated PVSCs with TIPS-PEN exhibit remarkable moisture stability which can sustain over 80%of the initial value under air conditions(50%relative humidity,25℃)after 1000 h.

关键词： Perovskite solar cells down-conversion Singlet fission Ultraviolet light stability Synergetic effect Antisolvent Perovskites passivation

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

A mini-review on rare-earth down-conversion nanoparticles for NIR-II imaging of biological systems

引用

Nano Research 2020年第5期13卷 1281-1294页

作者： Yeteng Zhong Hongjie Dai Department of Chemistry Stanford UniversityStanfordCalifornia 94305USA

Rare-earth(RE)based luminescent probes exhibit rich optical properties including upconversion and down-conversion luminescence spanning a broad spectral range from 300 to 3,000 nm,and have generated great scientific and practical interest from telecommunication to biological imaging.While upconversion nanoparticles have been investigated for decades,down-conversion luminescence of RE-based probes in the second near-infrared(NIR-II,1,000-1,700 nm)window for in vivo biological imaging with sub-centimeter tissue penetration and micrometer image resolution has come into light only recently.In this review,we present recent progress on RE-based NIR-II probes for in vivo vasculature and molecular imaging with a focus on Er3+-based nanoparticles due to the down-conversion luminescence at the long-wavelength end of the NIR-II window(NIR-IIb,1,500-1,700 nm).Imaging in NIR-IIb is superior to imaging with organic probes such as ICG and IRDye800 in the^800 nm NIR range and the 1,000-1,300 nm short end of NIR-II range,owing to minimized light scattering and autofluorescence background.Doping by cerium and other ions and phase engineering of Er^3+-based nanoparticles,combined with surface hydrophilic coating optimization can afford ultrabright,biocompatible NIR-IIb probe towards clinical translation for human use.The Nd^3+-based probes with NIR-II emission at 1,050 and 1,330 nm are also discussed,including Nd^3+doped nanocrystals and Nd^3+-organic ligand complexes.This review also points out future directions for further development of multi-functional RE NIR-II probes for biological imaging.

关键词： rare earth down-conversion near-infrared biological imaging

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Visible-light emission properties of α-TeO_2:Ho^(3+)/Yb^(3+)/Eu^(3+) nanoparticles via both up-and down-conversion modes

引用

Journal of Rare Earths 2016年第11期34卷 1069-1076页

作者：张遥范国康胡辉陈伟龙白燕 Department of Chemistry Jinan University

In this study,α-TeO2：Ho3＋/Yb3＋,α-TeO2：Eu3＋ andα-TeO2：Ho3＋/Yb3＋/Eu3＋ nanoparticles were prepared via a simple hydrothermal process. The up- and down-conversion properties of the as-prepared nanoparticles were tested at room temperature un-der a near-infrared photo source （980 nm） and UV-vis photo source, respectively.The results indicated thatα-TeO2 NPs were a kind of outstanding host material for both up- and down-conversion luminescence. Theα-TeO2：Ho3＋/Yb3＋nanoparticles showed sharp up-conversion emission at 545 and 660 nm under 980 nm excitation, ascribed to the5S2→5I8 and5F5→5I8（Ho3＋） transitions, and weaker down-conversion emission at 545 nm under 455 nm excitation, ascribed to the5S2→5I8（Ho3＋） transitions. Theα-TeO2：Eu3＋nanoparticles showed strong down-conversion emission at 592 and 615 nm under 395 nm excitation, attributed to the5D0→7F1 and 5D0→7F2 （Eu3＋） transitions. Possessing the advantages of these two luminescent materials, the as-prepared tri-doped samples ofα-TeO2：0.5Ho3＋/10Yb3＋/3Eu3＋（mol.%）nanoparticles could successfully emit visible light via both up- and down-conversion modes.

