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Zhu S, Xiong F, Gu Y, Chen W, Fan Q, Lu H, Wang T, Yang BR, Deng S. Low Driving Voltage Electroluminescence Device for Integrated Visual Strain Sensing. ACS APPLIED MATERIALS & INTERFACES 2024; 16:31657-31665. [PMID: 38838205 DOI: 10.1021/acsami.4c06993] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2024]
Abstract
As a pivotal component in human-machine interactions, display devices have undergone rapid development in modern life. Displays such as alternative current electroluminescence|alternative current electroluminescent (ACEL) devices with high flexibility and long operational lifetimes are essential for wearable electronics. However, ACEL devices are constrained by their inherent high driving voltage and complex fabrication processes. Our work presents an easy blade-coating method for fabricating flexible ACEL display devices based on an all-solution process. By dispersing BaTiO3 and ZnS/Cu powder into waterborne polyurethane, we successfully combined dielectric and fluorescence functionalities within a single layer, significantly reducing the device's driving voltage. Additionally, the ionic conducting hydrogel was chosen as a transparent electrode to achieve good electrical contact and strong interfacial adhesion through in situ polymerization. Owing to the unique method, our ACEL device exhibits high flexibility, low driving voltage (20-100 V), high brightness (300+ cd/m2 at 60 V), and environmental friendliness. Furthermore, by repurposing the hydrogel electrode, we integrated strain visualization capabilities within a single device, highlighting its potential for applications such as wearable healthcare monitoring.
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Affiliation(s)
- Simu Zhu
- State Key Laboratory of Optoelectronic Materials and Technologies, Guangdong Province Key Laboratory of Display Material and Technology, School of Electronics and Information Technology, Sun Yat-sen University, Guangzhou 510275, China
| | - Feng Xiong
- State Key Laboratory of Optoelectronic Materials and Technologies, Guangdong Province Key Laboratory of Display Material and Technology, School of Electronics and Information Technology, Sun Yat-sen University, Guangzhou 510275, China
| | - Yifan Gu
- State Key Laboratory of Optoelectronic Materials and Technologies, Guangdong Province Key Laboratory of Display Material and Technology, School of Electronics and Information Technology, Sun Yat-sen University, Guangzhou 510275, China
| | - Weichun Chen
- State Key Laboratory of Optoelectronic Materials and Technologies, Guangdong Province Key Laboratory of Display Material and Technology, School of Electronics and Information Technology, Sun Yat-sen University, Guangzhou 510275, China
| | - Qitian Fan
- State Key Laboratory of Optoelectronic Materials and Technologies, Guangdong Province Key Laboratory of Display Material and Technology, School of Electronics and Information Technology, Sun Yat-sen University, Guangzhou 510275, China
| | - Hao Lu
- State Key Laboratory of Optoelectronic Materials and Technologies, Guangdong Province Key Laboratory of Display Material and Technology, School of Electronics and Information Technology, Sun Yat-sen University, Guangzhou 510275, China
| | - Ting Wang
- State Key Laboratory of Optoelectronic Materials and Technologies, Guangdong Province Key Laboratory of Display Material and Technology, School of Electronics and Information Technology, Sun Yat-sen University, Guangzhou 510275, China
| | - Bo-Ru Yang
- State Key Laboratory of Optoelectronic Materials and Technologies, Guangdong Province Key Laboratory of Display Material and Technology, School of Electronics and Information Technology, Sun Yat-sen University, Guangzhou 510275, China
| | - Shaozhi Deng
- State Key Laboratory of Optoelectronic Materials and Technologies, Guangdong Province Key Laboratory of Display Material and Technology, School of Electronics and Information Technology, Sun Yat-sen University, Guangzhou 510275, China
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2
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Mushtaq U, Ayoub I, Kumar V, Sharma V, Swart HC, Chamanehpour E, Rubahn HG, Mishra YK. Persistent luminescent nanophosphors for applications in cancer theranostics, biomedical, imaging and security. Mater Today Bio 2023; 23:100860. [PMID: 38179230 PMCID: PMC10765243 DOI: 10.1016/j.mtbio.2023.100860] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Revised: 10/24/2023] [Accepted: 11/07/2023] [Indexed: 01/06/2024] Open
Abstract
The extraordinary and unique properties of persistent luminescent (PerLum) nanostructures like storage of charge carriers, extended afterglow, and some other fascinating characteristics like no need for in-situ excitation, and rechargeable luminescence make such materials a primary candidate in the fields of bio-imaging and therapeutics. Apart from this, due to their extraordinary properties they have also found their place in the fields of anti-counterfeiting, latent fingerprinting (LPF), luminescent markings, photocatalysis, solid-state lighting devices, glow-in-dark toys, etc. Over the past few years, persistent luminescent nanoparticles (PLNPs) have been extensively used for targeted drug delivery, bio-imaging guided photodynamic and photo-thermal therapy, biosensing for cancer detection and subsequent treatment, latent fingerprinting, and anti-counterfeiting owing to their enhanced charge storage ability, in-vitro excitation, increased duration of time between excitation and emission, low tissue absorption, high signal-to-noise ratio, etc. In this review, we have focused on most of the key aspects related to PLNPs, including the different mechanisms leading to such phenomena, key fabrication techniques, properties of hosts and different activators, emission, and excitation characteristics, and important properties of trap states. This review article focuses on recent advances in cancer theranostics with the help of PLNPs. Recent advances in using PLNPs for anti-counterfeiting and latent fingerprinting are also discussed in this review.
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Affiliation(s)
- Umer Mushtaq
- Department of Physics, National Institute of Technology Srinagar, Jammu and Kashmir, 190006, India
- Department of Physics, University of the Free State, P.O. Box 339, Bloemfontein, ZA9300, South Africa
| | - Irfan Ayoub
- Department of Physics, National Institute of Technology Srinagar, Jammu and Kashmir, 190006, India
- Department of Physics, University of the Free State, P.O. Box 339, Bloemfontein, ZA9300, South Africa
| | - Vijay Kumar
- Department of Physics, National Institute of Technology Srinagar, Jammu and Kashmir, 190006, India
- Department of Physics, University of the Free State, P.O. Box 339, Bloemfontein, ZA9300, South Africa
| | - Vishal Sharma
- Institute of Forensic Science & Criminology, Panjab University, Chandigarh, 160014, India
| | - Hendrik C. Swart
- Department of Physics, University of the Free State, P.O. Box 339, Bloemfontein, ZA9300, South Africa
| | - Elham Chamanehpour
- NanoSYD, Mads Clausen Institute, University of Southern Denmark, Alsion 2, Sønderborg, 6400, Denmark
| | - Horst-Günter Rubahn
- NanoSYD, Mads Clausen Institute, University of Southern Denmark, Alsion 2, Sønderborg, 6400, Denmark
| | - Yogendra Kumar Mishra
- NanoSYD, Mads Clausen Institute, University of Southern Denmark, Alsion 2, Sønderborg, 6400, Denmark
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Zhang C, Uchikoshi T, Takeda T, Hirosaki N. Research progress on surface modifications for phosphors used in light-emitting diodes (LEDs). Phys Chem Chem Phys 2023; 25:24214-24233. [PMID: 37691583 DOI: 10.1039/d3cp01658g] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/12/2023]
Abstract
Stable and efficient phosphors are highly important for light-emitting diodes (LEDs) with respect to their application in solid-state lighting, instead of conventional lamps for general lighting. However, some problems, like low stability, low photoluminescence (PL) efficiency, and serious thermal degradation, are commonly encountered in phosphors, limiting their applications in LEDs. Surface modifications for some phosphors commonly used in LED lighting, including fluoride, sulphide, silicate, oxide, nitride, and oxynitride phosphors, are presented in this review. By forming a protective surface layer, the stabilities against moisture and high temperature of fluoride- and sulphide-based phosphors were strengthened; by coating inorganic and organic materials around the particle surface, the PL efficiencies of silicate- and oxide-based phosphors were improved; by passivation treatment upon the phosphor surface, the thermal degradation of nitride- and oxynitride-based phosphors was reduced. Various technologies for surface modification are described in detail; moreover, the mechanisms of stability strengthening, PL efficiency improvement, and thermal degradation reduction are explained. In addition, embedding of phosphors in inorganic glass matrix, especially for quantum dots, is also introduced as an effective method to improve phosphor stability for LED applications. Finally, future developments of surface modification of phosphors are proposed.
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Affiliation(s)
- Chenning Zhang
- Department of Chemical Science and Technology, Hosei University, Koganei, Tokyo 184-8584, Japan.
- Research Center for Electronic and Optical Materials, National Institute for Materials Science, Tsukuba, Ibaraki 305-0047, Japan.
| | - Tetsuo Uchikoshi
- Research Center for Electronic and Optical Materials, National Institute for Materials Science, Tsukuba, Ibaraki 305-0047, Japan.
| | - Takashi Takeda
- Research Center for Electronic and Optical Materials, National Institute for Materials Science, Tsukuba, Ibaraki 305-0047, Japan.
| | - Naoto Hirosaki
- Research Center for Electronic and Optical Materials, National Institute for Materials Science, Tsukuba, Ibaraki 305-0047, Japan.
