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Wang L, Wang H, Liu J, Wang Y, Shao H, Li W, Yi M, Ling H, Xie L, Huang W. Negative Photoconductivity Transistors for Visuomorphic Computing. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024:e2403538. [PMID: 39040000 DOI: 10.1002/adma.202403538] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2024] [Revised: 06/26/2024] [Indexed: 07/24/2024]
Abstract
Visuomorphic computing aims to simulate and potentially surpass the human retina by mimicking biological visual perception with an artificial retina. Despite significant progress, challenges persist in perceiving complex interactive environments. Negative photoconductivity transistors (NPTs) mimic synaptic behavior by achieving adjustable positive photoconductivity (PPC) and negative photoconductivity (NPC), simulating "excitation" and "inhibition" akin to sensory cell signals. In complex interactive environments, NPTs are desired for visuomorphic computing that can achieve a better sense of information, lower power consumption, and reduce hardware complexity. In this review, it is started by introducing the development process of NPTs, while placing a strong emphasis on the device structures, working mechanisms, and key performance parameters. The common material systems employed in NPTs based on their functions are then summarized. Moreover, it is proceeded to summarize the noteworthy applications of NPTs in optoelectronic devices, including advanced multibit nonvolatile memory, optoelectronic logic gates, optical encryption, and visual perception. Finally, the challenges and prospects that lie ahead in the ongoing development of NPTs are addressed, offering valuable insights into their applications in optoelectronics and a comprehensive understanding of their significance.
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Affiliation(s)
- Le Wang
- State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications (NUPT), Nanjing, 210023, China
| | - Haotian Wang
- State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications (NUPT), Nanjing, 210023, China
| | - Jing Liu
- State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications (NUPT), Nanjing, 210023, China
| | - Yiru Wang
- State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications (NUPT), Nanjing, 210023, China
| | - He Shao
- State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications (NUPT), Nanjing, 210023, China
| | - Wen Li
- State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications (NUPT), Nanjing, 210023, China
| | - Mingdong Yi
- State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications (NUPT), Nanjing, 210023, China
| | - Haifeng Ling
- State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications (NUPT), Nanjing, 210023, China
| | - Linghai Xie
- State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications (NUPT), Nanjing, 210023, China
| | - Wei Huang
- State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications (NUPT), Nanjing, 210023, China
- Frontiers Science Center for Flexible Electronics (FSCFE), MIIT Key Laboratory of Flexible Electronics (KloFE), Northwestern Polytechnical University (NPU), Xi'an, 710072, China
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Gou R, Zhou S, Shi C, Sun Q, Huang Z, Zhao J, Xiao Y, Lei S, Cheng B. Control of positive and negative photo- and thermal-responses in a single PbI 2@CH 3NH 3PbI 3 micro/nanowire-based device for real-time sensing, nonvolatile memory, and logic operation. MATERIALS HORIZONS 2024; 11:2258-2270. [PMID: 38439663 DOI: 10.1039/d4mh00070f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/06/2024]
Abstract
CH3NH3PbI3 has shown great potential for photodetectors and photovoltaic devices due to its excellent positive response to visible light. However, its real-time response characteristics hinder its application in optical memory and logic operation; moreover, the presence of excessive PbI2 is a double-edged sword. Herein, we constructed a dual-terminal device using a single CH3NH3PbI3 micro/nanowire with two Ag electrodes, and then in situ introduced PbI2 quantum dots (QDs) as hole trap centres by thermal decomposition at 160 °C. An anomalous negative photoconductivity (NPC) effect for sub-bandgap light below the PbI2 bandgap is obtained. Importantly, an electrically erasable nonvolatile photomemory can be realized. Furthermore, the device also exhibits an abnormal positive thermal resistance (PTR)-related thermomemory effect, and the thermal-induced high-resistance state (HRS) can be erased by a large bias or an illumination of 365 nm super-bandgap UV light. Additionally, logical "OR" gate operations are achieved through a combination of 650 nm sub-bandgap light and a 70 °C temperature-induced HRS, as well as a large bias and 365 nm super-bandgap light-triggered low-resistance state. These effects are attributed to the excitation and injection of holes in QDs and structural defect traps. This multifunctional device, integrating real-time sensing, nonvolatile memory, and logical operation, holds significant potential for novel electronic and optoelectronic applications.
