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Highly efficient fiber-shaped organic solar cells toward wearable flexible electronics

npj Flexible Electronics 2022年第1期6卷 382-390页

作者： dan Lv Qianqing Jiang Yuanyuan Shang dianyi Liu Zhejiang University HangzhouZhejiang ProvinceChina Key Laboratory of 3D Micro/nano Fabrication and Characterization of Zhejiang Province School of EngineeringWestlake UniversityHangzhouZhejiang ProvinceChina Institute of Advanced Technology Westlake Institute for Advanced StudyHangzhouZhejiang ProvinceChina School of Physics and Microelectronics Zhengzhou UniversityZhengzhouHenan ProvinceChina

Fiber-shaped solar cells(FSCs)show great potential to act as the power source in the wearable electronics *** to the unique advantages of the fiber-shaped organic solar cells(FOSCs),such as all-solid-state,ease of fabrication,and environmental friendliness,FOSCs are the strongest candidate among all types of FSCs for wearable ***,the development of FOSCs is seriously lagging behind other types of *** this work,we demonstrate the efficient FOSCs with non-fullereneacceptors(NFAs)-based light-harvesting *** FOSCs present efficiencies exceeding 9%under AM 1.5 G irradiation *** performance influence factors including hole/electron transport layers,active layer,counter electrodes,solvents,and especially,the environmental humidity is systematically *** FOSCs not only can easily drive the electrical devices but also can be woven into the textile to charge the *** study exhibits the great potential to apply the FOSCs as the power supply source in the wearable electronic field.

关键词： shaped fiber exceeding

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Electron-Beam Irradiation Induced Regulation of Surface defects in Lead Halide Perovskite Thin Films

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Research 2021年第1期2021卷 912-922页

作者： Binbin Jin ding Zhao Fei Liang Lufang Liu dongli Liu Pan Wang Min Qiu Key Laboratory of 3D Micro/Nano Fabrication and Characterization of Zhejiang Province School of EngineeringWestlake University18 Shilongshan RoadHangzhou310024 Zhejiang ProvinceChina Institute of Advanced Technology Westlake Institute for Advanced Study18 Shilongshan RoadHangzhou310024 Zhejiang ProvinceChina State Key Laboratory of Crystal Materials and Institute of Crystal Materials Shandong UniversityJinan 250100China State Key Laboratory of Modern Optical Instrumentation College of Optical Science and EngineeringZhejiang UniversityHangzhou 310027China

Organic-inorganic hybrid perovskites(OIHPs)have been intensively studied due to their fascinating optoelectronic *** microscopy and related characterization techniques are powerful to figure out their structure-property relationships at the ***,electron beam irradiation usually causes damage to these beam-sensitive materials and thus deteriorates the associated *** a widely used CH_(3)NH_(3)PbI_(3)film as an example,here,we carry out a comprehensive study on how electron beam irradiation affects its ***,our results reveal that photoluminescence(PL)intensity of the film can be significantly improved along with blue-shift of emission peak at a specific electron beam dose *** improvement stems from the reduction of trap density at the CH_(3)NH_(3)PbI_(3)*** knock-on effect helps expose a fresh surface assisted by the surface defect-induced lowering of displacement threshold ***,the radiolysis process consistently degrades the crystal structure and weaken the PL emission with the increase of electron beam ***,the final PL emission comes from a balance between knock-on and radiolysis *** advantage of the defect regulation,we successfully demonstrate a patterned CH_(3)NH_(3)PbI_(3)film with controllable PL emission and a photodetector with enhanced *** work will trigger the application of electron beam irradiation as a powerful tool for perovskite materials processing in micro-LEds and other optoelectronic applications.

关键词： properties. surface. Electron

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Color-preserving passive radiative cooling for an actively temperature-regulated enclosure

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Light(Science & Applications) 2022年第6期11卷 1130-1138页

作者： Yining Zhu Hao Luo Chenying Yang Bing Qin Pintu Ghosh Sandeep Kaur Weidong Shen Min Qiu Pavel Belov Qiang Lie State Key Laboratory of Modern Optical Instrumentation College of Optical Science and EngineeringZhejiang University310027 HangzhouChina Key Laboratory of 3D Micro/Nano Fabrication and Characterization of Zhejiang Province School of EngineeringWestlake University18 Shilongshan Road310024 HangzhouZhejiang ProvinceChina Institute of Advanced Technology Westlake Institute for Advanced Study18 Shilongshan Road310024 HangzhouZhejiang ProvinceChina Department of Physics and Engineering ITMO UniversitySaint PetersburgRussia