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González-Penguelly B, Pérez-Sánchez GG, Medina-Velázquez DY, Martínez-Falcón P, Morales-Ramírez ADJ. Luminescence Properties and Energy Transfer of Eu 3+, Bi 3+ Co-Doped LuVO 4 Films Modified with Pluronic F-127 Obtained by Sol-Gel. MATERIALS (BASEL, SWITZERLAND) 2022; 16:146. [PMID: 36614484 PMCID: PMC9821254 DOI: 10.3390/ma16010146] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Revised: 11/28/2022] [Accepted: 12/01/2022] [Indexed: 06/17/2023]
Abstract
Nowadays, orthovanadates are studied because of their unique properties for optoelectronic applications. In this work, the LuVO4:Eu3+, Bi3+ films were prepared by the sol-gel method, using a new simple route, and deposited by the dip-coating technique. The obtained films are transparent, fracture-free, and homogenous. The sol-gel process was monitored by Fourier-transform infrared spectroscopy (FTIR), and according to X-ray diffraction (XRD) results, the crystal structure was tetragonal, and films that were highly oriented along the (200) low-energy direction were obtained. The morphological studies by scanning electron microscopy (SEM) showed uniformly distributed circular agglomerations of rice-like particles with nanometric sizes. The luminescence properties of the films were analyzed using a fixed concentration of 2.5 at. % Eu3+ and different concentrations of Bi3+ (0.5, 1.0, and 1.5 at. %); all the samples emit in red, and it has been observed that the light yield of Eu3+ is enhanced as the Bi3+ content increases when the films are excited at 350 nm, which corresponds to the 1S0→3P1 transition of Bi3+. Therefore, a highly efficient energy transfer mechanism between Bi3+ and Eu3+ has been observed, reaching up to 71%. Finally, it was established that this energy transfer process occurs via a quadrupole-quadrupole interaction.
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Affiliation(s)
- Brenely González-Penguelly
- División de Ciencias Básicas e Ingeniería, Universidad Autónoma Metropolitana-Azcapotzalco, Ciencias Básicas e Ingeniería, Av. San Pablo No. 180, CDMX 02200, Mexico
- Centro Universitario UAEM Valle de Mexico, Boulevard Universitario S/N Valle Escondido, Río San Javier, Cd López Mateos 54500, Mexico
| | - Grethell Georgina Pérez-Sánchez
- División de Ciencias Básicas e Ingeniería, Universidad Autónoma Metropolitana-Azcapotzalco, Ciencias Básicas e Ingeniería, Av. San Pablo No. 180, CDMX 02200, Mexico
| | - Dulce Yolotzin Medina-Velázquez
- División de Ciencias Básicas e Ingeniería, Universidad Autónoma Metropolitana-Azcapotzalco, Ciencias Básicas e Ingeniería, Av. San Pablo No. 180, CDMX 02200, Mexico
| | - Paulina Martínez-Falcón
- División de Ciencias Básicas e Ingeniería, Universidad Autónoma Metropolitana-Azcapotzalco, Ciencias Básicas e Ingeniería, Av. San Pablo No. 180, CDMX 02200, Mexico
| | - Angel de Jesús Morales-Ramírez
- Instituto Politécnico Nacional, CIITEC IPN, Cerrada de Cecati S/N Col. Santa Catarina, Azcapotzalco, CDMX 02250, Mexico
- Instituto Politécnico Nacional, ESIQIE IPN, Av. Luis Enrique Erro S/N, Nueva Industrial Vallejo, Gustavo A. Madero, CDMX 07738, Mexico
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5
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Shi H, Yao W, Ye W, Ma H, Huang W, An Z. Ultralong Organic Phosphorescence: From Material Design to Applications. Acc Chem Res 2022; 55:3445-3459. [PMID: 36368944 DOI: 10.1021/acs.accounts.2c00514] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Organic phosphorescence is defined as a radiative transition between the different spin multiplicities of an organic molecule after excitation; here, we refer to the photoexcitation. Unlike fluorescence, it shows a long emission lifetime (∼μs), large Stokes shift, and rich excited state properties, attracting considerable attention in organic electronics during the past years. Ultralong organic phosphorescence (UOP), a type of persistent luminescence in organic phosphors, shows an emission lifetime of over 100 ms normally according to the resolution limit of the naked eye. According to the Jablonski energy diagram, two prerequisites are necessary for UOP generation and enhancement. One is to promote intersystem crossing (ISC) of the excitons from the excited singlet to triplet states by enhancing the spin-orbit coupling (SOC); the other is to suppress the nonradiative transitions of the excitons from the excited triplet states.In this Account, we will give a summary of our research on ultralong organic phosphorescence, including the design of materials, manipulation of properties, fabrication of nano/microstructures, and function applications. First, we give a brief introduction to the UOP development. Then, we discuss the constructed methods of UOP materials from the inter/intramolecular interaction types, including π-π interactions, intermolecular hydrogen bonds, halogen bonds, ionic bonds, covalent bonds, and so on. These effective interactions can build a rigid environment to restrain the nonradiative transitions from the molecular motions or external quenching by oxygen, moisture, or heat, and thus enhance the UOP performance. Next, the manipulation of UOP properties, containing excitation wavelength, emission colors, lifetimes, and quantum efficiency (QE), through molecular or crystal engineering will be summarized. Recently, the excitation wavelengths of the materials for UOP can be regulated in different regions, such as UV, visible light, and X-ray; the emission colors of UOP can cover the whole visible-light region, from deep blue to red; the phosphorescence lifetime of UOP materials can reach 2.5 s, and the quantum efficiency can be achieved up to 96.5%. Moreover, we will present the fabrication of micro/nanoscale UOP materials, including the preparation of micro/nanostructure, optical performance, and device fabrication. Afterward, we will review the potential applications of UOP materials in organic/bio-optoelectronics, such as information encryption, bioimaging, sensing, afterglow display, etc. Finally, an outlook on the development of UOP materials and applications will be proposed.
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Affiliation(s)
- Huifang Shi
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing211816, China
- State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing210023, China
| | - Wei Yao
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing211816, China
| | - Wenpeng Ye
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing211816, China
| | - Huili Ma
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing211816, China
| | - Wei Huang
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing211816, China
- State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing210023, China
- Frontiers Science Center for Flexible Electronics, Xi'an Institute of Flexible Electronics (IFE), Northwestern Polytechnical University, 127 West Youyi Road, Xi'an710072, China
| | - Zhongfu An
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing211816, China
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6
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Sosnov EA, Malkov AA, Malygin AA. Nanotechnology of Molecular Layering in Production of Inorganic and Hybrid Materials for Various Functional Purposes: II. Molecular Layering Technology and Prospects for Its Commercialization and Development in the XXI Century. RUSS J APPL CHEM+ 2021. [DOI: 10.1134/s1070427221090020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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7
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Rosa J, Heikkilä MJ, Sirkiä M, Merdes S. Red Y 2O 3:Eu-Based Electroluminescent Device Prepared by Atomic Layer Deposition for Transparent Display Applications. MATERIALS 2021; 14:ma14061505. [PMID: 33808550 PMCID: PMC8003329 DOI: 10.3390/ma14061505] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Revised: 03/15/2021] [Accepted: 03/16/2021] [Indexed: 12/02/2022]
Abstract
Y2O3:Eu is a promising red-emitting phosphor owing to its high luminance efficiency, chemical stability, and non-toxicity. Although Y2O3:Eu thin films can be prepared by various deposition methods, most of them require high processing temperatures in order to obtain a crystalline structure. In this work, we report on the fabrication of red Y2O3:Eu thin film phosphors and multilayer structure Y2O3:Eu-based electroluminescent devices by atomic layer deposition at 300 °C. The structural and optical properties of the phosphor films were investigated using X-ray diffraction and photoluminescence measurements, respectively, whereas the performance of the fabricated device was evaluated using electroluminescence measurements. X-ray diffraction measurements show a polycrystalline structure of the films whereas photoluminescence shows emission above 570 nm. Red electroluminescent devices with a luminance up to 40 cd/m2 at a driving frequency of 1 kHz and an efficiency of 0.28 Lm/W were achieved.
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Affiliation(s)
- José Rosa
- Beneq Oy, Olarinluoma 9, FI-02200 Espoo, Finland; (J.R.); (M.S.)
| | - Mikko J. Heikkilä
- Department of Chemistry, University of Helsinki, P.O. Box 55, FI-00014 Helsinki, Finland;
| | - Mika Sirkiä
- Beneq Oy, Olarinluoma 9, FI-02200 Espoo, Finland; (J.R.); (M.S.)
| | - Saoussen Merdes
- Beneq Oy, Olarinluoma 9, FI-02200 Espoo, Finland; (J.R.); (M.S.)
- Correspondence:
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8
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Kumar M, Nandi M, Pakshirajan K. Recent advances in heavy metal recovery from wastewater by biogenic sulfide precipitation. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2021; 278:111555. [PMID: 33157464 DOI: 10.1016/j.jenvman.2020.111555] [Citation(s) in RCA: 44] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Revised: 09/15/2020] [Accepted: 10/19/2020] [Indexed: 05/26/2023]
Abstract
Biological sulfide precipitation by sulfate reducing bacteria (SRB) is an emerging technique for the recovery of heavy metals from metal contaminated wastewater. Advantages of this technique include low capital cost, ability to form highly insoluble salts, and capability to remove and recover heavy metals even at very low concentrations. Therefore, sulfate reduction under anaerobic conditions has become a suitable alternative for the treatment of wastewaters that contain metals. However, bioreactor configurations for recovery of metals from sulfate rich metallic wastewater have not been explored widely. Moreover, the recovered metal sulfide nanoparticles could be applied in various fields such as solar cells, dye degradation, electroplating, etc. Hence, metal recovery in the form of nanoparticles from wastewater could serve as an incentive for industries. The simultaneous metal removal and recovery can be achieved in either a single-stage or multistage systems. This paper aims to present an overview of the different bioreactor configurations for the treatment of wastewater containing sulfate and metal along with their advantages and drawbacks for metal recovery. Currently followed biological strategies to mitigate sulfate and metal rich wastewater are evaluated in detail in this review.