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Affiliation(s)
- Runna Gou
- School of Physics and Materials Science, Nanchang University, Jiangxi 330031, P. R. China.
- School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, P. R. China
| | - Shuanfu Zhou
- School of Physics and Materials Science, Nanchang University, Jiangxi 330031, P. R. China.
| | - Cencen Shi
- Institute for Advanced Study, Nanchang University, Jiangxi 330031, P. R. China
| | - Qinghua Sun
- School of Physics and Materials Science, Nanchang University, Jiangxi 330031, P. R. China.
| | - Zhikang Huang
- Institute for Advanced Study, Nanchang University, Jiangxi 330031, P. R. China
| | - Jie Zhao
- School of Physics and Materials Science, Nanchang University, Jiangxi 330031, P. R. China.
| | - Yanhe Xiao
- School of Physics and Materials Science, Nanchang University, Jiangxi 330031, P. R. China.
| | - Shuijin Lei
- School of Physics and Materials Science, Nanchang University, Jiangxi 330031, P. R. China.
| | - Baochang Cheng
- School of Physics and Materials Science, Nanchang University, Jiangxi 330031, P. R. China.
- Institute for Advanced Study, Nanchang University, Jiangxi 330031, P. R. China
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Yang W, Zhang J, Xiong H, Lan J, Yuan S, Zhan M, Tan Z, Li W, Fan J. Emerging lead-free all inorganic perovskite single crystals K 7Bi 3X 16 (X = Cl, Br) toward photodetector application. Dalton Trans 2024; 53:6609-6617. [PMID: 38516917 DOI: 10.1039/d3dt03872f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/23/2024]
Abstract
Lead-free inorganic perovskites have attracted intensive attention in the field of photodetectors owing to their high stability, non-toxicity, and remarkable photoelectric characteristics. Herein, we designed and developed a series of thus-far unreported lead-free all inorganic perovskite single crystals, K7Bi3X16 (X = Cl, Br). In particular, we resorted to cooling crystallization and intercalated K+ to inorganic Bi-Br and Bi-Cl frameworks as inorganic A-site cations, obtaining zero-dimensional (0D) K7Bi3X16 (X = Cl, Br) perovskite single crystals, which display suitable bandgaps, excellent electron mobility and low trap-state density, as analysed by experimental characterization and density functional theory (DFT) calculations. Accordingly, the vertical structure K7Bi3Br16 photodetector can achieve a fast ON/OFF switch under the irradiation of 395 nm light. When the light intensity is 5 mW cm-2 and the voltage is 3 V, the responsivity is calculated to be 0.052 mA W-1. The above characteristics make K7Bi3Br16 a promising material for fabricating ultraviolet photodetectors.
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Affiliation(s)
- Wenjian Yang
- Department of Electronic Engineering, College of Information Science and Technology, Jinan University, Guangzhou, 510632, China
| | - Jingshen Zhang
- Department of Electronic Engineering, College of Information Science and Technology, Jinan University, Guangzhou, 510632, China
| | - Hui Xiong
- Department of Electronic Engineering, College of Information Science and Technology, Jinan University, Guangzhou, 510632, China
| | - Jing Lan
- Department of Electronic Engineering, College of Information Science and Technology, Jinan University, Guangzhou, 510632, China
| | - Songyang Yuan
- Department of Electronic Engineering, College of Information Science and Technology, Jinan University, Guangzhou, 510632, China
| | - Mengdi Zhan
- Department of Electronic Engineering, College of Information Science and Technology, Jinan University, Guangzhou, 510632, China
| | - Ziyu Tan
- Department of Electronic Engineering, College of Information Science and Technology, Jinan University, Guangzhou, 510632, China
| | - Wenzhe Li
- Institute of New Energy Technology, College of Physics & Optoelectronic Engineering, Jinan University, Guangzhou, 510632, China
- Key Laboratory of New Semiconductors and Devices of Guangdong Higher Education Institutes, Jinan University, Guangzhou, 510631, China
- Guangdong Provincial Key Laboratory of Nanophotonic Manipulation, Jinan University, Guangzhou, 511443, China.
| | - Jiandong Fan
- Institute of New Energy Technology, College of Physics & Optoelectronic Engineering, Jinan University, Guangzhou, 510632, China
- Key Laboratory of New Semiconductors and Devices of Guangdong Higher Education Institutes, Jinan University, Guangzhou, 510631, China
- Guangdong Provincial Key Laboratory of Nanophotonic Manipulation, Jinan University, Guangzhou, 511443, China.
