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Boosting charge extraction and efficiency of inverted perovskite solar cells through coordinating group modification at the buffer layer/cathode interface

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Nano Research 2025年第1期18卷 415-423页

作者： Zhiqing Liang Ziqiu Ren ziyu wang Nan Yan Ling Li Bo Zhang Yanlin Song College of Chemistry Zhengzhou UniversityZhengzhou 450052China Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education Shaanxi Key Laboratory for Advanced Energy DevicesShaanxi Engineering Lab for Advanced Energy Technology School of Materials Science and EngineeringShaanxi Normal UniversityXi’an 710119China Key Laboratory of Green Printing Institute of ChemistryChinese Academy of Sciences(ICCAS)Beijing Engineering Research Center of Nanomaterials for Green Printing TechnologyNational Laboratory for Molecular Sciences(BNLMS)Beijing 100190China

In inverted perovskite solar cells (PSCs),effective modification of the interface between the metalcathode and electron transport layer (ETL) is crucial forachieving high performance and stability. Herein, sulfonatedbathocuproine, commonly known as disodium bathocuproinedisulfonate (BCDS), was employed as a cathode buffer layerto address the interfacial issues at the [6,6]-phenyl-C61-butyricacid methyl ester (PCBM)/Ag interface. BCDS possesses theability to form coordinate bonds with Ag electrodes. Theutilization of the BCDS buffer layer enhanced the chargeextraction capability at the cathode interface whilesimultaneously achieving interfacial defect passivation,improving interfacial contact and increasing the built-in electricfield. Consequently, a power conversion efficiency (PCE) of25.06% was achieved. Furthermore, owing to the excellent filmforminguniformity of BCDS on PCBM, the stability of thedevice was also improved. After storage in dry air for morethan 2000 h, the device maintained 96% of its initial efficiency. This work underscores the remarkable potential of tailoringcoordination groups to enhance charge extraction efficiency at the ETL-cathode interface, unveiling a promising newfrontier in buffer layer development and performance optimization strategies for PSCs.

关键词： perovskite solar cells buffer layer bathocuproine disulfonate coordination group modification electron transport layer(ETL)-cathode interface

Design and experimental study of a new flapping wing rotor micro aerial vehicle

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Chinese Journal of Aeronautics 2020年第12期33卷 3092-3099页

作者： Xin DONG Daochun LI Jinwu XIANG ziyu wang School of Aeronautic Science and Engineering Beihang UniversityBeijing 100083China

A three-wing Flapping Wing Rotor Micro Aerial Vehicle(FWR-MAV)which can perform controlled flight is introduced and an experimental study on this vehicle is presented.A mechanically driven flapping rotary mechanism is designed to drive the three flapping wings and generate lift,and control mechanisms are designed to control the pose of the FWR-MAV.A flight control board for attitude control with robust onboard attitude estimation and a control algorithm is also developed to perform stable hovering flight and forward flight.A series of flight tests was conducted,with hovering flight and forward flight tests performed to optimize the control parameters and assess the performance of the *** hovering flight test shows the ability of the FWR-MAV to counteract the moment generated by rotary motion and maintain the attitude of the FWR-MAV in space;the experiment of forward flight shows that the FWR-MAV can track the desired attitude.

关键词： Attitude estimation Flapping wing rotor Flight control Flight tests Micro aerial vehicle(MAV)

Miura-ori structured flexible microneedle array electrode for biosignal recording

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Microsystems & Nanoengineering 2021年第4期7卷 59-66页

作者： Yue Hou Zhaoyu Li ziyu wang Hongyu Yu Department of Mechanical and Aerospace Engineering The Hong Kong University of Science and TechnologyKowloonHong Kong SAR 999077China The Institute of Technological Sciences Wuhan UniversityWuhan 430072China

Highly reliable signal recording with low electrode-skin impedance makes the microneedle array electrode(MAE)a promising candidate for biosignal ***,when used in long-term health monitoring for some incidental diseases,flexible microneedles with perfectly skin-tight fit substrates lead to sweat accumulation inside,which will not only affect the signal output but also trigger some skin allergic *** this paper,a flexible MAE on a Miura-ori structured substrate is proposed and fabricated with two-directional in-plane *** results from the comparison tests show enhanced performance in terms of(1)the device reliability by resisting peeling off of the metal layer from the substrate during the operation and(2)air ventilation,achieved from the air-circulating channels,to remove ***-signal recordings of electrocardiography(ECG),as well as electromyography(EMG)of the biceps brachii,in both static and dynamic states,are successfully demonstrated with superior accuracy and long-term stability,demonstrating the great potential in health monitoring applications.

