Article
Chemistry, Physical
Xiaoqi Tang, Siyu He, Yunzhou Deng, Xiuyuan Lu, Xitong Zhu, Wangxiao Jin, Yizheng Jin
Summary: Quantum-dot light-emitting diodes (QLEDs) have potential for next-generation display and lighting technologies. A new method of in situ diffusion of magnesium atoms into the ZnO-based electron-transport layers (ETLs) improves the conductivities and luminous efficiencies of QLEDs without sacrificing their quantum efficiencies. This approach can also be applied to other solution-processed LEDs using ZnO-based ETLs.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Review
Chemistry, Inorganic & Nuclear
Jayaraman Jayabharathi, Venugopal Thanikachalam, Shanmugam Thilagavathy
Summary: This review presents a low-cost fabrication process for efficient phosphorescent organic light-emitting diodes (PhOLEDs) based on Ir(III) complexes. The excellent charge transportation and injection abilities of Ir (III) complexes contribute to their usage as both charge transport materials and emissive materials in PhOLEDs. The reduced intermolecular aggregation and excellent hole and electron transporting abilities of Ir(III) complexes lead to highly efficient PhOLEDs. In doped PhOLEDs, the efficiency is determined by exciton confinement, charge trapping, and dopant concentration.
COORDINATION CHEMISTRY REVIEWS
(2023)
Article
Optics
Yuan Xie, Wansheng Liu, Wanyuan Deng, Haimei Wu, Weiping Wang, Yichuan Si, Xiaowei Zhan, Chao Gao, Xian-Kai Chen, Hongbin Wu, Junbiao Peng, Yong Cao
Summary: This study reports on the potential applications of high-efficiency organic light-emitting diodes (OLEG) in the short-wavelength infrared (SWIR) region. By using specific types of molecules, researchers have successfully fabricated high radiance SWIR OLEGs, which have various applications in biosensors, biomedical imaging and spectroscopy, and surveillance.
Article
Chemistry, Multidisciplinary
Jiang Pu, Hao Ou, Tomoyuki Yamada, Naoki Wada, Hibiki Naito, Hiroto Ogura, Takahiko Endo, Zheng Liu, Toshifumi Irisawa, Kazuhiro Yanagi, Yusuke Nakanishi, Yanlin Gao, Mina Maruyama, Susumu Okada, Keisuke Shinokita, Kazunari Matsuda, Yasumitsu Miyata, Taishi Takenobu
Summary: A color-tunable light-emitting device is fabricated using compositionally graded TMDC alloys, which allows for spatial variation in light emission energy. By controlling the positions of light emission, a continuous and reversible color-tunable light-emitting device is successfully created, providing a new approach for broadband optical applications based on monolayer semiconductors.
ADVANCED MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Wenxu Yin, Xiaoyu Zhang, Xuyong Yang, Andrey L. Rogach, Weitao Zheng
Summary: This article summarizes the recent progress in the development of near-infrared quantum dot LEDs, focusing on how their device structure and emitter properties facilitate improvement of device performance. The challenges and opportunities associated with these LEDs are also discussed.
Article
Chemistry, Multidisciplinary
Islam Mohammad Shafiqul, Raj Deep, Jie Lin, Toshiyuki Yoshida, Yasuhisa Fujita
Summary: In this study, nitrogen-doped zinc oxide nanoparticles were successfully synthesized using the gas evaporation method with DC arc plasma. The nitrogen concentration was found to have an impact on the Raman spectra and photoluminescence spectra of the nanoparticles.
Review
Chemistry, Multidisciplinary
Mengxin Xu, Xinyi Li, Shihao Liu, Letian Zhang, Wenfa Xie
Summary: Near-infrared (NIR) light-emitting devices with emission wavelengths ranging from 700 nm to 2500 nm have gained significant interest for various applications. This review focuses on molecular design strategies for NIR materials, recent advancements in highly luminescent NIR materials, structural designs and underlying device physics of high-performing NIR organic light-emitting devices (OLEDs), practical applications in biomedicine and component determination, as well as current limitations and prospects for the development of NIR materials, devices, and applications.
