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CsPbBr_(x)I_(3-x)thin films with multiple ammonium ligands for low turn-on pure-red perovskite light-emitting diodes

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Nano Research 2021年第1期14卷 191-197页

作者： Maowei Jiang Zhanhao Hu luis k.ono Yabing Qi Energy Materials and Surface Sciences Unit(EMSSU) Okinawa Institute of Science and Technology Graduate University(OIST)1919-1 TanchaOnna-sonOkinawa 904-0495Japan

All-inorganic α-CsPbBr_(x)I_(3-x)perovskites featuring nano-sized crystallites show great potential for pure-red light-emitting diode(LED)***,the CsPbBr_(x)I_(3-x)LEDs based on nano-sized α-CsPbBr_(x)I_(3-x)crystallites have been fabricated mainly via the classical colloidal route including a tedious procedure of nanocrystal synthesis,purification,ligand or anion exchange,film casting,*** the usually adopted conventional LED device structure,only high turn-on voltages(>2.7)have been achieved for CsPbBrxl3-x ***,this mix-halide system may suffer from severe spectra-shift under *** this report,CsPbBr_(x)I_(3-x)thin films featuring nano-sized crystallites are prepared by incorporating multiple ammonium ligands in a one-step spin-coating *** multiple ammonium ligands constrain the growth of CsPbBr_(x)I_(3-x)*** CsPbBr_(x)I_(3-x)thin films benefit from quantum *** corresponding CsPbBr_(x)I_(3-x)LEDs,adopting a conventional LED structure of indium-doped tin oxide(ITO)/poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)(PEDOT:PSS)/CsPbBr_(x)I_(3-x)/[6,6]-phenyl C61 butyric acid methyl ester(PCBM)/bathocuproine(BCP)/AI,emit pure-red color at Commission Internationale de I'eclairage(CIE)coordinates of(0.709,0.290),(0.711,0.289),etc.,which represent the highest color-purity for reported pure-red perovskite LEDs and meet the Rec.2020 requirement at CIE(0.708,0.292)very *** CsPbBr_(x)I_(3-x)LED shows a low turn-on voltage of 1.6 V,maximum external quantum efficiency of 8.94%,high luminance of 2,859 cd·m^(-2),and good color stability under bias.

关键词： CsPbBr_(x)I_(3-x)thin film nano-sized crystallites surface termination pure-red color perovskite light-emitting diode low turn-on voltage

Organic additive engineering toward efficient perovskite light-emitting diodes

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InfoMat 2020年第6期2卷 1095-1108页

作者： Yuqiang Liu luis k.ono Yabing Qi Energy Materials and Surface Sciences Unit(EMSSU) Okinawa Institute of Science and Technology Graduate University(OIST)OkinawaJapan

Perovskite materials with excellent optical and electrical properties are promising for light-emitting *** the field of perovskite light-emitting diodes(PeLEDs),organic materials additive engineering has been proved to be an effective scheme for enhancing efficiency and stability in *** impressively,the reported external quantum efficiency of PeLEDs based on perovskite-organic composite has reached over 20%.Herein,we will review the important progress of the organic materials'additive-modified PeLEDs and discuss the remaining problems and challenges and the key research direction in the near future.

关键词： perovskite light-emitting diodes organic additive stability

Up-Scalable Fabrication of SnO_(2)with Multifunctional Interface for High Performance Perovskite Solar Modules

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Nano-Micro Letters 2021年第10期13卷 200-213页

作者： Guoqing Tong luis kono Yuqiang Liu Hui Zhang Tongle Bu Yabing Qi Energy Materials and Surface Sciences Unit(EMSSU) Okinawa Institute of Science and Technology Graduate University(OIST)1919-1 TanchaOnna-sonKunigami-gunOkinawa 904-0495Japan

Tin dioxide(SnO_(2))has been demonstrated as one of the promising electron transport layers for high-efficiency perovskite solar cells(PSCs).However,scalable fabrication of SnO_(2) films with uniform coverage,desirable thickness and a low defect density in perovskite solar mod-ules(PSMs)is still ***,we report preparation of high-quality large-area SnO_(2) films by chemical bath depo-sition(CBD)with the addition of kMnO_(4).The strong oxidiz-ing nature of kMnO_(4) promotes the conversion from Sn(II)to Sn(VI),leading to reduced trap defects and a higher carrier mobility of SnO_(2).In addition,k ions diffuse into the per-ovskite film resulting in larger grain sizes,passivated grain boundaries,and reduced hysteresis of ***,Mn ion doping improves both the crystallinity and the phase stability of the perovskite *** a multifunctional interface engineering strategy enabled us to achieve a power conversion efficiency(PCE)of 21.70% with less hysteresis for lab-scale *** this method,we also fabricated 5×5 and 10×10 cm^(2) PSMs,which showed PCEs of 15.62% and 11.80%(active area PCEs are 17.26%and 13.72%),*** the encapsulated 5×5 cm^(2) PSM,we obtained a T80 operation lifetime(the lifespan during which the solar module PCE drops to 80%of its initial value)exceeding 1000 h in ambient condition.