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Li X, Zhang G, Hua Y, Cui F, Sun X, Liu J, Liu H, Bi Y, Yue Z, Zhai Z, Xia H, Tao X. Dimensional and Optoelectronic Tuning of Lead-free Perovskite Cs 3 Bi 2 I 9-n Br n Single Crystals for Enhanced Hard X-ray Detection. Angew Chem Int Ed Engl 2023; 62:e202315817. [PMID: 37885150 DOI: 10.1002/anie.202315817] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Revised: 10/25/2023] [Accepted: 10/26/2023] [Indexed: 10/28/2023]
Abstract
Inorganic Bi-based perovskites have shown great potential in X-ray detection for their large absorption to X-rays, diverse low-dimensional structures, and eco-friendliness without toxic metals. However, they suffer from poor carrier transport properties compared to Pb-based perovskites. Here, we propose a mixed-halogen strategy to tune the structural dimensions and optoelectronic properties of Cs3 Bi2 I9-n Brn (0≤n≤9). Ten centimeter-sized single crystals are successfully grown by the Bridgman technique. Upon doping bromine to zero-dimensional Cs3 Bi2 I9 , the crystal transforms into a two-dimensional structure as the bromine content reaches Cs3 Bi2 I8 Br. Correspondingly, the optoelectronic properties are adjusted. Among these crystals, Cs3 Bi2 I8 Br exhibits negligible ion migration, moderate resistivity, and the best carrier transport capability. The sensitivities in 100 keV hard X-ray detection are 1.33×104 and 1.74×104 μC Gyair -1 cm-2 at room temperature and 75 °C, respectively, which are the highest among all reported bismuth perovskites. Moreover, the lowest detection limit of 28.6 nGyair s-1 and ultralow dark current drift of 9.12×10-9 nA cm-1 s-1 V-1 are obtained owing to the high ionic activation energy. Our work demonstrates that Br incorporation is an effective strategy to enhance the X-ray detection performance by tuning the dimensional and optoelectronic properties.
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Affiliation(s)
- Xiang Li
- State Key Laboratory of Crystal Materials, Institute of Crystal Materials, Shandong University, Jinan, 250100, P. R. China
| | - Guodong Zhang
- State Key Laboratory of Crystal Materials, Institute of Crystal Materials, Shandong University, Jinan, 250100, P. R. China
| | - Yunqiu Hua
- State Key Laboratory of Crystal Materials, Institute of Crystal Materials, Shandong University, Jinan, 250100, P. R. China
| | - Fucai Cui
- State Key Laboratory of Crystal Materials, Institute of Crystal Materials, Shandong University, Jinan, 250100, P. R. China
| | - Xue Sun
- State Key Laboratory of Crystal Materials, Institute of Crystal Materials, Shandong University, Jinan, 250100, P. R. China
| | - Jiaxin Liu
- State Key Laboratory of Crystal Materials, Institute of Crystal Materials, Shandong University, Jinan, 250100, P. R. China
| | - Hongjie Liu
- State Key Laboratory of Crystal Materials, Institute of Crystal Materials, Shandong University, Jinan, 250100, P. R. China
| | - Yanxiao Bi
- State Key Laboratory of Crystal Materials, Institute of Crystal Materials, Shandong University, Jinan, 250100, P. R. China
| | - Zhongjie Yue
- State Key Laboratory of Crystal Materials, Institute of Crystal Materials, Shandong University, Jinan, 250100, P. R. China
| | - Zhongjun Zhai
- State Key Laboratory of Crystal Materials, Institute of Crystal Materials, Shandong University, Jinan, 250100, P. R. China
| | - Haibing Xia
- State Key Laboratory of Crystal Materials, Institute of Crystal Materials, Shandong University, Jinan, 250100, P. R. China
| | - Xutang Tao
- State Key Laboratory of Crystal Materials, Institute of Crystal Materials, Shandong University, Jinan, 250100, P. R. China
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Kar MR, Sahoo K, Mohapatra A, Bhaumik S. Stable and luminescent cesium copper halide nanocrystals embedded in flexible polymer fibers for fabrication of down-converting WLEDs. NANOSCALE ADVANCES 2023; 5:6238-6248. [PMID: 37941958 PMCID: PMC10629056 DOI: 10.1039/d3na00440f] [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: 06/21/2023] [Accepted: 10/06/2023] [Indexed: 11/10/2023]
Abstract