关键词： up-conversion down-conversion luminescence α-TeO2 nanoparticles rare earths

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Efficient Near-infrared down-conversion Phosphor of Ce^(3+)/Yb^(3+)Co-doped La3Ga5SiO14 and Its Spectral Structural Modulation

引用

Chinese Journal of Structural Chemistry 2021年第9期40卷 1194-1204,1110页

作者：虞万军龚兴红秦皓然 College of Chemistry Fuzhou UniversityFuzhou 350116China Key Laboratory of Optoelectronic Materials Chemistry and Physics Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou 350108China

A series of near-infrared(NIR)down-conversion phosphors of La_(3)Ga_(5)SiO_(14)(LGS):Ce^(3+)/Yb^(3+)were synthesized via high-temperature solid-state reaction.Under excitation at 345 nm,the phosphors show strong NIR emission around 978 nm,which matches well with the optimal spectral response of crystalline silicon(c-Si)solar cells.The emission spectra and decay curves were used to demonstrate the energy transfer from Ce^(3+)to Yb^(3+).The energy transfer mechanism was discussed in detail,indicating that the energy transfer from Ce^(3+)to Yb^(3+)is dominated by a single photon process,and the energy transfer efficiency is up to 51%.In addition,La_(3)Ga_(5-z)Al_(2)SiO_(14)(z=0,1,2,3):Ce^(3+)/Yb^(3+)were also synthesized.The NIR emission intensity of La_(3)Ga_(2)Al_(3)SiO_(14):1%Ce^(3+)/5%Yb^(3+)is 4.6 times that of LGS:1%Ce^(3+)/5%Yb^(3+),and the thermal relaxation was used to explain this phenomenon.The results show that La_(3)Ga_(5-z)Al_(2)SiO_(14)(z=0,1,2,3):1%Ce^(3+)/5%Yb^(3+)phosphors have the potential to increase the conversion efficiency of c-Si solar cells.

关键词： Ce^(3+)/Yb^(3+) down-conversion phosphor ions substitution solar cells

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

down-conversion materials for organic solar cells:Progress,challenges,and perspectives

Aggregate

引用

Aggregate 2022年第3期3卷 59-79页

作者： Ram Datt Swati Bishnoi Harrison Ka Hin Lee Sandeep Arya Sonal Gupta Vinay Gupta Wing Chung Tsoi Faculty of Science and Engineering Sustainable Product Engineering Centre for Innovative Functional Industrial CoatingsSwansea UniversityBay CampusFabian WaySwansea SA18ENUK Advanced Materials and Metrology Division Council of Scientific And Industrial Research-National Physical LaboratoryDr.K.S.Krishnan MargNew Delhi 110012India Department of Physics University of JammuJammuJammu and Kashmir 180006India Department of Conducting Polymers Institute of Macromolecular ChemistryCzech Academy of SciencesPrague 616206Czech Republic Department of Physics Khalifa University of Science and TechnologyP.O.Box 127788Abu DhabiUnited Arab Emirates

Organic solar cells(OSCs)in terms of power conversion efficiency(PCE)and operational lifetime have made remarkable progress during the last decade by improving the active layer materials and introducing new interlayers.The newly developed wide bandgap organic donor and low bandgap acceptor molecules covered the absorption from the visible to the near-infrared region.Whereas the incident high energy region(UV)is not in favor of OSCs.Its absorption causes thermalization losses and photoinduced degradation,which hinders the PCE and lifetime of OSCs.Recently,lanthanide and non-lanthanide-based down-conversion(DC)materials have been introduced,which can effectively convert the high-energy photons(UV)to low-energy photons(visible)and resolve the spectral mismatch losses that limit the absorption of OSCs in high energy incident spectrum.Furthermore,the DC materials also protect the OSCs from UV-induced degradation.The DC materials were also proposed to cross the Shockley-Queisser efficiency limit of the solar cell.In this review,the need for DC materials and their processing method for OSCs have been thoroughly discussed.However,the main emphasis has been given to developing lanthanides and non-lanthanides-based DC materials for OSCs,their applications,and their impact on photovoltaic device performance,stability,and future perspectives.

关键词： down-conversion down-shifting lanthanides organic solar cells photostability

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Efficient Near-infrared down-conversion Phosphor of Ce;/Yb;Co-doped La;Ga;SiO;and Its Spectral Structural Modulation

引用

Chinese Journal of Structural Chemistry 2021年

作者：虞万军龚兴红秦皓然 CollegeofChemistry，FuzhouUniversity KeyLaboratoryofOptoelectronicMaterialsChemistryandPhysics，FujianInstituteofResearchontheStructureofMatter，ChineseAcademyofSciences FujianScience&TechnologyInnovationLaboratoryforOptoelectronicInformationofChina

