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Ma R, Tan Q, Liu Y, Wang Q. High performance photodetector based on CdS/CdS 0.42Se 0.58nanobelts heterojunction. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2023; 36:125305. [PMID: 38081072 DOI: 10.1088/1361-648x/ad144f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Accepted: 12/11/2023] [Indexed: 12/21/2023]
Abstract
The ternary alloy CdSxSe1-xcombines the physical properties of CdS and CdSe, and its band gap can be adjusted by changing the element composition. The alloy has charming photoelectric properties as well as potential application value in photoelectric devices. In this work, the CdS/CdS0.42Se0.58nanobelt (NB) heterojunction device was prepared by chemical vapor deposition combined with a typical dry transfer technique. The heterojunction photodetector shows high light switching ratio of 6.79 × 104, large spectral responsivity of 1260 A W-1, high external quantum efficiency of 2.66 × 105% and large detectivity of 7.19 × 1015cm Hz1/2W-1under 590 nm illumination and 3 V bias. Its rise and decay time is about 45/90μs. The performance of the heterojunction photodetector was comparable or even better than that of other CdS(Se) based photodetector device. The results indicate that the CdS/CdS0.42Se0.58NB heterojunction possesses a promising potential application in high performance photodetectors.
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Affiliation(s)
- Ran Ma
- College of Physics and Electronic Information, Yunnan Normal University, Yunnan, Kunming 650500, People's Republic of China
| | - Qiuhong Tan
- College of Physics and Electronic Information, Yunnan Normal University, Yunnan, Kunming 650500, People's Republic of China
- Yunnan Provincial Key Laboratory for Photoelectric Information Technology, Yunnan Normal University, Yunnan, Kunming 650500, People's Republic of China
| | - Yingkai Liu
- College of Physics and Electronic Information, Yunnan Normal University, Yunnan, Kunming 650500, People's Republic of China
- Yunnan Provincial Key Laboratory for Photoelectric Information Technology, Yunnan Normal University, Yunnan, Kunming 650500, People's Republic of China
| | - Qianjin Wang
- College of Physics and Electronic Information, Yunnan Normal University, Yunnan, Kunming 650500, People's Republic of China
- Yunnan Provincial Key Laboratory for Photoelectric Information Technology, Yunnan Normal University, Yunnan, Kunming 650500, People's Republic of China
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2
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Han YW, Ye L, Gong TJ, Fu Y. Surface-Controlled CdS/Ti 3 C 2 MXene Schottky Junction for Highly Selective and Active Photocatalytic Dehydrogenation-Reductive Amination. Angew Chem Int Ed Engl 2023; 62:e202306305. [PMID: 37522821 DOI: 10.1002/anie.202306305] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2023] [Revised: 07/16/2023] [Accepted: 07/31/2023] [Indexed: 08/01/2023]
Abstract
Photocatalytic valorization and selective transformation of biomass-derived platform compounds offer great opportunities for efficient utilization of renewable resources under mild conditions. Here, the novel three-dimensional hierarchical flower-like CdS/Ti3 C2 Schottky junction (MCdS) composed of surface-controlled CdS and pretreated Ti3 C2 MXene is created for photocatalytic dehydrogenation-reductive amination of biomass-derived amino acid production under ambient temperature with unprecedented activity and selectivity. Schottky junction efficiently promotes photoexcited charge migration and separation and inhibits photogenerated electron-hole recombination, which results in a super-high activity. Meanwhile, CdS with the reduced surface energy supplies sufficient hydrogen sources for imine reduction and induces the preferential orientation of alanine, thus contributing superior selectivity. Moreover, a wide range of hydroxyl acids are successfully converted into corresponding amino acids and even one-pot conversion of glucose to alanine is easily achieved over MCdS. This work illustrates the mechanism of crystal orientation control and heterojunction construction in controlling catalytic behavior of photocatalytic nanoreactor, providing a paradigm for construction of MXene-based heterostructure.