MATERIALS CHEMISTRY FRONTIERS
(2023)
Review
Nanoscience & Nanotechnology
Baodan Zhao, Maria Vasilopoulou, Azhar Fakharuddin, Feng Gao, Abd. Rashid Bin Mohd Yusoff, Richard H. Friend, Dawei Di
Summary: Perovskite light-emitting diodes (LEDs) have shown great potential for display and lighting applications with external quantum efficiencies exceeding 20% for various colors. However, the majority of internally generated photons are trapped in the devices and lose energy through lossy channels, suggesting the need for effective light management strategies. By analyzing the intrinsic optical properties of perovskite materials and the extrinsic properties related to device structures, this Review highlights the possibility of substantially exceeding the conventional limits of planar organic LED devices and suggests new approaches for achieving ultrahigh efficiencies in perovskite LEDs.
NATURE NANOTECHNOLOGY
(2023)
Article
Nanoscience & Nanotechnology
Chengtao Xia, Jinxin Chen, Tong Zhao, Linlin Fan, Deren Yang, Xiangyang Ma
Summary: This study reports on a LED based on erbium-doped zinc oxide/SiO2/n(+)-Si heterostructure, with a significant enhancement of erbium-related emissions achieved through titanium codoping.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Multidisciplinary Sciences
Yaxiao Lian, Dongchen Lan, Shiyu Xing, Bingbing Guo, Zhixiang Ren, Runchen Lai, Chen Zou, Baodan Zhao, Richard H. Friend, Dawei Di
Summary: Research shows that many types of LEDs can emit light at low voltages due to the radiative recombination of non-thermal-equilibrium band-edge carriers. These findings indicate the potential of low-voltage LEDs in various applications.
NATURE COMMUNICATIONS
(2022)
Review
Chemistry, Multidisciplinary
Yuan-Qiu-Qiang Yi, Wenming Su
Summary: This article introduces the recent progress of cross-linking strategies used in quantum-dot light-emitting diodes (QD-LEDs) to address the challenges in high-resolution display panel manufacturing process.
MATERIALS CHEMISTRY FRONTIERS
(2023)
Article
Physics, Applied
Wenhui Wu, Tianyuan Liang, Huaxin Wu, Baolu Fan, Yumeng Zhang, Jiyang Fan
Summary: Inorganic lead halide perovskite nanowires are studied as emission layers in LEDs, forming crystallographic orientation-consistent arrays. At high nanowire concentration, pure green light is emitted with carriers transporting through FN quantum tunneling and direct injection; at lower concentration, the luminescence shifts from green to white with increasing bias. These results enhance understanding of perovskite nanowire-based LEDs' characteristics.
APPLIED PHYSICS LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Jiong Li, Chenghao Duan, Qiaoyun Wen, Ligang Yuan, Shibing Zou, Chang Chen, Weiguang Xie, Dongxu Lin, Christopher C. S. Chan, Kam Sing Wong, Keyou Yan
Summary: By using solution engineered perovskite nanocrystals, efficient integration of electroluminescence and photovoltaic performance in a single device has been achieved, which shows great potential for various applications.
Article
Multidisciplinary Sciences
Jieyuan Cui, Yang Liu, Yunzhou Deng, Chen Lin, Zhishan Fang, Chensheng Xiang, Peng Bai, Kai Du, Xiaobing Zuo, Kaichuan Wen, Shaolong Gong, Haiping He, Zhizhen Ye, Yunan Gao, He Tian, Baodan Zhao, Jianpu Wang, Yizheng Jin
Summary: Solution-processed planar perovskite light-emitting diodes (LEDs) offer high performance and cost-effective electroluminescent devices suitable for large-area display and lighting applications. LEDs utilizing perovskite nanoplatelets with a high ratio of horizontal transition dipole moments (TDMs) have demonstrated an enhanced light-outcoupling efficiency and achieved a peak EQE of 23.6%, making them highly efficient planar perovskite LEDs.
