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Kumar M, Park H, Seo H. A Single-Pixel Event Photoactive Device for Real-Time, In-Sensor Spatiotemporal Optical Information Processing. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024:e2406607. [PMID: 39171775 DOI: 10.1002/adma.202406607] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2024] [Revised: 07/28/2024] [Indexed: 08/23/2024]
Abstract
The increasing demand for energy-efficient, sophisticated optical sensing technologies in various applications, from machine vision to optical communication, highlights the necessity for innovations in spatiotemporal information sensing and processing at a nearly single-pixel scale. Traditional methods, including multi-pixel photodetector arrays and event-based camera systems, often fail to provide rapid, real-time detection and processing of dynamic events within the sensor. This shortcoming is particularly notable in handling high-dimensional spatiotemporal data, where the dependency on sequential data input and external processing tools leads to latency, reduced throughput, and heightened energy consumption, thereby impeding real-time parallel data processing capabilities. Here, a carrier-selective, single-pixel, position-sensitive planar photoactive device that integrates spatiotemporal event sensing with inherent short-term memory capabilities is introduced. The proof-of-concept single-pixel event photoactive device enables in-sensor spatiotemporal parallel optical information processing, efficiently managing multibit (>4 bit) data simultaneously and facilitating ultrafast (≈0.4 µs) recognition of input patterns with low energy consumption (25 femtojoules). Additionally, by adjusting the operating speed from continuous to pulsed light illumination, the sensor array can detect trajectories and absolute position of events, offering in-sensor optical flow detection. This single-pixel event photodetector marks significant advancement toward developing compact, energy-efficient, ultrafast sensors suitable for a wide range of in sensor-based photonic applications.
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Affiliation(s)
- Mohit Kumar
- Department of Materials Science and Engineering, Ajou University, Suwon, 16499, Republic of Korea
- Department of Energy Systems Research, Ajou University, Suwon, 16499, Republic of Korea
| | - Hayoung Park
- Department of Energy Systems Research, Ajou University, Suwon, 16499, Republic of Korea
| | - Hyungtak Seo
- Department of Materials Science and Engineering, Ajou University, Suwon, 16499, Republic of Korea
- Department of Energy Systems Research, Ajou University, Suwon, 16499, Republic of Korea
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2
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Zhang P, Guo J, Zhang L, Tao L, Sui Y, Fu Q, Wang X, Song B. Ultrafast Multifunctional Photodetector Based on the NiAl 2O 4/4H-SiC Heterojunction. ACS APPLIED MATERIALS & INTERFACES 2024; 16:27813-27820. [PMID: 38603540 DOI: 10.1021/acsami.4c00697] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/13/2024]
Abstract
Solar-blind photodetectors based on wide bandgap semiconductors have recently attracted a lot of interest. Nickel-containing spinel phase oxides, such as NiAl2O4, are stable p-type semiconductors. This paper describes a multifunctional solar-blind photodetector based on a NiAl2O4/4H-SiC heterojunction that utilizes photovoltaic effects. The position sensitivity reaches a value of 1589.7 mV/mm under 405 nm laser illumination, while the relaxation times of vertical photovoltaic (VPV) effect and lateral photovoltaic (LPV) effect under 266 nm laser illumination are only 0.32 and 0.42 μs, respectively. This junction was used to create a space optical communication system with sunlight having little effect on its optoelectronic properties. The ultrafast photovoltaic relaxation time makes NiAl2O4/4H-SiC a promising candidate for self-powered high-performance solar-blind detectors.
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Affiliation(s)
- Pengbo Zhang
- School of Physics, Harbin Institute of Technology, Harbin 150001, China
| | - Jiarui Guo
- School of Physics, Harbin Institute of Technology, Harbin 150001, China
| | - Lingli Zhang
- School of Physics, Harbin Institute of Technology, Harbin 150001, China
| | - Lingling Tao
- School of Physics, Harbin Institute of Technology, Harbin 150001, China
| | - Yu Sui
- School of Physics, Harbin Institute of Technology, Harbin 150001, China
| | - Qiang Fu
- School of Physics, Harbin Institute of Technology, Harbin 150001, China
| | - Xianjie Wang
- School of Physics, Harbin Institute of Technology, Harbin 150001, China
- Frontiers Science Center for Matter Behave in Space Environment, Harbin Institute of Technology, Harbin 150001, China
- Zhengzhou Research Institute, Harbin Institute of Technology, Zhengzhou 450046, China
| | - Bo Song
- School of Physics, Harbin Institute of Technology, Harbin 150001, China
- Frontiers Science Center for Matter Behave in Space Environment, Harbin Institute of Technology, Harbin 150001, China
- Zhengzhou Research Institute, Harbin Institute of Technology, Zhengzhou 450046, China
- National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin 150001, China
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3
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Han X, Ma X, Miao Q, Zhang X, He D, Yu X, Wang Y. Tunable Photocarrier Dynamics in CuS Nanoflakes under Pressure Modulation. ACS OMEGA 2024; 9:22248-22255. [PMID: 38799336 PMCID: PMC11112578 DOI: 10.1021/acsomega.4c01294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/09/2024] [Revised: 04/17/2024] [Accepted: 04/30/2024] [Indexed: 05/29/2024]
Abstract
Two-dimensional materials with a unique layered structure have attracted intense attention all around the world due to their extraordinary physical properties. Most importantly, the internal Coulomb coupling can be regulated, and thus electronic transition can be realized by manipulating the interlayer interaction effectively through adding external fields. At present, the properties of two-dimensional materials can be tuned through a variety of methods, such as adding pressure, strain, and electromagnetic fields. For optoelectronic applications, the lifetime of the photogenerated carriers is one of the most crucial parameters for the materials. Here, we demonstrate effective modulation of the optical band gap structure and photocarrier dynamics in CuS nanoflakes by applying hydrostatic pressure via a diamond anvil cell. The peak differential reflection signal shows a linear blueshift with the pressure, suggesting effective tuning of interlayer interaction inside CuS by pressure engineering. The results of transient absorption show that the photocarrier lifetime decreases significantly with pressure, suggesting that the dissociation process of the photogenerated carriers accelerates. It could be contributed to the phase transition or the decrease of the phonon vibration frequency caused by the pressure. Further, Raman spectra reveal the change of Cu-S and S-S bonds after adding pressure, indicating the possible occurrence of structural phase transition. Interestingly, all of the variation modes are reversible after releasing pressure. This work has provided an excellent sight to show the regulation of pressure on the photoelectric properties of CuS, exploring CuS to wider applications that can lead toward the realization of future excitonic and photoelectric devices modulated by high pressure.
