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Li L, Fang S, Yu R, Chen R, Wang H, Gao X, Zha W, Yu X, Jiang L, Zhu D, Xiong Y, Liao YH, Zheng D, Yang WX, Miao J. Fast near-infrared photodetectors from p-type SnSe nanoribbons. NANOTECHNOLOGY 2023; 34:245202. [PMID: 36881863 DOI: 10.1088/1361-6528/acc1eb] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Accepted: 03/07/2023] [Indexed: 06/18/2023]
Abstract
Low-dimensional tin selenide nanoribbons (SnSe NRs) show a wide range of applications in optoelectronics fields such as optical switches, photodetectors, and photovoltaic devices due to the suitable band gap, strong light-matter interaction, and high carrier mobility. However, it is still challenging to grow high-quality SnSe NRs for high-performance photodetectors so far. In this work, we successfully synthesized high-quality p-type SnSe NRs by chemical vapor deposition and then fabricated near-infrared photodetectors. The SnSe NR photodetectors show a high responsivity of 376.71 A W-1, external quantum efficiency of 5.65 × 104%, and detectivity of 8.66 × 1011Jones. In addition, the devices show a fast response time with rise and fall time of up to 43μs and 57μs, respectively. Furthermore, the spatially resolved scanning photocurrent mapping shows very strong photocurrent at the metal-semiconductor contact regions, as well as fast generation-recombination photocurrent signals. This work demonstrated that p-type SnSe NRs are promising material candidates for broad-spectrum and fast-response optoelectronic devices.
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Affiliation(s)
- Long Li
- School of Physics and Optoelectronic Engineering, Yangtze University, Jingzhou 434023, People's Republic of China
| | - Suhui Fang
- School of Physics and Optoelectronic Engineering, Yangtze University, Jingzhou 434023, People's Republic of China
| | - Ranran Yu
- School of Physics and Optoelectronic Engineering, Yangtze University, Jingzhou 434023, People's Republic of China
| | - Ruoling Chen
- School of Physics and Optoelectronic Engineering, Yangtze University, Jingzhou 434023, People's Republic of China
| | - Hailu Wang
- State Key Laboratory of Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, People's Republic of China
- Nantong Academy of Intelligent Sensing, No. 60 Chongzhou Road, Nantong 226009, People's Republic of China
| | - Xiaofeng Gao
- School of Physics and Optoelectronic Engineering, Yangtze University, Jingzhou 434023, People's Republic of China
| | - Wenjing Zha
- School of Physics and Optoelectronic Engineering, Yangtze University, Jingzhou 434023, People's Republic of China
| | - Xiangxiang Yu
- School of Physics and Optoelectronic Engineering, Yangtze University, Jingzhou 434023, People's Republic of China
| | - Long Jiang
- School of Physics and Optoelectronic Engineering, Yangtze University, Jingzhou 434023, People's Republic of China
| | - Desheng Zhu
- School of Physics and Optoelectronic Engineering, Yangtze University, Jingzhou 434023, People's Republic of China
| | - Yan Xiong
- School of Physics and Optoelectronic Engineering, Yangtze University, Jingzhou 434023, People's Republic of China
| | - Yan-Hua Liao
- School of Mathematics and Physics, Hubei Polytechnic University, Huangshi 435003, People's Republic of China
| | - Dingshan Zheng
- School of Physics and Optoelectronic Engineering, Yangtze University, Jingzhou 434023, People's Republic of China
| | - Wen-Xing Yang
- School of Physics and Optoelectronic Engineering, Yangtze University, Jingzhou 434023, People's Republic of China
| | - Jinshui Miao
- State Key Laboratory of Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, People's Republic of China
- Nantong Academy of Intelligent Sensing, No. 60 Chongzhou Road, Nantong 226009, People's Republic of China
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2
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Fang Y, Lv K, Li Z, Kong N, Wang S, Xu A, Wu Z, Jiang F, Li C, Ozin GA, He L. Solution-Liquid-Solid Growth and Catalytic Applications of Silica Nanorod Arrays. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2020; 7:2000310. [PMID: 32670762 PMCID: PMC7341079 DOI: 10.1002/advs.202000310] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2020] [Revised: 05/04/2020] [Indexed: 05/16/2023]
Abstract
As an analogue to the vapor-liquid-solid process, the solution-liquid-solid (SLS) method offers a mild solution-phase route to colloidal 1D nanostructures with controlled sizes, compositions, and properties. However, direct growth of 1D nanostructure arrays through SLS processes remains in its infancy. Herein, this study shows that SLS processes are also suitable for the growth of nanorod arrays on the substrate. As a proof of concept, seedless growth of silica nanorod arrays on a variety of hydrophilic substrates such as pristine and oxide-modified glass, metal sheets, Si wafers, and biaxially oriented polypropylene film are demonstrated. Also, the silica nanorod arrays can be used as a new platform for the fabrication of catalysts for photothermal CO2 hydrogenation and the reduction of 4-nitrophenol reactions. This work offers some fundamental insight into the SLS growth process and opens a new avenue for the mild preparation of functional 1D nanostructure arrays for various applications.