Active temperature control devices are widely used for the thermal management of enclosures,including vehicles and *** radiative cooling has been extensively studied;however,its integration with existing actively temperature regulated and decorative enclosures has slipped out of the research at status ***,we present a photonic-engineered dual-side thermal management strategy for reducing the active power consumption of the existing temperature-regulated enclosure without sacrificing its *** coating the exterior and interior of the enclosure roof with two visible-transparent films with distinctive wavelength-selectivity,simultaneous control over the energy exchange among the enclosure with the hot sun,the cold outer space,the atmosphere,and the active cooler can be implemented.A power-saving of up to 63%for active coolers of the enclosure is experimentally demonstrated by measuring the heat flux compared to the ordinary enclosure when the set temperature is around 26℃.This photonic-engineered dual-side thermal management strategy offers facile integration with the existing enclosures and represents a new paradigm toward carbon neutrality.

关键词： radiative passive preserving

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Granular Ionogel Particle Inks for 3d Printed Tough and Stretchable Ionotronics

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Research 2024年第1期2023卷 429-442页

作者： Yuan Yao Yue Hui Zhenhua Wang Hehao Chen Heng Zhu Nanjia Zhou Key Laboratory of 3D Micro/Nano Fabrication and Characterization of Zhejiang Province School of EngineeringWestlake UniversityHangzhou 310024Zhejiang ProvinceChina Institute of Advanced Technology Westlake Institute for Advanced StudyHangzhou 310024Zhejiang ProvinceChina School of Chemical Engineering and Advanced Materials the University of AdelaideAdelaide 5005South AustraliaAustralia State Key Laboratory of Fluid Power&Mechatronic System Key Laboratory of Soft Machines and Smart Devices of Zhejiang ProvinceCenter for X-MechanicsDepartment of Engineering MechanicsZhejiang UniversityHangzhou 310027China

Ionogels have garnered great attention as promising soft conducting materials for the fabrication of flexible energy storage devices,soft actuators,and ***,the leakage of the ionic liquids,weak mechanical strength,and poor manufacturability have greatly limited their reliability and ***,we propose a new ionogel synthesis strategy by utilizing granular zwitterionic microparticles to stabilize ionic *** ionic liquids swell the microparticles and physically crosslink microparticles via either electronic interaction or hydrogen *** introducing a photocurable acrylic monomer enables the fabrication of double-network(dN)ionogels with high stretchability(>600%)and ultrahigh toughness(fracture energy>10 kJ/m^(2)).The synthesized ionogels exhibit a wide working temperature of−60 to 90℃.By tuning the crosslinking density of microparticles and physical crosslinking strength of ionogels,we synthesize dN ionogel inks and print them into three-dimensional(3d)*** ionogelbased ionotronics are 3d printed as demonstrations,including strain gauges,humidity sensors,and ionic skins made of capacitive touch sensor *** covalently linking ionogels with silicone elastomers,we integrate the ionogel sensors onto pneumatic soft actuators and demonstrate their capacities in sensing large *** our last demonstration,multimaterial direct ink writing is harnessed to fabricate highly stretchable and durable alternating-current electroluminescent devices with arbitrary *** printable granular ionogel ink represents a versatile platform for the future manufacturing of ionotronics.

关键词： crosslinking utilizing gauge

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Flexible multifunctional platform based on piezoelectric acoustics for human–machine interaction and environmental perception

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microsystems & nanoengineering 2022年第5期8卷 91-103页

作者： Qian Zhang Yong Wang dongsheng Li Jin Xie Ran Tao Jingting Luo Xuewu dai Hamdi Torun Qiang Wu Wai Pang Ng Richard Binns YongQing Fu The State Key Laboratory of Fluid Power and Mechatronic Systems Zhejiang University310027 HangzhouChina Faculty of Engineering and Environment University of NorthumbriaNewcastle upon Tyne NE18STUK Key Laboratory of 3D Micro/Nano Fabrication and Characterization of Zhejiang Province School of EngineeringWestlake University310024 HangzhouChina Key Laboratory of Optoelectronic Devices and Systems of Education Ministry and Guangdong Province College of Physics and Optoelectronic EngineeringShenzhen University518060 ShenzhenChina

Flexible human–machine interfaces show broad prospects for next-generation flexible or wearable electronics compared with their currently available bulky and rigid ***,compared to their rigid counterparts,most reported flexible devices(e.g.,flexible loudspeakers and microphones)show inferior performance,mainly due to the nature of their ***,it is of great significance to improve their performance by developing and optimizing new materials,structures and design *** this paper,a flexible acoustic platform based on a zinc oxide(ZnO)thin film on an aluminum foil substrate is developed and optimized;this platform can be applied as a loudspeaker,a microphone,or an ambient sensor depending on the selection of its excitation *** used as a speaker,the proposed structure shows a high sound pressure level(SPL)of~90 dB(with a standard deviation of~3.6 dB),a low total harmonic distortion of~1.41%,and a uniform directivity(with a standard deviation of~4 dB).Its normalized SPL is higher than those of similar devices reported in the recent *** used as a microphone,the proposed device shows a precision of 98%for speech recognition,and the measured audio signals show a strong similarity to the original audio signals,demonstrating its equivalent performance compared to a rigid commercial *** a flexible sensor,this device shows a high temperature coefficient of frequency of−289 ppm/K and good performance for respiratory monitoring.

