Yu Shi

University of Cincinnati

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Chunyang Jia

University of Electronic Science and Technology of China

Zhongquan Wan

University of Electronic Science and Technology of China

Thomas L. Beck

Oak Ridge National Laboratory

Qi Zhou

University of Electronic Science and Technology of China

Bo Zhang

University of Electronic Science and Technology of China

Wanjun Chen

University of Electronic Science and Technology of China

Xiaojun Yao

Lanzhou University

Jianxing Xia

Tianjin University

Junsheng Luo

University of Electronic Science and Technology of China

Qian Li

Soochow University

Cooperative Institutions

University of Electronic Science and Technology of China

National Engineering Research Center of Electromagnetic Radiation Control Materials

Chinese Academy of Sciences

State Key Laboratory of Electronic Thin Films and Integrated Devices

Xi'an Jiaotong University

University of Chinese Academy of Sciences

Peking University

China Building Materials Academy

Shanghai University

Tsinghua University

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Dipole evoked hole-transporting material p-doping by utilizing organic salt for perovskite solar cells

Nano Energy (2021)

Jianxing Xia Ruiling Zhang Junsheng Luo Hua Gui Yang Hongyu Shu

10.1016/j.nanoen.2021.106018

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Citations (43)

Effect of annealing on properties of R2O-SiO2-B2O3 glass

Yu Shi Jinsheng Jia Yong Sun Caili Wang Jiao Lian

The R2O-SiO2-B2O3 glass has emerged as an important material due to its high performance. Annealing condition has significant effect on the properties of R₂O-SiO₂-B₂O₃ glass. R₂O-SiO₂-B₂O₃ glass has been annealed in different temperature and holding time. The influence of the annealing condition on the properties of R2O-SiO2-B2O3 glass such as hardness, refractive index, and transmissivity were systematically studied. The results indicate that the annealing process can reduce glass hardness and improve refractive index significantly, but enhance transmissivity slightly. The optimal performance of the R₂O-SiO₂-B₂O₃ glass can be obtained under the annealing temperature of 650°C with the holding time of 4h.

Optical glass

10.1117/12.2579458

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Effect of fining agents on properties of R2O-SiO2-B2O3 glass

Yu Shi Weijie Hou Jinsheng Jia Yang Zhang Caili Wang

The R₂O-SiO₂-B₂O₃ glass has emerged as an important material due to its high performance. During the process of glass melting, copious amounts of bubbles can be produced. The bubbles are considered as serious defects of the R₂O-SiO₂-B₂O₃ glass and can induce negative effects on properties of glass, such as optical uniformity, mechanical property, etc. The influence of the fining agents on the properties of R₂O-SiO₂-B₂O₃ glass such as density, refractive index, and transmissivity were systematically studied. The results indicate that fining agents had influence on the density of the R₂O-SiO₂-B₂O₃ glass, fining agents do not have obvious impact on the refractive index and transmissivity of R₂O-SiO₂-B₂O₃ glass.

Aluminium oxides

Borosilicate glass

10.1117/12.2580146

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Effect of substituting Y with Mg on the microstructure and electrochemical performance of LaY2Ni9 hydrogen storage alloy

Catalysis Today (2018)

Yu Shi Haiyan Leng Qun Luo Shuanglin Chen Qian Li

Rietveld Refinement

Vacuum induction melting

10.1016/j.cattod.2018.08.016

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Citations (26)

HAD fabricated on UTB AlGaN/GaN heterostructure for high‐sensitivity zero‐bias microwave detection

Electronics Letters (2019)

Yu Yun Wei Xiong Yu Shi Kuangli Chen Qi Zhou

A novel technology based on aluminium gallium nitride (AlGaN)/GaN hybrid‐anode diode (HAD) for precise modulation of turn‐on voltage is proposed and experimentally demonstrated. By delicately tailoring the as‐grown barrier thickness, the turn‐on voltage of the HAD and yet the non‐linearity at zero bias (i.e. 0 V) for efficient microwave detection can be flexibly modulated. An AlGaN/GaN ultra‐thin‐barrier HAD (UTB‐HAD) was designed and fabricated for zero‐bias microwave detection. The AlGaN‐barrier thickness was optimised to be 5 nm by TCAD simulation, which yields a strong non‐linearity at zero bias featuring a high‐curvature coefficient ( γ ) of 27 V −1 in the fabricated UTB‐HAD. The first‐order voltage sensitivity β V is projected to be as high as 2.7 mV/μW. The proposed approach of precise sensitivity modulation is of great interests for high‐efficient zero‐bias microwave detection applications.