Recently, CsPbX3 (X = I, Br, Cl) perovskite nanocrystals (NCs) have drawn wide attention owing to their outstanding photophysical and optoelectronic properties. However, the toxicity of such NCs remained a big challenge for further commercialization. Herein, we adopt facile methods for synthesizing green-emissive Cs3Cu2Cl5 and blue-emissive Cs3Cu2Br2.5I2.5 perovskite NCs that exhibit broad emission spectra with large Stokes shifts. These NCs showed photoluminescence quantum yields (PLQY) up to 65% (Cs3Cu2Cl5 NCs) and 32% (Cs3Cu2Br2.5I2.5 NCs) with limited stabilities. To further improve the stability, the NCs were blended with a hydrophobic polymer poly-methylmethacrylate (PMMA) and embedded inside the polymer fiber by an electrospinning process to form composite fibers. The as-prepared Cs3Cu2Cl5@PMMA and Cs3Cu2Br2.5I2.5@PMMA fiber films demonstrated good surface coverage and better thermal stability, and even retained their emission properties when dispersed in water. The emissive fibers were also deposited on flexible polyethylene terephthalate (PET) substrates that displayed high resistance towards bending and twisting with no signs of breakage, damage, or loss of optical properties. Finally, UV-pumped phosphor-converted WLEDs fabricated by using these blue and green-emitting fibers revealed CIE chromaticity coordinates at (0.27, 0.33) with a maximum luminous efficiency of 69 Lm W-1 and correlated color temperature (CCT) value of 8703 K. These outcomes can be beneficial for the development of futuristic flexible display technologies.
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Affiliation(s)
- Manav Raj Kar
- Department of Engineering and Materials Physics, Institute of Chemical Technology-IndianOil Odisha Campus Bhubaneswar 751013 India
| | - Kajol Sahoo
- Department of Engineering and Materials Physics, Institute of Chemical Technology-IndianOil Odisha Campus Bhubaneswar 751013 India
| | - Ashutosh Mohapatra
- Department of Engineering and Materials Physics, Institute of Chemical Technology-IndianOil Odisha Campus Bhubaneswar 751013 India
| | - Saikat Bhaumik
- Department of Engineering and Materials Physics, Institute of Chemical Technology-IndianOil Odisha Campus Bhubaneswar 751013 India
- Department of Physics, Indian Institute of Technology Guwahati Assam 781039 India
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6
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Cao A, Li S, Chen H, Deng M, Xu X, Shang L, Li Y, Cui A, Hu Z. A polar-switchable and controllable negative phototransistor for information encryption. MATERIALS HORIZONS 2023; 10:5099-5109. [PMID: 37691576 DOI: 10.1039/d3mh01120h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/12/2023]
Abstract
Anomalous negative phototransistors have emerged as a distinct research area, characterized by a decrease in channel current under light illumination. Recently, their potential applications have been expanded beyond photodetection. Despite the considerable attention given to negative phototransistors, negative photoconductance (NPC) in particular remains relatively unexplored, with limited research advancements as compared to well-established positive phototransistors. In this study, we designed ferroelectric field-effect transistors (FeFETs) based on the WSe2/CIPS van der Waals (vdW) vertical heterostructures with a buried-gated architecture. The transistor exhibits NPC and positive photoconductance (PPC), demonstrating the significant role of ferroelectric polarization in the distinctive photoresponse. The observed inverse photoconductance can be attributed to the dynamic switching of ferroelectric polarization and interfacial charge transfer processes, which have been investigated experimentally and theoretically using Density Functional Theory (DFT). The unique phenomena enable the coexistence of controllable and polarity-switchable PPC and NPC. The novel feature holds tremendous potential for applications in optical encryption, where the specific gate voltages and light can serve as universal keys to achieve modulation of conductivity. The ability to manipulate conductivity in response to optical stimuli opens up new avenues for developing secure communication systems and data storage technologies. Harnessing this feature enables the design of advanced encryption schemes that rely on the unique properties of our material system. The study not only advances the development of NPC but also paves the way for more robust and efficient methods of optical encryption, ensuring the confidentiality and integrity of critical information in various domains, including data transmission, and information security.