关键词： acoustics piezoelectric speakers

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A dilute fluorine-free electrolyte design for high-voltage hybrid aqueous batteries

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Journal of Energy Chemistry 2023年第2期77卷 180-190,I0005页

作者： Rui Lin Jiahao Chen Changming Ke Shi Liu Jianhui Wang School of Materials Science&Engineering Zhejiang UniversityHangzhou 310024ZhejiangChina Key Laboratory of 3D Micro/Nano Fabrication and Characterization of Zhejiang Province School of EngineeringWestlake UniversityHangzhou 310024ZhejiangChina Institute of Advanced Technology Westlake Institute for Advanced StudyHangzhou 310024ZhejiangChina Key Laboratory for Quantum Materials of Zhejiang Province Department of PhysicsSchool of ScienceWestlake UniversityHangzhou 310030ZhejiangChina Institute of Natural Sciences Westlake Institute for Advanced StudyHangzhou 310024ZhejiangChina

Fluorinated salts and/or high salt concentrations are usually necessary to produce protective films on the electrodes for high-voltage aqueous batteries,yet these approaches increase the cost,toxicity and reaction resistances of ***,we report a dilute fluorine-free electrolyte design to overcome this *** using the LiClO_(4) salt and polyethylene glycol dimethyl ether(PEd)solvent and optimizing the LiClO_(4)/PEd/H_(2)O molar ratio,we formulate a 1 mol kg^(-1)3 V-class hybrid aqueous electrolyte that enables reversible charge/discharge of 2.5 V LiMn_(2)O_(4)|Li_(4)Ti_(5)O_(12) full cell at both low(0.5C,92.4%capacity retention in 300 cycles)and high(5C,80.4%capacity retention in 2000 cycles)*** excellent performance is reached even without the generation of protective film on either anode or cathode as identified by in/ex situ *** selection of appropriate ingredients that have both high stability and strong interactions with water is critical to widen the potential window of electrolyte while suppressing parasitic reactions on the *** work suggests that expensive and toxic fluorinate salts are no longer necessary for 3 V-class aqueous electrolytes,boosting the development of low-cost,environmentally-friendly,high-power and high-energy-density aqueous batteries.

关键词： High-voltage hybrid aqueous batteries Fluorine-free electrolyte design Interphase chemistry Polyethylene glycol dimethyl ether

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Fully-Printed Flexible Indium-Tin-Oxide Thin-Film Transistors and Logic Circuits 5

Fully-Printed Flexible Indium-Tin-Oxide Thin-Film Transistor...

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5th IEEE International Flexible Electronics Technology Conference, IFETC 2023

作者： Liang, Kun Ren, Huihui Zhu, Bowen School of Engineering Westlake University Key Laboratory of 3D Micro/Nano Fabrication and Characterization of Zhejiang Province Hangzhou310024 China Institute of Advanced Technology Westlake Institute for Advanced Study Hangzhou310024 China

ISBN: (纸本)9798350332094

fabrication of metal oxide thin-film transistors (MO TFTs) using the inkjet printing process has attracted great interest in low-cost and large-Area electronic devices. However, to develop fully-printed flexible MO TFTs with superior electrical performance remains challenging. In this study, we achieve fully-printed flexible indium-Tin-oxide (ITO) TFTs and logic inverters on bendable glass and ultrathin polyimide (PI) film substrates with outstanding electrical performance and excellent stability. This cost-effective and reliable strategy enables the printed MO-TFTs for applications in flexible and wearable electronics. © 2023 IEEE.

关键词： Thin film transistors

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First demonstration of 2.5d Out-of-Plane-Based Hybrid Stacked Super-Bionic Compound Eye CMOS Chip with Broadband (300-1600 nm) and Wide-Angle (170°) Photodetection

First Demonstration of 2.5D Out-of-Plane-Based Hybrid Stacke...

