Chao Ding

Shandong University

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Qing Shen

University of Electro-Communications

Shuzi Hayase

University of Electro-Communications

Yaohong Zhang

National University of Defense Technology

Taro Toyoda

Kyoto University

Feng Liu

Shandong University

Mingwen Zhao

Shandong University

Yusheng Li

Nanjing University of Science and Technology

Takashi Minemoto

Ritsumeikan University

Kenji Yoshino

University of Miyazaki

Ruixiang Wang

Beijing University of Civil Engineering and Architecture

Cooperative Institutions

University of Electro-Communications

Chinese Academy of Sciences

Sichuan University

Kyushu Institute of Technology

University of Chinese Academy of Sciences

Shandong University

South China University of Technology

University of Science and Technology of China

Nanjing University

Nanjing University of Science and Technology

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Ultra-flat and long-lived plasmons in a strongly correlated oxide

Nature Communications (2022)

Han Gao Chao Ding Jaeseok Son Yangyu Zhu Mingzheng Wang

Plasmons in strongly correlated systems are attracting considerable attention due to their unconventional behavior caused by electronic correlation effects. Recently, flat plasmons with nearly dispersionless frequency-wave vector relations have drawn significant interest because of their intriguing physical origin and promising applications. However, these flat plasmons exist primarily in low-dimensional materials with limited wave vector magnitudes (q < ~0.7 Å-1). Here, we show that long-lived flat plasmons can propagate up to ~1.2 Å-1 in α-Ti2O3, a strongly correlated three-dimensional Mott-insulator, with an ultra-small energy fluctuation (<40 meV). The strong correlation effect renormalizes the electronic bands near Fermi level with a small bandwidth, which is responsible for the flat plasmons in α-Ti2O3. Moreover, these flat plasmons are not affected by Landau damping over a wide range of wave vectors (q < ~1.2 Å-1) due to symmetry constrains on the electron wavefunctions. Our work provides a strategy for exploring flat plasmons in strongly correlated systems, which in turn may give rise to novel plasmonic devices in which flat and long-lived plasmons are desirable.

10.1038/s41467-022-32359-0

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Citations (8)

Chiral electromagnetic near field of polaritons in two-dimensional anisotropic materials

Physical review. B./Physical review. B (2024)

Chao Ding Lei Sun Yueheng Du Mingwen Zhao

Chiral electromagnetic near fields, which are vital for chiral sensing, photochemistry, and photoemitters, are typically derived from the chiral configurations of plasmonic materials. This often necessitates complex structural engineering. In this study, we illustrate that polaritons in two-dimensional (2D) anisotropic materials can generate chiral near fields, thus eliminating the need for intricate structural designs. The near field on either side of the 2D material is single handed, with both sides exhibiting contrasting optical chirality. The scattering of the 2D material's edges to the polaritons enhances the dissymmetry factor that could be three orders of magnitude higher than that of circularly polarized light. Our research offers an innovative strategy to creating chiral near fields. locked icon locked icon locked icon locked icon locked icon locked icon locked icon locked icon Physics Subject Headings (PhySH)Light-matter interactionPlasmonicsSurface plasmon polariton

10.1103/physrevb.110.l241408

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Stronger Coupling of Quantum Dots in Hole Transport Layer Through Intermediate Ligand Exchange to Enhance the Efficiency of PbS Quantum Dot Solar Cells

Small Methods (2024)

Yuyao Wei Chao Ding Guozheng Shi Huan Bi Yusheng Li

Abstract Nowadays, the extensively used lead sulfide (PbS) quantum dot (QD) hole transport layer (HTL) relies on layer‐by‐layer method to replace long chain oleic acid (OA) ligands with short 1,2‐ethanedithiol (EDT) ligands for preparation. However, the inevitable significant volume shrinkage caused by this traditional method will result in undesired cracks and disordered QD arrangement in the film, along with adverse increased defect density and inhomogeneous energy landscape. To solve the problem, a novel method for EDT passivated PbS QD (PbS‐EDT) HTL preparation using small‐sized benzoic acid (BA) as intermediate ligands is proposed in this work. BA is substituted for OA ligands in solution followed by ligand exchange with EDT layer by layer. With the new method, smoother PbS‐EDT films with more ordered and closer QD packing are gained. It is demonstrated stronger coupling between QDs and reduced defects in the QD HTL owing to the intermediate BA ligand exchange. As a result, the suppressed nonradiative recombination and enhanced carrier mobility are achieved, contributing to ≈20% growth in short circuit current density ( J sc ) and a 23.4% higher power conversion efficiency (PCE) of 13.2%. This work provides a general framework for layer‐by‐layer QD film manufacturing optimization.