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Affiliation(s)
- Aiping Cao
- Technical Center for Multifunctional Magneto-Optical Spectroscopy (Shanghai), Engineering Research Center of Nanophotonics & Advanced Instrument (Ministry of Education), Department of Physics, School of Physics and Electronic Science, East China Normal University, Shanghai 200241, China.
| | - Shubing Li
- Technical Center for Multifunctional Magneto-Optical Spectroscopy (Shanghai), Engineering Research Center of Nanophotonics & Advanced Instrument (Ministry of Education), Department of Physics, School of Physics and Electronic Science, East China Normal University, Shanghai 200241, China.
| | - Hongli Chen
- Technical Center for Multifunctional Magneto-Optical Spectroscopy (Shanghai), Engineering Research Center of Nanophotonics & Advanced Instrument (Ministry of Education), Department of Physics, School of Physics and Electronic Science, East China Normal University, Shanghai 200241, China.
| | - Menghan Deng
- Technical Center for Multifunctional Magneto-Optical Spectroscopy (Shanghai), Engineering Research Center of Nanophotonics & Advanced Instrument (Ministry of Education), Department of Physics, School of Physics and Electronic Science, East China Normal University, Shanghai 200241, China.
| | - Xionghu Xu
- Technical Center for Multifunctional Magneto-Optical Spectroscopy (Shanghai), Engineering Research Center of Nanophotonics & Advanced Instrument (Ministry of Education), Department of Physics, School of Physics and Electronic Science, East China Normal University, Shanghai 200241, China.
| | - Liyan Shang
- Technical Center for Multifunctional Magneto-Optical Spectroscopy (Shanghai), Engineering Research Center of Nanophotonics & Advanced Instrument (Ministry of Education), Department of Physics, School of Physics and Electronic Science, East China Normal University, Shanghai 200241, China.
| | - Yawei Li
- Technical Center for Multifunctional Magneto-Optical Spectroscopy (Shanghai), Engineering Research Center of Nanophotonics & Advanced Instrument (Ministry of Education), Department of Physics, School of Physics and Electronic Science, East China Normal University, Shanghai 200241, China.
| | - Anyang Cui
- Key Laboratory of Optoelectronic Material and Device, Department of Physics, Shanghai Normal University, Shanghai 200234, China
| | - Zhigao Hu
- Technical Center for Multifunctional Magneto-Optical Spectroscopy (Shanghai), Engineering Research Center of Nanophotonics & Advanced Instrument (Ministry of Education), Department of Physics, School of Physics and Electronic Science, East China Normal University, Shanghai 200241, China.
- Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, Shanxi 030006, China
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Zhao C, Gao Y, Song T, Wang J, Qiu J. An Er 3+-Doped Cs 2NaScCl 6 Lead-Free Double Perovskite with Efficient Broadband Visible to Near-Infrared Emission and Multimodal Upconversion Luminescence. J Phys Chem Lett 2023; 14:9011-9018. [PMID: 37782028 DOI: 10.1021/acs.jpclett.3c02321] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/03/2023]
Abstract
Lanthanide ions are widely used as dopants for halide perovskites for their broad energy level coverage from the visible to near-infrared (NIR) range. In this work, Cs2NaScCl6:Er3+ was synthesized by an improved solid-state reaction method, which showed effective NIR emission under ultraviolet excitation. Through calculations based on density functional theory and Bader charge analysis, it is shown that [ErCl6]3- octahedra show a strong localization effect in the Cs2NaScCl6:Er3+ lattice, which is conducive to the charge transfer process of Cl-Er3+, and charge transfer sensitization is responsible for the efficient visible to NIR luminescence of Er3+, where the NIR emission around λem = 1540 nm originated from the Er3+:4I13/2 → 4I15/2 transition with an ultrahigh photoluminescence quantum yield that reached ∼28.3%. Notably, Cs2NaScCl6:Er3+ also exhibited bright upconversion luminescence of green light (at 540 nm) under excitation by a variety of NIR laser diodes (808, 980, and 1550 nm) via self-sensitization processes.