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Affiliation(s)
- Xiuxiu Han
- Key
Laboratory of Luminescence and Optical Information, Ministry of Education,
Institute of Optoelectronic Technology, Beijing Jiaotong University, Beijing 100044, China
| | - Xiaoli Ma
- Beijing
National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Qing Miao
- Key
Laboratory of Luminescence and Optical Information, Ministry of Education,
Institute of Optoelectronic Technology, Beijing Jiaotong University, Beijing 100044, China
| | - Xiaoxian Zhang
- Key
Laboratory of Luminescence and Optical Information, Ministry of Education,
Institute of Optoelectronic Technology, Beijing Jiaotong University, Beijing 100044, China
| | - Dawei He
- Key
Laboratory of Luminescence and Optical Information, Ministry of Education,
Institute of Optoelectronic Technology, Beijing Jiaotong University, Beijing 100044, China
| | - Xiaohui Yu
- Beijing
National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- School
of Physical Sciences, University of Chinese
Academy of Sciences, Beijing 100190, China
- Songshan
Lake Materials Laboratory, Dongguan 523808, China
| | - Yongsheng Wang
- Key
Laboratory of Luminescence and Optical Information, Ministry of Education,
Institute of Optoelectronic Technology, Beijing Jiaotong University, Beijing 100044, China
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4
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Zhang G, Guo S, Zhang T, Wang Q, Zhang Z, Liu J, Wang S, Qiao S. Exploring the pyro-phototronic effect for giant lateral photoresponse in an ITO/CdS/Si heterojunction position-sensitive detector. OPTICS EXPRESS 2024; 32:17058-17071. [PMID: 38858898 DOI: 10.1364/oe.522027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2024] [Accepted: 04/09/2024] [Indexed: 06/12/2024]
Abstract
The demand for a high-performance position sensitive detector (PSD), a novel type of photoelectric sensor, is increasing due to advancements in digitization and automation technology. Cadmium sulfide (CdS), a non-centrosymmetric material, holds significant potential in photoelectric devices. However, the pyroelectric effect of CdS in PSDs and its influence on lateral photoresponse are still unknown. In this work, we fabricated an ITO/CdS/Si heterojunction using chemical bath deposition (CBD) and investigated the pyro-phototronic effect under nonuniform illumination. The theory of electron-hole pairs' generation, separation, and carrier diffusion was carefully considered to understand the underlying mechanisms. Our experimental findings revealed that the device exhibited an exceptionally high position sensitivity (PS) of 1061.3 mV/mm, surpassing the generally observed PS of 655.1 mV/mm induced by single photovoltaic effect by 160.5%. Meanwhile, the PSD demonstrated rapid response times of 0.01 and 0.04 ms, respectively. Moreover, the influence of ambient temperature and electrode distance on the pyro-phototronic effect was well analyzed. Notably, the PSD exhibited remarkable stability even at ambient temperatures up to 150 °C. Despite the considerable working distance of 11 mm, the PS of the PSD remained at 128.99 mV/mm. These findings provide valuable theoretical and experimental foundations for optimizing the design and implementation of high-performance large working distance PSDs.
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Gryczak DW, Lenzi EK, Rosseto MP, Evangelista LR, Zola RS. Non-Markovian Diffusion and Adsorption-Desorption Dynamics: Analytical and Numerical Results. ENTROPY (BASEL, SWITZERLAND) 2024; 26:294. [PMID: 38667848 PMCID: PMC11048754 DOI: 10.3390/e26040294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2024] [Revised: 03/21/2024] [Accepted: 03/23/2024] [Indexed: 04/28/2024]
Abstract
The interplay of diffusion with phenomena like stochastic adsorption-desorption, absorption, and reaction-diffusion is essential for life and manifests in diverse natural contexts. Many factors must be considered, including geometry, dimensionality, and the interplay of diffusion across bulk and surfaces. To address this complexity, we investigate the diffusion process in heterogeneous media, focusing on non-Markovian diffusion. This process is limited by a surface interaction with the bulk, described by a specific boundary condition relevant to systems such as living cells and biomaterials. The surface can adsorb and desorb particles, and the adsorbed particles may undergo lateral diffusion before returning to the bulk. Different behaviors of the system are identified through analytical and numerical approaches.
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Affiliation(s)
| | - Ervin K. Lenzi
- Departamento de Física, Universidade Estadual de Ponta Grossa, Ponta Grossa 84030-900, PR, Brazil;
| | - Michely P. Rosseto
- Departamento de Física, Universidade Estadual de Ponta Grossa, Ponta Grossa 84030-900, PR, Brazil;
| | - Luiz R. Evangelista
- Departamento de Física, Universidade Estadual de Maringá, Maringá 87020-900, PR, Brazil;
- Istituto dei Sistemi Complessi (ISC–CNR), Via dei Taurini, 19, 00185 Rome, Italy
- Department of Molecular Science and Nanosystems, Ca’ Foscari University of Venice, Via Torino 155, 30175 Mestre (VE), Italy
| | - Rafael S. Zola
- Department of Physics, Universidade Tecnológica Federal do Paraná, Apucarana 86812-460, PR, Brazil;
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6
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Fang N, Wu C, Zhang Y, Li Z, Zhou Z. Perspectives: Light Control of Magnetism and Device Development. ACS NANO 2024; 18:8600-8625. [PMID: 38469753 DOI: 10.1021/acsnano.3c13002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/13/2024]
Abstract
Accurately controlling magnetic and spin states presents a significant challenge in spintronics, especially as demands for higher data storage density and increased processing speeds grow. Approaches such as light control are gradually supplanting traditional magnetic field methods. Traditionally, the modulation of magnetism was predominantly achieved through polarized light with the help of ultrafast light technologies. With the growing demand for energy efficiency and multifunctionality in spintronic devices, integrating photovoltaic materials into magnetoelectric systems has introduced more physical effects. This development suggests that sunlight will play an increasingly pivotal role in manipulating spin orientation in the future. This review introduces and concludes the influence of various light types on magnetism, exploring mechanisms such as magneto-optical (MO) effects, light-induced magnetic phase transitions, and spin photovoltaic effects. This review briefly summarizes recent advancements in the light control of magnetism, especially sunlight, and their potential applications, providing an optimistic perspective on future research directions in this area.
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Affiliation(s)
- Ning Fang
- School of Materials Science and Engineering, Changzhou University, Changzhou 213164, China
| | - Changqing Wu
- School of Environmental Science and Engineering, Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China
| | - Yuzhe Zhang
- School of Environmental Science and Engineering, Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China
| | - Zhongyu Li
- School of Environmental Science and Engineering, Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China
| | - Ziyao Zhou
- School of Materials Science and Engineering, Changzhou University, Changzhou 213164, China
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7
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Hu B, Liu Y, Zhang B, Guo F, Zhang M, Yu W, Li S, Hao L. A high-sensitivity SnSe/Si heterojunction position-sensitive detector for ultra-low power detection. NANOSCALE 2024; 16:4170-4175. [PMID: 38334754 DOI: 10.1039/d3nr05906e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/10/2024]
Abstract
Position-sensitive detectors (PSDs) based on the lateral photovoltaic effect are crucial components in non-contact distance measurement, process control, guidance systems, and other related applications. However, PSDs are challenging due to the narrow spectral range and low sensitivity, limiting further practical application. Here, we present an ultra-sensitive SnSe/Si PSD device. A large-area uniform SnSe nanorod (NR) array film was grown on Si using a glancing-angle magnetron sputtering deposition technique and a SnSe/Si heterojunction PSD device was fabricated. PSDs exhibit an excellent photoresponse in a wide spectral range of 405-980 nm, showing an ultrahigh position sensitivity of 1517.4 mV mm-1 and an excellent spectral sensitivity of 4 × 104 V W-1. More importantly, the detection limit power of the device is as low as 10 nW, indicating the outstanding potential for weak light detection. Based on the unique structural features and interface effect, the mechanisms for the remarkable performance of the fabricated SnSe/Si PSD device are clarified. This work indicates the large potential of SnSe/Si heterojunctions as a promising material for ultrasensitive optical position-sensitive devices.