Article
Materials Science, Multidisciplinary
Katarzyna Dyndal, Gabriela Lewinska, Stanis lawa Kluska, Bouchta Sahraoui, Konstanty Waldemar Marszalek
Summary: The degradation of organic light-emitting diodes (OLEDs) caused by the interaction of the polymer with atmospheric factors is the main problem. This study investigates the possibility of using a hydrogenated amorphous carbon nitrogen-modified (a-C:N:H) layer as a protective coating. Different diode structures were prepared, and their characteristics were evaluated. The results show promising applications of a-C:N:H layers in OLEDs technology.
Article
Chemistry, Physical
Ye Feng, Wei Li, Jiansheng Zhao, Jinze Li, Gang Bai, Jie Xu
Summary: This paper investigates the influence of multilayer hyperbolic metamaterials (HMMs) on the spontaneous radiation of quantum wells, improving the coupling efficiency of incident electromagnetic waves and free electrons on metal nano-surfaces. Numerical simulations on Ag, Au, and Cu thin films in the visible light bands revealed that different shapes of multilayer HMMs have different field enhancement effects and impact on resonance wavelength position. Purcell analysis showed that parameters like metal/dielectric layer thickness, dipole-HMMs distance, and multilayer HMMs length affect plasmon resonance intensity and wavelength position.
Article
Chemistry, Analytical
Qingying Ren, Wen Zuo, Jie Xu, Leisheng Jin, Wei Li, Debo Wang
Summary: A novel microwave power detection system has been proposed in this study to measure power in the 5G communication frequency band, with a detection frequency band ranging from 1.4 GHz to 5.3 GHz, a dynamic measurement range of 70 dB, and a sensitivity of 22.3 mV/dBm. The performance of this system in the 5G communication frequency band is significantly improved compared to other systems, showing potential application value in microwave signal detection for 5G communication systems.
Article
Engineering, Electrical & Electronic
Xiangfu Wang, Jihong Yu, Yixuan Cui, Wei Li
Summary: Flexible pressure sensors with high sensitivity, flexibility, and lightness have been extensively researched in various fields. The latest research progress, challenges, and future prospects of flexible pressure sensors are discussed, emphasizing the importance of exploring new sensing mechanisms and functional materials.
SENSORS AND ACTUATORS A-PHYSICAL
(2021)
Article
Chemistry, Physical
Dan Wang, Wei Li, Qinrong Zhang, Benquan Liang, Zhenkai Peng, Jie Xu, Chen Zhu, Jinze Li
Summary: A highly sensitive surface plasmon resonance sensor based on a miniature tapered single-mode fiber was proposed in this paper, with graphene, silver, and titanium dioxide layers to enhance sensor performance. Simulation results showed that high-performance SPR can be achieved with 15 layers of graphene, a 40 nm silver layer, and a 20 nm titanium dioxide layer.
Article
Chemistry, Multidisciplinary
Chenghao Yao, Wei Li, Kang Duan, Chen Zhu, Jinze Li, Qingyin Ren, Gang Bai
Summary: A method using Ti2NS2 as the sulfur cathode host material is proposed to improve the performance of Li-S batteries by effectively inhibiting the shuttle effect through moderate adsorption energies for Li2Sx species. This work provides a reference for the design of high-performance sulfur cathode materials.
Article
Materials Science, Multidisciplinary
Kang Duan, Wei Li, Chen Zhu, Jinze Li, Jie Xu, Xiangfu Wang
Summary: This study evaluates the sensing ability of single-layer P and N atom doped WSe2 for common gases and discusses the changes in adsorption behavior. The results show that dopants can improve the adsorption strength between gas molecules and substrates, with NO2 exhibiting the best adsorption effect.
RESULTS IN PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Benquan Liang, Wei Li, Qingyin Ren, Chen Zhu, Jinze Li
Summary: This paper investigates the effect of Ta doping on the gas sensitivity of two-dimensional MoSe2 through first-principles calculation. The results show that Ta atoms can be stably doped in Se vacancies on two-dimensional MoSe2 supercells. The study also examines the adsorption properties of four toxic gases on Ta-doped MoSe2 and finds that Ta doping improves the gas sensitivity of two-dimensional MoSe2.