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Affiliation(s)
- Chunli Zhao
- Faculty of Material Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China
| | - Yuan Gao
- Faculty of Material Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China
- Key Laboratory of Advanced Materials of Yunnan Province, Kunming 650093, China
| | - Tiantian Song
- Faculty of Material Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China
| | - Jing Wang
- School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou, Guangdong 510275, P. R. China
| | - Jianbei Qiu
- Faculty of Material Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China
- Key Laboratory of Advanced Materials of Yunnan Province, Kunming 650093, China
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8
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Paramanik S, Pal AJ. Combining negative photoconductivity and resistive switching towards in-memory logic operations. NANOSCALE 2023; 15:5001-5010. [PMID: 36786743 DOI: 10.1039/d3nr00278k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
A family of rudorffites based on silver-bismuth-iodide shows a transition from a conventional positive photoconductivity (PPC) to an unusual negative photoconductivity (NPC) upon variation in the precursor stoichiometry while forming the rudorffites. The NPC has arisen in silver-rich rudorffites due to the generation of illumination-induced trap-states which prompted the recombination of charge carriers and thereby a decrease in the conductivity of the compounds. In addition to photoconductivity, sandwiched devices based on all the rudorffites exhibited resistive switching between a pristine high resistive state (HRS) and a low resistive state (LRS) under a suitable voltage pulse; the switching process, which is reversible, is associated with a memory phenomenon. The devices based on NPC-exhibiting rudorffites switched to the HRS under illumination as well. That is, the resistive state of the devices could be controlled through both electrical and optical inputs. We employed such interesting optoelectronic properties of NPC-exhibiting rudorffites to exhibit OR logic gate operation. Because the devices could function as a logic gate and store the resistive state as well, we concluded that the materials could be an ideal candidate for in-memory logic operations.
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Affiliation(s)
- Subham Paramanik
- School of Physical Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India.
| | - Amlan J Pal
- School of Physical Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India.
- UGC-DAE Consortium for Scientific Research, University Campus, Khandwa Road, Indore 452001, India
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9
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Meng W, Wang C, Li Y, Hu G, Sui S, Xu G, Peng M, Deng Z. Synthesis of Efficient and Stable Tetrabutylammonium Copper Halides with Dual Emissions for Warm White Light-Emitting Diodes. Chemistry 2023; 29:e202202675. [PMID: 36599805 DOI: 10.1002/chem.202202675] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2022] [Revised: 12/23/2022] [Accepted: 12/27/2022] [Indexed: 01/06/2023]
Abstract
In order to achieve a high color-rendering index (CRI) and low correlated color temperature (CCT) indoor lighting, single-component phosphors with broad-band dual emission are in high demand for white-light-emitting diodes (WLEDs). However, phosphors with such fluorescent properties are rare at present. Herein, we report a facile solid-state chemical method for the synthesis of single-component phosphor with broad-band emission and a large Stokes shift that can meet the requirements of future white-light sources. These new tetrabutylammonium copper halides phosphors have excellent warm white emission characteristics, and their luminescence peaks are located at 494 and 654 nm. The optimized photoluminescence (PL) quantum yield can reach 93.7 %. The typical CIE coordinate of the as-fabricated WLED is at (0.3620, 0.3731) with a CRI of 89 and low CCT of 4516 K.
