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Self-assembled donor-acceptor hole contacts for inverted perovskite solar cells with an efficiency approaching 22%: The impact of anchoring groups

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Journal of Energy Chemistry 2022年第5期31卷 87-95页

作者： Qiaogan Liao Yang Wang Zilong Zhang Kun Yang Yongqiang Shi Kui Feng Bolin Li Jiachen Huang Peng Gao Xugang Guo Department of materials Science and Engineering Guangdong Provincial Key Laboratory of Functional Oxide Materials and DevicesSouthern University of Science and Technology(SUSTech)Shenzhen 518055GuangdongChina College of materials Fujian Key Laboratory of Advanced MaterialsXiamen UniversityXiamen 361005FujianChina CAS key laboratory of Design and Assembly of Functional Nanostructures Fujian Provincial Key Laboratory of NanomaterialsFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002FujianChina School of materials Science and Engineering Harbin Institute of TechnologyHarbin 150001HeilongjiangChina

Self-assembled molecules(SAMs) have shown great potential in replacing bulk charge selective contact layers in high-performance perovskite solar cells(PSCs) due to their low material consumption and simple processing. Herein, we design and synthesize a series of donor-acceptor(D-A) type SAMs(MPA-BTCA, MPA-BT-BA, and MPA-BT-RA, where MPA is 4-methoxy-N-(4-methoxyphenyl)-N-phenylaniline;BT is benzo[c][1,2,5]-thiadiazole;CA is 2-cyanoacrylic acid, BA is benzoic acid, RA is rhodanine-3-propionic acid) with distinct anchoring groups, which show dramatically different properties. MPA-BTCA with CA anchoring groups exhibited stronger dipole moments and formed a homogeneous monolayer on the indium tin oxide(ITO) surface by adopting an upstanding self-assembling mode. However, the MPA-BT-RA molecules tend to aggregate severely in solid state due to the sp~3 hybridization of the carbon atom on the RA group, which is not favorable for achieving a long-range ordered self-assembled ***, benefiting from high dipole moment, as well as dense and uniform self-assembled film,the device based on MPA-BT-CA yielded a remarkable power conversion efficiency(PCE) of 21.81%.Encouragingly, an impressive PCE approaching 20% can still be obtained for the MPA-BT-CA-based PSCs as the device area is increased to 0.80 cm^(2). Our work sheds light on the design principles for developing hole selecting SAMs, which will pave a way for realizing highly efficient, flexible, and large-area PSCs.

关键词： Self-assembled molecules Donor-acceptor backbones Hole contacts Perovskite solar cells Anchoring groups

Morphological, Mechanical and Thermal Properties of Poly(lactic acid)(PLA)/Cellulose Nanofibrils(CNF) Composites Nanofiber for Tissue Engineering

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Journal of Wuhan University of Technology(materials Science) 2019年第1期34卷 207-215页

作者： YANG Zhangqiang SI Junhui School of materials Science and Engineering Fuzhou University School of materials Science and Engineering Fujian University of Technology fujian provincial key laboratory of Advanced materials Processing and Application

Composite nanofiber membranes based on biodegradable poly(lactic acid)(PLA) and cellulose nanofibrils(CNF) were produced via electrospinning. The influence of CNF content on the morphology, thermal properties, and mechanical properties of PLA/CNF composite nanofiber membranes were characterized by field scanning electron microscopy(FE-SEM), differential scanning calorimetry(DSC), thermogravimetric analysis(TGA), and dynamic mechanical analysis(DMA), respectively. The results show that the PLA/CNF composite nanofibers with smooth, free-bead surface can be successfully fabricated with various CNF contents. The introduction of CNF is an effective approach to improve the crystalline ability, thermal stability and mechanical properties for PLA/CNF composite fibers. The Young's moduli and tensile strength of the PLA/CNF composite nanofiber reach 106.6 MPa and 2.7 MPa when the CNF content is 3%, respectively, which are one times higher and 1.5 times than those of pure PLA nanofiber. Additionally, the water contact angle of PLA/CNF composite nanofiber membranes decreases with the increase of the CNF loading, resulting in the enhancement of their hydrophilicity.

关键词： poly(lactic acid)(PLA) cellulose nanofibrils(CNF) electrospinning mechanical and thermal properties

Synthesis, Crystal Structure and Characterization of a New Zinc Citrate Complex

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Chinese Journal of Structural Chemistry 2014年第4期33卷 591-596页

作者：林维臣郭维刚王丽华马秀玲项生昌张章静 College of Chemistry and Chemical Engineering Fujian Provincial Key Laboratory of Polymer Materials Fujian Normal University College of Life and Environmental Sciences Minzu University of China State key laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences

A new Zn-citrate coordination complex {K[Zn（C6H5O7）（H2O）]}n（1） was synthesi- zed via hydrothermal reaction. In the crystal structure of complex 1, each citrate serves as thequadricdentate ligand coordinating to three Zn（II） ions, forming a zigzag chain, and such chains are further connected into a 3D network by the K＋ linkers. Crystal data for complex 1： triclinic, space group Pī, α = 7.3487（9）, b = 7.5397（6）, c = 9.6772（8） A, α = 76.894（8）, β = 68.260（10）, γ = 65.155（10）°, V = 450.34（7）？3 and Z = 2. Other characterizations by elemental analysis, IR, TG and fluorescence were also described.