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Affiliation(s)
- Bing Hu
- School of Materials Science and Engineering, China University of Petroleum, Qingdao, Shandong, 266580, P. R. China.
| | - Yunjie Liu
- College of Science, China University of Petroleum, Qingdao, Shandong, 266580, P. R. China
| | - Bo Zhang
- School of Materials Science and Engineering, China University of Petroleum, Qingdao, Shandong, 266580, P. R. China.
| | - Fuhai Guo
- School of Materials Science and Engineering, China University of Petroleum, Qingdao, Shandong, 266580, P. R. China.
| | - Mingcong Zhang
- School of Materials Science and Engineering, China University of Petroleum, Qingdao, Shandong, 266580, P. R. China.
| | - Weizhuo Yu
- School of Materials Science and Engineering, China University of Petroleum, Qingdao, Shandong, 266580, P. R. China.
| | - Siqi Li
- School of Materials Science and Engineering, China University of Petroleum, Qingdao, Shandong, 266580, P. R. China.
| | - Lanzhong Hao
- School of Materials Science and Engineering, China University of Petroleum, Qingdao, Shandong, 266580, P. R. China.
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8
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Zhu Z, Ouyang Z, Hu J, Qi H, Pei Y, Zhang L, Wang X. Large lateral photovoltaic effect with ultrafast optical relaxation time in SnS 2/n-Si junctions. APPLIED OPTICS 2023; 62:6528-6533. [PMID: 37706847 DOI: 10.1364/ao.498719] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Accepted: 08/04/2023] [Indexed: 09/15/2023]
Abstract
A large lateral photovoltaic effect (LPE) with a fast optical response time is necessary to develop high-performance position-sensitive detectors. In this paper, we report an LPE with a high self-powered position sensitivity and ultrafast optical relaxation time in S n S 2/n-S i junctions prepared using pulsed laser deposition. A large built-in electric field was generated at the S n S 2/S i interface, which resulted in a large LPE with a positional sensitivity of up to 116 mV/mm. Furthermore, the measurement circuit with multiple parallel resistors had a strong influence on the ultrafast optical response time of the LPE and the fastest optical relaxation time observed was ∼0.44µs. Our results suggest that the S n S 2/S i junction would be a promising candidate for a wide range of optoelectronic device applications.
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9
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Wang Z, Wang T, Yang Y, Mi X, Wang J. Differential Confocal Optical Probes with Optimized Detection Efficiency and Pearson Correlation Coefficient Strategy Based on the Peak-Clustering Algorithm. MICROMACHINES 2023; 14:1163. [PMID: 37374748 DOI: 10.3390/mi14061163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Revised: 05/25/2023] [Accepted: 05/26/2023] [Indexed: 06/29/2023]
Abstract
Quantifying free-form surfaces using differential confocal microscopy can be challenging, as it requires balancing accuracy and efficiency. When the axial scanning mechanism involves sloshing and the measured surface has a finite slope, traditional linear fitting can introduce significant errors. This study introduces a compensation strategy based on Pearson's correlation coefficient to effectively reduce measurement errors. Additionally, a fast-matching algorithm based on peak clustering was proposed to meet real-time requirements for non-contact probes. To validate the effectiveness of the compensation strategy and matching algorithm, detailed simulations and physical experiments were conducted. The results showed that for a numerical aperture of 0.4 and a depth of slope < 12°, the measurement error was <10 nm, improving the speed of the traditional algorithm system by 83.37%. Furthermore, repeatability and anti-disturbance experiments demonstrated that the proposed compensation strategy is simple, efficient, and robust. Overall, the proposed method has significant potential for application in the realization of high-speed measurements of free-form surfaces.
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Affiliation(s)
- Zhiyi Wang
- Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China
- College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing 100049, China
- Jilin Provincial Key Laboratory of Intelligent Wavefront Sensing and Control, Changchun 130033, China
| | - Tingyu Wang
- Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China
- College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing 100049, China
- Jilin Provincial Key Laboratory of Intelligent Wavefront Sensing and Control, Changchun 130033, China
| | - Yongqiang Yang
- Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China
- College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing 100049, China
- Jilin Provincial Key Laboratory of Intelligent Wavefront Sensing and Control, Changchun 130033, China
| | - Xiaotao Mi
- College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing 100049, China
- Jilin Provincial Key Laboratory of Intelligent Wavefront Sensing and Control, Changchun 130033, China
| | - Jianli Wang
- Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China
- College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing 100049, China
- Jilin Provincial Key Laboratory of Intelligent Wavefront Sensing and Control, Changchun 130033, China
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10
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Pawluczyk J, Żbik M, Piotrowski J. LWIR Lateral Effect Position Sensitive HgCdTe Photodetector at 205 K. SENSORS (BASEL, SWITZERLAND) 2023; 23:4915. [PMID: 37430828 DOI: 10.3390/s23104915] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Revised: 04/12/2023] [Accepted: 04/24/2023] [Indexed: 07/12/2023]
Abstract
We describe in detail the construction and characterization of a Peltier-cooled long-wavelength infrared (LWIR) position-sensitive detector (PSD) based on the lateral effect. The device was recently reported for the first time to the authors' knowledge. It is a modified PIN HgCdTe photodiode, forming the tetra-lateral PSD, with a photosensitive area of 1 × 1 mm2, operating at 205 K in the 3-11 µm spectral range, capable of achieving a position resolution of 0.3-0.6 µm using 10.5 µm 2.6 mW radiation focused on a spot of the 1/e2 diameter 240 µm, with a box-car integration time of 1 µs and correlated double sampling.
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Affiliation(s)
- Jarosław Pawluczyk
- Institute of Applied Physics, Military University of Technology, 00-908 Warsaw, Poland
- VIGO Photonics S.A., 05-850 Ozarow Mazowiecki, Poland
| | - Mateusz Żbik
- VIGO Photonics S.A., 05-850 Ozarow Mazowiecki, Poland
- Institute of Electronic Systems, Warsaw University of Technology, 00-665 Warsaw, Poland
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Hu C, Zhou Z, Zhang X, Guo K, Cui C, Li Y, Gu Z, Zhang W, Shen L, Zhu J. Far-infrared transparent conductors. LIGHT, SCIENCE & APPLICATIONS 2023; 12:98. [PMID: 37085484 PMCID: PMC10121591 DOI: 10.1038/s41377-023-01139-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Revised: 03/22/2023] [Accepted: 03/22/2023] [Indexed: 05/03/2023]
Abstract
The long-standing challenge in designing far-infrared transparent conductors (FIRTC) is the combination of high plasma absorption edge (λp) and high conductivity (σ). These competing requirements are commonly met by tuning carrier concentration or/and effective carrier mass in a metal oxide/oxonate with low optical dielectric constant (εopt = 2-7). However, despite the high σ, the transparent band is limited to mid-infrared (λp < 5 μm). In this paper, we break the trade-off between high σ and λp by increasing the "so-called constant" εopt that has been neglected, and successfully develop the material family of FIRTC with εopt > 15 and λp > 15 μm. These FIRTC crystals are mainly octahedrally-coordinated heavy-metal chalcogenides and their solid solutions with shallow-level defects. Their high εopt relies on the formation of electron-deficiency multicenter bonds resulting in the great electron-polarization effect. The new FIRTC enables us to develop the first "continuous film" type far-infrared electromagnetic shielder that is unattainable using traditional materials. Therefore, this study may inaugurate a new era in far-infrared optoelectronics.