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Affiliation(s)
- Yaosi Fang
- Institute of Functional Nano & Soft Materials (FUNSOM)Jiangsu Key Laboratory for Carbon‐Based Functional Materials & DevicesSoochow University199 Ren'ai RoadSuzhouJiangsu215123P. R. China
| | - Kangxiao Lv
- Institute of Functional Nano & Soft Materials (FUNSOM)Jiangsu Key Laboratory for Carbon‐Based Functional Materials & DevicesSoochow University199 Ren'ai RoadSuzhouJiangsu215123P. R. China
| | - Zhao Li
- Solar Fuels GroupChemistry DepartmentUniversity of Toronto80 St. George StTorontoOntarioM5S 3H6Canada
| | - Ning Kong
- Institute of Functional Nano & Soft Materials (FUNSOM)Jiangsu Key Laboratory for Carbon‐Based Functional Materials & DevicesSoochow University199 Ren'ai RoadSuzhouJiangsu215123P. R. China
| | - Shenghua Wang
- Institute of Functional Nano & Soft Materials (FUNSOM)Jiangsu Key Laboratory for Carbon‐Based Functional Materials & DevicesSoochow University199 Ren'ai RoadSuzhouJiangsu215123P. R. China
| | - Ao‐Bo Xu
- Department of ChemistryThe University of Western OntarioLondonOntarioN6A 3K7Canada
| | - Zhiyi Wu
- Institute of Functional Nano & Soft Materials (FUNSOM)Jiangsu Key Laboratory for Carbon‐Based Functional Materials & DevicesSoochow University199 Ren'ai RoadSuzhouJiangsu215123P. R. China
| | - Fengluan Jiang
- Institute of Functional Nano & Soft Materials (FUNSOM)Jiangsu Key Laboratory for Carbon‐Based Functional Materials & DevicesSoochow University199 Ren'ai RoadSuzhouJiangsu215123P. R. China
| | - Chaoran Li
- Institute of Functional Nano & Soft Materials (FUNSOM)Jiangsu Key Laboratory for Carbon‐Based Functional Materials & DevicesSoochow University199 Ren'ai RoadSuzhouJiangsu215123P. R. China
| | - Geoffrey A. Ozin
- Solar Fuels GroupChemistry DepartmentUniversity of Toronto80 St. George StTorontoOntarioM5S 3H6Canada
| | - Le He
- Institute of Functional Nano & Soft Materials (FUNSOM)Jiangsu Key Laboratory for Carbon‐Based Functional Materials & DevicesSoochow University199 Ren'ai RoadSuzhouJiangsu215123P. R. China
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Roy A, Singh A, Aravindh SA, Servottam S, Waghmare UV, Rao CNR. Effect of Mn 2+ substitution on the structure, properties and HER activity of cadmium phosphochlorides. RSC Adv 2020; 10:5134-5145. [PMID: 35498300 PMCID: PMC9049510 DOI: 10.1039/c9ra10711h] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Accepted: 01/22/2020] [Indexed: 11/24/2022] Open
Abstract
Cadmium phosphochlorides, Cd4P2Cl3 and Cd7P4Cl6, possess cadmium atoms differently bonded to chlorine and phosphorus ligands. A combined experimental and theoretical study has been carried out to examine the effect of manganese substitution in place of cadmium in these compounds. Experimentally it is found that manganese prefers the Cd7P4Cl6 phase over Cd4P2Cl3. First-principles calculations reveal, stabilization of Cd7P4Cl6 upon Mn-substitution with a significant reduction in the formation energy when Mn2+ is substituted at Cd-sites coordinated octahedrally by Cl-ligands. Substitution of Mn2+ at two different Cd-sites in these compounds not only alters their formation energy differently but also causes a notable change in the electronic structures. In contrast to n-type conductivity in pristine Cd7P4Cl6, Mn2+ substituted Cd7-y Mn y P4Cl6 analogues exhibit p-type conductivity with a remarkable enhancement in the photochemical HER activity and stability of the system. Photochemical properties of pristine and substituted compounds are explained by studying the nature of charge carriers and their dynamics.