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Affiliation(s)
- Wen Meng
- College of Engineering and Applied Sciences, State Key Laboratory of Analytical Chemistry for Life Science, Nanjing National Laboratory of Microstructures, Nanjing University, Nanjing, Jiangsu, 210023, P. R. China
| | - Chuying Wang
- College of Engineering and Applied Sciences, State Key Laboratory of Analytical Chemistry for Life Science, Nanjing National Laboratory of Microstructures, Nanjing University, Nanjing, Jiangsu, 210023, P. R. China
| | - Yacong Li
- College of Engineering and Applied Sciences, State Key Laboratory of Analytical Chemistry for Life Science, Nanjing National Laboratory of Microstructures, Nanjing University, Nanjing, Jiangsu, 210023, P. R. China
| | - Guangcai Hu
- College of Engineering and Applied Sciences, State Key Laboratory of Analytical Chemistry for Life Science, Nanjing National Laboratory of Microstructures, Nanjing University, Nanjing, Jiangsu, 210023, P. R. China
| | - Shiqi Sui
- College of Engineering and Applied Sciences, State Key Laboratory of Analytical Chemistry for Life Science, Nanjing National Laboratory of Microstructures, Nanjing University, Nanjing, Jiangsu, 210023, P. R. China
| | - Guangyong Xu
- College of Engineering and Applied Sciences, State Key Laboratory of Analytical Chemistry for Life Science, Nanjing National Laboratory of Microstructures, Nanjing University, Nanjing, Jiangsu, 210023, P. R. China
| | - Min Peng
- College of Engineering and Applied Sciences, State Key Laboratory of Analytical Chemistry for Life Science, Nanjing National Laboratory of Microstructures, Nanjing University, Nanjing, Jiangsu, 210023, P. R. China
| | - Zhengtao Deng
- College of Engineering and Applied Sciences, State Key Laboratory of Analytical Chemistry for Life Science, Nanjing National Laboratory of Microstructures, Nanjing University, Nanjing, Jiangsu, 210023, P. R. China
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10
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Kumar A, Nath P, Kumar V, Kumar Tailor N, Satapathi S. 3D printed optical sensor for highly sensitive detection of picric acid using perovskite nanocrystals and mechanism of photo-electron transfer. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 286:121956. [PMID: 36252303 DOI: 10.1016/j.saa.2022.121956] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2022] [Revised: 10/01/2022] [Accepted: 10/05/2022] [Indexed: 06/16/2023]
Abstract
Hand-held, compact and portable sensors for on-site detection of environmental contaminants are in high demand for industry 4.0. Here, we have developed a sensor based on luminescent organic-inorganic metal halide hybrid perovskites nanocrystals (CH3NH3PbBr3) with p-xylylenediamine as an additional capping agent for highly sensitive and selective detection of picric acid (PA), with a good linear range of 1.8 μM-14.3 μM achieving detection of limit (LOD) of 0.3 μM. The electrostatic interaction between PA and the capping ligand of perovskite nanocrystals resulted in significant fluorescence quenching, as revealed by the steady-state and time-resolved spectroscopy. The applicability of the developed sensor for PA detection was validated with a 3D printed device integrating surface mounting device (SMD) and paper microfluidics. This prototype device was successfully applied as a fluorescence turn-off sensor to detect PA, showing great potential for on-site detection. This 3D-printed paper-based microfluidic optical sensor proved very efficient for naked-eye detection of PA with an inbuilt excitation source, avoiding the requirement of expensive and complex instrumentation.
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Affiliation(s)
- Anshu Kumar
- Department of Physics, Indian Institute of Technology Roorkee, Roorkee, Haridwar, Uttarakhand 247667, India.
| | - Prathul Nath
- Department of Physics, Indian Institute of Technology Roorkee, Roorkee, Haridwar, Uttarakhand 247667, India.
| | - Vishal Kumar
- Department of Physics, Indian Institute of Technology Roorkee, Roorkee, Haridwar, Uttarakhand 247667, India.
| | - Naveen Kumar Tailor
- Department of Physics, Indian Institute of Technology Roorkee, Roorkee, Haridwar, Uttarakhand 247667, India.
| | - Soumitra Satapathi
- Department of Physics, Indian Institute of Technology Roorkee, Roorkee, Haridwar, Uttarakhand 247667, India.
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Evaluation of congo red dye doped magnesium sulphate crystal and their structural, optical, morphological, electrical and biological activities. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.132837] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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Tailor NK, Maity P, Satapathi S. Phonon-Mediated Slow Hot Carrier Dynamics in Lead-Free Cs 3Bi 2I 9 Perovskite Single Crystal. J Phys Chem Lett 2022; 13:5260-5266. [PMID: 35674417 DOI: 10.1021/acs.jpclett.2c01369] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
In this report, we study the hot carrier cooling mechanism of the Cs3Bi2I9 single crystal by using femtosecond transient reflectance (fs-TR) spectroscopy. We find an unusual slow hot carrier cooling associated with longitudinal optical (LO) and coherent longitudinal acoustic phonons (CLAPs) emission during the deexcitation of the hot carriers. We posit the interplay between the hot-carriers and the LO and CLA phonons in subpicosecond to subnanosecond time scales, respectively, by analyzing the TR kinetics upon perturbation with excess energy. Furthermore, we measured the CLAPs propagation velocity in Cs3Bi2I9, the crystal, ranging from 1820 to 2000 ms-1. The elastic constants and frequency of Brillouin oscillations were estimated as 20.08 GPa and 14.66 GHz, respectively. Our discovery delivers new physical insights into how the hot carriers in Cs3Bi2I9 single crystal are coupled with a crystal lattice that controls the hot carrier dynamics.
