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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)

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

Effect of Geometric Variation of Root Fillet on the Flow Characteristic of a Transonic Compressor Rotor

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Journal of Thermal Science 2023年第4期32卷 1407-1420页

作者： CUI Weiwei liu yuqiang liu Fusong YANG Laishun LI Longting YAO Fei WANG Xinglu WANG Cuiping College of Civil Engineering and Architecture Shandong University of Science and TechnologyQingdao266590China Institute of Engineering Thermophysics Chinese Academy of SciencesBeijing100190China Clean energy laboratory Shandong University of Science and TechnologyQingdao266590China

The effects of root fillet on the flow behavior of high loading compressor rotor tends to be much more crucial in practice,and it’s necessary to explore the internal relations between the geometric effects of root fillet and the flow behaviors of rotor ***,eight types of root fillet with different radius were designed and installed around the blade root of NASA *** the aids of fillet,the corner separation near suction side of blade root has been suppressed significantly in that the root fillet reconstructs the circumferential bending distributon of the suction-side curve from leading edge to trailing edge,and reduces the genmetric turning angle in the latter part of root section near trailing ***,apart from the improvement of corner flow characteristic caused by root fillet,both the tip flow deterioration and the decrease of stall margin occur in the new rotors,which indicates an indirect correlation between tip flow characteristic and root fillet exists indeed in the three-dimensional flowfields of transonic ***,by means of the new radial pressure equilibrium affected by root fillet,a larger radius of root fillet contributes to much larger blade loading and stronger leakage flow in tip region of compressor *** a result,a monotonic decrease of stall margin was present in the transonic rotor with increase of the root fillet ***,the positive bending of blade tip was introduced to deal with the negative effect caused by the root fillet *** with the effects of root fillet and positive tip-bending on the radial pressure equilibrium existing in channels,both the radial and streamwise loading distributions tend to be much more reasonable in new rotors,and the static pressure difference in former 1/3 chord of blade tip has decreased clearly which benefits to reduce the strength of leakage flow in tip ***,the flow deterioration in tip region of transonic rotor induced by root fillet ha

关键词： root fillet variation corner separation radial pressure equilibrium stall margin positive tip-bending

Effects of Width Variation of Pressure-Side Winglet on Tip Flow Structure in a Transonic Rotor

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Journal of Thermal Science 2022年第1期31卷 141-150页

作者： CUI Weiwei WANG Xinglu YAO Fei ZHAO Qingjun liu yuqiang liu Leinan WANG Cuiping YANG Laishun College of Civil Engineering and Architecture Shandong University of Science and TechnologyQingdao 266590China Institute of Engineering Thermophysics Chinese Academy of SciencesBeijing 100190China School of Aeronautics and Astronautics University of Chinese Academy of SciencesBeijing 100049China Key Laboratory of Light-duty Gas-turbine Chinese Academy of SciencesBeijing 100190China Key Laboratory of Civil Engineering Disaster Prevention and Mitigation of Shandong Province Qingdao 266590China Clean Energy Laboratory Shandong University of Science and TechnologyQingdao 266590China

Tip leakage flow has become one of the major triggers for rotating stall in tip region of high loading transonic compressor *** with active flow control method,it’s wise to use blade tip modification to enlarge the stable operating range of ***,three pressure-side winglets with the maximum width of 2.0,2.5 and 3.0 times of the baseline rotor,are designed and surrounded the blade tip of NASA rotor 37,and the three new rotors are named as RPW1,RPW2,and RPW3 *** numerical results show that the width of pressure-side winglet has significant influence on the stall margin and the minimum throttling massflow of rotor,while it produces less effect on the choking massflow and the peak efficiency of new *** the width of the pressure-side winglet increases from new rotor RPW1 to RPW3,the strength of leakage massflow has been attenuated dramatically and a reduction of 20%in leakage massflow rate has appeared in the new rotor *** contrast,the extended blade tip caused by winglet has not introduced much more aerodynamic losses in tip region of rotor,and the new rotors with different width of pressure-side winglet have the similar peak efficiency to the *** new shape of the leakage channel over blade tip which replaces of the static pressure difference near blade tip has dominated the behavior of the leakage flow in tip *** both the new aerodynamic boundary and throat in tip gap have reshaped by the low-velocity flow near the solid wall of extended blade tip,the discharging velocity and massflow rate of leakage flow have been suppressed obviously in new *** addition,the increasing inlet axial velocity at the entrance of new rotor has increased slightly as well,which is attributed to the less blockage in the tip region of new *** consideration of the increased inlet axial velocity and the weakened leakage flow,the new rotor presents an appropriately linear increase of the stall margin when the width of pressure-