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Affiliation(s)
- Chaoquan Hu
- State Key Laboratory of Superhard Materials, Key Laboratory of Automobile Materials of Ministry of Education, School of Materials Science and Engineering, Jilin Provincial International Cooperation Key Laboratory of High-Efficiency Clean Energy Materials, Jilin University, Changchun, 130012, China.
| | - Zijian Zhou
- State Key Laboratory of Superhard Materials, Key Laboratory of Automobile Materials of Ministry of Education, School of Materials Science and Engineering, Jilin Provincial International Cooperation Key Laboratory of High-Efficiency Clean Energy Materials, Jilin University, Changchun, 130012, China
| | - Xiaoyu Zhang
- State Key Laboratory of Superhard Materials, Key Laboratory of Automobile Materials of Ministry of Education, School of Materials Science and Engineering, Jilin Provincial International Cooperation Key Laboratory of High-Efficiency Clean Energy Materials, Jilin University, Changchun, 130012, China
| | - Kaiyu Guo
- State Key Laboratory of Superhard Materials, Key Laboratory of Automobile Materials of Ministry of Education, School of Materials Science and Engineering, Jilin Provincial International Cooperation Key Laboratory of High-Efficiency Clean Energy Materials, Jilin University, Changchun, 130012, China
| | - Can Cui
- State Key Laboratory of Superhard Materials, Key Laboratory of Automobile Materials of Ministry of Education, School of Materials Science and Engineering, Jilin Provincial International Cooperation Key Laboratory of High-Efficiency Clean Energy Materials, Jilin University, Changchun, 130012, China
| | - Yuankai Li
- State Key Laboratory of Superhard Materials, Key Laboratory of Automobile Materials of Ministry of Education, School of Materials Science and Engineering, Jilin Provincial International Cooperation Key Laboratory of High-Efficiency Clean Energy Materials, Jilin University, Changchun, 130012, China
| | - Zhiqing Gu
- College of Information Science and Engineering, Jiaxing University, Jiaxing, 314001, China
| | - Wei Zhang
- State Key Laboratory of Superhard Materials, Key Laboratory of Automobile Materials of Ministry of Education, School of Materials Science and Engineering, Jilin Provincial International Cooperation Key Laboratory of High-Efficiency Clean Energy Materials, Jilin University, Changchun, 130012, China
- Electron Microscopy Center, Jilin University, Changchun, 130012, China
| | - Liang Shen
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, International Center of Future Science, Jilin University, Changchun, 130012, China.
| | - Jiaqi Zhu
- National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin, 150080, China.
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12
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Cheng S, Liu J, Li Z, Zhang P, Chen J, Yang H. 3D error calibration of spatial spots based on dual position-sensitive detectors. APPLIED OPTICS 2023; 62:933-943. [PMID: 36821147 DOI: 10.1364/ao.479307] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Accepted: 12/28/2022] [Indexed: 06/18/2023]
Abstract
In this paper, a dual position-sensitive detector-based vision measurement system camera is built instead of a traditional CCD camera. The 3D position information for the light point is calculated according to the 2D coordinate information of a certain light point in the space illuminated on the two position-sensitive detector (PSD) photosensitive surfaces, which is used for position detection of the spatial light point. In addition, the positioning model for 2D PSDs with different spot sizes in the Gaussian spot mode is derived by the mathematical model of Lucovsky's differential equation for a PSD. For the nonlinear distortion of the PSD, a nonlinear error calibration method using a particle swarm combined with a back propagation neural network is proposed to correct the errors in the measured values through the relationship between the input and output values, to obtain the predicted value that approximates the real coordinates. Then, by comparing the influence of different spot sizes on the positioning accuracy, we conclude that the smaller the spot formed by the convergence of the beam under the optical lens, the higher the positioning accuracy. We believe this conclusion can help improve the accuracy of PSD measurements. Finally, a red LED light spot is set up, and the 3D position measurement and error calibration of the light spot is done by dual PSD cameras, which better solves the position detection problem of a space light spot under close-range conditions because it is fast, reliable, and easy to implement. It also provides an effective method to detect the motion trajectory of a moving light spot in space.
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13
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Hu J, Wang X, Lin L, Xu J, Liu M, Wang R, Li X, Tao L, Sui Y, Song B. High-Performance Self-Powered Photodetector Based on the Lateral Photovoltaic Effect of All-Inorganic Perovskite CsPbBr 3 Heterojunctions. ACS APPLIED MATERIALS & INTERFACES 2023; 15:1505-1512. [PMID: 36548398 DOI: 10.1021/acsami.2c16347] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
CsPbBr3, an inorganic halide perovskite, has attracted great interest in recent years due to its excellent photoelectric properties. In this paper, we report a high-performance position-sensitive detector and laser communication sensor based on a CsPbBr3/4H-SiC heterojunction that effectively exploits the lateral photovoltaic (LPV) effect. The X-ray diffraction, X-ray photoelectron spectra, and photoluminescence data indicate that a high-quality CsPbBr3 film has been successfully obtained using pulsed laser deposition. The thickness of the CsPbBr3 film is shown to play a key role in the open-circuit voltage and linear LPV. A large position sensitivity (up to 827 mV/mm) of the LPV with a fast relaxation time is observed. Moreover, the shortest relaxation time of only 0.34 μs for 532 nm laser irradiation among counterparts is achieved in the detector under consideration. Furthermore, the position sensitivity and relaxation time of the LPV in the CsPbBr3/4H-SiC heterojunction show a weak dependence on the laser wavelength from 266 to 532 nm. The robust characteristics of fast relaxation time and high position sensitivity of the LPV make the CsPbBr3 junction a promising candidate for both laser communication sensors and self-powered high-performance position-sensitive detectors.