关键词： recording electrode Miura

结直肠癌患者新辅助化疗期间骨骼肌质量的变化及其预后价值

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临床放射学杂志 2025年第1期44卷 119-123页

作者：梁宗超王梓羽田明杰罗宁斌广西医科大学附属肿瘤医院南宁530021

目的探讨结直肠癌患者新辅助化疗期间骨骼肌质量的变化情况,并评估其与患者预后的关系。方法回顾性搜集2014年8月至2022年12月接受新辅助化疗及根治性切除手术治疗的178例结直肠癌患者资料。基于CT测量L 3水平骨骼肌面积和密度用于评价... 详细信息

目的探讨结直肠癌患者新辅助化疗期间骨骼肌质量的变化情况,并评估其与患者预后的关系。方法回顾性搜集2014年8月至2022年12月接受新辅助化疗及根治性切除手术治疗的178例结直肠癌患者资料。基于CT测量L 3水平骨骼肌面积和密度用于评价骨骼肌质量。采用配对样本t检验评估患者新辅助化疗期间骨骼肌质量的变化。多因素Cox回归分析及Kaplan-Meier生存曲线用于评估骨骼肌质量变化与患者总体生存率的相关性。结果患者的骨骼肌面积在新辅助化疗后显著降低[(99.42±25.56)cm 2 vs.(94.07±24.13)cm 2,t=8.801,P4.32%是结直肠癌患者总体生存率的独立危险因素(HR=1.784,95%CI:1.014~3.140,P=0.045)。Kaplan-Meier生存曲线显示新辅助化疗期间骨骼肌面积损失>4.32%的结直肠癌患者总体生存率显著降低(Log-Rank P=0.0015)。结论结直肠癌患者新辅助化疗期间的骨骼肌面积会显著损失,且损失程度与预后相关。

关键词：结直肠癌体层摄影术 X线计算机骨骼肌新辅助化疗总体生存期

Error correction for short-range optical interconnect using COTS transceivers

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Science China(Information Sciences) 2019年第6期62卷 72-78页

作者： ziyuan ZHENG Chuanchuan YANG Dan ZHAO ziyu wang State Key Laboratory of Advanced Optical Communication Systems and Networks School of Electronics Engineering and Computer Science Peking University

Nowadays, quantities of commercial off-the-shelf(COTS) optical transceivers are widely equipped in both exiting and abuilding data centers. As data centers are becoming larger and containing more servers, the method to ensure longer and steady transmission with COTS optical transceivers becomes one of the key issues. Meanwhile, variations in the manufacturing of COTS optical transceivers bring in fluctuation of packet error rate(PER) in communication. In this paper, we present an application layer adaptive forward error correction(AL-AFEC) coding scheme for COTS optical transceivers in optical interconnect to solve the problems mentioned above and test its performance in a 10 Gbps Ethernet(10 GbE)link using 10 GBASE-SR SFP+ modules. Experimental results show that the proposed scheme enables longer transmission distance and the instability introduced by manufactural variations is well settled. Since our scheme requires no extra hardware on optical transceivers, it is a considerable low-cost alternative to improve system reliability and achieve longer transmission distance for COTS optical transceivers.

关键词： short-range optical interconnect vertical cavity surface emitting laser(VCSEL) ethernet application layer adaptive forward error correction commercial off-the-shelf optical transceiver

Extremely Anisotropic Thermoelectric Properties of SnSe Under Pressure

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Energy & Environmental Materials 2023年第3期6卷 58-65页

作者： Wei Cao ziyu wang Ling Miao Jing Shi Rui Xiong Key Laboratory of Artificial Micro-and Nano-structures of Ministry of Education School of Physics and TechnologyWuhan UniversityWuhan 430072China The Institute of Technological Sciences Wuhan UniversityWuhan 430072China Suzhou Institute of Wuhan University Suzhou 215123China School of Optical and Electronic Information Huazhong University of Science and TechnologyWuhan 430074China

SnSe has attracted extensive attention due to its ultralow thermal conductivity and excellent thermoelectric *** this work,pressure-induced thermoelectric properties of Pnma SnSe are investigated via first-principles *** uncover distinct energy isosurfaces topology transition of conduction band by applying *** newly created conduction band valley caused by pressure has a distinct anisotropic shape compared to the old *** pressure can greatly enhance the anisotropy of electronic transport properties of the n-type Pnma ***,the lattice thermal conductivity also exhibits anisotropic behavior under pressure due to a special collaged phonon *** pressure-induced lattice thermal conductivity along the a-axis shows a slower growth trend than that along the b-axis and *** optimal ZT value of the n-type Pnma SnSe along the a-axis can reach 1.64 at room *** results would be helpful for designing the Pnma SnSe-based materials for the potential thermoelectric and valleytronic applications.