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Affiliation(s)
- Manoj Kumar
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India.
| | - Moumita Nandi
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India
| | - Kannan Pakshirajan
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India
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9
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Bulyk LI, Vasylechko L, Mykhaylyk V, Tang C, Zhydachevskyy Y, Hizhnyi YA, Nedilko SG, Klyui NI, Suchocki A. Mn 2+ luminescence of Gd(Zn,Mg)B 5O 10 pentaborate under high pressure. Dalton Trans 2020; 49:14268-14279. [PMID: 33029603 DOI: 10.1039/d0dt01851a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The results of X-ray diffraction studies of the Gd(Mg0.95-x,ZnxMn-0.05)B5O10 down-converting phosphor as a function of Mg-Zn composition are presented. The lattice parameters and unit cell volumes of GdMg0.95-xZnxMn0.05B5O10 pentaborates are examined. The relationships between the structure and optical properties of these materials are explicated based on the results of theoretical calculations of the energy structure. The effect of pressure on the luminescence of Mn2+ in this system was studied up to ca. 32 GPa. The observed quenching of Mn2+ luminescence is due to the crossing of the emitting 4T1g level with the non-emitting 2T2g state. This crossing sets a long-wavelength limit on the possibility of observing the emission of Mn2+ ions, which is around 850 nm.
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Affiliation(s)
- L-I Bulyk
- Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, Warsaw 02-668, Poland.
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10
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Chen Y, Wei X, Li H, Fan Y, Hu W, Zhu G. Stretchable Hybrid Bilayered Luminescent Composite Based on the Combination of Strain-Induced and Triboelectrification-Induced Electroluminescence. ACS OMEGA 2019; 4:20470-20475. [PMID: 31858030 PMCID: PMC6906773 DOI: 10.1021/acsomega.9b01717] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2019] [Accepted: 09/10/2019] [Indexed: 06/02/2023]
Abstract
High luminescence intensity from materials that are excited by external stimuli is highly desired. In this work, a stretchable hybrid luminescent composite (HLC) that has multiple luminescence modes is reported. The luminescence can be excited either by externally applied mechanical strain or by a moving object that slides against the HLC. When the HLC is deformed, such as being twisted or folded, the ZnS/Cu phosphor experiences mechanical strain that trigger the mechanoluminescence (ML) of the phosphors. Moreover, as the HLC slides against a contact object, the triboelectrification at the contact interface induces the electroluminescence of phosphor. Here, a series of internal and external factors were studied on how they influence the luminescent intensity. It is found that the luminescent intensity from the two modes can be superposed. The HLC material was used to fabricate a fiber-based luminescent device that can be driven by air flow. The overall luminescent intensity is enhanced by over 72% compared to that obtained solely from the ML. The HLC reported in this work has such potential applications as self-powered light sources and sensors as means of detecting dynamic motions and interaction.
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Affiliation(s)
- Yanghui Chen
- CAS Center for Excellence in Nanoscience, Beijing Key Laboratory
of Micro−Nano Energy and Sensor, Beijing Institute of Nanoenergy
and Nanosystems, and Institute of Semiconductors, Chinese Academy
of Sciences, Beijing 100083, China
- School
of Nanoscience and Technology, University
of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiaoyan Wei
- CAS Center for Excellence in Nanoscience, Beijing Key Laboratory
of Micro−Nano Energy and Sensor, Beijing Institute of Nanoenergy
and Nanosystems, and Institute of Semiconductors, Chinese Academy
of Sciences, Beijing 100083, China
- School
of Nanoscience and Technology, University
of Chinese Academy of Sciences, Beijing 100049, China
| | - Huayang Li
- CAS Center for Excellence in Nanoscience, Beijing Key Laboratory
of Micro−Nano Energy and Sensor, Beijing Institute of Nanoenergy
and Nanosystems, and Institute of Semiconductors, Chinese Academy
of Sciences, Beijing 100083, China
- School
of Nanoscience and Technology, University
of Chinese Academy of Sciences, Beijing 100049, China
| | - Youjun Fan
- CAS Center for Excellence in Nanoscience, Beijing Key Laboratory
of Micro−Nano Energy and Sensor, Beijing Institute of Nanoenergy
and Nanosystems, and Institute of Semiconductors, Chinese Academy
of Sciences, Beijing 100083, China
- School
of Nanoscience and Technology, University
of Chinese Academy of Sciences, Beijing 100049, China
| | - Weiguo Hu
- CAS Center for Excellence in Nanoscience, Beijing Key Laboratory
of Micro−Nano Energy and Sensor, Beijing Institute of Nanoenergy
and Nanosystems, and Institute of Semiconductors, Chinese Academy
of Sciences, Beijing 100083, China
- School
of Nanoscience and Technology, University
of Chinese Academy of Sciences, Beijing 100049, China
| | - Guang Zhu
- CAS Center for Excellence in Nanoscience, Beijing Key Laboratory
of Micro−Nano Energy and Sensor, Beijing Institute of Nanoenergy
and Nanosystems, and Institute of Semiconductors, Chinese Academy
of Sciences, Beijing 100083, China
- School
of Nanoscience and Technology, University
of Chinese Academy of Sciences, Beijing 100049, China
- New
Materials Institute, Department of Mechanical, Materials and Manufacturing
Engineering, University of Nottingham Ningbo
China, Ningbo 315100, China
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11
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Kniec K, Ledwa K, Marciniak L. Enhancing the Relative Sensitivity of V 5+, V 4+ and V 3+ Based Luminescent Thermometer by the Optimization of the Stoichiometry of Y 3Al 5-xGa xO 12 Nanocrystals. NANOMATERIALS 2019; 9:nano9101375. [PMID: 31557921 PMCID: PMC6836024 DOI: 10.3390/nano9101375] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/17/2019] [Revised: 09/09/2019] [Accepted: 09/24/2019] [Indexed: 01/03/2023]
Abstract
In this work the influence of the Ga3+ concentration on the luminescent properties and the abilities of the Y3Al5−xGaxO12: V nanocrystals to noncontact temperature sensing were investigated. It was shown that the increase of the Ga3+ amount enables enhancement of V4+ emission intensity in respect to the V3+ and V5+ and thus modify the color of emission. The introduction of Ga3+ ions provides the appearance of the crystallographic sites, suitable for V4+ occupation. Consequently, the increase of V4+ amount facilitates V5+ → V4+ interionic energy transfer throughout the shortening of the distance between interacting ions. The opposite thermal dependence of V4+ and V5+ emission intensities enables to create the bandshape luminescent thermometr of the highest relative sensitivity of V-based luminescent thermometers reported up to date (Smax, 2.64%/°C, for Y3Al2Ga3O12 at 0 °C). An approach of tuning the performance of Y3Al5−xGaxO12: V nanocrystals to luminescent temperature sensing, including the spectral response, maximal relative sensitivity and usable temperature range, by the Ga3+ doping was presented and discussed.
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Affiliation(s)
- Karolina Kniec
- Institute of Low Temperature and Structure Research, Polish Academy of Sciences, Okólna 2, 50-422 Wroclaw, Poland.
| | - Karolina Ledwa
- Institute of Low Temperature and Structure Research, Polish Academy of Sciences, Okólna 2, 50-422 Wroclaw, Poland.
| | - Lukasz Marciniak
- Institute of Low Temperature and Structure Research, Polish Academy of Sciences, Okólna 2, 50-422 Wroclaw, Poland.