关键词： zinc citrate synthesis crystal structure photolumineseence

Programmable and reconfigurable humidity-driven actuators made with MXene(Ti_(3)C_(2)T_(x))-cellulose nanofiber composites for biomimetic applications

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Nano Research 2024年第7期17卷 6619-6629页

作者： Shaofeng Zeng Yuanji Ye Peidi Zhou Shimin Yi Qiaohang Guo Huamin Chen Guozhen Shen Mingcen Weng School of Mechanical and Automotive Engineering Fujian University of TechnologyFuzhou 350118China School of materials Science and Engineering Fujian Provincial Key Laboratory of Advanced Materials Processing and ApplicationKey Laboratory of Polymer Materials and Products of Universities in FujianFujian University of TechnologyFuzhou 350118China Institute of Smart Marine and Engineering Fujian University of TechnologyFuzhou 350118China fujian key laboratory of Functional Marine Sensing materials College of Materials and Chemical EngineeringMinjiang UniversityFuzhou 350108China School of Integrated Circuits and Electronics Beijing Institute of TechnologyBeijing 100081China

Smart actuators have a wide range of applications in bionics and energy *** ability to reconfigure shape is essential for soft actuators to achieve various shapes and deformations,which is a crucial feature for next-generation ***,it is still an enormous challenge to establish a straightforward approach to creating programmable and reconfigurable ***-cellulose nanofiber composite film(MCCF)with a brick-and-mortar hierarchical structure was produced through a vacuum filtration *** demonstrates impressive mechanical properties such as a tensile stress of 68 MPa and a Young’s modulus of 4.65 ***,the MCCF highlights its potential for water-assisted shaping/welding due to the abundance of hydrogen bonds between MXene and cellulose *** also showcases capabilities as a humiditydriven actuator with a rapid response rate of 550°·s^(−1).Using the methods of water-assisted shaping/welding,several bionic actuators(such as flower,butterfly,and muscle)based on MCCF were designed,highlighting their versatility in applications of smart *** research showcases the impressive capabilities of MXene-based actuators and offers beneficial insights for the advancement of future intelligent materials.

关键词： MXene cellulose nanofibers programmable actuators humidity-driven

Generation of Three-Qutrit Singlet States with Two-Level Trapped Ions

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Communications in Theoretical Physics 2015年第10期64卷 391-394页

作者：杨榕灿叶丽香林秀陈翔 fujian provincial key laboratory of Quantum Manipulation and New Energy materials College of Physics and EnergyFujian Normal University

We propose an adiabatic-passage scheme for the generation of three-qutrit singlet states with two-level trapped ions. Distinctly different from previous proposals, we encode qutrits in Dicke states with two-level ions and use the adiabatic-evolution techniques in order not to exactly control the laser pulses, making the realization of the scheme much easier. Furthermore, the phonon is only virtually excited in the procedure, so the effect of the phonon losses can be reduced.

关键词： singlet states adiabatic passage trapped ions

Unconventional quantum gate based on Rydberg blockade mechanism

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Science China(Physics,Mechanics & Astronomy) 2013年第9期56卷 1755-1759页

作者： SUN RongHui YE MingYong LIN XiuMin fujian provincial key laboratory of Quantum Manipulation and New Energy materials College of Physics and EnergyFujian Normal University

We propose a scheme for realizing an unconventional three-qubit controlled-phase gate via the Rydberg blockade *** qubit is encoded by atomic ensembles that are trapped in optical traps and fixed on an atom *** of the collective nature of the encoding and the Rydberg blockade mechanism,the scheme do not require separate addressing of individual *** time needed for the gate operation is much shorter than that in a similar *** addition,we show the gate can be used as a basic tool for effective generation of large-scale 2D cluster states.

关键词： Rydberg blockade mechanism controlled-phase gate cluster state

Glucose-derived hydrothermal carbons as energy storage booster for vanadium redox flow batteries

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Journal of Energy Chemistry 2020年第6期29卷 31-39,I0002页

作者： Jiugen Qiu Baobing Huang Yuchuan Liu Dongyang Chen Zailai Xie fujian provincial key laboratory of Electrochemical Energy Storage materials College of ChemistryFuzhou UniversityFuzhou 350116FujianChina College of materials Science and Engineering Fuzhou UniversityFuzhou 350116FujianChina