RESULTS IN PHYSICS
(2022)
Article
Multidisciplinary Sciences
Chen Zhu, Wen Huang, Wei Li, Xuegong Yu, Xing'ao Li
Summary: Synaptic devices, as key connecting points in neuromorphic computing systems, have been extensively studied in recent years. The development of optoelectronic synaptic devices with optical outputs has gained attraction due to the advantages of optical signals. Colloidal quantum dots (CQDs), potential luminescent materials for information displays, have emerged as appealing candidates for optoelectronic synaptic devices. Furthermore, light-emitting transistors exhibit significant application potential in these synaptic devices. This article discusses light-emitting artificial synapses based on these structures, analyzing and prospecting their mechanisms, performance, and future development in detail.
Article
Physics, Multidisciplinary
Qinrong Zhang, Wei Li, Qingyin Ren, Jiajin Zheng, Qiyun Xie, Xiangfu Wang
Summary: This paper introduces a D-shape dual side-polished (DSP) photonic crystal fiber sensor with high sensitivity and high range refractive index. By plating with Au and TiO2, the surface plasmon resonance effect and sensitivity are enhanced. The sensor has achieved good wavelength sensitivity through optimizing geometric parameters, and outperforms other PCF sensors reported in the same refractive index detection range.
FRONTIERS IN PHYSICS
(2022)
Article
Physics, Applied
Yankai Zhu, Gang Bai, Wei Li, Cunfa Gao
Summary: A phase-field model was used to explore the effect of electric, elastic, and temperature fields on the electrical conductivity of ferroelectric domain walls. It was found that a toroidal electric field can switch the conductivity states of the domain walls, and the conductivity can be adjusted by temperature, misfit strain, and thickness. This research provides valuable reference and technical guidance for the design and application of ferroelectric domain wall memories.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Energy & Fuels
Jie Xu, Chuxiang Zhou, Wei Li
Summary: In this study, a state-of-the-art deterministic method is proposed for extracting the parameters of a photovoltaic single diode model from experimental current-voltage curves. The method utilizes numerical derivative information and linear least squares technique to obtain a high-quality solution. It further enhances the solution through a two-step nonlinear optimization procedure using trust-region-reflective or Levenberg-Marquardt algorithm. The method outperforms previous methods in terms of accuracy and computation cost, and its robustness is demonstrated through a large-scale dataset. A MATLAB app is also developed and made freely available to the public.
Article
Physics, Multidisciplinary
Jinyu Li, Chunlei Zhao, Wei Li, Qingying Ren, Jie Xu, Wei Xu
Summary: This study investigates the geometric structure and electronic properties of intrinsic silicene and gallium-doped silicene using first-principles calculations. The adsorption properties of CO, SO2, NH3, and H2O molecules on these materials were analyzed. The results demonstrate that gallium-doped silicene exhibits stronger adsorption capacity compared to intrinsic silicene.
Article
Optics
Hu Qiu, Wei Li, Chen Zhu, Jie Xu, Jinze Li, Gang Bai
Summary: A highly sensitive surface plasmon resonance-based photonic crystal fiber sensor for low refractive index sensing and detection is proposed in this paper. The sensor utilizes Au and TiO2 coatings in the shape of notched rings to excite surface plasmon polariton modes and enhance sensitivity. The sensor's performance was evaluated using the finite element method, achieving optimal wavelength sensitivity of 21,500 nm/RIU and resolution of 4.65 x 10(-6) RIU within the low RI detection range of 1.18-1.28. Potential applications in medical diagnostics and identification of low RI environments are suggested by the study findings.
JOURNAL OF OPTICS-INDIA
(2023)
Article
Materials Science, Multidisciplinary
Gang Bai, Yuhang Han, Wei Li, Cunfa Gao
Summary: The complete thermodynamic potential of (111) ferroelectric thin films, considering anisotropic strain and external stress, is developed. The effects of anisotropic strain on the equilibrium phases and functionalities of the films are investigated and analyzed.
Article
Physics, Multidisciplinary
Lin Cui, Bai Gang, Li Wei, Gao Cun-Fa
Summary: This study investigated the microscopic domain evolution in a ferroelectric film using Landau-Khalatnikov theory and found that compressive strain enhances the negative capacitance effect (NCE), while tensile strain weakens it. Furthermore, under certain strain conditions, NCE becomes stronger at lower temperatures.
ACTA PHYSICA SINICA
(2021)