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12
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Kubiak PS, Johnson AL, Cameron PJ, Kociok-Köhn G. Single Source Precursors for Calcium Sulfide (CaS) Deposition. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201900550] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Peter. S. Kubiak
- Department of Chemistry; University of Bath; Claverton Down BA2 7AY Bath UK
| | - Andrew L. Johnson
- Department of Chemistry; University of Bath; Claverton Down BA2 7AY Bath UK
| | - Petra J. Cameron
- Department of Chemistry; University of Bath; Claverton Down BA2 7AY Bath UK
| | - Gabriele Kociok-Köhn
- Materials and Chemical Characterisation (MC²) Facility,; University of Bath; Claverton Down BA2 7AY Bath UK
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13
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Zhang M, Zheng W, Liu Y, Huang P, Gong Z, Wei J, Gao Y, Zhou S, Li X, Chen X. A New Class of Blue‐LED‐Excitable NIR‐II Luminescent Nanoprobes Based on Lanthanide‐Doped CaS Nanoparticles. Angew Chem Int Ed Engl 2019; 58:9556-9560. [DOI: 10.1002/anie.201905040] [Citation(s) in RCA: 67] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2019] [Indexed: 01/01/2023]
Affiliation(s)
- Meiran Zhang
- CAS Key Laboratory of Design and Assembly of Functional NanostructuresFujian Key Laboratory of NanomaterialsFujian Institute of Research on the Structure of MatterChinese Academy of Sciences Fuzhou Fujian 350002 China
- College of Chemistry and Materials ScienceFujian Normal University Fuzhou Fujian 350007 China
| | - Wei Zheng
- CAS Key Laboratory of Design and Assembly of Functional NanostructuresFujian Key Laboratory of NanomaterialsFujian Institute of Research on the Structure of MatterChinese Academy of Sciences Fuzhou Fujian 350002 China
- College of Chemistry and Materials ScienceFujian Normal University Fuzhou Fujian 350007 China
| | - Yan Liu
- CAS Key Laboratory of Design and Assembly of Functional NanostructuresFujian Key Laboratory of NanomaterialsFujian Institute of Research on the Structure of MatterChinese Academy of Sciences Fuzhou Fujian 350002 China
| | - Ping Huang
- CAS Key Laboratory of Design and Assembly of Functional NanostructuresFujian Key Laboratory of NanomaterialsFujian Institute of Research on the Structure of MatterChinese Academy of Sciences Fuzhou Fujian 350002 China
| | - Zhongliang Gong
- CAS Key Laboratory of Design and Assembly of Functional NanostructuresFujian Key Laboratory of NanomaterialsFujian Institute of Research on the Structure of MatterChinese Academy of Sciences Fuzhou Fujian 350002 China
| | - Jiaojiao Wei
- CAS Key Laboratory of Design and Assembly of Functional NanostructuresFujian Key Laboratory of NanomaterialsFujian Institute of Research on the Structure of MatterChinese Academy of Sciences Fuzhou Fujian 350002 China
| | - Yu Gao
- CAS Key Laboratory of Design and Assembly of Functional NanostructuresFujian Key Laboratory of NanomaterialsFujian Institute of Research on the Structure of MatterChinese Academy of Sciences Fuzhou Fujian 350002 China
| | - Shanyong Zhou
- CAS Key Laboratory of Design and Assembly of Functional NanostructuresFujian Key Laboratory of NanomaterialsFujian Institute of Research on the Structure of MatterChinese Academy of Sciences Fuzhou Fujian 350002 China
| | - Xingjun Li
- CAS Key Laboratory of Design and Assembly of Functional NanostructuresFujian Key Laboratory of NanomaterialsFujian Institute of Research on the Structure of MatterChinese Academy of Sciences Fuzhou Fujian 350002 China
| | - Xueyuan Chen
- CAS Key Laboratory of Design and Assembly of Functional NanostructuresFujian Key Laboratory of NanomaterialsFujian Institute of Research on the Structure of MatterChinese Academy of Sciences Fuzhou Fujian 350002 China
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14
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Gao Y, Li R, Zheng W, Shang X, Wei J, Zhang M, Xu J, You W, Chen Z, Chen X. Broadband NIR photostimulated luminescence nanoprobes based on CaS:Eu 2+,Sm 3+ nanocrystals. Chem Sci 2019; 10:5452-5460. [PMID: 31293727 PMCID: PMC6552487 DOI: 10.1039/c9sc01321k] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Accepted: 05/01/2019] [Indexed: 12/11/2022] Open
Abstract
Near-infrared (NIR) photostimulated luminescence (PSL) nanocrystals (NCs) have recently evoked considerable interest in the field of biomedicine, but are currently limited by the controlled synthesis of efficient PSL NCs. Herein, we report for the first time the controlled synthesis of CaS:Eu2+,Sm3+ NIR PSL NCs through a high-temperature co-precipitation method. The role of Sm3+ co-doping and the effect of thermal annealing on the optical properties of the NCs as well as the charging and discharging processes, the trap depth distribution, and the underlying PSL mechanism are comprehensively surveyed by means of photoluminescence, persistent luminescence, thermoluminescence, and PSL spectroscopies. The as-prepared NCs exhibit intense PSL of Eu2+ at 650 nm with a fast response to stimulation in a broad NIR region from 800 nm to 1600 nm, a duration time longer than 2 h, and an extremely low power density threshold down to 10 mW cm-2 at 980 nm. Furthermore, by taking advantage of the intense NIR PSL, we demonstrate the application of CaS:Eu2+,Sm3+ NCs as sensitive luminescent nanoprobes for biotin receptor-targeted cancer cell imaging. These results reveal the great promise of CaS:Eu2+,Sm3+ nanoprobes for autofluorescence-free bioimaging, and also lay the foundation for future design of efficient NIR PSL nanoprobes towards versatile bioapplications.
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Affiliation(s)
- Yu Gao
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures , Fujian Key Laboratory of Nanomaterials , Fujian Institute of Research on the Structure of Matter , Chinese Academy of Sciences , Fuzhou , Fujian 350002 , China . ; ; ; Tel: +86 591 63179421
- School of Physical Science and Technology , ShanghaiTech University , Shanghai 201210 , China
- University of Chinese Academy of Sciences , Beijing 100049 , China
- State Key Laboratory of High Performance Ceramic and Superfine Microstructures , Shanghai Institute of Ceramics , Chinese Academy of Sciences , Shanghai 200050 , China
| | - Renfu Li
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures , Fujian Key Laboratory of Nanomaterials , Fujian Institute of Research on the Structure of Matter , Chinese Academy of Sciences , Fuzhou , Fujian 350002 , China . ; ; ; Tel: +86 591 63179421
| | - Wei Zheng
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures , Fujian Key Laboratory of Nanomaterials , Fujian Institute of Research on the Structure of Matter , Chinese Academy of Sciences , Fuzhou , Fujian 350002 , China . ; ; ; Tel: +86 591 63179421
- University of Chinese Academy of Sciences , Beijing 100049 , China
| | - Xiaoying Shang
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures , Fujian Key Laboratory of Nanomaterials , Fujian Institute of Research on the Structure of Matter , Chinese Academy of Sciences , Fuzhou , Fujian 350002 , China . ; ; ; Tel: +86 591 63179421
| | - Jiaojiao Wei
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures , Fujian Key Laboratory of Nanomaterials , Fujian Institute of Research on the Structure of Matter , Chinese Academy of Sciences , Fuzhou , Fujian 350002 , China . ; ; ; Tel: +86 591 63179421
| | - Meiran Zhang
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures , Fujian Key Laboratory of Nanomaterials , Fujian Institute of Research on the Structure of Matter , Chinese Academy of Sciences , Fuzhou , Fujian 350002 , China . ; ; ; Tel: +86 591 63179421
| | - Jin Xu
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures , Fujian Key Laboratory of Nanomaterials , Fujian Institute of Research on the Structure of Matter , Chinese Academy of Sciences , Fuzhou , Fujian 350002 , China . ; ; ; Tel: +86 591 63179421
| | - Wenwu You
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures , Fujian Key Laboratory of Nanomaterials , Fujian Institute of Research on the Structure of Matter , Chinese Academy of Sciences , Fuzhou , Fujian 350002 , China . ; ; ; Tel: +86 591 63179421
| | - Zhuo Chen
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures , Fujian Key Laboratory of Nanomaterials , Fujian Institute of Research on the Structure of Matter , Chinese Academy of Sciences , Fuzhou , Fujian 350002 , China . ; ; ; Tel: +86 591 63179421
- University of Chinese Academy of Sciences , Beijing 100049 , China
| | - Xueyuan Chen
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures , Fujian Key Laboratory of Nanomaterials , Fujian Institute of Research on the Structure of Matter , Chinese Academy of Sciences , Fuzhou , Fujian 350002 , China . ; ; ; Tel: +86 591 63179421
- School of Physical Science and Technology , ShanghaiTech University , Shanghai 201210 , China
- University of Chinese Academy of Sciences , Beijing 100049 , China
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15
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A New Class of Blue‐LED‐Excitable NIR‐II Luminescent Nanoprobes Based on Lanthanide‐Doped CaS Nanoparticles. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201905040] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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16
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h-CaS and h-CaSe nanosheets in CaX (X = O, S, Se and Te) series: promising thermoelectric materials under DFT investigation. APPLIED NANOSCIENCE 2019. [DOI: 10.1007/s13204-019-00997-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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17
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Song Z, Zhao J, Liu Q. Luminescent perovskites: recent advances in theory and experiments. Inorg Chem Front 2019. [DOI: 10.1039/c9qi00777f] [Citation(s) in RCA: 131] [Impact Index Per Article: 26.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
This review summarizes previous research on luminescent perovskites, including oxides and halides, with different structural dimensionality. The relationship between the crystal structure, electronic structure and properties is discussed in detail.