A series of near-infrared （NIR） down-conversion phosphors of La;Ga;SiO;（LGS）:Ce;/Yb;were synthesized via high-temperature solid-state reaction. Under excitation at 345 nm， the phosphors show strong NIR emission around 978 nm， which matches well with the optimal spectral response of crystalline silicon （c-Si） solar cells. The emission spectra and decay curves were used to demonstrate the energy transfer from Ce;to Yb;. The energy transfer mechanism was discussed in detail， indicating that the energy transfer from Ce;to Yb;is dominated by a single photon process， and the energy transfer efficiency is up to 51%. In addition， La;Ga;Al;SiO;（z = 0， 1， 2， 3）:Ce;/Yb;were also synthesized. The NIR emission intensity of La;Ga;Al;SiO;:1%Ce;/5%Yb;is 4.6 times that of LGS:1%Ce;/5%Yb;， and the thermal relaxation was used to explain this phenomenon. The results show that La;Ga;Al;SiO;（z = 0， 1， 2， 3）:1%Ce;/5%Yb;phosphors have the potential to increase the conversion efficiency of c-Si solar cells.

关键词： Ce /Yb down-conversion phosphor ions substitution solar cells

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Energy transfer and luminescent properties of Tb^(3+)and Tb^(3+),Yb^(3+)doped CNGG phosphors

引用

Journal of Rare Earths 2022年第9期40卷 1445-1453,I0004页

作者： S.Hau G.Stanciu D.Avram L.Gheorghe C.Gheorghe National Institute for Laser Plasma and Radiation PhysicsSolid State Quantum Electronics Laboratory409 Atomistilor StreetP.O.Box MG-36Magurele077125IlfovRomania

In this work,calcium niobium gallium garnet(Ca_(3)Nb_(1.6875)Ga_(3.1875)O_(12)-CNGG)ceramic samples singledoped with Tb^(3+)and co-doped with Tb^(3+)and Yb^(3+)ions were sintered by the solid-state reaction method.The structural characterization of the samples was carried out by X-ray diffraction measurements.The optimal concentration of Tb^(3+)ions corresponding to the maximum luminescence in the green spectral range in CNGG:x at%Tb(x=0.1,0.5,1,2,3,4,and 5)was determined to be 4 at%.The timeresolved luminescence of the^(5)D_(4)level(Tb^(3+))in the CNGG:x at%Tb samples was analysed to explore the quenching mechanisms involved in the Tb^(3+)green emission.Co-doped CNGG:4 at%Tb,y at%Yb(y=0.5,2,4,6,8,and 10)ceramics were prepared and investigated.It is shown that CNGG:4 at%Tb,y at%Yb phosphors exhibit intense green luminescence under ultra-violet(UV),visible(VIS),and near-infrared(NIR)excitation,thus demonstrating the presence of simultaneous down-conversion(DC)and upconversion(UC)processes.The dependence of the UC luminescence intensity on the diode laser pumping power was measured and the results indicate a two-photon process based on cooperative energy transfer(CET).Under UV excitation,the lifetime of the^(5)D_(4)(Tb^(3+))level slowly increases with increase of Yb^(3+)concentration,suggesting the energy transfer from Yb^(3+)to Tb^(3+)ions,while under NIR excitation,the lifetime of the^(5)D_(4)(Tb^(3+))level decreases with increase of Yb^(3+)ions concentration,indicating the presence of a strong energy transfer from Tb^(3+)to Yb^(3+)ions.The highest energy transfer efficiency ofη_(ET)≈42%was determined for the CNGG:4 at%Tb,10 at%Yb sample.The obtained results indicate that CNGG:(Tb^(3+),Yb^(3+))could be efficient new yellowish-green-emitting phosphors.

关键词： Phosphors Tb^(3+)and Tb^(3+)-Yb^(3+)luminescence properties Up-conversion down-conversion Quantum cutting process Rare earths

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Application of SrAl_2O_4:Eu^(2+) down–conversion Powder in Flexible Dye–Sensitized Solar Cells

引用

Journal of the Chinese Ceramic Society 2015年第2期 103-110页

作者： WANG Lijun LI Yueying HAO Hongshun GUO Weihua SU Qing JIN Shanshan QIN Lei GAO Wenyuan LIU Guishan HU Zhiqiang Department of Inorganic Nonmetallic Materials Engineering Dalian Polytechnic University Liaoning Provincial College Key Laboratory of New Materials and Material Modification Dalian Polytechnic University National Engineering Research Center of Seafood Dalian Polytechnic University