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Affiliation(s)
- Yi-Wen Han
- Hefei National Research Center for Physical Sciences at the Microscale, iChEM, CAS Key Laboratory of Urban Pollutant Conversion, Anhui Province Key Laboratory of Biomass Clean Energy, University of Science and Technology of China, No.96, JinZhai Road Baohe District, Hefei, Anhui, 230026, P. R.China
| | - Lei Ye
- School of Environmental Science and Engineering, Tianjin University, No.135, Yaguan Road Haihe Education Park, Tianjin, 300350, P. R.China
| | - Tian-Jun Gong
- Hefei National Research Center for Physical Sciences at the Microscale, iChEM, CAS Key Laboratory of Urban Pollutant Conversion, Anhui Province Key Laboratory of Biomass Clean Energy, University of Science and Technology of China, No.96, JinZhai Road Baohe District, Hefei, Anhui, 230026, P. R.China
| | - Yao Fu
- Hefei National Research Center for Physical Sciences at the Microscale, iChEM, CAS Key Laboratory of Urban Pollutant Conversion, Anhui Province Key Laboratory of Biomass Clean Energy, University of Science and Technology of China, No.96, JinZhai Road Baohe District, Hefei, Anhui, 230026, P. R.China
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3
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Lv J, Lu X, Li X, Xu M, Zhong J, Zheng X, Shi Y, Zhang X, Zhang Q. Epitaxial Growth of Lead-Free 2D Cs 3 Cu 2 I 5 Perovskites for High-Performance UV Photodetectors. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2201715. [PMID: 35638459 DOI: 10.1002/smll.202201715] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Revised: 05/02/2022] [Indexed: 06/15/2023]
Abstract
The all-inorganic lead-free Cu-based halide perovskites represented by the Cs-Cu-I system, have sparked extensive interest recently due to their impressive photophysical characteristics. However, successive works on their potential application in light emission diodes and photodetectors rely on tiny polycrystals, in which the grain boundaries and defects may lead to the performance degradation of their embodied devices. Here, 2D all-inorganic perovskite Cs3 Cu2 I5 single crystals are epitaxially grown on mica substrates, with a thickness down to 10 nm. The strong blue emission of the Cs3 Cu2 I5 flakes may originate from the radiative transition of self-trapped excitons associated with a large Stocks shift and long (microsecond) decay time. Ultravioelt (UV) photodetectors based on individual Cs3 Cu2 I5 nanosheets are fabricated via a swift and etching-free dry transfer approach, which reveal a high responsivity of 3.78 A W-1 (270 nm, 5 V bias), as well as a fast response speed (τrise ≈163 ms, τdecay ≈203 ms), outperforming congeneric UV sensors based on other 2D metal halide perovskites. This work therefore sheds light on the fabrication of green optoelectronic devices based on lead-free 2D perovskites, vital for the sustainable development of photoelectric technology.