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Affiliation(s)
- Zhen Song
- Beijing Key Laboratory for New Energy Materials and Technologies
- School of Materials Science and Engineering
- University of Science and Technology Beijing
- Beijing 100083
- China
| | - Jing Zhao
- Beijing Key Laboratory for New Energy Materials and Technologies
- School of Materials Science and Engineering
- University of Science and Technology Beijing
- Beijing 100083
- China
| | - Quanlin Liu
- Beijing Key Laboratory for New Energy Materials and Technologies
- School of Materials Science and Engineering
- University of Science and Technology Beijing
- Beijing 100083
- China
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18
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Elisha R. The curious case of Patient K. Med J Aust 2018; 209:501-502. [PMID: 30521445 DOI: 10.5694/mja18.00962] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Accepted: 10/09/2018] [Indexed: 11/17/2022]
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19
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Khattab TA, Rehan M, Hamdy Y, Shaheen TI. Facile Development of Photoluminescent Textile Fabric via Spray Coating of Eu(II)-Doped Strontium Aluminate. Ind Eng Chem Res 2018. [DOI: 10.1021/acs.iecr.8b01594] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Tawfik A. Khattab
- Textile Industries Research Division, National Research Centre, 33 El-Behouth Street, Dokki, Giza 12622, Egypt
| | - Mohamed Rehan
- Textile Industries Research Division, National Research Centre, 33 El-Behouth Street, Dokki, Giza 12622, Egypt
| | - Yousry Hamdy
- Spectroscopy Department, National Research Centre, 33 El-Behouth Street, Dokki, Giza 12622, Egypt
| | - Tharwat I. Shaheen
- Textile Industries Research Division, National Research Centre, 33 El-Behouth Street, Dokki, Giza 12622, Egypt
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20
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Effect of Fabric Integration on the Physical and Optical Performance of Electroluminescent Fibers for Lighted Textile Applications. FIBERS 2018. [DOI: 10.3390/fib6030050] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The advent of electroluminescent (EL) fibers, which emit light in response to an applied electric field, has opened the door for fabric-integrated light emission and displays in textiles. However, there have been few technical publications over the past few years about the performance of these light emitting fibers inside functional fabrics. Thus, there is limited information on the effect of integration on the physical and optical performance of such devices. In this work, alternating current powder-based EL (ACPEL) fibers were evaluated under a range of operating conditions both inside and outside of a knit matrix to understand how the EL fiber device performance changed inside a functional fabric. The device efficiency, adjustable brightness, and mechanical properties of these fibers are presented. The effects of fabric integration on the light-emitting fibers as well as the supporting knit fabric are discussed as they relate to the practical applications of this technology.
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21
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Solid-state fluorescence organic materials as a tool for spectral modification of ZnS-based screen-printed thick layer electroluminescence devices. CHEMICAL PAPERS 2018. [DOI: 10.1007/s11696-018-0404-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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22
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Investigations on structural and optical properties of starch capped ZnS nanoparticles synthesized by microwave irradiation method. Chem Phys Lett 2018. [DOI: 10.1016/j.cplett.2018.04.010] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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23
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Smart textile framework: Photochromic and fluorescent cellulosic fabric printed by strontium aluminate pigment. Carbohydr Polym 2018; 195:143-152. [PMID: 29804962 DOI: 10.1016/j.carbpol.2018.04.084] [Citation(s) in RCA: 69] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2017] [Revised: 04/15/2018] [Accepted: 04/21/2018] [Indexed: 02/02/2023]
Abstract
Smart clothing can be defined as textiles that respond to a certain stimulus accompanied by a change in their properties. A specific class herein is the photochromic and fluorescent textiles that change color with light. A photochromic and fluorescent cotton fabric based on pigment printing is obtained. Such fabric is prepared by aqueous-based pigment-binder printing formulation containing inorganic pigment phosphor characterized by good photo- and thermal stability. It exhibits optimal excitation wavelength (365 nm) results in color and fluorescence change of the fabric surface. To prepare the transparent pigment-binder composite film, the phosphor pigment must be well-dispersed via physical immobilization without their aggregation. The pigment-binder paste is applied successfully onto cotton fabric using screen printing technique followed by thermal fixation. After screen-printing, a homogenous photochromic film is assembled on a cotton substrate surface, which represents substantial greenish-yellow color development as indicated by CIE Lab color space measurements under ultraviolet light, even at a pigment concentration of 0.08 wt% of the printing paste. The photochromic cotton fabric exhibit three excitation peaks at 272, 325 and 365 nm and three emission peaks at 418, 495 and 520 nm. The fluorescent optical microscope, scanning electron microscope, elemental mapping, energy dispersive X-ray spectroscopy, fluorescence emission and UV/Vis absorption spectroscopic data of the printed cotton fabric are described. The printed fabric showed a reversible and rapid photochromic response during ultra-violet excitation without fatigue. The fastness properties including washing, crocking, perspiration, sublimation/heat, and light are described.
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24
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Huang B, Peng D, Pan C. "Energy Relay Center" for doped mechanoluminescence materials: a case study on Cu-doped and Mn-doped CaZnOS. Phys Chem Chem Phys 2018; 19:1190-1208. [PMID: 27942643 DOI: 10.1039/c6cp07472c] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
We unraveled the mechanisms of transition metal-doped mechanoluminescent materials through a case study of CaZnOS. We found that the native point defect levels in Cu or Mn-doped CaZnOS system acted as energy relay centers for luminescence energy transfer. In combination with native point defect levels, discussed in a previous study [Phys. Chem. Chem. Phys., 2016, 18, 25946], we found that phosphor luminescence belongs to two different mechanisms. For Cu-doping, it occurs by the path via the conduction band minimum to the Cu-t2g level of the 3d orbital localized in the band gap. The hole-drifting effect was found to support the reported red-shifting of the emission. Both reversible and irreversible mechanical quenching were attributed to the spatially separated electrons recombining with the hole localized on the Cu-t2g level within the gap at levels below or above respectively. For Mn-doping, this occurs by a collaborative luminescence assisted by native point defects, and the excited states of Mn2+ overlap with the conduction band edge. The coexistence of MnZn and MnCa was confirmed, but was relatively low in MnCa. The concentration quenching effect, as well as the red-shift of absorption, shows a strong correlation with native point defect levels and the relative position of the 4T1(4G) state for both MnZn and MnCa. Further simplified approximations were used for modeling such concentration quenching effects.
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Affiliation(s)
- Bolong Huang
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, China.
| | - Dengfeng Peng
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 100083, P. R. China.
| | - Caofeng Pan
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 100083, P. R. China.
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25
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Lee SP, Chan TS, Dutta S, Chen TM. Novel Eu2+-activated thiogallate phosphors for white LED applications: structural and spectroscopic analysis. RSC Adv 2018; 8:11725-11730. [PMID: 35542794 PMCID: PMC9079137 DOI: 10.1039/c8ra01113c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2018] [Accepted: 03/19/2018] [Indexed: 12/02/2022] Open
Abstract
Novel Eu2+-activated BaGa2SiS6 and Ba2Ga8SiS16 thiogallate phosphors were prepared by solid-state reaction route. The BaGa2SiS6:Eu2+ phosphor generated a green emission upon excitation at 405 nm, whereas the Ba2Ga8SiS16:xEu2+ phosphor could be tuned from cyan to green range with increasing Eu2+ concentration upon excitation at 365 nm. Additionally, the thermal luminescence properties of the thiogallate phosphors were investigated in the temperature range of 25 to 250 °C. A warm-white LED is fabricated using the combination of a 405 nm blue InGaN-based LED chip with the green-emitting BaGa2SiS6:0.01Eu2+ phosphor, and red-emitting Sr2Si5N8:Eu2+ commercial phosphor with the CRI value of ∼88 and the CCT of 4213 K. BaGa2SiS6:Eu2+ (a) emits a green light upon excitation at 405 nm, whereas Ba2Ga8SiS16:xEu2+ (b) can be tuned to emit cyan to green with increasing Eu2+ content when excited at 365 nm.![]()
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Affiliation(s)
- Szu-Ping Lee
- Phosphors Research Laboratory
- Department of Applied Chemistry
- National Chiao Tung University
- Hsinchu 30010
- Taiwan
| | - Ting-Shan Chan
- National Synchrotron Radiation Research Center
- Hsinchu 30076
- Taiwan
| | - Somrita Dutta
- Phosphors Research Laboratory
- Department of Applied Chemistry
- National Chiao Tung University
- Hsinchu 30010
- Taiwan
| | - Teng-Ming Chen
- Phosphors Research Laboratory
- Department of Applied Chemistry
- National Chiao Tung University
- Hsinchu 30010
- Taiwan
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26
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Wang J, Ma Q, Wang Y, Shen H, Yuan Q. Recent progress in biomedical applications of persistent luminescence nanoparticles. NANOSCALE 2017; 9:6204-6218. [PMID: 28466913 DOI: 10.1039/c7nr01488k] [Citation(s) in RCA: 94] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Persistent luminescence nanoparticles (PLNPs) are an emerging group of promising luminescent materials that can remain luminescent after the excitation ceases. In the past decade, PLNPs with intriguing optical properties have been developed and their applications in biomedicine have been widely studied. Due to the ultra-long decay time of persistent luminescence, autofluorescence interference in biosensing and bioimaging can be efficiently eliminated. Moreover, PLNPs can remain luminescent for hours, making them valuable in bio-tracing. Also, persistent luminescence imaging can guide cancer therapy with a high signal-to-noise ratio (SNR) and superior sensitivity. Briefly, PLNPs are demonstrated to be a newly-emerging class of functional materials with unprecedented advantages in biomedicine. In this review, we summarized recent advances in the preparation of PLNPs and the applications of PLNPs in biosensing, bioimaging and cancer therapy.
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Affiliation(s)
- Jie Wang
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, People's Republic of China.