关键词： pressure-side winglet blade tip aerodynamic losses leakage channel stall margin

A Facile Synthetic Approach to 3-Halo-4-substituted-l,5-dihydro-4H-1,2,4-triazoline-5-thiones Based on Retro-Michael Addition

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Chemical Research in Chinese Universities 2017年第4期33卷 587-593页

作者： TIAN He liu yuqiang LI Xingwei XIE Yafei liu Changying WANG Jianwu ZHAO Guilong School of Chemistry and Chemical Engineering Shandong University Jinan 250100 P. R. China Eanjin Key Laboratory of Molecular Design and Drug Discovery Eanjin Institute of Pharmaceutical Research Tianjin 300193 P. R. China

A facile 3-step synthetic approach to 3-halo-4-substituted-l,5-dihydro-4H-1,2,4-triazolme-5-thiones （la--lk） from corresponding unhalogenated 8a---8i was developed based on the strategy of retro-Michael addition, with the key steps being regioselective S-alkylation of compounds 8a-8i with ethyl 3-iodopropionate（12c） and alkaline cleavage of the propionate protecting group via retro-Michael addition. The synthetic approach was characterized by simplicity of operation and wide substrate scope.

关键词： Synthetic approach Protecting group Triazole Halogenation Regioselectivity Retro-Michael addition

Effect of Polymer Chain Regularity on the Photovoltaic Performance of Organic Solar Cells

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Chinese Journal of Polymer Science 2022年第8期40卷 996-1002,I0012页

作者： Hang Wang Hao Lu Ya-Nan Chen Andong Zhang yuqiang liu Cai’e Zhang Yahui liu Xinjun Xu Zhishan Bo College of Textiles&Clothing State Key Laboratory of Bio-fibers and Eco-textilesQingdao UniversityQingdao266071China Beijing Key Laboratory of Energy Conversion and Storage Materials College of ChemistryBeijing Normal UniversityBeijing100875China College of Materials Science and Engineering Shenzhen UniversityShenzhen518060China

In this work,regio-regular and random polymers(reg-PTF and ran-PTF)comprising benzodithiophene and 3-fluorothiophene units are developed to investigate the influence of polymer chain regularity on the photovoltaic ***,reg-PTF exhibits higher HOMO energy level(∼0.2 eV)than that of ran-PTF due to the more ordered molecular structure and higher *** the result,the HOMO energy level offset between donor and acceptor can be well controlled by selecting different *** BTP-ec9-4F with a much deep HOMO energy level as acceptor,reg-PTF-based devices display an inferior PCE of 7.66%compared with ran-PTF based ones(11.78%)due to the too large HOMO energy levels *** blending with Y18-1F,the PCE of reg-PTF-based devices is increased to 13.23%due to the appropriate energy *** comparison,the ran-PTF-based devices nearly do not work because of the negative HOMO energy levels *** work indicates that both the polymer chain regularity and the energy level offset between the donor and acceptor material are important to the performance of organic solar cells.