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Affiliation(s)
- Junbei Hu
- School of Physics, Harbin Institute of Technology, Harbin150001, China
| | - Xianjie Wang
- School of Physics, Harbin Institute of Technology, Harbin150001, China
| | - Lei Lin
- School of Physics, Harbin Institute of Technology, Harbin150001, China
| | - Jie Xu
- Key Laboratory of Micro-Systems and Micro-Structures Manufacturing of Ministry of Education, Harbin Institute of Technology, Harbin150001, China
| | - Mengting Liu
- School of Physics, Harbin Institute of Technology, Harbin150001, China
| | - Ran Wang
- School of Physics, Harbin Institute of Technology, Harbin150001, China
| | - Xiaofeng Li
- School of Physics, Harbin Institute of Technology, Harbin150001, China
| | - Lingling Tao
- School of Physics, Harbin Institute of Technology, Harbin150001, China
| | - Yu Sui
- School of Physics, Harbin Institute of Technology, Harbin150001, China
| | - Bo Song
- School of Physics, Harbin Institute of Technology, Harbin150001, China
- National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin150001, China
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14
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Meng X, Sun S, Yan X, Liu F, Cao L, Wang Q, Sun Y. Six-Degree-of-Freedom Posture Measurement Technologies Using Position Sensitive Detectors (PSDs): State of the Art. MICROMACHINES 2022; 13:1903. [PMID: 36363924 PMCID: PMC9695513 DOI: 10.3390/mi13111903] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Revised: 10/31/2022] [Accepted: 11/01/2022] [Indexed: 06/16/2023]
Abstract
Six degree-of-freedom (6-DOF) posture measurement is an important academic research topic which has been broadly applied in many fields. As a high-speed photoelectronic sensor with ultra-high resolution and precision, position sensitive detector (PSD) has shown to be one of the most competitive candidates in 6-DOF measurement. This review presents the research progress of PSD-based 6-DOF posture measurement systems in the field of large-scale equipment assembly, ultra-precision manufacturing and other emerging areas. A total of six methods for implementing 6-DOF measurement are summarized and their advantages and limitations are discussed. Meanwhile, the paper illustrates challenges, potential solutions and future development trends.
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Affiliation(s)
- Xiangxu Meng
- System Packaging and Integration Research Center, Institute of Microelectronics, Chinese Academy of Sciences, Beijing 100029, China
- School of Microelectronics, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Siwei Sun
- System Packaging and Integration Research Center, Institute of Microelectronics, Chinese Academy of Sciences, Beijing 100029, China
| | - Xuetao Yan
- System Packaging and Integration Research Center, Institute of Microelectronics, Chinese Academy of Sciences, Beijing 100029, China
- School of Microelectronics, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Fengman Liu
- System Packaging and Integration Research Center, Institute of Microelectronics, Chinese Academy of Sciences, Beijing 100029, China
| | - Liqiang Cao
- System Packaging and Integration Research Center, Institute of Microelectronics, Chinese Academy of Sciences, Beijing 100029, China
| | - Qidong Wang
- System Packaging and Integration Research Center, Institute of Microelectronics, Chinese Academy of Sciences, Beijing 100029, China
| | - Yu Sun
- System Packaging and Integration Research Center, Institute of Microelectronics, Chinese Academy of Sciences, Beijing 100029, China
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15
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Liu K, Wan D, Wang W, Fei C, Zhou T, Guo D, Bai L, Li Y, Ni Z, Lu J. A Time-Division Position-Sensitive Detector Image System for High-Speed Multitarget Trajectory Tracking. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2206638. [PMID: 36114665 DOI: 10.1002/adma.202206638] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Revised: 09/01/2022] [Indexed: 06/15/2023]
Abstract
High-speed trajectory tracking with real-time processing capability is particularly important in the fields of pilotless automobiles, guidance systems, robotics, and filmmaking. The conventional optical approach to high-speed trajectory tracking involves charge coupled device (CCD) or complementary metal-oxide-semiconductor (CMOS) image sensors, which suffer from trade-offs between resolution and framerates, complexity of the system, and enormous data-analysis processes. Here, a high-speed trajectory tracking system is designed by using a time-division position-sensitive detector (TD-PSD) based on a graphene-silicon Schottky heterojunction. Benefiting from the high-speed optoelectronic response and sub-micrometer positional accuracy of the TD-PSD, multitarget real-time trajectory tracking is realized, with a maximum image output framerate of up to 62 000 frames per second. Moreover, multichannel trajectory tracking and image-distortion correction functionalities are realized by TD-PSD systems through frequency-related image preprocessing, which significantly improves the capacity of real-time information processing and image quality in complicated light environments.
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Affiliation(s)
- Kaiyang Liu
- School of Physics, Frontiers Science Center for Mobile Information Communication and Security, Quantum Information Research Center, Southeast University, Nanjing, 211189, China
| | - Dongyang Wan
- School of Physics, Frontiers Science Center for Mobile Information Communication and Security, Quantum Information Research Center, Southeast University, Nanjing, 211189, China
| | - Wenhui Wang
- School of Physics, Frontiers Science Center for Mobile Information Communication and Security, Quantum Information Research Center, Southeast University, Nanjing, 211189, China
| | - Cheng Fei
- Shandong University, Center for Optics Research and Engineering, Qingdao, Shandong, 266237, P. R. China
| | - Tao Zhou
- School of Physics, Frontiers Science Center for Mobile Information Communication and Security, Quantum Information Research Center, Southeast University, Nanjing, 211189, China
| | - Dingli Guo
- School of Physics, Frontiers Science Center for Mobile Information Communication and Security, Quantum Information Research Center, Southeast University, Nanjing, 211189, China
| | - Lin Bai
- School of Physics, Frontiers Science Center for Mobile Information Communication and Security, Quantum Information Research Center, Southeast University, Nanjing, 211189, China
| | - Yongfu Li
- Shandong University, Center for Optics Research and Engineering, Qingdao, Shandong, 266237, P. R. China
| | - Zhenhua Ni
- School of Physics, Frontiers Science Center for Mobile Information Communication and Security, Quantum Information Research Center, Southeast University, Nanjing, 211189, China
- Purple Mountain Laboratories, Nanjing, 211111, China
| | - Junpeng Lu
- School of Physics, Frontiers Science Center for Mobile Information Communication and Security, Quantum Information Research Center, Southeast University, Nanjing, 211189, China
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16
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Zhang J, Meng K, Ni G. Enhanced Lateral Photovoltaic Effects in n-Si/SiO2/PEDOT:PSS Structures. Polymers (Basel) 2022; 14:polym14071429. [PMID: 35406302 PMCID: PMC9002826 DOI: 10.3390/polym14071429] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Revised: 03/28/2022] [Accepted: 03/29/2022] [Indexed: 12/01/2022] Open
Abstract
Organic/silicon hybrid structures have been extensively studied for the application of solar cells due to their high photoelectric conversion efficiency and simple fabrication process. However, studies of lateral photovoltaic effects (LPEs) in the devices are still scarce. Herein, the Si/SiO2/PEDOT:PSS devices were prepared by spin-coating, and showing the lateral photovoltage (LPV) sensitivity of 14.0 mV/mm at room temperature, which is higher than the control samples of Si/SiO2 (0.1 mV/mm) and Si/PEDOT:PSS (9.0 mV/mm) structures. With the decrease in temperature, the lateral photovoltage increases initially, and reaches a peak at around 210 K, then drops accordingly. The enhancement of LPE can be mainly ascribed to the formation of the p-n junction and the native oxide layer at the organic/inorganic interface.
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Affiliation(s)
- Jingying Zhang
- Department of Optical Science and Engineering, Fudan University, Shanghai 200433, China; (J.Z.); (K.M.)
| | - Kang Meng
- Department of Optical Science and Engineering, Fudan University, Shanghai 200433, China; (J.Z.); (K.M.)
| | - Gang Ni
- Department of Optical Science and Engineering, Fudan University, Shanghai 200433, China; (J.Z.); (K.M.)