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27
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Functionalisation of Colloidal Transition Metal Sulphides Nanocrystals: A Fascinating and Challenging Playground for the Chemist. CRYSTALS 2017. [DOI: 10.3390/cryst7040110] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Abstract
Phosphorescence is a phenomenon of delayed luminescence that corresponds to the radiative decay of the molecular triplet state. As a general property of molecules, phosphorescence represents a cornerstone problem of chemical physics due to the spin prohibition of the underlying triplet-singlet emission and because its analysis embraces a deep knowledge of electronic molecular structure. Phosphorescence is the simplest physical process which provides an example of spin-forbidden transformation with a characteristic spin selectivity and magnetic field dependence, being the model also for more complicated chemical reactions and for spin catalysis applications. The bridging of the spin prohibition in phosphorescence is commonly analyzed by perturbation theory, which considers the intensity borrowing from spin-allowed electronic transitions. In this review, we highlight the basic theoretical principles and computational aspects for the estimation of various phosphorescence parameters, like intensity, radiative rate constant, lifetime, polarization, zero-field splitting, and spin sublevel population. Qualitative aspects of the phosphorescence phenomenon are discussed in terms of concepts like structure-activity relationships, donor-acceptor interactions, vibronic activity, and the role of spin-orbit coupling under charge-transfer perturbations. We illustrate the theory and principles of computational phosphorescence by highlighting studies of classical examples like molecular nitrogen and oxygen, benzene, naphthalene and their azaderivatives, porphyrins, as well as by reviewing current research on systems like electrophosphorescent transition metal complexes, nucleobases, and amino acids. We furthermore discuss modern studies of phosphorescence that cover topics of applied relevance, like the design of novel photofunctional materials for organic light-emitting diodes (OLEDs), photovoltaic cells, chemical sensors, and bioimaging.
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Affiliation(s)
- Gleb Baryshnikov
- Division of Theoretical Chemistry and Biology, Royal Institute of Technology , SE-106 91 Stockholm, Sweden.,Bohdan Khmelnytsky National University , 18031 Cherkasy, Ukraine
| | - Boris Minaev
- Division of Theoretical Chemistry and Biology, Royal Institute of Technology , SE-106 91 Stockholm, Sweden.,Bohdan Khmelnytsky National University , 18031 Cherkasy, Ukraine
| | - Hans Ågren
- Division of Theoretical Chemistry and Biology, Royal Institute of Technology , SE-106 91 Stockholm, Sweden.,Institute of Nanotechnology, Spectroscopy and Quantum Chemistry, Siberian Federal University , Svobodny pr. 79, 660041 Krasnoyarsk, Russia
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29
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Solarz P, Komar J, Głowacki M, Berkowski M, Ryba-Romanowski W. Spectroscopic characterization of SrB4O7:Tm2+, a potential laser material and optical temperature sensor. RSC Adv 2017. [DOI: 10.1039/c7ra01282a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The values for the thermal sensitivity parameter for the SrB4O7:Tm2+ in the 300–330 K region exceed 3.9% per K with a peak value of 6.30% per K at 320 K.
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Affiliation(s)
- Piotr Solarz
- Institute of Low Temperature and Structure Research
- Polish Academy of Sciences
- 50-422 Wrocław
- Poland
| | - Jarosław Komar
- Institute of Low Temperature and Structure Research
- Polish Academy of Sciences
- 50-422 Wrocław
- Poland
| | - Michał Głowacki
- Institute of Physics
- Polish Academy of Sciences
- 02-668 Warsaw
- Poland
| | - Marek Berkowski
- Institute of Physics
- Polish Academy of Sciences
- 02-668 Warsaw
- Poland
| | - Witold Ryba-Romanowski
- Institute of Low Temperature and Structure Research
- Polish Academy of Sciences
- 50-422 Wrocław
- Poland
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30
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Huang B, Sun M. Energy conversion modeling of the intrinsic persistent luminescence of solids via energy transfer paths between transition levels. Phys Chem Chem Phys 2017; 19:9457-9469. [DOI: 10.1039/c7cp01056g] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The energy transfer mechanism for persistent luminescence. The thermodynamic transition levels (TTLs) and single-particle levels (SPLs) are correlated with phonons.
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Affiliation(s)
- Bolong Huang
- Department of Applied Biology and Chemical Technology
- The Hong Kong Polytechnic University
- Kowloon
- China
| | - Mingzi Sun
- Department of Applied Biology and Chemical Technology
- The Hong Kong Polytechnic University
- Kowloon
- China
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31
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Murray AJ, Roussel J, Rolley J, Woodhall F, Mikheenko IP, Johnson DB, Gomez-Bolivar J, Merroun M, Macaskie LE. Biosynthesis of zinc sulfide quantum dots using waste off-gas from a metal bioremediation process. RSC Adv 2017. [DOI: 10.1039/c6ra17236a] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Waste H2S biogas from a mine-water remediation bioprocess is used to make zinc sulfide quantum dots which are identical to ZnS QDs made by chemical methods.
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Affiliation(s)
- Angela J. Murray
- Unit of Functional Bionanomaterials
- School of Biosciences
- University of Birmingham
- Birmingham B15 2TT
- UK
| | - Jimmy Roussel
- Unit of Functional Bionanomaterials
- School of Biosciences
- University of Birmingham
- Birmingham B15 2TT
- UK
| | - John Rolley
- Unit of Functional Bionanomaterials
- School of Biosciences
- University of Birmingham
- Birmingham B15 2TT
- UK
| | - Frankie Woodhall
- Unit of Functional Bionanomaterials
- School of Biosciences
- University of Birmingham
- Birmingham B15 2TT
- UK
| | - Iryna P. Mikheenko
- Unit of Functional Bionanomaterials
- School of Biosciences
- University of Birmingham
- Birmingham B15 2TT
- UK
| | | | - Jaime Gomez-Bolivar
- Department of Microbiology
- Faculty of Sciences
- University of Granada
- Campus Fuentenueva
- Granada
| | - Mohamed L. Merroun
- Department of Microbiology
- Faculty of Sciences
- University of Granada
- Campus Fuentenueva
- Granada
| | - Lynne E. Macaskie
- Unit of Functional Bionanomaterials
- School of Biosciences
- University of Birmingham
- Birmingham B15 2TT
- UK
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32
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Vorokh AS, Kozhevnikova NS, Uritskaya AA, Bamburov VG. Nanostructured ZnS with random close-packed structure: Synthesis, formation rate, and crystal structure study. DOKLADY PHYSICAL CHEMISTRY 2016. [DOI: 10.1134/s0012501616100031] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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33
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Kulesza D, Bolek P, Bos AJ, Zych E. Lu2O3-based storage phosphors. An (in)harmonious family. Coord Chem Rev 2016. [DOI: 10.1016/j.ccr.2016.05.006] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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34
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Wei XY, Wang X, Kuang SY, Su L, Li HY, Wang Y, Pan C, Wang ZL, Zhu G. Dynamic Triboelectrification-Induced Electroluminescence and its Use in Visualized Sensing. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2016; 28:6656-6664. [PMID: 27213998 DOI: 10.1002/adma.201600604] [Citation(s) in RCA: 60] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2016] [Revised: 03/18/2016] [Indexed: 06/05/2023]
Abstract
Triboelectrification-induced electroluminescence converts dynamic motion into light emission. Tribocharges resulting from the relative mechanical interactions between two dissimilar materials can abruptly and significantly alter the surrounding electric potential, exciting the electroluminescence of phosphor along the motion trajectory. The position, trajectory, and contour profile of a moving object can be visualized in high resolution, demonstrating applications in sensing.
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Affiliation(s)
- Xiao Yan Wei
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, National Center for Nanoscience and Technology (NCNST), Beijing, 100083, P. R. China
| | - Xiandi Wang
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, National Center for Nanoscience and Technology (NCNST), Beijing, 100083, P. R. China
| | - Shuang Yang Kuang
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, National Center for Nanoscience and Technology (NCNST), Beijing, 100083, P. R. China
| | - Li Su
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, National Center for Nanoscience and Technology (NCNST), Beijing, 100083, P. R. China
| | - Hua Yang Li
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, National Center for Nanoscience and Technology (NCNST), Beijing, 100083, P. R. China
| | - Ying Wang
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, National Center for Nanoscience and Technology (NCNST), Beijing, 100083, P. R. China
| | - Caofeng Pan
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, National Center for Nanoscience and Technology (NCNST), Beijing, 100083, P. R. China
| | - Zhong Lin Wang
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, National Center for Nanoscience and Technology (NCNST), Beijing, 100083, P. R. China
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Guang Zhu
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, National Center for Nanoscience and Technology (NCNST), Beijing, 100083, P. R. China
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35
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Huang B. Energy harvesting and conversion mechanisms for intrinsic upconverted mechano-persistent luminescence in CaZnOS. Phys Chem Chem Phys 2016; 18:25946-25974. [DOI: 10.1039/c6cp04706h] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Vacancy defects acting as native activators, e.g. V2+ZnO and V2+CaZnOS, function as energy conversion centers to transfer energy into photons.
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Affiliation(s)
- Bolong Huang
- Department of Applied Biology and Chemical Technology
- The Hong Kong Polytechnic University
- Kowloon
- China
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36
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Huang B. Unraveling energy conversion modeling in the intrinsic persistent upconverted luminescence of solids: a study of native point defects in antiferromagnetic Er2O3. Phys Chem Chem Phys 2016; 18:13564-82. [DOI: 10.1039/c6cp01747a] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Lattice defects like anion Frenkel pair (a-Fr) works on transporting the O defect. For bio-window, it increases the electron transitions between high-coordinated O-defect and metastable a-Fr, a core–shell works to quench the low-coordinated O defect to reduce green band luminescences.