关键词： Organic solar cells Polymer donor Regio-regular polymer Random polymer Energy level offset

Black phosphorus induced photo-doping for high-performance organic-silicon heterojunction photovoltaics

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Nano Research 2017年第11期10卷 3848-3856页

作者： Zhouhui Xia Pengfei Li yuqiang liu Tao Song Qiaoliang Bao Shuit-Tong Lee Baoquan Sun Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices Institute of Functional Nano and Soft Materials(FUNSOM)Soochow University Suzhou 215123 China Department of Materials Science and Engineering Monash University Clayton Victoria 3800 Australia

In conventional crystalline silicon （Si） homojunction solar cells,a strategy of doping by transporting phosphorus or boron impurities into Si is commonly used to build Ohmic contacts at rear ***,this technique involves an energy intensive,high temperature （～ 800 ℃） process and toxic doping *** phosphorus （BP） is a two-dimensional,narrow bandgap semiconductor with high carrier mobility that exhibits broad light harvesting ***,we place BP：zinc oxide （ZnO） composite films between Si and aluminum （Al） to improve their *** the BP harvests photons with energies below 1.1 eV from the crystalline Si,the ZnO carrier concentration increases dramatically due to charge *** photo-induced doping results in a high carrier concentration in the ZnO film,mimicking the modulated doping technique used in semiconductor *** show that photo-induced carriers dramatically increase the conductivities of the BP-modified ZnO films,thus reducing the contact resistance between Si and Al.A photovoltaic power conversion efficiency of 15.2% is achieved in organic-Si heterojunction solar cells that use a ZnO：BP *** findings demonstrate an effective way of improving Si/metal contact via a simple,low temperature process.

关键词： black phosphorus zinc oxide light induced dopant photovoltaics

Design, Synthesis and Biological Activity of Tetrazole-bearing Uric Acid Transporter 1 Inhibitors

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Chemical Research in Chinese Universities 2017年第1期33卷 49-60页

作者： CAI Wenqing liu Wei XIE Yafei WU Jingwei liu yuqiang liu Changying XU Weiren TANG Lida WANG Jianwu ZHAO Guilong School of Chemistry and Chemical Engineering Shandong University Jinan 250100 P. R. China Tianjin Key Laboratory of Molecular Design and Drug Discovery Tianjin Institute of Pharmaceutical Research Tianjin 300193 P. R. China

Systematic structure-activity relationship（SAR） exploration of a moderately active tetrazole-bearmg lesinurad-based hit If led to the discovery of a potent uric acid transporter I（URAT1） inhibitor li, which possessed a novel molecular skeleton and was 11-fold more potent than the parent lesinurad against human URAT1 in-vitro （IC50=0.66 gmol/L for li vs. 7.18 μmol/L for lesinurad）.

关键词： URAT1 inhibitor Structure-activity relationship Drug discovery Lesinurad Tetrazole Bioisostere

3-Oxodapagliflozin as a Potent and Highly Selective SGLT2 Inhibitor for the Treatment of Type 2 Diabetes

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Chemical Research in Chinese Universities 2014年第5期30卷 785-793页

作者： ZHANG Shuo WANG Yuli liu Wei XIE Yafei liu yuqiang XU Weiren TANG Lida WANG Jianwua ZHAO Guilong School of Chemistry and Chemical Engineering Shandong University Jinan 250100 P. R. China Tianjin Key Laboratory of Molecular Design and Drug Discovery Tianjin Institute of Pharmaceutical Research Tianjin 300193 P. R. China

Structural modifications of 3-OH in the glucose moiety of dapagliflozin（1）, an approved potent sodium-dependent glucose transporter 2（SGLT2） inhibitor, led to 3-oxodapagliflozin（16）, a highly potent and more selective SGLT2 inhibitor[IC50（hSGLT1）/IC50（hSGLT2）=2851 for compound 16 vs. 843 for compound 1]. 3-Oxodapagliflozin（16） exhibited in vitro（IC50=1.0nmol/L against hSGLT2 for compound 16 vs. 1.3 nmol/L for compound 1） and in vivo activities comparable to those of dapagliflozin（1）. The bioactivities of 3-oxodapagliflozin （16） warrant its further evaluation as a promising SGLT2 inhibitor for the treatment of type 2 diabetes.

关键词： SGLT2 inhibitor Structure-activity relationship Dapagliflozin