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Affiliation(s)
- Jianan Lv
- Center for Advanced Optoelectronic Materials, College of Materials and Environmental Engineering, Hangzhou Dianzi University (HDU), Hangzhou, 310018, P. R. China
- Key Laboratory of Novel Materials for Sensor of Zhejiang Province, Hangzhou Dianzi University (HDU), Hangzhou, 310018, P. R. China
| | - Xinyue Lu
- Center for Advanced Optoelectronic Materials, College of Materials and Environmental Engineering, Hangzhou Dianzi University (HDU), Hangzhou, 310018, P. R. China
- Key Laboratory of Novel Materials for Sensor of Zhejiang Province, Hangzhou Dianzi University (HDU), Hangzhou, 310018, P. R. China
| | - Xin Li
- Center for Advanced Optoelectronic Materials, College of Materials and Environmental Engineering, Hangzhou Dianzi University (HDU), Hangzhou, 310018, P. R. China
- Key Laboratory of Novel Materials for Sensor of Zhejiang Province, Hangzhou Dianzi University (HDU), Hangzhou, 310018, P. R. China
| | - Minxuan Xu
- Center for Advanced Optoelectronic Materials, College of Materials and Environmental Engineering, Hangzhou Dianzi University (HDU), Hangzhou, 310018, P. R. China
- Key Laboratory of Novel Materials for Sensor of Zhejiang Province, Hangzhou Dianzi University (HDU), Hangzhou, 310018, P. R. China
| | - Jiasong Zhong
- Center for Advanced Optoelectronic Materials, College of Materials and Environmental Engineering, Hangzhou Dianzi University (HDU), Hangzhou, 310018, P. R. China
- Key Laboratory of Novel Materials for Sensor of Zhejiang Province, Hangzhou Dianzi University (HDU), Hangzhou, 310018, P. R. China
| | - Xin Zheng
- Center for Advanced Optoelectronic Materials, College of Materials and Environmental Engineering, Hangzhou Dianzi University (HDU), Hangzhou, 310018, P. R. China
- Key Laboratory of Novel Materials for Sensor of Zhejiang Province, Hangzhou Dianzi University (HDU), Hangzhou, 310018, P. R. China
| | - Yueqin Shi
- Center for Advanced Optoelectronic Materials, College of Materials and Environmental Engineering, Hangzhou Dianzi University (HDU), Hangzhou, 310018, P. R. China
- Key Laboratory of Novel Materials for Sensor of Zhejiang Province, Hangzhou Dianzi University (HDU), Hangzhou, 310018, P. R. China
| | - Xuefeng Zhang
- Center for Advanced Optoelectronic Materials, College of Materials and Environmental Engineering, Hangzhou Dianzi University (HDU), Hangzhou, 310018, P. R. China
| | - Qi Zhang
- Center for Advanced Optoelectronic Materials, College of Materials and Environmental Engineering, Hangzhou Dianzi University (HDU), Hangzhou, 310018, P. R. China
- Key Laboratory of Novel Materials for Sensor of Zhejiang Province, Hangzhou Dianzi University (HDU), Hangzhou, 310018, P. R. China
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Nawaz MZ, Xu L, Zhou X, Li J, Shah KH, Wang J, Wu B, Wang C. High-Performance and Broadband Flexible Photodetectors Employing Multicomponent Alloyed 1D CdS xSe 1-x Micro-Nanostructures. ACS APPLIED MATERIALS & INTERFACES 2022; 14:19659-19671. [PMID: 35438480 DOI: 10.1021/acsami.2c01002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Low-cost multicomponent alloyed one-dimensional (1D) semiconductors exhibit broadband absorption from the ultraviolet to the near-infrared regime, which has attracted a great deal of interest in high-performance flexible optoelectronic devices. Here, we report the facile one-step fabrication of high-performance broadband rigid and flexible photodevices based on multicomponent alloyed 1D cadmium-sulfur-selenide (CdSxSe1-x) micro-nanostructures obtained via a vapor transport route. Photoresponse measurements have demonstrated their superior spectral photoresponsivity (5.8 × 104 A/W), several orders of magnitude higher than the pristine CdSe nanobelt photodevice, high specific detectivity (2 × 1015 Jones), photogain (1.2 × 105), external quantum efficiency (EQE, 1.4 × 107%), rapid response speed (13 ms), and excellent long-term environmental stability. The multicomponent alloyed CdSxSe1-x nanobelt photodevice demonstrated about three times higher photocurrent as well as can operate under multiple color illuminations (200-800 nm) and at a high applied bias of 10 V with the photoresponsivity and EQE being boosted to 4.34 × 105 A/W and 8.96 × 107%, respectively. Furthermore, multicomponent alloyed CdSxSe1-x nanobelt flexible photodevices show excellent mechanical and flexural photostabilities with identical photoresponse as rigid nanodevices. The improvement mechanism found in the present research can be exploited to lead to the design of high-performance flexible photodevices comprising other multicomponent nanomaterials.