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Affiliation(s)
- Anand Roy
- New Chemistry Unit, Sheikh Saqr Laboratory, School of Advance Materials, Theoretical Science Unit, Jawaharlal Nehru Centre for Advanced Scientific Research Jakkur, P. O. 560064 Bangalore India
| | - Anjali Singh
- New Chemistry Unit, Sheikh Saqr Laboratory, School of Advance Materials, Theoretical Science Unit, Jawaharlal Nehru Centre for Advanced Scientific Research Jakkur, P. O. 560064 Bangalore India
| | - S Assa Aravindh
- New Chemistry Unit, Sheikh Saqr Laboratory, School of Advance Materials, Theoretical Science Unit, Jawaharlal Nehru Centre for Advanced Scientific Research Jakkur, P. O. 560064 Bangalore India
| | - Swaraj Servottam
- New Chemistry Unit, Sheikh Saqr Laboratory, School of Advance Materials, Theoretical Science Unit, Jawaharlal Nehru Centre for Advanced Scientific Research Jakkur, P. O. 560064 Bangalore India
| | - Umesh V Waghmare
- New Chemistry Unit, Sheikh Saqr Laboratory, School of Advance Materials, Theoretical Science Unit, Jawaharlal Nehru Centre for Advanced Scientific Research Jakkur, P. O. 560064 Bangalore India
| | - C N R Rao
- New Chemistry Unit, Sheikh Saqr Laboratory, School of Advance Materials, Theoretical Science Unit, Jawaharlal Nehru Centre for Advanced Scientific Research Jakkur, P. O. 560064 Bangalore India
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Jia G, Du J. Catalyst-Assisted Solution–Liquid–Solid Synthesis of CdS/CuInSe2 and CuInTe2/CuInSe2 Nanorod Heterostructures. Inorg Chem 2018; 58:695-702. [PMID: 30525546 DOI: 10.1021/acs.inorgchem.8b02870] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Guanwei Jia
- Henan Province Industrial Technology Research Institute of Resources and Materials, Zhengzhou University, Zhengzhou 450001, People’s Republic of China
- School of Physics and Electronics, Henan University, Kaifeng 475004, People’s Republic of China
| | - Jiang Du
- Henan Province Industrial Technology Research Institute of Resources and Materials, Zhengzhou University, Zhengzhou 450001, People’s Republic of China
- Department of Chemical Engineering, Texas Materials Institute, Center for Nano- and Molecular Science and Technology, The University of Texas at Austin, Austin, Texas 78712, United States
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5
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Wang F, Dong A, Buhro WE. Solution–Liquid–Solid Synthesis, Properties, and Applications of One-Dimensional Colloidal Semiconductor Nanorods and Nanowires. Chem Rev 2016; 116:10888-933. [DOI: 10.1021/acs.chemrev.5b00701] [Citation(s) in RCA: 130] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Fudong Wang
- Department
of Chemistry, Washington University, St. Louis, Missouri 63130-4899, United States
| | - Angang Dong
- Collaborative
Innovation Center of Chemistry for Energy Materials, Shanghai Key
Laboratory of Molecular Catalysis and Innovative Materials, and Department
of Chemistry, Fudan University, Shanghai 200433, China
| | - William E. Buhro
- Department
of Chemistry, Washington University, St. Louis, Missouri 63130-4899, United States
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6
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Aqueous preparation of surfactant-free copper selenide nanowires. J Colloid Interface Sci 2015; 442:140-6. [DOI: 10.1016/j.jcis.2014.11.052] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2014] [Revised: 11/16/2014] [Accepted: 11/20/2014] [Indexed: 11/18/2022]
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7
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Hafeez M, Ali A, Manzoor S, Bhatti AS. Anomalous optical and magnetic behavior of multi-phase Mn doped Zn(2)SiO(4) nanowires: a new class of dilute magnetic semiconductors. NANOSCALE 2014; 6:14845-14855. [PMID: 25360862 DOI: 10.1039/c4nr03501a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We present the synthesis of Mn doped Zn(2)SiO(4) dense nanowire bundles using the VLS mode of growth with unusual optical and magnetic properties. The synthesized Zn(2)SiO(4) nanowires were identified with two phases, α-Zn(2)SiO(4) as the major phase and β-Zn(2)SiO(4) as the minor phase. XPS studies confirmed that Zn(2)SiO(4) nanowires were Zn rich and Mn doped. Temperature dependent photoluminescence (PL) measurements showed three distinct emission bands: green, yellow and red due to Mn doping in the α-phase, β-phase and the substitution of Si with Mn in the α-phase, respectively. The PL analysis showed that these emission bands followed anomalous Berthelot-type behavior. The carrier escape energies were 70 ± 3 meV, 49 ± 2 meV and 65 ± 4 meV for the 530, 570 and 660 nm bands, respectively, while the radiation rates (Er =) were 1.0 ± 0.4 meV, 3.10 ± 1.10 meV and 1.4 ± 0.4 meV corresponding to the three respective bands. Mn doping of Zn(2)SiO(4) nanowires induced ferromagnetism, which was observed above room temperature, with a Curie temperature well above 380 K. The observation of magnetic behavior in this class of semiconductors has potential applications in high temperature spintronics and magneto-optical devices.