- Shanghai Engineering Research Center for Ultra-Precision Optical Manufacturing, Fudan University, Shanghai 200433, China
- Correspondence:
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17
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Heterogeneous self-healing assembly of MXene and graphene oxide enables producing free-standing and self-reparable soft electronics and robots. Sci Bull (Beijing) 2022; 67:501-511. [DOI: 10.1016/j.scib.2021.11.015] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Revised: 10/08/2021] [Accepted: 11/10/2021] [Indexed: 11/21/2022]
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18
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Li T, Shi J, Liu Z, Xie W, Cui K, Hu B, Che G, Wang L, Zhou T, Liu C. Constructing porous intramolecular donor–acceptor integrated carbon nitride doped with m-aminophenol for boosting photocatalytic degradation and hydrogen evolution activity. Catal Sci Technol 2022. [DOI: 10.1039/d2cy00897a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A porous intramolecular D–A integrated carbon nitride with boosted photocatalytic activity was constructed via thermal melting followed by thermal copolymerization of m-aminophenol with urea.
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Affiliation(s)
- Tiantian Li
- Key Laboratory of Preparation and Application of Environmental Friendly Materials, Ministry of Education, Jilin Normal University, Changchun 130103, P.R. China
- College of Chemistry, Jilin Normal University, Siping 136000, P.R. China
| | - Jingmin Shi
- Key Laboratory of Preparation and Application of Environmental Friendly Materials, Ministry of Education, Jilin Normal University, Changchun 130103, P.R. China
- College of Chemistry, Jilin Normal University, Siping 136000, P.R. China
| | - Zhixue Liu
- Key Laboratory of Preparation and Application of Environmental Friendly Materials, Ministry of Education, Jilin Normal University, Changchun 130103, P.R. China
- College of Chemistry, Jilin Normal University, Siping 136000, P.R. China
| | - Wei Xie
- Key Laboratory of Preparation and Application of Environmental Friendly Materials, Ministry of Education, Jilin Normal University, Changchun 130103, P.R. China
- College of Chemistry, Jilin Normal University, Siping 136000, P.R. China
| | - Keyu Cui
- Key Laboratory of Preparation and Application of Environmental Friendly Materials, Ministry of Education, Jilin Normal University, Changchun 130103, P.R. China
- College of Chemistry, Jilin Normal University, Siping 136000, P.R. China
| | - Bo Hu
- Key Laboratory of Preparation and Application of Environmental Friendly Materials, Ministry of Education, Jilin Normal University, Changchun 130103, P.R. China
- College of Chemistry, Jilin Normal University, Siping 136000, P.R. China
| | - Guangbo Che
- Key Laboratory of Preparation and Application of Environmental Friendly Materials, Ministry of Education, Jilin Normal University, Changchun 130103, P.R. China
- College of Environmental Science and Engineering, Jilin Normal University, Siping 136000, P.R. China
- School of Chemistry, Baicheng Normal University, Baicheng 137099, P.R. China
| | - Liang Wang
- Key Laboratory of Preparation and Application of Environmental Friendly Materials, Ministry of Education, Jilin Normal University, Changchun 130103, P.R. China
- College of Chemistry, Jilin Normal University, Siping 136000, P.R. China
| | - Tianyu Zhou
- Key Laboratory of Preparation and Application of Environmental Friendly Materials, Ministry of Education, Jilin Normal University, Changchun 130103, P.R. China
- College of Environmental Science and Engineering, Jilin Normal University, Siping 136000, P.R. China
- Key Laboratory of Environmental Materials and Pollution Control, The Education Department of Jilin Province, Jilin Normal University, Siping 136000, P.R. China
| | - Chunbo Liu
- Key Laboratory of Preparation and Application of Environmental Friendly Materials, Ministry of Education, Jilin Normal University, Changchun 130103, P.R. China
- College of Environmental Science and Engineering, Jilin Normal University, Siping 136000, P.R. China
- Key Laboratory of Environmental Materials and Pollution Control, The Education Department of Jilin Province, Jilin Normal University, Siping 136000, P.R. China
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19
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Yan L, Hou J, Li T, Wang Y, Liu C, Zhou T, Jiang W, Wang D, Che G. Tremella-like integrated carbon nitride with polyvinylimine-doped for enhancing photocatalytic degradation and hydrogen evolution performances. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.119766] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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20
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Ganesh N, Schutt K, Nayak PK, Snaith HJ, Narayan KS. 2D Position-Sensitive Hybrid-Perovskite Detectors. ACS APPLIED MATERIALS & INTERFACES 2021; 13:54527-54535. [PMID: 34734692 DOI: 10.1021/acsami.1c15121] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Hybrid organic-inorganic perovskites (HOIPs) have emerged as a versatile class of semiconductors for numerous optoelectronic applications. Here, we demonstrate light-excitation-dependent two-dimensional (2D) position-sensitive detectors (PSDs) using a mixed-phase perovskite, FA0.83Cs0.17Pb(I0.9Br0.1)3, as the active semiconductor, incorporated within a five-terminal device geometry. The light-induced lateral photovoltage, which is initiated by selective charge transfer across the metal-perovskite barrier interface, is utilized to achieve the excitation-position-dependent electric response. The 2D PSD devices exhibit a spatially dependent linear variation of the photosignal with sensitivity >50 μV mm-1 and a low position detection error (1-2%), making them suitable for applications such as quadrant detectors. Further, it is observed that the device architecture plays a key role in controlling the dynamics and linearity of the HOIP PSDs. The large active area devices (up to ∼2 cm × 2 cm) exhibit a distinct spatial variation of the photosignal. We utilize the functionality of the PSD device for light-tracking applications by implementing a continuous detection scheme.
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Affiliation(s)
- N Ganesh
- Chemistry and Physics of Material Unit (CPMU), Jawaharlal Nehru Center for Advanced Scientific Research, Jakkur, Bengaluru 560064, India
| | - Kelly Schutt
- Clarendon Laboratory, Department of Physics, University of Oxford, Oxford OX1 3PU, U.K
| | - Pabitra K Nayak
- Clarendon Laboratory, Department of Physics, University of Oxford, Oxford OX1 3PU, U.K
- TIFR Centre for Interdisciplinary Sciences, Tata Institute of Fundamental Research, Hyderabad 500046, India
| | - Henry J Snaith
- Clarendon Laboratory, Department of Physics, University of Oxford, Oxford OX1 3PU, U.K
| | - K S Narayan
- Chemistry and Physics of Material Unit (CPMU), Jawaharlal Nehru Center for Advanced Scientific Research, Jakkur, Bengaluru 560064, India
- School of Advanced Materials (SAMat), Jawaharlal Nehru Center for Advanced Scientific Research, Jakkur, Bengaluru 560064, India
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21
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Ma J, Chen M, Qiao S, Fu G, Wang S. High-performance broadband position-sensitive detector based on lateral photovoltaic effect of PbSe heterostructure. OPTICS EXPRESS 2021; 29:35226-35237. [PMID: 34808961 DOI: 10.1364/oe.439796] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Accepted: 09/29/2021] [Indexed: 06/13/2023]
Abstract
PbSe has attracted considerable attention due to its promising applications in optoelectronics and energy harvesting. In this work, we explore the lateral photovoltaic effect (LPE) of PbSe films with a simple PbSe/Si heterostructure under nonuniform light illumination and zero-bias conditions. The LPE response is strongly dependent on the thickness of the PbSe film, but always shows a linear dependence on the laser spot position in an ultra-large working size of 5 mm and exhibits a wide photoresponse ranging from visible to near-infrared. The maximum position sensitivity can reach up to 190 mV/mm for the 15-nm-thick PbSe device at 1064 nm and nonlinearity is less than 4%, demonstrating its new potential application in novel position sensitive detectors (PSDs). Besides, the device also shows an ultrafast response speed, with the rise and fall time of ∼40 µs and ∼105 µs, respectively, and excellent reproducibility. These results bring great inspirations for developing high-performance broadband and self-powered PSDs based on the PbSe/Si heterostructure.