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Affiliation(s)
- Muhammad Zubair Nawaz
- College of Science and Shanghai Institute of Intelligent Electronics and Systems, Donghua University, Shanghai 201620, China
| | - Liu Xu
- College of Science and Shanghai Institute of Intelligent Electronics and Systems, Donghua University, Shanghai 201620, China
| | - Xin Zhou
- College of Science and Shanghai Institute of Intelligent Electronics and Systems, Donghua University, Shanghai 201620, China
| | - Jiaping Li
- College of Science and Shanghai Institute of Intelligent Electronics and Systems, Donghua University, Shanghai 201620, China
| | - Khizar Hussain Shah
- College of Science and Shanghai Institute of Intelligent Electronics and Systems, Donghua University, Shanghai 201620, China
| | - Jiale Wang
- College of Science and Shanghai Institute of Intelligent Electronics and Systems, Donghua University, Shanghai 201620, China
| | - Binhe Wu
- College of Science and Shanghai Institute of Intelligent Electronics and Systems, Donghua University, Shanghai 201620, China
| | - Chunrui Wang
- College of Science and Shanghai Institute of Intelligent Electronics and Systems, Donghua University, Shanghai 201620, China
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5
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Zhang J, Li T, Li X, Liu Y, Li N, Wang Y, Li X. A key role of inner-cation-π interaction in adsorption of Pb(II) on carbon nanotubes: Experimental and DFT studies. JOURNAL OF HAZARDOUS MATERIALS 2021; 412:125187. [PMID: 33545646 DOI: 10.1016/j.jhazmat.2021.125187] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2020] [Revised: 12/27/2020] [Accepted: 01/04/2021] [Indexed: 05/04/2023]
Abstract
Herein the adsorption and desorption of Pb2+ on oxidized (O-CNTs) and graphitized multi-walled carbon nanotubes (G-CNTs) were studied, and detailed adsorption mechanisms were discussed by experimental characterization and density functional theory (DFT) calculation. The adsorption of Pb2+ on CNTs was co-guided by complexation, ion exchange, electrostatic and cation-π interactions. According to the abnormally low release ratio of Pb2+ on both O-CNTs and G-CNTs (<9.03%), the O-containing groups on CNTs surface are not the only key factor affecting the adsorption behavior. The pore filling and complexation are the main mechanisms leading to irreversible adsorption, especially the important role of the inner-cation-π interaction in Pb2+ adsorption into the inner channel of CNTs at the high initial Pb2+ concentration, and DFT calculations further confirmed this result. The adsorption energy of the inner-cation-π interaction between Pb2+ and CNTs can be as high as - 77.851 kJ/mol, which is much higher than other interactions (≤-41.488 kJ/mol). Moreover, the stability of various adsorption mechanisms by HOMO-LUMO energy gap (Egap), electronic chemical potential (µ) and global hardness (η) were quantitatively measured and further revealed the inner-cation-π interaction is more stable. This study provides a deeper understanding of the removal of heavy metals by porous carbon-based nanomaterials.
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Affiliation(s)
- Jinlong Zhang
- Department of Environmental Science, School of Geography and Tourism, Shaanxi Normal University, Xi'an 710119, China; International Joint Research Centre of Shaanxi Province for Pollutants Exposure and Eco-environmental Health, Xi'an 710119, China
| | - Tao Li
- Department of Environmental Science, School of Geography and Tourism, Shaanxi Normal University, Xi'an 710119, China; International Joint Research Centre of Shaanxi Province for Pollutants Exposure and Eco-environmental Health, Xi'an 710119, China
| | - Xiaoyun Li
- Department of Environmental Science, School of Geography and Tourism, Shaanxi Normal University, Xi'an 710119, China; International Joint Research Centre of Shaanxi Province for Pollutants Exposure and Eco-environmental Health, Xi'an 710119, China.