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2024 IEEE International Electron devices Meeting, IEdM 2024

作者： Xie, Yunfei Wang, Xiaochen He, Jing Xie, Yongliang Zhang, Zhi-Xiang Ning, Hao Lin, Jiangming Bodepudi, Srikrishna Chanakya Li, Jiye Li, Zongwen Zhang, Qianqian Chen, Yance Pan, Zijian Ma, Yuan He, Youshui dai, Yue Chai, Jian Anwar, Muhammad Abid Yu, Bin Wen, Liaoyong Xu, Yang College of Integrated Circuits State Key Laboratory of Silicon and Advanced Semiconductor Materials ZJU-HIC Zhejiang University Hangzhou China Key Laboratory of 3D Micro/Nano Fabrication and Characterization of Zhejiang Province School of Engineering Westlake University Hangzhou China

ISBN: (纸本)9798350365429

We propose a hybrid stacked CMOS bionic chip. The surface employs a fabrication process involving binary-pore anodic aluminum oxide (AAO) templates and integrates monolayer graphene (Gr) to mimic the compound eyes, thereby enhancing detection capabilities in the ultraviolet and visible ranges. Utilizing a 2.5d out-of-plane architecture, it achieves a wide-angle detection effect (170°) equivalent to curved surfaces while enhancing absorption in the 1550 nm communication band to nearly 100%. Additionally, through-silicon via (TSV) technology is integrated for wafer-level fabrication, and a CMOS 0.18-μm integrated readout circuit is developed, achieving the super-bionic compound eye chip based on hybrid stacked integration. This work not only enables wide-angle detection in planar chips, incorporating the features of traditional curved structures, while extending the detection spectra of silicon-based chips, suitable for wafer-level production. This advancement not only reduces costs but also significantly improves compatibility with existing CMOS processes, paving the way for cutting-edge chip integrating broadband and wide-angle detection technology. © 2024 IEEE.

关键词： CMOS integrated circuits

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Balancing efficiency and transparency in organic transparent photovoltaics

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npj Flexible Electronics 2022年第1期6卷 391-400页

作者： Ruiqian Meng Qianqing Jiang dianyi Liu Zhejiang University Hangzhou 310013 Zhejiang ProvinceChina Key Laboratory of 3D Micro/Nano Fabrication and Characterization of Zhejiang Province Research Center for Industries of the Future and School of EngineeringWestlake University18 Shilongshan RoadHangzhou 310024 Zhejiang ProvinceChina Institute of Advanced Technology Westlake Institute for Advanced Study18 Shilongshan RoadHangzhou 310024 Zhejiang ProvinceChina

The challenges in transparent photovoltaic(TPV)fields are still that the device transparency and efficiency are difficult to be balanced to meet the requirements of practical *** this study,we systematically investigated the interrelationship between photovoltaic film properties,optical transmission,and photovoltaic performances in the near-infrared harvesting organic *** results indicate that the photovoltaic film thickness determines the TPV’s transparency and meanwhile affects the device efficiency;by contrast,the donor-acceptor ratio only affects device efficiency and has little effect on *** controlling the film thickness and donor-acceptor ratio,the average visible transmission(AVT)of TPVs can be precisely managed in the range of 40%-85%,and the device efficiency can achieve as high as 4.06%and 2.38%while the AVT exceeds 70%and 80%,***,the large area(~10 cm^(2))TPV modules and ultra-flexible devices were then successfully prepared based on the systematical study.

关键词： transparent transparency donor

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Impact of flm thickness in laser‑induced periodic structures on amorphous Si flms

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Frontiers of Optoelectronics 2023年第2期16卷 115-122页

作者： Liye Xu Jiao Geng Liping Shi Weicheng Cui Min Qiu College of Optical Science and Engineering Zhejiang UniversityHangzhou 310058China Key Laboratory of 3D Micro/Nano Fabrication and Characterization of Zhejiang Province School of EngineeringWestlake UniversityHangzhou 310024China Key Laboratory of Coastal Environment and Resources of Zhejiang Province(KLaCER) School of EngineeringWestlake UniversityHangzhou 310024China Institute of Advanced Technology Westlake Institute for Advanced StudyHangzhou 310024China Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074China

We report self-organized periodic nanostructures on amorphous silicon thin flms by femtosecond laser-induced *** dependence of structural periodicity on the thickness of silicon flms and the substrate materials is *** results reveal that when silicon flm is 200 nm,the period of self-organized nanostructures is close to the laser wavelength and is insensitive to the *** contrast,when the silicon flm is 50 nm,the period of nanostructures is much shorter than the laser wavelength,and is dependent on the ***,we demonstrate that,for the thick silicon flms,quasi-cylindrical waves dominate the formation of periodic nanostructures,while for the thin silicon flms,the formation originates from slab waveguide ***-diference time-domain method-based numerical simulations support the experimental discoveries.

关键词： Laser-induced periodic surface structures(LIPSS) Ultrafast optoelectronics Laser nanofabrication Quasicylindrical waves

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