关键词： Perovskites Solar modules Operational stability Interface passivation SnO_(2)

Derivative Phases Induced Growth of CsPbBr3 and Their Application in Optoelectronic Device

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Derivative Phases Induced Growth of CsPbBr3 and Their Applic...

Heterogeneous FASnI3 Absorber with Enhanced Electric Field for High-Performance Lead-Free Perovskite Solar Cells

第二届全国太阳能电池材料与器件大会

作者：童国庆 luis k.ono Yang Jiang Yabing Qi 合肥工业大学 Energy Materials and Surface Sciences Unit (EMSSU) Okinawa Institute of Science and Technology Graduate University (OIST) School of Materials Science and Engineering Hefei University of Technology

Inorganic halide perovskite materials Cs PbX (X=Cl,Br,and I) have attracted great attention because of their applications in solar cells,light emitting diodes(LEDs),lasers,and photodetectors (PDs).CsPbBr perovskite has shown great potential in the field of optoelectronics because of its superior tolerance to the moisture,light,heat and/or *** 3D-CsPbBr,two kinds derivative phases of 2D-CsPbBr and 0D-CsPbBrhave been synthesized by controlling the chemical ratio of precursor materials of CsBr and *** phase transition from the derivative phases to Cs PbBr phase can effectively release the stress concentration in the perovskite films,which results in an improved film quality and high efficiency solar ***,the 2D layered structure of CsPbBr can also serve as a template,which makes the intermediate product of CsBr MWs possible to grow along the CsPbBr template,leading to forming the CsPbBr *** high-performance CsPbBr arrays photodetector is achieved with high responsivity and long-term *** addition,the CsPbBr inorganic perovskite LED is constructed by employing the PbBr stock solution based on the Cd-doping CsPb(Br/Cl) QDs to realize the sky-blue emitting perovskite quantum dot LEDs.

关键词： Inorganic perovskite CsPbBr3 derivative phase solar cells photodetectors light emitting diodes

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Nano-Micro Letters 2022年第6期14卷 234-247页

作者： Tianhao Wu Xiao Liu Xinhui Luo Hiroshi Segawa Guoqing Tong Yiqiang Zhang luis kono Yabing Qi Liyuan Han State key Laboratory of Metal Matrix Composites School of Material Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240People’s Republic of China Special Division of Environmental and Energy Science Komaba Organization for Educational Excellence(KOMEX)College of Arts and SciencesUniversity of TokyoTokyo 153-8902Japan Energy Materials and Surface Sciences Unit(EMSSU) Okinawa Institute of Science and Technology Graduate University(OIST)1919-1 TanchaOnna-sonKunigami-gunOkinawa 904-0495Japan School of Materials Science and Engineering Henan Institute of Advanced TechnologyZhengzhou UniversityZhengzhou 450001People’s Republic of China

Lead-free tin perovskite solar cells(PSCs)have undergone rapid development in recent years and are regarded as a promising ecofriendly photovoltaic ***,a strategy to suppress charge recombination via a built-in electric field inside a tin perovskite crystal is still *** the present study,a formamidinium tin iodide(FASnI;)perovskite absorber with a vertical Sn;gradient was fabricated using a Lewis base-assisted recrystallization method to enhance the built-in electric field and minimize the bulk recombination loss inside the tin ***-dependent X-ray photoelectron spectroscopy revealed that the Fermi level upshifts with an increase in Sn;content from the bottom to the top in this heterogeneous FASnI;film,which generates an additional electric field to prevent the trapping of photo-induced electrons and ***,the Sn;-gradient FASnI;absorber exhibits a promising efficiency of 13.82%for inverted tin PSCs with an open-circuit voltage increase of 130 mV,and the optimized cell maintains over 13%efficiency after continuous operation under 1-sun illumination for 1,000 h.