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Affiliation(s)
- Bolong Huang
- Department of Applied Biology and Chemical Technology
- The Hong Kong Polytechnic University
- Hong Kong SAR
- China
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37
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Guo SP, Chi Y, Zou JP, Xue HG. Crystal and electronic structures, and photoluminescence and photocatalytic properties of α-EuZrS3. NEW J CHEM 2016. [DOI: 10.1039/c6nj02106a] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Novel crystalline α-EuZrS3 shows Eu2+ photoluminescence and is photocatalytically active towards the decomposition of methylene blue under visible light or simulated sunlight irradiation.
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Affiliation(s)
- Sheng-Ping Guo
- College of Chemistry & Chemical Engineering
- Yangzhou University
- Yangzhou
- P. R. China
| | - Yang Chi
- College of Chemistry & Chemical Engineering
- Yangzhou University
- Yangzhou
- P. R. China
| | - Jian-Ping Zou
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle
- Nanchang Hangkong University
- Nanchang
- P. R. China
| | - Huai-Guo Xue
- College of Chemistry & Chemical Engineering
- Yangzhou University
- Yangzhou
- P. R. China
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38
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Huang B. Native Point Defects in CaS: Focus on Intrinsic Defects and Rare Earth Ion Dopant Levels for Up-converted Persistent Luminescence. Inorg Chem 2015; 54:11423-40. [DOI: 10.1021/acs.inorgchem.5b02061] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Bolong Huang
- Department of Physics and Materials Science, City University of Hong Kong, Kowloon, Hong Kong SAR, China
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39
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Jarý V, Havlák L, Bárta J, Buryi M, Mihóková E, Rejman M, Laguta V, Nikl M. Optical, Structural and Paramagnetic Properties of Eu-Doped Ternary Sulfides ALnS₂ (A = Na, K, Rb; Ln = La, Gd, Lu, Y). MATERIALS (BASEL, SWITZERLAND) 2015; 8:6978-6998. [PMID: 28793612 PMCID: PMC5455392 DOI: 10.3390/ma8105348] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/07/2015] [Revised: 09/19/2015] [Accepted: 09/28/2015] [Indexed: 11/22/2022]
Abstract
Eu-doped ternary sulfides of general formula ALnS₂ (A = Na, K, Rb; Ln = La, Gd, Lu, Y) are presented as a novel interesting material family which may find usage as X-ray phosphors or solid state white light emitting diode (LED) lighting. Samples were synthesized in the form of transparent crystalline hexagonal platelets by chemical reaction under the flow of hydrogen sulfide. Their physical properties were investigated by means of X-ray diffraction, time-resolved photoluminescence spectroscopy, electron paramagnetic resonance, and X-ray excited fluorescence. Corresponding characteristics, including absorption, radioluminescence, photoluminescence excitation and emission spectra, and decay kinetics curves, were measured and evaluated in a broad temperature range (8-800 K). Calculations including quantum local crystal field potential and spin-Hamiltonian for a paramagnetic particle in D3d local symmetry and phenomenological model dealing with excited state dynamics were performed to explain the experimentally observed features. Based on the results, an energy diagram of lanthanide energy levels in KLuS₂ is proposed. Color model xy-coordinates are used to compare effects of dopants on the resulting spectrum. The application potential of the mentioned compounds in the field of white LED solid state lighting or X-ray phosphors is thoroughly discussed.
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Affiliation(s)
- Vítězslav Jarý
- Institute of Physics, Academy of Sciences of the Czech Republic, Na Slovance 1999/2, Praha 8 18221, Czech Republic.
| | - Lubomír Havlák
- Institute of Physics, Academy of Sciences of the Czech Republic, Na Slovance 1999/2, Praha 8 18221, Czech Republic.
| | - Jan Bárta
- Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, Brehova 7, Praha 1 11519, Czech Republic.
| | - Maksym Buryi
- Institute of Physics, Academy of Sciences of the Czech Republic, Na Slovance 1999/2, Praha 8 18221, Czech Republic.
| | - Eva Mihóková
- Institute of Physics, Academy of Sciences of the Czech Republic, Na Slovance 1999/2, Praha 8 18221, Czech Republic.
| | - Martin Rejman
- Institute of Physics, Academy of Sciences of the Czech Republic, Na Slovance 1999/2, Praha 8 18221, Czech Republic.
| | - Valentin Laguta
- Institute of Physics, Academy of Sciences of the Czech Republic, Na Slovance 1999/2, Praha 8 18221, Czech Republic.
| | - Martin Nikl
- Institute of Physics, Academy of Sciences of the Czech Republic, Na Slovance 1999/2, Praha 8 18221, Czech Republic.
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40
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Whitham PJ, Knowles KE, Reid PJ, Gamelin DR. Photoluminescence Blinking and Reversible Electron Trapping in Copper-Doped CdSe Nanocrystals. NANO LETTERS 2015; 15:4045-51. [PMID: 26007328 DOI: 10.1021/acs.nanolett.5b01046] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Single-particle photoluminescence blinking is observed in the copper-centered deep-trap luminescence of copper-doped CdSe (Cu(+):CdSe) nanocrystals. Blinking dynamics for Cu(+):CdSe and undoped CdSe nanocrystals are analyzed to identify the effect of Cu(+), which selectively traps photogenerated holes. Analysis of the blinking data reveals that the Cu(+):CdSe and CdSe nanocrystal "off"-state dynamics are statistically identical, but the Cu(+):CdSe nanocrystal "on" state is shorter lived. Additionally, a new and pronounced temperature-dependent delayed luminescence is observed in the Cu(+):CdSe nanocrystals that persists long beyond the radiative lifetime of the luminescent excited state. This delayed luminescence is analogous to the well-known donor-acceptor pair luminescence of bulk copper-doped phosphors and is interpreted as revealing metastable charge-separated excited states formed by reversible electron trapping at the nanocrystal surfaces. A mechanistic link between this delayed luminescence and the luminescence blinking is proposed. Collectively, these data suggest that electron (rather than hole) trapping/detrapping is responsible for photoluminescence intermittency in these nanocrystals.
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Affiliation(s)
- Patrick J Whitham
- Department of Chemistry, University of Washington, Seattle, Washington 98195-1700, United States
| | - Kathryn E Knowles
- Department of Chemistry, University of Washington, Seattle, Washington 98195-1700, United States
| | - Philip J Reid
- Department of Chemistry, University of Washington, Seattle, Washington 98195-1700, United States
| | - Daniel R Gamelin
- Department of Chemistry, University of Washington, Seattle, Washington 98195-1700, United States
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41
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Opasanont B, Van KT, Kuba AG, Choudhury KR, Baxter JB. Adherent and Conformal Zn(S,O,OH) Thin Films by Rapid Chemical Bath Deposition with Hexamethylenetetramine Additive. ACS APPLIED MATERIALS & INTERFACES 2015; 7:11516-11525. [PMID: 25951891 DOI: 10.1021/acsami.5b02482] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
ZnS is a wide band gap semiconductor whose many applications, such as photovoltaic buffer layers, require uniform and continuous films down to several nanometers thick. Chemical bath deposition (CBD) is a simple, low-cost, and scalable technique to deposit such inorganic films. However, previous attempts at CBD of ZnS have often resulted in nodular noncontinuous films, slow growth rates at low pH, and high ratio of oxygen impurities at high pH. In this work, ZnS thin films were grown by adding hexamethylenetetramine (HMTA) to a conventional recipe that uses zinc sulfate, nitrilotriacetic acid trisodium salt, and thioacetamide. Dynamic bath characterization showed that HMTA helps the bath to maintain near-neutral pH and also acts as a catalyst, which leads to fast nucleation and deposition rates, continuous films, and less oxygen impurities in the films. Films deposited on glass from HMTA-containing bath were uniform, continuous, and 90 nm thick after 1 h, as opposed to films grown without HMTA that were ∼3 times thinner and more nodular. On Cu2(Zn,Sn)Se4, films grown with HMTA were continuous within 10 min. The films have comparatively few oxygen impurities, with S/(S+O) atomic ratio of 88%, and high optical transmission of 98% at 360 nm. The Zn(S,O,OH) films exhibit excellent adhesion to glass and high resistivity, which make them ideal nucleation layers for other metal sulfides. Their promise as a nucleation layer was demonstrated with the deposition of thin, continuous Sb2S3 overlayers. This novel HMTA chemistry enables rapid deposition of Zn(S,O,OH) thin films to serve as a nucleation layer, a photovoltaic buffer layer, or an extremely thin continuous coating for thin film applications. HMTA may also be applied in a similar manner for solution deposition of other metal chalcogenide and oxide thin films with superior properties.