Zero (linguistics)

10.1049/el.2019.2548

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The UIS Withstand Capability and Device Failure Mechanism of 650 V p-GaN Gate HEMTs

Qihang Huang Liping Ma Yongquan Nie Shu-Ting Huang Jianggen Zhu

Wide-bandgap semiconductor

Failure mechanism

10.1109/icsict62049.2024.10832005

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Research on the formation mechanism and control technology of defects in the optical fiber arrays

Wang Caili Xue Cao Dandan Zhao Yu Shi Shiyong Xie

10.1117/12.3057076

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Selenoviologen‐Appendant Metallacycles with Highly Stable Radical Cations and Long‐Lived Charge Separation States for Electrochromism and Photocatalysis

Angewandte Chemie (2022)

Sikun Zhang Lingzhi Ma Wenqiang Ma Long Chen Kai Gao

Abstract Two coordinated metallacycles (rhomboid for M1 , hexagonal for M2 ) with selenoviologens (SeV 2+ ) pendants were synthesized via coordination‐driven hierarchical self‐assembly. M1 / M2 with rigid and discrete metallacyclic cores showed tunable optoelectronic properties due to strong π–π stacking and push–pull electron structures. Femtosecond transient absorption (fs‐TA) revealed that the formation of macrocyclic structure can not only enhance the stability of radical cation, but also improve the efficiency of intramolecular charge transfer and produce a long‐lived charge separation state. The electrochromic performances of M1 / M2 ‐based devices were exhibited to show decent radical stabilization. By using M1 / M2 as the photocatalyst, the improved catalytic efficiency (>80 %) of visible‐light‐induced cross‐dehydrogenative coupling (CDC) reactions was achieved due to the highly stable radical cations and long‐lived charge separation states, which were also confirmed by fs‐TA.

Radical ion

10.1002/ange.202209054

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P‐2: Effect of Buffer Layer on Performance and Reliability of Flexible a‐IGZO TFTs Fabricated on Colorless Polyimide of G4.5

SID Symposium Digest of Technical Papers (2019)

Huafei Xie Yu Shi Macai Lu Nian Liu Zhuhui Li

A series of gas barrier films on colorless polyimide substrates are studied at G4.5 backplane. The performances of barrier layer and TFT are identified by the film‐forming temperature, film structure, reliabilities, NBTIS and WVTR. The use of a SiNx‐SiOx (100nm–500nm) at PECVD temperature 285/295 °C resulted in the best light transmittance and reliabilities, and the electrical properties of a‐IGZO TFTs on glass is better than on cPI. The WVTR value of the SiNx‐SiOx (100nm–500nm) barrier layer on cPI are calculated to be 8.5×10 −5 g/(m 2 ‐day) at 37.8°C/100% RH, the NBTIS are improved after LLO and are deterioration after WVTR test. It is believed that the moisture and hydrogen diffusion from the underlying layers including cPI and environment atmosphere can be effectively suppressed by SiNx‐SiOx (100nm–500nm) barrier, and a flexible array backplane is demonstrated by means of these methods.

Backplane

Buffer (optical fiber)

Barrier layer

10.1002/sdtp.13151

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A Continuum Model with Differential Evolution on Binary Phase Diagram of Ionic Surfactant Aqueous Solution

Yu Shi Thomas L. Beck

We develop a continuum thermodynamic model basing on the cell model at three perspectives. First, incorporate the Helfrich free energy as amphiphilic molecules aggregate surface free energy; Second, modify the Poisson-Boltzmann equation by introducing the ion-specic dispersion interaction energy of the counter-ion in aqueous region with the aggregate surface to obtain the concentration distributions of both the surfactant monomer and the counter-ions; Third, include the temperature dependence of chemical potential for the standard state transition, allowing for calculations on the binary phase diagram of a series of potassium carboxylate as well as of sodium carboxylate soaps. The differential evolution algorithm is applied to obtain the global minimum of the required criteria, including the boundary conditions of the electrostatic potential, the optimization of aggregate size with respect to the total free energy and the equilibrium of monomers transferring between the aggregate and aqueous region. The specific-ion effect are presented in the aggregate surface tensions and in the counter-ions distribution within the aqueous regions. The continuum model gives good agreement with the dimension sizes and phase boundaries (lamellar-cylindrical and cylindrical-micellar) which are determined with thermodynamic measurements.

Poisson–Boltzmann equation

Hofmeister series

10.26434/chemrxiv.12749939.v1

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