Junhao Chu
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Articles by Junhao Chu
Interfacial ferroelectricity at naturally-formed van der Waals interfaces
Abstract Sliding ferroelectrics emerge as compelling candidates for next-generation wafer-level non-volatile storage applications with low power consumption and high packing density.
Direct evaporation of single-crystal metal contacts for 2D semiconductors
Editor’s summary Abstract Supplementary Materials References and Notes Information & Authors Metrics & Citations Check Access References Figures Tables Media Share This article has 0 eLetter . Editor’s summary Integrating reliable metal contacts with two-dimensional (2D) semiconductors is a key challenge for the practical application of such devices due to persistent issues such as high contact resistance and low thermal stability. Zhang et al.
Defect passivation and optical management of triple-junction solar cells
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Abstract Perovskite/perovskite/silicon-based triple-junction solar cells are a promising low-cost route to surpass the Shockley–Queisser efficiency limit of single-junction photovoltaics, but their performance is constrained by non-radiative losses in wide-bandgap perovskites and sub-optimal light management across the multilayer stack1-3. Here, we introduce a passivating molecule, 4F-POEABr, which strongly suppresses surface-defect-mediated recombination of WBG perovskite films.
By Ye Xu, Zhijie Wang, Chen Deng, Lianlian Qi, Yi Mo, Qianqian Wang, Danni Yu, Yao Wang, Yifan Chen, Pengcheng Zhao, Ming Luo, Dongrui Jiang, Haiyun Li, Xiaobing Ding, Rui Xia, Dongdong Yan, Huifeng Yao, Shangqian Zhu, Kaihu Xian, Li Yin, Yingguo Yang, Anurag Krishna, Pietro P. Altermatt, Jianlu Wang, Zhigang Xie, XueLing Zhang, Junhao Chu, Hong Zhi Zhang, Jifan Gao, Yifeng Chen, Yiqin Tian, Pengcheng Ge, Delei Xin, Chengyue Zhou, Guangtao Yang, Wallace C. H. Choy
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Nature
Verified
Breathing ferroelectricity, flat-bands and multiple chiral phonons in van der Waals breathing kagome Nb 3 Cl 8
Abstract Van der Waals layered Nb3X8 (X=Cl, Br, I) are predicted to integrate multiple intriguing physical properties, notably multiferroicity and flat-bands that are highly promising for novel-principle memories and superconductors. However, direct experimental validations such as the proposed breathing ferroelectricity are lacking. Even the electronic band structure concerning flat-bands still remains inconsistent.
Giant and broadband circular dichroism from particle–hole symmetry breaking in Weyl semimetals
Abstract Circular dichroism originates from symmetry breaking in a material structure and leads to differential absorption of left-handed and right-handed circularly polarized light. However, circular dichroism in most materials is inherently weak and spectrally narrow, especially in the mid-to-far infrared. Here we uncover giant infrared circular dichroism in the magnetic-field-forced Weyl semimetal Mn(Bi,Sb)2Te4 driven by extreme particle–hole symmetry breaking.
A self-powered spherical compound eye with 8 ns-motion response for source-constrained drones
Abstract Ultrafast dynamic vision remains a major challenge for autonomous systems like drones, particularly considering their strict power and computational constraints. Here, we present an artificial spherical compound eye (ASCE) that enables nanosecond-scale, event-driven motion detection across a panoramic field of view (294°). Each pixel is self-powered and responds exclusively to dynamic light changes, enabling real-time sensing with minimal processing.
Microgravity-activated high-performance van der Waals InSe ferroelectric semiconductor
Abstract The space microgravity environment, scarcely attainable on Earth, is considered to have a positive effect on crystal growth, especially the van der Waals layered materials with low interlayer sliding energy barriers. Here, we investigate the structure and optical/electrical properties of van der Waals InSe semiconductor cultivated in microgravity environment on China space station.
Superior energy storage performance via engineering crossover region with competing orders in high-entropy multilayer capacitors - Nature Communications
Abstract As promising candidates for next-generation energy storage devices in electrical and electronic systems, lead-free multilayer ceramic capacitors face increasingly high performance requirements.
Sp1‐Mettl14 Feedback Loop Promotes Ferroptosis in Mycobacterium tuberculosis-Infected Microglia by Activating Acsl4
Conflicts of Interest The authors declare no conflicts of interest. Data Availability Statement The data that support the findings of this study are available from the corresponding author upon reasonable request. References 1, , , , and , “Insights From the 2024 Who Global Tuberculosis Report—More Comprehensive Action, Innovation, and Investments Required for Achieving Who End Tb Goals,” International Journal of Infectious Diseases 150 (2025): 107325, https://doi.org/10.1016/j.ijid.2024.107325.
Sodium ion modulation for interface engineering in high-efficiency Sb2(S,Se)3 solar cells
Antimony selenosulfide [${{\rm Sb}_2}{({\rm S},\!{\rm Se})_3}$] solar cells fabricated via the hydrothermal process have garnered significant attention due to their exceptional optoelectronic properties. However, ${{\rm Sb}_2}{({\rm S},\!{\rm Se})_3}$ thin films continue to encounter obstacles, such as low crystallinity, rough surface morphology, and uneven elemental distribution, all of which impede device performance.