| | - Yifan Liu
- Department of Environmental Science, School of Geography and Tourism, Shaanxi Normal University, Xi'an 710119, China; International Joint Research Centre of Shaanxi Province for Pollutants Exposure and Eco-environmental Health, Xi'an 710119, China
| | - Nana Li
- Department of Environmental Science, School of Geography and Tourism, Shaanxi Normal University, Xi'an 710119, China; International Joint Research Centre of Shaanxi Province for Pollutants Exposure and Eco-environmental Health, Xi'an 710119, China
| | - Yue Wang
- Department of Environmental Science, School of Geography and Tourism, Shaanxi Normal University, Xi'an 710119, China
| | - Xiaoping Li
- Department of Environmental Science, School of Geography and Tourism, Shaanxi Normal University, Xi'an 710119, China; International Joint Research Centre of Shaanxi Province for Pollutants Exposure and Eco-environmental Health, Xi'an 710119, China
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Zhang J, Zhai J, Zheng H, Li X, Wang Y, Li X, Xing B. Adsorption, desorption and coadsorption behaviors of sulfamerazine, Pb(II) and benzoic acid on carbon nanotubes and nano-silica. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 738:139685. [PMID: 32526408 DOI: 10.1016/j.scitotenv.2020.139685] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Revised: 05/18/2020] [Accepted: 05/23/2020] [Indexed: 06/11/2023]
Abstract
In this study, nano-silica (Nano-SiO2), oxidized (O-CNTs) and graphitized multi-walled carbon nanotubes (G-CNTs) were applied as model adsorbents to study the adsorption, desorption and coadsorption behaviors of sulfamerazine (SMR), Pb(II) and benzoic acid (BA). The results showed that charge assisted H-bond (CAHB) formation played an important role in adsorption of SMR and BA on O-riched nanomaterials. The adsorption capacities of Pb(II) on CNTs were 21.46- 26.77 times higher than that on Nano-SiO2, which was mainly attributed to surface complexation and cation-π interaction. The fraction of Pb2+ adsorbed in the inside channel of CNTs should not be ignored. In coexisting systems, the absolute sorption inhibition of the SMR (ΔQeSMR) was compared with the amount of competitor adsorbed. Competitive sorption was observed as indicated by adding Pb(II) decreased adsorption of SMR on Nano-SiO2 (ΔQeSMR > 0), but hardly affected SMR adsorption on CNTs (ΔQeSMR ≈ 0) which was attributed to cation-π interaction. In addition, CAHB formed between SMR and Nano-SiO2 (ΔpKa ≈ 4.34) was weaker than that formed between SMR and O-CNTs (ΔpKa ≈ 3.15), which also consequently resulted in stronger competition of Pb(II) to SMR on Nano-SiO2 than that on O-CNTs. Moreover, coexisting BA increased adsorption of SMR on Nano-SiO2 and G-CNTs (ΔQeSMR < 0), but did not result in an apparent competition on SMR adsorption by O-CNTs (ΔQeSMR ≈ 0). These results emphasize that the environmental behaviors of a certain pollutant should be assessed carefully by considering the presence of other pollutants.
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Affiliation(s)
- Jinlong Zhang
- School of Geography and Tourism, Shaanxi Normal University, Xi'an 710119, China; International Joint Research Centre of Shaanxi Province for Pollutants Exposure and Eco-environmental Health, Xi'an 710119, China
| | - Jieru Zhai
- School of Geography and Tourism, Shaanxi Normal University, Xi'an 710119, China; International Joint Research Centre of Shaanxi Province for Pollutants Exposure and Eco-environmental Health, Xi'an 710119, China
| | - Hao Zheng
- Institute of Coastal Environmental Pollution Control, Key Laboratory of Marine Environment and Ecology, Ministry of Education, Institute for Advanced Ocean Study, Ocean University of China, Qingdao 266100, China
| | - Xiaoyun Li
- School of Geography and Tourism, Shaanxi Normal University, Xi'an 710119, China; International Joint Research Centre of Shaanxi Province for Pollutants Exposure and Eco-environmental Health, Xi'an 710119, China.