关键词： first-principles calculations pressure SnSe thermoelectric materials

Two Phase Flow Simulation of Fractal Oil Reservoir Based on Meshless Method

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Energy Engineering 2022年第2期119卷 653-664页

作者： Xian Zhou Fei wang ziyu wang Yunfeng Xu School of Petroleum Engineering Yangtze UniversityWuhan430100China China Oilfield Services Limited TianjinChina Xinmin Oil Production Plant of Jilin Oilfield Company PetroChinaSongyuan138000China

The reservoir is the networked rock skeleton of an oil and gas trap,as well as the generic term for the fluid contained within pore fractures and karst *** and a complex internal pore structure characterize the reservoir *** introducing the fractal permeability formula,this paper establishes a fractal mathematical model of oil-water two-phase flow in an oil reservoir with heterogeneity characteristics and numerically solves the mathematical model using the weighted least squares meshless ***,the method’s correctness is verified by comparison to the exact *** numerical results demonstrate that the fractal oil-water two-phase flow mathematical model developed using the meshless method is capable of more accurately and efficiently describing the flow characteristics of the oil-water two-phase migration *** comparison to the conventional numerical model,this method achieves a greater degree of convergence and *** paper examines the effect of varying the initial viscosity of the oil,the initial formation pressure,and the production and injection ratios on daily oil production per well,water cut in the block,and accumulated oil in the *** 10 and 60 cp initial crude oil viscosities,the water cut can be 0.62 and 0.80,with 3100 and 1900 m^(3)cumulative oil *** pressures have little effect on *** this case,the daily oil production of well PRO1 is 1.7 m^(3)at 7 and 10 MPa initial *** cumulative oil production is 3465.4 and 2149.9m^(3)when the production injection ratio is 1.4 and *** two-phase meshless method described in this paper is essential for a rational and effective study of production dynamics patterns in complex reservoirs and the development of reservoir simulations of oil-water flow in heterogeneous reservoirs.

关键词： Oil-water two-phase flow fractal theory weighted least square method meshless method

Bimetallic AuRu aerogel with enzyme-like activity for colorimetric detection of Fe^(2+) and glucose

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Chinese Chemical Letters 2022年第10期33卷 4683-4686页

作者： Rongxin Xu ziyu wang Siquan Liu He Li College of Optoelectronics Technology Chengdu University of Information TechnologyChengdu 610225China School of Chemistry and Chemical Engineering University of JinanJi'nan 250022China

Aerogels have become a hot topic of research due to their extremely low density and special interconnected structure as well as their enzyme-like *** development of new multifunctional nano-enzyme aerogels with high activity and good stability is still a considerable *** this paper,AuRu aerogels with peroxidase and oxidase activities were synthesized using a simple one-step method and successfully used to construct colorimetric sensors for the detection of Fe^(2+)and glucose based on their enzyme-like ***,we are fortunate to find that AuRu aerogels have good photothermal *** suggests that AuRu aerogels can be used not only for in vitro testing but also for promising applications such as disease treatment.

关键词： Au-Ru aerogels Multifunctional nanozyme Peroxidase-mimicking Oxidase-like activity Colorimetric detection

A low-complexity sensor fusion algorithm based on a fiber-optic gyroscope aided camera pose estimation system

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Science China(Information Sciences) 2016年第4期59卷 160-171页

作者： Zhongwei TAN Chuanchuan YANG Yuliang LI Yan YAN Changhong HE Xinyue wang ziyu wang State Key Laboratory of Advanced Optical Communication Systems and Networks School of Electronics Engineering and Computer Science Peking University School of Information Science and Technology Xiamen University College of Information and Electrical Engineering China Agricultural University

Visual tracking, as a popular computer vision technique, has a wide range of applications, such as camera pose estimation. Conventional methods for it are mostly based on vision only, which are complex for image processing due to the use of only one sensor. This paper proposes a novel sensor fusion algorithm fusing the data from the camera and the fiber-optic gyroscope. In this system, the camera acquires images and detects the object directly at the beginning of each tracking stage; while the relative motion between the camera and the object measured by the fiber-optic gyroscope can track the object coordinate so that it can improve the effectiveness of visual tracking. Therefore, the sensor fusion algorithm presented based on the tracking system can overcome the drawbacks of the two sensors and take advantage of the sensor fusion to track the object accurately. In addition, the computational complexity of our proposed algorithm is obviously lower compared with the existing approaches(86% reducing for a 0.5 min visual tracking). Experiment results show that this visual tracking system reduces the tracking error by 6.15% comparing with the conventional vision-only tracking scheme(edge detection), and our proposed sensor fusion algorithm can achieve a long-term tracking with the help of bias drift suppression calibration.

关键词： visual tracking camera pose estimation fiber-optic gyroscope low-complexity sensor fusion