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Affiliation(s)
- Muhammad Hafeez
- Centre for Micro and Nano Devices, Department of Physics, COMSATS Institute of Information Technology, Islamabad 44000, Pakistan.
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8
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Xiong J, Li Z, Chen J, Zhang S, Wang L, Dou S. Facile synthesis of highly efficient one-dimensional plasmonic photocatalysts through Ag@Cu₂O core-shell heteronanowires. ACS APPLIED MATERIALS & INTERFACES 2014; 6:15716-15725. [PMID: 25148582 DOI: 10.1021/am502516s] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
A novel class of one-dimensional (1D) plasmonic Ag@Cu2O core-shell heteronanowires have been synthesized at room temperature for photocatalysis application. The morphology, size, crystal structure and composition of the products were investigated by XRD, SEM, TEM, XPS, and UV-vis instruments. It was found the reaction time and the amount of Ag nanowires play crucial roles in the formation of well-defined 1D Ag@Cu2O core-shell heteronanowires. The resultant 1D Ag@Cu2O NWs exhibit much higher photocatalytic activity toward degradation of organic contaminants than Ag@Cu2O core-shell nanoparticles or pure Cu2O nanospheres under solar light irradiation. The drastic enhancement in photocatalytic activity could be attributed to the surface plasmon resonance and the electron sink effect of the Ag NW cores, and the unique 1D core-shell nanostructure.
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Affiliation(s)
- Jinyan Xiong
- Institute for Superconducting & Electronic Materials and §Intelligent Polymer Research Institute, The University of Wollongong , Wollongong NSW 2500, Australia
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9
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Huang ZF, Song J, Pan L, Jia X, Li Z, Zou JJ, Zhang X, Wang L. W18O49 nanowire alignments with a BiOCl shell as an efficient photocatalyst. NANOSCALE 2014; 6:8865-8872. [PMID: 24960431 DOI: 10.1039/c4nr00905c] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Top-down nanostructure engineering and band engineering are promising methods for fabricating efficient photocatalysts with enhanced optical and electronic properties; however, composites with simultaneously engineered structure and band are very rare. Herein, we constructed a unique architecture composed of a W18O49 nanowire alignment core and porous BiOCl shell (WA@BiOCl), which combined the advantages of both an assembly structure and a type II core-shell heterojunction. The W18O49 alignments (WA) were synthesized using a "one-pot" solvothermal treatment of WCl6/NaNO3via NO3(-)-mediated assembly, whereas the W18O49 nanowires with BiOCl shell (W@BiOCl) were obtained using WCl6/BiCl3. Then, WA@BiOCl, in contrast to W@BiOCl alignments, were fabricated when WCl6 and Bi(NO3)3 were present in the starting mixture. Optical absorption, photoelectrochemical measurements and photoluminescence characterizations show that either the alignments or the core-shell heterojunctions can enhance light harvesting, photo-charge transfer and collection. As a synergetic result, the WA@BiOCl architecture exhibited very high photoactivity and photostability. Under UV-vis (or vis) irradiation, WA@BiOCl is 2.43 (1.93), 3.93 (2.73) and 5.34 (3.44)-fold more active than W@BiOCl, WA and W18O49, respectively. The results demonstrate that the simultaneous nanostructure and band engineering can produce a more efficient photocatalyst than a single strategy alone, which suggests a potential method for the fabrication of photocatalysts in the fields of environment and energy.