Fabricating of high performance electrodes by a sustainable and cost effective method is essential to the development of vanadium redox flow batteries(VRFBs).In this work,an effective strategy is proposed to deposit carbon nanoparticles on graphite felts by hydrothermal carbonization *** in-situ method minimizes the drop off and aggregation of carbon nanoparticles during electrochemical *** integration of felts and hydrothermal carbons(HTC)produces a new electrode that combines the outstanding electrical conductivity of felts with the effective redox active sites provided by the HTC coating *** presence of the amorphous carbon layers on the felts is found to be able to promote the mass/charge transfer,and create oxygenated/nitrogenated active sites and hence enhances ***,the most optimized electrode based on a rational approach delivers an impressive electrochemical performance toward VRFBs in wide range of current densities from 200 to 500 mAcm^-*** voltage efficiency(VE)of GFs-HTC is much higher than the VEs of the pristine GFs,especially at high current *** exhibits a 4.18 times increase in discharge capacity over the pristine graphite felt respectively,at a high current density of 400 mAcm^-*** enhanced performance is attributed to the abundant active sites from amorphous hydrothermal carbon,which facilitates the fast electrochemical kinetics of vanadium redox *** work evidences that the glucose-derived hydrothermal carbons as energy storage booster hold great promise in practical VRFBs application.

关键词： Vanadium redox flow batteries Carbon nanoparticles Graphite felts Hydrothermal carbons Glucose

Ant-nest-inspired porous structure for MXene composites with high-performance energy-storage and actuating multifunctions

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Nano Research 2024年第7期17卷 6673-6685页

作者： Yi Wang Guanfeng Xue Zhiling Luo Wei Zhang Luzhuo Chen fujian provincial key laboratory of Quantum Manipulation and New Energy materials College of Physics and EnergyFujian Normal UniversityFuzhou 350117China fujian provincial Collaborative Innovation Center for Advanced High-Field Superconducting materials and Engineering Fuzhou 350117China

Integrating energy-storage devices(supercapacitors)and shape-deformation devices(actuators)advances the miniaturization and multifunctional development of soft ***,soft robots necessitate supercapacitors with high energy-storage performance and actuators with excellent actuation ***,inspired by ant nests,we present a porous structure fabricated by MXene-graphene-methylcellulose(M-GMC)composite,which overcomes the self-stacking of MXene nanosheets and offers a larger specific surface *** porous structure provides more channels and active sites for electrolyte ions,resulting in high energy storage *** areal capacitance of the M-GMC electrode reaches up to 787.9 mF·cm^(−2),significantly superior to that of the pristine MXene electrode(449.1 mF·cm^(−2)).Moreover,the M-GMC/polyethylene bilayer composites with energy storage and multi-responsive actuation functions are *** M-GMC is used as the electrode and the polyethylene is used as the encapsulation layer of the quasi-solid-state ***,the actuators fabricated by the bilayer composites can be driven by light or low voltage(≤9 V).The maximum bending curvature is up to 5.11 cm^(−1).Finally,a smart gripper and a fully encapsulated smart integrated circuit based on the M-GMC/polyethylene are *** smart gripper enables programmable control with multi-stage *** applications realize the intelligence and miniaturization of soft *** ant-nest-inspired M-GMC composites would provide a promising development strategy for soft robots and smart integrated devices.

关键词： MXene graphene ant nest supercapacitor actuator multi-functional

Self-template synthesis of hollow Fe-doped CoP prisms with enhanced oxygen evolution reaction activity

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Journal of Energy Chemistry 2021年第11期30卷 415-422,I0009页

作者： Xueda Ding Haitao Huang Qiang Wan Xu Guan Yuanxing Fang Sen Lin Dongyang Chen Zailai Xie College of materials Science and Engineering Fuzhou UniversityFuzhou 350116FujianChina fujian provincial key laboratory of Electrochemical Energy Storage materials College of ChemistryFuzhou UniversityFuzhou 350116FujianChina

The development of efficient, durable and low cost electrocatalysts is crucial but extremely challenging for the oxygen evolution reaction (OER). Herein, we develop a self-template strategy to synthesize hollow Fe-doped CoP prisms (Fe-CoP) via ion exchange of cobalt acetate hydroxide with [Fe(CN)_(6)]^(3-) and phosphorization-induced transformation of CoFe-PBA (Co/Fe-containing prussian blue analogue) prisms in N2 atmosphere. The obtained Fe-CoP not only inherits the hollow prism-like morphology of CoFe-PBA, but also forms rich mesoporous channel. The Fe-CoP prisms exhibit extraordinary OER performances in 1.0 M KOH, with a low overpotential of 236 mV to deliver a current density of 10 mA cm^(−2) and a low Tafel slope of 32.9 mV dec^(–1). Moreover, the presented electrocatalyst shows good long-term operating durability and activity. The XPS and TEM analysis confirm that Fe-CoP has undergone surface reconstruction in the process of electrocatalytic OER, and the in situ formed oxides and oxyhydroxides are the real active species to boost OER. This work provides a promising pathway to the design and synthesis of efficient and robust electrocatalysts with hierarchical hollow structure for boosting OER.

关键词： Prussian blue analogue Hollow structure Fe-doped CoP Oxygen evolution reaction