Lead sulfide

Benzoic acid

10.1002/smtd.202400015

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Citations (4)

Innovative Application and Micro-Catalytic Mechanism of MOF-74 Derived Ni-Co Bimetallic Oxides in Catalytic Wet Oxidation of High-Concentration 2,4-Dinitroanisole Wastewater

Applied Catalysis B Environment and Energy (2025)

Zhongtian Dong Zhiren Zhao Fengyun Wang Fenghe Wang Mingzhu Xia

Bimetallic strip

10.1016/j.apcatb.2025.125082

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Effect of the conduction band offset on interfacial recombination behavior of the planar perovskite solar cells

Nano Energy (2018)

Chao Ding Yaohong Zhang Feng Liu Yukiko Kitabatake Shuzi Hayase

Charge carrier

Band diagram

Band offset

10.1016/j.nanoen.2018.08.031

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Citations (146)

Enhanced Hot‐Phonon Bottleneck Effect on Slowing Hot Carrier Cooling in Metal Halide Perovskite Quantum Dots with Alloyed A‐Site

Advanced Materials (2023)

Hua Li Qing Wang Yusuke Oteki Chao Ding Dong Liu

Abstract A deep understanding of the effect of the A‐site cation cross‐exchange on the hot‐carrier relaxation dynamics in perovskite quantum dots (PQDs) has profound implications on the further development of disruptive photovoltaic technologies. In this study, the hot carrier cooling kinetics of pure FAPbI 3 (FA + , CH(NH 2 ) 2 + ), MAPbI 3 (MA + , CH 3 NH 3 + + ), CsPbI 3 (Cs + , Cesium) and alloyed FA 0.5 MA 0.5 PbI 3 , FA 0.5 Cs 0.5 PbI 3 , and MA 0.5 Cs 0.5 PbI 3 QDs are investigated using ultrafast transient absorption (TA) spectroscopy. The lifetimes of the initial fast cooling stage (<1 ps) of all the organic cation‐containing PQDs are shorter than those of the CsPbI 3 QDs, as verified by the electron‐phonon coupling strength extracted from the temperature‐dependent photoluminescence spectra. The lifetimes of the slow cooling stage of the alloyed PQDs are longer under illumination greater than 1 sun, which is ascribed to the introduction of co‐vibrational optical phonon modes in the alloyed PQDs. This facilitated efficient acoustic phonon upconversion and enhanced the hot‐phonon bottleneck effect, as demonstrated by first‐principles calculations.

10.1002/adma.202301834

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Citations (20)

Influences of Ternary Graft Copolymers on the Morphology and Properties of Polypropylene/Calcium Carbonate Composites

Polymer-Plastics Technology and Engineering (2006)

Haoqun Hong Hui He Dongmei Jia Chao Ding Feng Xue

ABSTRACT The ternary graft copolymers were synthesized by solid-phase grafting maleic anhydride (MAH), methyl methacrylate (MMA), and butyl acrylate (BA) onto polypropylene (PP), and applied in the interfacial modification of the PP/Calcium carbonate (CaCO3) composites. Fourier transform infrared (FTIR) spectroscopy was used to analyze the structure of the ternary graft copolymers. Scanning electron microscopy (SEM), thermogravimetry (TG), differential scanning calorimetry (DSC), and dynamic rheological testing were used to investigate the morphology and the properties of the composites. FTIR results confirmed the occurrence of the solid-phase graft copolymerization, and SEM exhibited the improvement of the compatibility between PP and CaCO3 by PPTM. The properties testing showed that PPTM significantly contributed to the reinforcement of the composites in terms of mechanical properties, thermal properties, and rheological properties by acting as interfacial modifiers and plasticizers. The preferable loadings of PPTM for the properties improvement of the PP/CaCO3 composites were between 7 and 9 phr.

Polypropylene

Maleic anhydride

Thermogravimetry

10.1080/03602550600553325

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Citations (9)

Bandgap Engineering of Sol-Gel Synthesized Zn 1−x Mg x O films as Electron-Transporting Layers for PbS Colloidal Quantum Dot Solar Cells

The Japan Society of Applied Physics (2017)

Chao Ding Yaohong Zhang Shuzi Hayase Yuhei Ogomi Taro Toyoda

Source

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Effect of Sepiolite on the Combustion and Thermal Decomposition of Intumescent Flame Retardant Polypropylene

Acta Physico-Chimica Sinica (2010)

Na Wu Chao Ding Rongjie Yang Jianwei Hao

Intumescent

Sepiolite

Polypropylene

10.3866/pku.whxb20100908

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Citations (4)

Electronic Coupling Between Perovskite Nanocrystal and Fullerene Modulates Hot Carrier Capture

Advanced Functional Materials (2024)

Yusheng Li Junke Jiang Dandan Wang Dong Liu Shota Yajima

Abstract The efficient harnessing of hot carriers holds transformative potential for next‐generation optoelectronic devices. Halide perovskites, with their remarkably long carrier lifetimes exceeding 10 picoseconds, stand at the forefront of this research frontier. Yet, a fundamental paradox persists: why does efficient hot carrier capture remain elusive despite these extended lifetimes? Here, this conundrum is unraveled by constructing a donor–acceptor model system: perovskite nanocrystal and fullerene hybrids. It is demonstrated that the challenge lies not only in the carrier lifetime itself but in the nature of the coupling between donor and acceptor components. Remarkably, it is discovered that the formation of ground‐state complexes, with effective coupling across a wide energy range, not only overcomes the initially forbidden hot carrier capture within these hybrids but also dramatically enhances it, achieving a ≈76% hot carrier capture efficiency. This finding shifts the paradigm of hot carrier capture from extending carrier lifetimes to engineering donor–acceptor coupling, illuminating a path toward practical hot carrier applications.

Acceptor

Carrier lifetime

10.1002/adfm.202415735

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Citations (1)