关键词： Gradient FASnI3 absorber Built-in electric field Bulk charge recombination Lead-free perovskite solar cell

The sexually dimorphic expression of glutamate transporters and their implication in pain after spinal cord injury

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Neural Regeneration Research 2025年第11期20卷 3317-3329页

作者： Jennifer M.Colón-Mercado Aranza I.Torrado-Tapias Iris k.Salgado Jose M.Santiago Samuel E.Ocasio Rivera Dina P.Bracho-Rincon luis H.Pagan Rivera Jorge D.Miranda Department of Physiology University of Puerto RicoMedical Sciences CampusSan JuanPRUSA National Institutes of Health National Human Genome Research InstituteBethesdaMDUSA Universidad Central del Caribe School of MedicineBayamónPRUSA University of Puerto Rico Carolina CampusCarolinaPRUSA Institute of Neurobiology San JuanPRUSA

In addition to the loss of motor function,~60% of patients develop pain after spinal cord *** cellular-molecular mechanisms are not well understood,but the data suggests that plasticity within the rostral,epicenter,and caudal penumbra of the injury site initiates a cellularmolecular interplay that acts as a rewiring mechanism leading to central neuropathic *** can lead to the formation of new connections triggering abnormal sensory *** excitatory glutamate transporters are responsible for the reuptake of extracellular glutamate which makes them a critical target to prevent neuronal hyperexcitability and *** previous studies showed a sexually dimorphic therapeutic window for spinal cord injury after treatment with the selective estrogen receptor modulator *** this study,we investigated the anti-allodynic effects of tamoxifen in male and female rats with spinal cord *** hypothesized that tamoxifen exerts anti-allodynic effects by increasing the expression of glutamate transporters,leading to reduced hyperexcitability of the secondary neuron or by decreasing aberrant *** and female rats received a moderate contusion to the thoracic spinal cord followed by subcutaneous slow-release treatment of tamoxifen or matrix pellets as a control(placebo).We used von Frey monofilaments and the“up-down method”to evaluate mechanical *** treatment decreased allodynia only in female rats with spinal cord injury revealing a sexdependent *** expression profile of glutamatergic transporters(excitatory amino acid transporter 1/glutamate aspartate transporter and excitatory amino acid transporter 2/glutamate transporter-1)revealed a sexual dimorphism in the rostral,epicenter,and caudal areas of the spinal cord with a pattern of expression primarily on *** rodents showed a significantly higher level of excitatory amino acid transporter-1 expression while male rodents showed increased

关键词： allodynia central neuropathic pain EAAT-1/GLAST EAAT-2/GLT-1 glutamate transporters selective estrogen receptor modulator sexual dimorphism spinal cord injury trauma

Up-Scalable Fabrication and Future Applications of Perovskite Solar modules

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Up-Scalable Fabrication and Future Applications of Perovskit...

A novel heterozygous SF1/NR5A1 gene variant causes 46,XY DSD-gonadal dysgenesis with hypergonadotropic hypogonadism without adrenal insufficiency

第九届新型太阳能材料科学与技术学术研讨会

作者： Guoqing Tong luis.k.ono Yabing Qi Hefei University of Technology Okinawa Institute of Science and Technology Graduate University (OIST)

The solar energy to electricity power conversion efficiency(PCE) of laboratory perovskite scale cells has been rapidly improved from 3.8% to nowadays 25.7% within a relatively short period of time(13 years). However, these state-of-the-art laboratory perovskite single cells have relatively small areas(kite solar modules(PSMs) with high PCE and stability.[1-3] The intermediate phase growth and pre-synthesized crystalline perovskite are proposed to improve the uniform and dense perovskite film as well as reduce the defects. Moreover, chemical bath deposition was introduced to upscale the electron transport layer of SnO2 in PSMs. On the basis of aforementioned strategies, the efficiency over 15% for 5×5 cm and 11% for 10×10 cm PSMs were achieved, respectively. Furthermore, the proof-of-concept integrated PSMLi-ion battery-LED device and plastic toy car powered by our PSM in outdoor environment were demonstrated.

关键词： Perovskite solar modules Upscalable fabrication Stability Interface SnO2

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Genes & Diseases 2024年第4期11卷 128-130页

作者： luis Ramos Department of Reproductive Biology Instituto Nacional de Ciencias Medicas y Nutricion Salvador ZubirdnTlalpanMexico City 14080Mexico

Steroidogenic factor 1(SF1/NR5A1;nuclear receptor subfamily 5 group A member 1)is an essential orphan protein involved in gonadal embryogenesis,sex determination,and reproductive endocrinology.

关键词： insufficiency determination gonadal

New frontiers on open standards for geo-spatial science

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Geo-Spatial Information Science 2017年第2期20卷 126-133页

作者： luis Bermudez Open Geospatial Consortium WaylandMAUSA

The process of sharing of data has become easier than ever with the advancement of cloud computing and software ***,big challenges remain such as efficient handling of big geospatial data,supporting and sharing of crowd sourced/citizen science data,integration with semantic heterogeneity,and inclusion of agile processes for continuous improvement of geospatial *** paper discusses the new frontiers regarding these challenges and the related work performed by the Open Geospatial Consortium,the world leading organization focused on developing open geospatial standards that“geo-enable”the Web,wireless,and location-based services and mainstream IT.

关键词： Open Geospatial Consortium(OGC) big data cloud computing open standards semantics linked data