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Affiliation(s)
- Borirak Opasanont
- †Chemical and Biological Engineering Department, Drexel University, Philadelphia, Pennsylvania 19104, United States
| | - Khoa T Van
- †Chemical and Biological Engineering Department, Drexel University, Philadelphia, Pennsylvania 19104, United States
| | - Austin G Kuba
- †Chemical and Biological Engineering Department, Drexel University, Philadelphia, Pennsylvania 19104, United States
| | - Kaushik Roy Choudhury
- ‡Central Research and Development, DuPont Experimental Station, Wilmington, Delaware 19803, United States
| | - Jason B Baxter
- †Chemical and Biological Engineering Department, Drexel University, Philadelphia, Pennsylvania 19104, United States
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42
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Lee SH, Kim HJ, Jeong YK, Kim KB, Kang JG. Highly Luminescent Multicomponent Green Phosphor for a White Light-emitting Diode. B KOREAN CHEM SOC 2015. [DOI: 10.1002/bkcs.10322] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Sun-Hee Lee
- Department of Chemistry; Chungnam National University; Daejeon 305-764 Republic of Korea
- Kumho Electric Inc.; Gyeonggi-Do 449-883 Republic of Korea
| | - Hyun-Joon Kim
- Department of Chemistry; Chungnam National University; Daejeon 305-764 Republic of Korea
| | - Yong-Kwang Jeong
- Department of Chemistry; Chungnam National University; Daejeon 305-764 Republic of Korea
| | - Kwang-Bok Kim
- Department of Chemistry; Chungnam National University; Daejeon 305-764 Republic of Korea
- Kumho Electric Inc.; Gyeonggi-Do 449-883 Republic of Korea
| | - Jun-Gill Kang
- Department of Chemistry; Chungnam National University; Daejeon 305-764 Republic of Korea
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43
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44
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Moreno MS, Urones-Garrote E, Otero-Díaz LC. Electronic structure of MgS and MgYb2S4: Electron Energy-Loss Spectroscopy and self-consistent multiple scattering calculations. Micron 2015; 73:9-14. [PMID: 25846304 DOI: 10.1016/j.micron.2015.03.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2015] [Revised: 03/13/2015] [Accepted: 03/13/2015] [Indexed: 11/24/2022]
Abstract
The electronic structure of MgS and MgYb2S4 have been studied using the fine structure of the Mg-K, S-K, Mg-L2,3, S-L2,3 and Yb-N5 edges measured by electron energy-loss spectroscopy (EELS). Our experimental results are compared with real-space full multiple scattering calculations as incorporated in the FEFF9.6 code. All edges are very well reproduced. Total and partial densities of states have been calculated. The calculated densities of states of Mg and S are similar in both compounds. The energy distribution of these states suggests a covalent nature for both materials. For MgYb2S4 a band gap smaller than for MgS is predicted. In this compound the top of the valence band and the bottom of the conduction band are dominated by Yb states.
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Affiliation(s)
- M S Moreno
- Centro Atómico Bariloche, 8400, San Carlos de Bariloche, Argentina.
| | - Esteban Urones-Garrote
- Centro Nacional de Microscopía Electrónica, Universidad Complutense, Madrid, E-28040, Spain
| | - L C Otero-Díaz
- Departamento de Química Inorgánica, Facultad de Ciencias Químicas, Universidad Complutense, Madrid, E-28040, Spain
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45
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Lee SP, Chan TS, Chen TM. Novel reddish-orange-emitting BaLa2Si2S8:Eu(2+) thiosilicate phosphor for LED lighting. ACS APPLIED MATERIALS & INTERFACES 2015; 7:40-44. [PMID: 25536279 DOI: 10.1021/am505613s] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A novel reddish-orange-emitting BaLa2Si2S8:Eu(2+) thiosilicate was prepared in a sealed fused silica ampule and its crystal structure was refined using Rietveld methods. The BaLa2Si2S8:Eu(2+) phosphor is excitable over a broad range from UV to blue (350-450 nm) and generated a reddish-orange broadband emission peaking at 645 nm with a quantum efficiency of ∼24%. The thermal luminescence quenching of BaLa2Si2S8:Eu(2+) was investigated over the range 25 to 150 °C. This phosphor was utilized to incorporate with two commercially available phosphors, blue BaMgAl10O17:Eu(2+) and green (Ba,Sr)2SiO4:Eu(2+), and a near-UV LED chip (405 nm), a white light with Ra of ∼94 was obtained.
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Affiliation(s)
- Szu-Ping Lee
- Phosphors Research Laboratory, Department of Applied Chemistry and Institute of Molecular Science, National Chiao Tung University , Hsinchu 30010, Taiwan
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46
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Joos JJ, Poelman D, Smet PF. Energy level modeling of lanthanide materials: review and uncertainty analysis. Phys Chem Chem Phys 2015; 17:19058-78. [DOI: 10.1039/c5cp02156a] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Empirical energy level models for describing lanthanide materials are reviewed and situated in a broader theoretical framework. The accuracy of determining experimental quantities through modeling is assessed.
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Affiliation(s)
- Jonas J. Joos
- LumiLab
- Department of Solid State Sciences
- Ghent University
- Ghent
- Belgium
| | - Dirk Poelman
- LumiLab
- Department of Solid State Sciences
- Ghent University
- Ghent
- Belgium
| | - Philippe F. Smet
- LumiLab
- Department of Solid State Sciences
- Ghent University
- Ghent
- Belgium
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47
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Kumar A, Kedawat G, Kumar P, Dwivedi J, Gupta BK. Sunlight-activated Eu2+/Dy3+ doped SrAl2O4 water resistant phosphorescent layer for optical displays and defence applications. NEW J CHEM 2015. [DOI: 10.1039/c4nj02333a] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Demonstration of a high brightness, strong green emitting, water resistant and flexible phosphorescent layer for display and defence applications.
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Affiliation(s)
- Arun Kumar
- CSIR – National Physical Laboratory
- New Delhi
- India
| | - Garima Kedawat
- Department of Physics
- Kalindi College
- University of Delhi
- New Delhi
- India
| | - Pawan Kumar
- CSIR – National Physical Laboratory
- New Delhi
- India
| | - Jaya Dwivedi
- CSIR – National Physical Laboratory
- New Delhi
- India
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48
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Zulkifli Z, Subramanian M, Tsuchiya T, Rosmi MS, Ghosh P, Kalita G, Tanemura M. Highly transparent and conducting C:ZnO thin film for field emission displays. RSC Adv 2014. [DOI: 10.1039/c4ra11837e] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
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49
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Zhao Y, Rabouw FT, van Puffelen T, van Walree CA, Gamelin DR, de Mello Donegá C, Meijerink A. Lanthanide-doped CaS and SrS luminescent nanocrystals: a single-source precursor approach for doping. J Am Chem Soc 2014; 136:16533-43. [PMID: 25368972 DOI: 10.1021/ja5076663] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The incorporation of dopants with optical or magnetic functionalities into colloidal nanocrystals (NCs) has been a longstanding challenge for nanomaterial research. A deeper understanding of the doping kinetics will aid a better control of the doping process. In particular, alkaline-earth sulfides are an important class of host materials for a range of luminescent dopants, including transition-metal and lanthanide ions. Their nanocrystalline analogues have many potential applications. However, the lack of synthetic methodologies hampers their development. Here we introduce a single-source precursor approach that successfully leads to Ce(3+)- and Eu(2+)-doped CaS and SrS luminescent NCs with diameters of ∼10 nm and with luminescent properties similar to those of the bulk analogues. The characteristic absorption and luminescence of Ce(3+) and Eu(2+) depend on the local coordination and are applied to probe dopant ion internalization. We demonstrate that controlling the reactivity of the precursors is crucial for achieving effective doping. By designing the chemical structure of the dopant precursor to vary the reactivity relative to that of the host precursor, the doping efficiency can be controlled. In addition, we have applied a growth doping strategy to further improve internalization of the dopants. Finally, we demonstrate nucleation doping as an alternative method to achieve lanthanide NC doping for dopant and host precursors with strongly different reactivities. The single-source precursor approaches proposed here allow for a flexible design of synthesis strategies and have the potential to be widely applicable to the doping of colloidal chalcogenide NCs with transition-metal and lanthanide dopant ions.
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Affiliation(s)
- Yiming Zhao
- Condensed Matter and Interfaces, Debye Institute for Nanomaterials Science, Utrecht University , Princetonplein 5, 3584 CC Utrecht, The Netherlands
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50
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Rivera-Vázquez D, Santiago-Rodríguez Y, González MA, Castro-Rosario ME. Quantum Confinement Effects in Calcium Sulfide: The Role of Indirect Transitions in the Red Shift of the Band Edge in Semiconductor Nanoparticles. ACTA ACUST UNITED AC 2014. [DOI: 10.1557/opl.2014.891] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
ABSTRACTCalcium sulfide (CaS) nanoparticles are cadmium free fluorescent nanostructures with potential applications in nanomedicine and photovoltaic cells. We report on the synthesis and optical properties of CaS nanoparticles prepared by the reaction of Ca(CH3CO2)2 and DMSO in a microwave. The absorption spectra of CaS prepared from this method consists of a well-defined peak in the UV and a long wavelength tail that extends above 700 nm. Emission bands centered at around 500 nm with a long wavelength tail that extends above 600 nm are observed upon excitation at 405 nm. STM measurements reveal the formation of CaS nanoparticles with an average diameter of (3.2 ± 0.7) nm. The direct and indirect band gaps are estimated to be (0.403 ± 0.003) eV and (4.135 ± 0.006) eV, respectively. Theoretical calculations on small CaS clusters are used to establish the physical properties of calcium sulfide nanoclusters, including the optical absorption spectra. Unique to CaS nanostructures is the absorption of light at wavelengths longer that in the bulk material instead of the blue shift associated with quantum confinement effects in semiconductors. Indeed, the strong absorption bands in the visible region of the spectra of the CaS nanostructures do not have a counterpart in the gas or solid phases. The optical absorption spectra are proposed to have a significant contribution from indirect transitions which are discussed in terms of the dispersion of the phonon frequency.
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