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22
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Zheng SW, Wang L, Wang HY, Xu CY, Luo Y, Sun HB. Observation of quantum-confined exciton states in monolayer WS 2 quantum dots by ultrafast spectroscopy. NANOSCALE 2021; 13:17093-17100. [PMID: 34623366 DOI: 10.1039/d1nr04868f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Monolayer transition metal dichalcogenide quantum dots (TMDC QDs) could exhibit unique photophysical properties, because of both lateral quantum confinement effect and edge effect. However, there is little fundamental study on the quantum-confined exciton dynamics in monolayer TMDC QDs, to date. Here, by selective excitations of monolayer WS2 QDs in broadband transient absorption (TA) spectroscopy experiments, the excitation-wavelength-dependent ground state bleaching signals corresponding to the quantum-confined exciton states are directly observed. Compared to the time-resolved photophysical properties of WS2 nanosheets, the selected monolayer WS2 QDs only show one ground state bleaching peak with larger initial values for the linear polarization anisotropy of band-edge excitons, probably due to the expired spin-orbit coupling. This suggests a complete change of the band structure for monolayer WS2 QDs. In the femtosecond time-resolved circular polarization anisotropy experiments, a valley depolarization time of ∼100 fs is observed for WS2 nanosheets at room temperature, which is not observed for monolayer WS2 QDs. Our findings suggest a strong state-mixing of band-edge valley excitons responsible for the large linear polarization in monolayer WS2 QDs, which could be helpful for understanding the exciton relaxation mechanisms in colloidal monolayer TMDC QDs.
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Affiliation(s)
- Shu-Wen Zheng
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, China.
| | - Lei Wang
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, China.
| | - Hai-Yu Wang
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, China.
| | - Chen-Yu Xu
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, China.
| | - Yang Luo
- Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China
| | - Hong-Bo Sun
- State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instrument, Tsinghua University, Haidian, Beijing 100084, China
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23
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Zou Q, Shen Y, Ou-Yang J, Zhang Y, Jin C. Polarization-insensitive graphene photodetectors enhanced by a broadband metamaterial absorber. OPTICS EXPRESS 2021; 29:24255-24263. [PMID: 34614674 DOI: 10.1364/oe.433347] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Accepted: 07/09/2021] [Indexed: 06/13/2023]
Abstract
Graphene, combined with plasmonic nanostructures, shows great promise for achieving desirable photodetection properties and functionalities. Here, we theoretically proposed and experimentally demonstrated a graphene photodetector based on the metamaterial absorber in the visible and near-infrared wavebands. The experimental results show that the metamaterial-based graphene photodetector (MGPD) has achieved up to 3751% of photocurrent enhancement relative to an antennasless graphene device at zero external bias. Furthermore, the polarization-independent of photoresponse has resulted from the polarization-insensitive absorption of symmetric square-ring antennas. Moreover, the spectral-dependent photocurrent enhancement, originated from the enhanced light-trapping effect, was experimentally confirmed and understood by the simulated electric field profiles. The design contributes to the development of high-performance graphene photodetectors and optoelectronic devices.
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24
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Wu J, Ma H, Yin P, Ge Y, Zhang Y, Li L, Zhang H, Lin H. Two‐Dimensional Materials for Integrated Photonics: Recent Advances and Future Challenges. SMALL SCIENCE 2021. [DOI: 10.1002/smsc.202000053] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Affiliation(s)
- Jianghong Wu
- Key Lab. of Advanced Micro/Nano Electronic Devices & Smart Systems of Zhejiang College of Information Science & Electronic Engineering Zhejiang University Hangzhou 310027 China
- Key Laboratory of 3D Micro/Nano Fabrication and Characterization of Zhejiang Province School of Engineering Westlake University Hangzhou 310024 China
- Institute of Advanced Technology Westlake Institute for Advanced Study 18 Shilongshan Road Hangzhou 310024 China
| | - Hui Ma
- Key Lab. of Advanced Micro/Nano Electronic Devices & Smart Systems of Zhejiang College of Information Science & Electronic Engineering Zhejiang University Hangzhou 310027 China
| | - Peng Yin
- Institute of Microscale Optoelectronics Collaborative Innovation Centre for Optoelectronic Science & Technology International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Physics and Optoelectronic Engineering Shenzhen Key Laboratory of Micro-Nano Photonic Information Technology Guangdong Laboratory of Artificial
| | - Yanqi Ge
- Institute of Microscale Optoelectronics Collaborative Innovation Centre for Optoelectronic Science & Technology International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Physics and Optoelectronic Engineering Shenzhen Key Laboratory of Micro-Nano Photonic Information Technology Guangdong Laboratory of Artificial
| | - Yupeng Zhang
- Institute of Microscale Optoelectronics Collaborative Innovation Centre for Optoelectronic Science & Technology International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Physics and Optoelectronic Engineering Shenzhen Key Laboratory of Micro-Nano Photonic Information Technology Guangdong Laboratory of Artificial
| | - Lan Li
- Key Laboratory of 3D Micro/Nano Fabrication and Characterization of Zhejiang Province School of Engineering Westlake University Hangzhou 310024 China
- Institute of Advanced Technology Westlake Institute for Advanced Study 18 Shilongshan Road Hangzhou 310024 China
| | - Han Zhang
- Institute of Microscale Optoelectronics Collaborative Innovation Centre for Optoelectronic Science & Technology International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Physics and Optoelectronic Engineering Shenzhen Key Laboratory of Micro-Nano Photonic Information Technology Guangdong Laboratory of Artificial
| | - Hongtao Lin
- Key Lab. of Advanced Micro/Nano Electronic Devices & Smart Systems of Zhejiang College of Information Science & Electronic Engineering Zhejiang University Hangzhou 310027 China
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25
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Gao M, Sun L, Ma C, Li X, Jiang H, Shen D, Wang H, Huo P. Constructed Z-Scheme g-C 3N 4/Ag 3VO 4/rGO Photocatalysts with Multi-interfacial Electron-Transfer Paths for High Photoreduction of CO 2. Inorg Chem 2021; 60:1755-1766. [PMID: 33464879 DOI: 10.1021/acs.inorgchem.0c03233] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Z-scheme g-C3N4/Ag3VO4/reduced graphene oxide (rGO) photocatalysts with multi-interfacial electron-transfer paths enhancing CO2 photoreduction under UV-vis light irradiation were successfully prepared by a hydrothermal process. Transmission electron microscope images displayed that the prepared photocatalysts have a unique 2D-0D-2D ternary sandwich structure. Photoelectrochemical characterizations including TPR, electrochemical impedance spectroscopy, photoluminescence, and linear sweep voltammetry explained that the multi-interfacial structure effectively improved the separation and transmission capabilities of photogenerated carriers. Electron spin resonance spectroscopy and band position analysis proved that the electron-transfer mode of g-C3N4/Ag3VO4 meets the Z-scheme mechanism. The introduction of rGO provided more electron-transfer paths for the photocatalysts and enhanced the stability of Ag-based semiconductors. In addition, the π-π conjugation effect between g-C3N4 and rGO further improved the generation and separation efficiency of photogenerated electron-hole pairs. Then, the multiple channels (Ag3VO4 → CN, Ag3VO4 → rGO → CN, and rGO → CN) due to the 2D-0D-2D structure greatly improving the photocatalytic CO2 reduction ability have been discussed in detail.