| | - Yuru Wang
- School of Geography and Tourism, Shaanxi Normal University, Xi'an 710119, China
| | - Xiaoping Li
- School of Geography and Tourism, Shaanxi Normal University, Xi'an 710119, China; International Joint Research Centre of Shaanxi Province for Pollutants Exposure and Eco-environmental Health, Xi'an 710119, China
| | - Baoshan Xing
- Stockbridge School of Agriculture, University of Massachusetts, Amherst, MA 01003, United States.
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Sun B, Wang H, Wu J, Geng Y, Xu J, Wang Y, Li Y, Lin H, Wang L. Designed synthesis of unique ZnS@CdS@Cd 0.5Zn 0.5S-MoS 2 hollow nanospheres for efficient visible-light-driven H 2 evolution. CrystEngComm 2020. [DOI: 10.1039/d0ce00064g] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Unique ZnS@CdS@Cd0.5Zn0.5S-MoS2 hollow nanospheres with abundant active sites and enhanced light-harvesting and charge separation demonstrate efficient H2 evolution from visible-light-driven water-splitting.
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Affiliation(s)
- Bowen Sun
- Key Laboratory of Eco-Chemical Engineering
- Taishan Scholar Advantage and Characteristic Discipline Team of Eco-Chemical Process and Technology
- Key Laboratory of Rubber-Plastics of Ministry of Education
- Shandong Provincial Key Laboratory of Rubber-Plastics
- College of Chemistry and Molecular Engineering
| | - Hui Wang
- Key Laboratory of Eco-Chemical Engineering
- Taishan Scholar Advantage and Characteristic Discipline Team of Eco-Chemical Process and Technology
- Key Laboratory of Rubber-Plastics of Ministry of Education
- Shandong Provincial Key Laboratory of Rubber-Plastics
- College of Chemistry and Molecular Engineering
| | - Jiakun Wu
- Key Laboratory of Eco-Chemical Engineering
- Taishan Scholar Advantage and Characteristic Discipline Team of Eco-Chemical Process and Technology
- Key Laboratory of Rubber-Plastics of Ministry of Education
- Shandong Provincial Key Laboratory of Rubber-Plastics
- College of Chemistry and Molecular Engineering
| | - Yanling Geng
- Key Laboratory of Eco-Chemical Engineering
- Taishan Scholar Advantage and Characteristic Discipline Team of Eco-Chemical Process and Technology
- Key Laboratory of Rubber-Plastics of Ministry of Education
- Shandong Provincial Key Laboratory of Rubber-Plastics
- College of Chemistry and Molecular Engineering
| | - Jixiang Xu
- Key Laboratory of Eco-Chemical Engineering
- Taishan Scholar Advantage and Characteristic Discipline Team of Eco-Chemical Process and Technology
- Key Laboratory of Rubber-Plastics of Ministry of Education
- Shandong Provincial Key Laboratory of Rubber-Plastics
- College of Chemistry and Molecular Engineering
| | - Yaowei Wang
- Shandong Jingbo Petrochemical Co., Ltd
- Binzhou 256500
- China
| | - Yanyan Li
- Key Laboratory of Eco-Chemical Engineering
- Taishan Scholar Advantage and Characteristic Discipline Team of Eco-Chemical Process and Technology
- Key Laboratory of Rubber-Plastics of Ministry of Education
- Shandong Provincial Key Laboratory of Rubber-Plastics
- College of Chemistry and Molecular Engineering
| | - Haifeng Lin
- Key Laboratory of Eco-Chemical Engineering
- Taishan Scholar Advantage and Characteristic Discipline Team of Eco-Chemical Process and Technology
- Key Laboratory of Rubber-Plastics of Ministry of Education
- Shandong Provincial Key Laboratory of Rubber-Plastics
- College of Chemistry and Molecular Engineering
| | - Lei Wang
- Key Laboratory of Eco-Chemical Engineering
- Taishan Scholar Advantage and Characteristic Discipline Team of Eco-Chemical Process and Technology