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Affiliation(s)
- Zhen-Feng Huang
- Key Laboratory for Green Chemical Technology of the Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China.
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10
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11
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Li Z, Sun Q, Zhu Y, Tan B, Xu ZP, Dou SX. Ultra-small fluorescent inorganic nanoparticles for bioimaging. J Mater Chem B 2014; 2:2793-2818. [DOI: 10.1039/c3tb21760d] [Citation(s) in RCA: 93] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The recent advances of ultra-small fluorescence inorganic nanoparticles including quantum dots, metal nanoclusters, carbon and graphene dots, up-conversion nanocrystals, and silicon nanoparticles have been comprehensively reviewed.
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Affiliation(s)
- Zhen Li
- Institute of Superconducting and Electronic Materials
- The University of Wollongong
- NSW 2500, Australia
| | - Qiao Sun
- Australian Institute for Bioengineering and Nanotechnology
- The University of Queensland
- Queensland 4072, Australia
| | - Yian Zhu
- Australian Institute for Bioengineering and Nanotechnology
- The University of Queensland
- Queensland 4072, Australia
| | - Bien Tan
- School of Chemistry and Chemical Engineering
- Huazhong University of Science and Technology
- Wuhan, China
| | - Zhi Ping Xu
- Australian Institute for Bioengineering and Nanotechnology
- The University of Queensland
- Queensland 4072, Australia
| | - Shi Xue Dou
- Institute of Superconducting and Electronic Materials
- The University of Wollongong
- NSW 2500, Australia
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12
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Wu L, Zhang Y, Li X, Cen C. CdS nanorod arrays with TiO2 nano-coating for improved photostability and photocatalytic activity. Phys Chem Chem Phys 2014; 16:15339-45. [DOI: 10.1039/c4cp01347f] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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13
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Li H, Wang X, Xu J, Zhang Q, Bando Y, Golberg D, Ma Y, Zhai T. One-dimensional CdS nanostructures: a promising candidate for optoelectronics. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2013; 25:3017-3037. [PMID: 23629853 DOI: 10.1002/adma.201300244] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2013] [Indexed: 06/02/2023]
Abstract
As a promising candidate for optoelectronics, one-dimensional CdS nanostructures have drawn great scientific and technical interest due to their interesting fundamental properties and possibilities of utilization in novel promising optoelectronical devices with augmented performance and functionalities. This progress report highlights a selection of important topics pertinent to optoelectronical applications of one-dimensional CdS nanostructures over the last five years. This article begins with the description of rational design and controlled synthesis of CdS nanostructure arrays, alloyed nanostructucures and kinked nanowire superstructures, and then focuses on the optoelectronical properties, and applications including cathodoluminescence, lasers, light-emitting diodes, waveguides, field emitters, logic circuits, memory devices, photodetectors, gas sensors, photovoltaics and photoelectrochemistry. Finally, the general challenges and the potential future directions of this exciting area of research are highlighted.
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Affiliation(s)
- Huiqiao Li
- State Key Laboratory of Material Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology (HUST), Wuhan 430074, PR China
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14
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Singh J, Kumar P, Hui KN, Jung J, Tiwari RS, Srivasatva ON. Morphological evolution, structural and optical investigations of ZnO:Mg (MgxZn1−xO (0 ≤ x ≤ 30%)) nanostructures. RSC Adv 2013. [DOI: 10.1039/c3ra23046e] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Kandel KP, Pietsch U, Li Z, Öztürk ÖK. Doping induced structural changes in colloidal semiconductor nanowires. Phys Chem Chem Phys 2013; 15:4444-50. [DOI: 10.1039/c3cp44500c] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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16
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Li Z, Du AJ, Sun Q, Aljada M, Zhu ZH, Lu GQM. Field-effect transistors fabricated from diluted magnetic semiconductor colloidal nanowires. NANOSCALE 2012; 4:1263-1266. [PMID: 22241294 DOI: 10.1039/c2nr11627h] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Field-effect transistors (FETs) fabricated from undoped and Co(2+)-doped CdSe colloidal nanowires show typical n-channel transistor behaviour with gate effect. Exposed to microscope light, a 10 times current enhancement is observed in the doped nanowire-based devices due to the significant modification of the electronic structure of CdSe nanowires induced by Co(2+)-doping, which is revealed by theoretical calculations from spin-polarized plane-wave density functional theory.