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Affiliation(s)
- Ming Gao
- Institute of Green Chemistry and Chemical Technology, School of Chemistry & Chemical Engineering, Jiangsu University, Zhenjiang 212013, PR China
| | - Linlin Sun
- Institute of Green Chemistry and Chemical Technology, School of Chemistry & Chemical Engineering, Jiangsu University, Zhenjiang 212013, PR China.,School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, PR China
| | - Changchang Ma
- Institute of Green Chemistry and Chemical Technology, School of Chemistry & Chemical Engineering, Jiangsu University, Zhenjiang 212013, PR China
| | - Xin Li
- Institute of Green Chemistry and Chemical Technology, School of Chemistry & Chemical Engineering, Jiangsu University, Zhenjiang 212013, PR China
| | - Haopeng Jiang
- Institute of Green Chemistry and Chemical Technology, School of Chemistry & Chemical Engineering, Jiangsu University, Zhenjiang 212013, PR China
| | - Dong Shen
- Institute of Green Chemistry and Chemical Technology, School of Chemistry & Chemical Engineering, Jiangsu University, Zhenjiang 212013, PR China
| | - Huiqin Wang
- School of Energy and Power Engineering, Jiangsu University, Zhenjiang 212013, PR China
| | - Pengwei Huo
- Institute of Green Chemistry and Chemical Technology, School of Chemistry & Chemical Engineering, Jiangsu University, Zhenjiang 212013, PR China
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26
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Wang Y, Liu T, Tian W, Zhang Y, Shan P, Chen Y, Wei W, Yuan H, Cui H. Mechanism for hydrogen evolution from water splitting based on a MoS2/WSe2 heterojunction photocatalyst: a first-principle study. RSC Adv 2020; 10:41127-41136. [PMID: 35519202 PMCID: PMC9057806 DOI: 10.1039/d0ra06939f] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Accepted: 11/05/2020] [Indexed: 12/26/2022] Open
Abstract
In this study, density functional theory and hybrid functional theory are used to calculate the work function and energy band structure of MoS2 and WSe2, as well as the binding energy, work function, energy band structure, density of states, charge density difference, energy band alignment, Bader charge, and H adsorption free energy of MoS2/WSe2. The difference in work function led to the formation of a built-in electric field from WSe2 to MoS2, and the energy band alignment indicated that the redox reactions were located on the MoS2 and WSe2 semiconductors, respectively. The binding energy of MoS2 and WSe2 indicated that the thermodynamic properties of the heterogeneous structure were stable. MoS2 and WSe2 gathered electrons and holes, respectively, and redistributed them under the action of the built-in electric field. The photogenerated electrons and holes were enriched on the surface of WSe2 and MoS2, which greatly improved the efficiency of hydrogen production by photocatalytic water splitting. The mechanism of heterojunction photocatalytic splitting of water for hydrogen evolution.![]()
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Affiliation(s)
- Yazhou Wang
- School of Mechanical Engineering
- Shaanxi University of Technology
- Hanzhong
- China
- Shaanxi Key Laboratory of Industrial Automation
| | - Tong Liu
- School of Mechanical Engineering
- Shaanxi University of Technology
- Hanzhong
- China
- Shaanxi Key Laboratory of Industrial Automation
| | - Weizhi Tian
- School of Mechanical Engineering
- Shaanxi University of Technology
- Hanzhong
- China
- Shaanxi Key Laboratory of Industrial Automation
| | - Ying Zhang
- School of Mechanical Engineering
- Shaanxi University of Technology
- Hanzhong
- China
- Shaanxi Key Laboratory of Industrial Automation
| | - Pengyue Shan
- School of Mechanical Engineering
- Shaanxi University of Technology
- Hanzhong
- China
- Shaanxi Key Laboratory of Industrial Automation
| | - Yunjian Chen
- School of Mechanical Engineering
- Shaanxi University of Technology
- Hanzhong
- China
- Shaanxi Key Laboratory of Industrial Automation
| | - Wanhang Wei
- School of Mechanical Engineering
- Shaanxi University of Technology
- Hanzhong
- China
- Shaanxi Key Laboratory of Industrial Automation
| | - Hongkuan Yuan
- School of Physical Science and Technology
- Southwest University
- Chongqing
- P. R. China
| | - Hong Cui
- School of Mechanical Engineering
- Shaanxi University of Technology
- Hanzhong
- China
- Shaanxi Key Laboratory of Industrial Automation
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27
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Wang Y, Tang X, Liu Z, Liu Z, Yan Y, Yang B, Zhu Z. Fabrication of a Z-scheme MoS 2/CuO heterojunction for enhanced 2-mercaptobenzothiazole degradation activity and mechanism insight. NEW J CHEM 2020. [DOI: 10.1039/d0nj03521a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
A Z-scheme MoS2/CuO photocatalyst is successfully developed using a hydrothermal and calcination method, which has excellent activity (96%) in the degradation of 2-mercaptobenzothiazole (MBT) under visible light irradiation.
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Affiliation(s)
- Yunqi Wang
- College of science
- Beihua University
- Jilin
- P. R. China
- Institute of the Green Chemistry and Chemical Technology
| | - Xu Tang
- Institute for Advanced Materials
- School of Materials Science and Engineering
- Jiangsu University
- Zhenjiang
- P. R. China
| | - Zhixiang Liu
- School of Mechanical and Transportation Engineering
- Guangxi University of Science and Technology
- Liuzhou
- P. R. China
| | - Zhi Liu
- Department of Chemistry
- College of Science
- Shantou University
- Shantou
- P. R. China
| | - Yongsheng Yan
- Institute of the Green Chemistry and Chemical Technology
- School of Chemistry and Chemical Engineering
- Jiangsu University
- Zhenjiang
- P. R. China
| | - Boting Yang
- College of science
- Beihua University
- Jilin
- P. R. China
| | - Zhi Zhu
- Institute of the Green Chemistry and Chemical Technology
- School of Chemistry and Chemical Engineering
- Jiangsu University
- Zhenjiang
- P. R. China
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