High‐Purity Photoactive α‐Phase for Flexible Perovskite Photodetectors with Modified Electron Transport Layer
Conflict of Interest The authors declare no conflict of interest. Supporting Information Filename Description adfm202412015-sup-0001-SuppMat.docx2.6 MB Supporting Information References 1a) , , , , ACS Energy Lett. 2021, 6, 934; b) , , , , , Adv. Sci. 2022, 9, 34. 2, , , , , , , , , , Sci. Adv. 2016, 2, 10. 3, , , , , , , Nat. Rev. Chem. 2023, 7, 462. 4, , , , , , , , Chem. Mat. 2020, 32, 7739. 5, , , , , , , , , , , Energy Environ. Sci. 2023, 16, 252. 6, , , , , , , , , , , , , , , J. Am. Chem. Soc.
Regulating the crystal orientation of vapor-transport-deposited GeSe thin films by a post-annealing treatment
Recently, GeSe has emerged as a highly promising photovoltaic absorber material due to its excellent optoelectronic properties, nontoxicity, and high stability. Although many advantages make GeSe well suited for thin-film solar cells, the power conversion efficiency of the GeSe thin-film solar cell is still much below the theoretical maximum efficiency. One of the challenges lies in controlling the crystal orientation of GeSe to enhance solar cell performance.
A Novel Eye Hole Method for the Crosstalk Test of Small Element Infrared Focal Plane Arrays
All articles published by MDPI are made immediately available worldwide under an open access license. No special permission is required to reuse all or part of the article published by MDPI, including figures and tables. For articles published under an open access Creative Common CC BY license, any part of the article may be reused without permission provided that the original article is clearly cited. For more information, please refer to https://www.mdpi.com/openaccess.
Effects of working pressure on the material and defect properties of Sb2S3 thin-film solar cells achieved by the VTD method
Abstract Antimony sulfide (${{\rm Sb}_2}{{\rm S}_3}$), an emerging material for photovoltaic devices, has drawn growing research interest due to its inexpensive and high-throughput device production. In this study, the material and defect properties of ${{\rm Sb}_2}{{\rm S}_3}$ thin films prepared by the vapor transport deposition (VTD) method at different working pressures were studied.
Influence of doping for InSb on ultrafast carrier dynamics measured by time-resolved terahertz spectroscopy
Gaofang Li, Xiaobo Nie, Wei Zhou, Wenjie Zhang, Haoyang Cui, Nenghong Xia, Zhiming Huang, Junhao Chu, and Guohong Ma Author Affiliations Gaofang Li,1 Xiaobo Nie,1 Wei Zhou,2 Wenjie Zhang,3 Haoyang Cui,1 Nenghong Xia,1 Zhiming Huang,2,4 Junhao Chu,2 and Guohong Ma3,5 1College of Electronic and Information Engineering, Shanghai University of Electric Power, Shanghai 200090, China 2State Key Laboratory of Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences,...
Investigation of CsPbBr3 films with controllable morphology and its influence on the photovoltaic properties for carbon-based planar perovskite solar cells
Abstract Recently, inorganic ${\rm{CsPbB}}{{\rm{r}}_3}$ perovskites have received much research interest in the photovoltaic field owing to their excellent stability. However, it is still challenging to prepare high-performance ${\rm{CsPbB}}{{\rm{r}}_3}$ films with good crystallinity and superior morphology at moderate temperatures. In this work, we report a novel, to the best of our knowledge, multistep spin-coating deposition method to prepare ${\rm{CsPbB}}{{\rm{r}}_3}$ perovskite film.
Diagnosis of electrically active defects in CH3NH3PbI3 perovskite solar cells via admittance spectroscopy measurements
Abstract The defect properties of ${{\rm CH}_3}{{\rm NH}_3}{{\rm PbI}_3}$ solar cells with efficiencies ranging from 7.70% to 12.51% were investigated using admittance spectroscopy measurements. Trap levels of the same kind with activation energies varied in the range of 0.16–0.23 eV above the valence band were found for different samples and identified as an interface-type defect.
An 8.7 % efficiency co-electrodeposited Cu2ZnSnS4 photovoltaic device fabricated via a pressurized post-sulfurization process
C. Zhang, J. Tao and J. Chu, J. Mater. Chem. C, 2018, Accepted Manuscript , DOI: 10.1039/C8TC05058A If you are not the author of this article and you wish to reproduce material from it in a third party non-RSC publication you must formally request permission using Copyright Clearance Center. Go to our Instructions for using Copyright Clearance Center page for details.
Pump fluence dependence of ultrafast carrier dynamics in InSb measured by optical pump–terahertz probe spectroscopy
Author Affiliations Gaofang Li,1,2 Wei Zhou,1 Wenjie Zhang,3 Guohong Ma,3 Haoyang Cui,2 Yanqing Gao,1 Zhiming Huang,1,* and Junhao Chu1 1State Key Laboratory of Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, China 2College of Electronic and Information Engineering, Shanghai University of Electric Power, Shanghai 200090, China 3Laboratory of Ultrafast Photonics, Department of Physics, Shanghai University, Shanghai 200444, China...
Photoluminescence spectra of the Mn<sup>2+</sup>d-d multiplets transitions of zinc-blende MnTe epitaxial films: laser and deuterium lamp excitation study
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