TiO2 nanotube(NT) was firstly prepared on titanium foil by an electrochemical anodization method, and then modified via subsequent deposition of a layer of SrAl2O4:Eu2+ phosphor embedded within TiO2 nanoparticles to fabricate photoanodes of dye–sensitized solar cells(DSSCs). The effect of doping down–conversion Sr Al2O4:Eu2+ phosphor in DSSCs was investigated. SrAl2O4:Eu2+ can effectively convert ultraviolet light to visible light within the range of the dye commonly used in DSSC to increase the photocurrent of DSSC, and enhance the open–circuit voltage by a p–type doping effect. When the ratio of Sr Al2O4:Eu2+ in the doping layer is optimized to be 1wt.%, the photoelectric conversion efficiency of the DSSC reaches 3.09%, which is increased by 38.6%, compared to that of the DSSC without Sr Al2O4:Eu2+ doping.

关键词： dye–sensitized solar cells TiO2 nanotube down-conversion luminescence p-type doping

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Optical performance study of Sr_2ZnSi_2O_7:Eu^(2+),Dy^(3+), SrAl_2O_4:Eu^(2+),Dy^(3+) and Y_2O_2S:Eu^(3+),Mg^(2+),Ti^(4+) ternary luminous fiber

引用

Journal of Rare Earths 2016年第12期34卷 1206-1212页

作者：晋阳龙啸云朱亚楠葛明桥 School of Textile and Clothing Jiangnan University

In this study, down-conversion fluorescent powder of Sr2ZnSi2O7：Eu-（2＋）,Dy-（3＋）, SrAl2O4：Eu-（2＋）,Dy-（3＋） and Y2O2S：Eu-（3＋）,Mg-（2＋）,Ti-（4＋）, which were the common three primary colors materials with long afterglow, were synthesized by high temperature solid state method. The blends of rare earth（RE） luminescent materials have been of interest to reinvest the luminescent characteristics of polyethylene terephtahalate（PET） luminous fiber. The scanning electron microscopy（SEM） and an inversion fluorescence microscope were used to characterize the surface morphology and the dispersion of inclusion. Through analysis of microcosmic morphology, three typical dispersions of luminescent particles were summarized. The X-ray diffraction indicated that the phase structure of fiber samples and crystal structure of luminescence materials kept complete after prilling and spinning. From the fluorescence spectra and CIE 1931 coordinates, it could be found that different combinations of luminous fibers were desired to obtain divers colors emission luminous fiber. And the fiber samples were a light sensation which could induct different excitation wavelengths and convert it down to different colors. The afterglow decay curve and its differential curve were summarized indicating the three decay stages. The decay curve and decay rate curve showed that the contents of Sr2ZnSi2O7：Eu-（2＋）,Dy-（3＋）, SrAl2O4：Eu-（2＋）,Dy-（3＋） and Y2O2S：Eu-（3＋）,Mg-（2＋）,Ti-（4＋） had obvious influence on the afterglow of fiber samples.

关键词： luminous fiber Sr_2ZnSi_2O_7：Eu^2＋ Dy^3＋ SrAl_2O_4：Eu^2＋ Dy^3＋ Y_2O_2S：Eu^3＋ Mg^2＋ Ti^4＋ down-conversion light sensation rare earths

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Researches in microwave photonics based packages for millimeter wave system with wide bandwidth and large dynamic range

引用

Frontiers of Optoelectronics 2016年第2期9卷 186-193页

作者： Xiaoping ZHENG Shangyuan LI Hanyi ZHANG Bingkun ZHOU Deptartrnent of Electronic Engineering Tsinghua University Beijing 100084 China

This paper presents an introduction to the researches in microwave photonics based packages and its application, a 973 project （No. 2012CB315600）, which focuses on addressing new requirements for millimeter wave （MMW） system to work with higher frequency, wider bandwidth, larger dynamic range and longer distance of signal distribution. Its key scientific problems, main research contents and objectives are briefed, and some latest achievements by the project team, including generation of linear frequency modulation wave （LFMW）, tunable optoelectronic oscillator （OEO） with lower phase noise, reconfigurable filter with higher Q value, time delay line with wider frequency range, down conversion with gain, and local oscillator （LO） transmission with stable phase, are introduced briefly.

关键词： linear frequency modulation wave （LFMW）generation tunable optoelectronic oscillator （OEO） recon-figurable filter time delay line down-conversion phasestable transmission

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：