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Affiliation(s)
- Naveen Kumar Tailor
- Department of Physics, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247667, India
| | - Partha Maity
- Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia
| | - Soumitra Satapathi
- Department of Physics, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247667, India
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Mala M, Appadurai T, Chandiran AK. Structural distortion induced broad emission in vacancy-ordered halide triple perovskites. Dalton Trans 2022; 51:2789-2797. [DOI: 10.1039/d1dt03474j] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The structural distortion in halide perovskites is important to tune the optical properties of materials. The octahedra formed by metal cation and halide anions in these classes of materials remain...
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Ye X, Cai H, Sun Q, Xu T, Ni J, Li J, Zhang J. Organic spacer engineering in 2D/3D hybrid perovskites for efficient and stable solar cells. NEW J CHEM 2022. [DOI: 10.1039/d1nj05232b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The PMAI-based PSCs form multiple NH⋯I hydrogen bonds, which can passivate interface defects and suppress ion migration and diffusion.
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Affiliation(s)
- Xiaofang Ye
- Department of Electronic Science and Technology, College of Electronic Information and Optical Engineering, Nankai University, Tianjin 300350, China
| | - Hongkun Cai
- Department of Electronic Science and Technology, College of Electronic Information and Optical Engineering, Nankai University, Tianjin 300350, China
- Key Laboratory of Photoelectronic Thin Film Devices and Technology of Tianjin, Tianjin, 300350, China
| | - Qinghe Sun
- Department of Electronic Science and Technology, College of Electronic Information and Optical Engineering, Nankai University, Tianjin 300350, China
| | - Tie Xu
- Department of Electronic Science and Technology, College of Electronic Information and Optical Engineering, Nankai University, Tianjin 300350, China
| | - Jian Ni
- Department of Electronic Science and Technology, College of Electronic Information and Optical Engineering, Nankai University, Tianjin 300350, China
- Key Laboratory of Photoelectronic Thin Film Devices and Technology of Tianjin, Tianjin, 300350, China
| | - Juan Li
- Department of Electronic Science and Technology, College of Electronic Information and Optical Engineering, Nankai University, Tianjin 300350, China
- Key Laboratory of Photoelectronic Thin Film Devices and Technology of Tianjin, Tianjin, 300350, China
| | - Jianjun Zhang
- Department of Electronic Science and Technology, College of Electronic Information and Optical Engineering, Nankai University, Tianjin 300350, China
- Key Laboratory of Photoelectronic Thin Film Devices and Technology of Tianjin, Tianjin, 300350, China
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Geng Y, Yang B, Xiang Y, Shi M, Hu R, Guo C, Li Y, Zou J. Preparation and Research of Perovskite Quantum Dots Powder Based on RbCl Doped CsPbBr
3. ChemistrySelect 2021. [DOI: 10.1002/slct.202101737] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Yuxiao Geng
- School of Science Shanghai Institute of Technology Shanghai 201418 PR China
| | - Bobo Yang
- School of Science Shanghai Institute of Technology Shanghai 201418 PR China
- Institute of Future Lighting Academy for Engineering and Technology Fudan University Shanghai 200433 PR China
| | - Yanrong Xiang
- School of Science Shanghai Institute of Technology Shanghai 201418 PR China
| | - Mingming Shi
- School of Science Shanghai Institute of Technology Shanghai 201418 PR China
| | - Rongrong Hu
- School of Science Shanghai Institute of Technology Shanghai 201418 PR China
| | - Chunfeng Guo
- School of Science Shanghai Institute of Technology Shanghai 201418 PR China
| | - Yuefeng Li
- School of Science Shanghai Institute of Technology Shanghai 201418 PR China
| | - Jun Zou
- School of Science Shanghai Institute of Technology Shanghai 201418 PR China
- Institute of New Materials & Industrial Technology Wenzhou University Wenzhou 325024 PR China
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Tailor NK, Senanayak SP, Abdi-Jalebi M, Satapathi S. Low-frequency carrier kinetics in triple cation perovskite solar cells probed by impedance and modulus spectroscopy. Electrochim Acta 2021. [DOI: 10.1016/j.electacta.2021.138430] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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