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Affiliation(s)
- Zhen Li
- ARC Centre of Excellence for Functional Nanomaterials, Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland (UQ), QLD 4072, Australia.
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17
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Li Z, Sun Q, Yao XD, Zhu ZH, Lu GQ(M. Semiconductor nanowires for thermoelectrics. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm33899h] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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18
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Zhu G, Zhang S, Xu Z, Ma J, Shen X. Ultrathin ZnS Single Crystal Nanowires: Controlled Synthesis and Room-Temperature Ferromagnetism Properties. J Am Chem Soc 2011; 133:15605-12. [DOI: 10.1021/ja2049258] [Citation(s) in RCA: 118] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Guoxing Zhu
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Shuguang Zhang
- School of Chemical Engineering, Shandong University of Technology, Zibo 255049, China
| | | | | | - Xiaoping Shen
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China
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White MA, Weaver AL, Beaulac R, Gamelin DR. Electrochemically controlled auger quenching of Mn²+ photoluminescence in doped semiconductor nanocrystals. ACS NANO 2011; 5:4158-4168. [PMID: 21452880 DOI: 10.1021/nn200889q] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Auger processes in colloidal semiconductor nanocrystals have been scrutinized extensively in recent years. Whether involving electron-exciton, hole-exciton, or exciton-exciton interactions, such Auger processes are generally fast and hence have been considered prominent candidates for interpreting fast processes relevant to photoluminescence blinking and multiexciton decay. With recent advances in the chemistries of nanocrystal doping, increasing attention is now being paid to analogous photophysical properties of colloidal-doped semiconductor nanocrystals. Here, we report the first investigation of the effects of electron-dopant exchange interactions on dopant luminescence in doped semiconductor nanocrystals. Using electrochemical techniques, electrical control of charge-carrier densities in films of colloidal Mn(2+)-doped CdS quantum dots has been achieved and used to demonstrate remarkably effective Auger de-excitation of photoexcited Mn(2+). The doped nanocrystals are found to be substantially more sensitive to Auger de-excitation than their undoped analogues, a result shown to arise primarily from the long Mn(2+) excited-state lifetime. This observation of exceptionally effective Auger quenching has broader implications in areas of high-power, single-particle, or electrically driven luminescence of doped semiconductor nanocrystals, and also suggests interesting opportunities for modulating Mn(2+) photoluminescence intensities on sublifetime time scales, or for imaging charge carriers in nanocrystal-based devices.
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Affiliation(s)
- Michael A White
- Department of Chemistry, University of Washington, Seattle, Washington 98195-1700, United States
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20
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Li Z, Peng X. Size/Shape-Controlled Synthesis of Colloidal CdSe Quantum Disks: Ligand and Temperature Effects. J Am Chem Soc 2011; 133:6578-86. [DOI: 10.1021/ja108145c] [Citation(s) in RCA: 230] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Zheng Li
- Department of Chemistry and Biochemistry, University of Arkansas, Fayetteville, Arkansas 72701, United States
| | - Xiaogang Peng
- Department of Chemistry and Biochemistry, University of Arkansas, Fayetteville, Arkansas 72701, United States
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Li Z, Du AJ, Sun Q, Aljada M, Cheng LN, Riley MJ, Zhu ZH, Cheng ZX, Wang XL, Hall J, Krausz E, Qiao SZ, Smith SC, Lu GQ(M. Cobalt-doped cadmium selenide colloidal nanowires. Chem Commun (Camb) 2011; 47:11894-6. [DOI: 10.1039/c1cc13467a] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Zhu G, Xu Z. Controllable Growth of Semiconductor Heterostructures Mediated by Bifunctional Ag2S Nanocrystals as Catalyst or Source-Host. J Am Chem Soc 2010; 133:148-57. [DOI: 10.1021/ja1090996] [Citation(s) in RCA: 160] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Guoxing Zhu
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing National Laboratory of Solid State Microstructure, Nanjing University, Nanjing 210093, China
| | - Zheng Xu
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing National Laboratory of Solid State Microstructure, Nanjing University, Nanjing 210093, China
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Li Z, Ma X, Sun Q, Wang Z, Liu J, Zhu Z, Qiao SZ, Smith SC, Lu GM, Mews A. Synthesis and Characterization of Colloidal Core-Shell Semiconductor Nanowires. Eur J Inorg Chem 2010. [DOI: 10.1002/ejic.201000734] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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