- Key Laboratory of Rubber-Plastics of Ministry of Education
- Shandong Provincial Key Laboratory of Rubber-Plastics
- College of Chemistry and Molecular Engineering
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Ying H, Li X, Wu Y, Yao Y, Xi J, Su W, Jin C, Xu M, He Z, Zhang Q. High-performance ultra-violet phototransistors based on CVT-grown high quality SnS 2 flakes. NANOSCALE ADVANCES 2019; 1:3973-3979. [PMID: 36132114 PMCID: PMC9418408 DOI: 10.1039/c9na00471h] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Accepted: 08/21/2019] [Indexed: 05/07/2023]
Abstract
van der Waals layered two-dimensional (2D) metal dichalcogenides, such as SnS2, have garnered great interest owing to their new physics in the ultrathin limit, and become potential candidates for the next-generation electronics and/or optoelectronics fields. Herein, we report high-performance UV photodetectors established on high quality SnS2 flakes and address the relatively lower photodetection capability of the thinner flakes via a compatible gate-controlling strategy. SnS2 flakes with different thicknesses were mechanically exfoliated from CVT-grown high-quality 2H-SnS2 single crystals. The photodetectors fabricated using SnS2 flakes reveal a desired response performance (R λ ≈ 112 A W-1, EQE ≈ 3.7 × 104%, and D* ≈ 1.18 × 1011 Jones) under UV light with a very low power density (0.2 mW cm-2 @ 365 nm). Specifically, SnS2 flakes present a positive thickness-dependent photodetection behavior caused by the enhanced light absorption capacity of thicker samples. Fortunately, the responsivity of thin SnS2 flakes (e.g. ∼15 nm) could be indeed enhanced to ∼140 A W-1 under a gate bias of +20 V, reaching the performance level of thicker samples without gate bias (e.g. ∼144 A W-1 for a ∼60 nm flake). Our results offer an efficient way to choose 2D crystals with controllable thicknesses as optimal candidates for desirable optoelectronic devices.
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Affiliation(s)
- Haoting Ying
- College of Materials & Environmental Engineering, Hangzhou Dianzi University Xiasha Higher Education Zone Hangzhou 310018 P. R. China
| | - Xin Li
- College of Materials & Environmental Engineering, Hangzhou Dianzi University Xiasha Higher Education Zone Hangzhou 310018 P. R. China
| | - Yutong Wu
- College of Materials & Environmental Engineering, Hangzhou Dianzi University Xiasha Higher Education Zone Hangzhou 310018 P. R. China
| | - Yi Yao
- College of Materials & Environmental Engineering, Hangzhou Dianzi University Xiasha Higher Education Zone Hangzhou 310018 P. R. China
| | - Junhua Xi
- College of Materials & Environmental Engineering, Hangzhou Dianzi University Xiasha Higher Education Zone Hangzhou 310018 P. R. China
| | - Weitao Su
- College of Materials & Environmental Engineering, Hangzhou Dianzi University Xiasha Higher Education Zone Hangzhou 310018 P. R. China
- College of Science, Hangzhou Dianzi University Xiasha Higher Education Zone Hangzhou 310018 P. R. China
| | - Chengchao Jin
- College of Materials & Environmental Engineering, Hangzhou Dianzi University Xiasha Higher Education Zone Hangzhou 310018 P. R. China
| | - Minxuan Xu
- College of Materials & Environmental Engineering, Hangzhou Dianzi University Xiasha Higher Education Zone Hangzhou 310018 P. R. China
| | - Zhiwei He
- College of Materials & Environmental Engineering, Hangzhou Dianzi University Xiasha Higher Education Zone Hangzhou 310018 P. R. China
| | - Qi Zhang
- College of Materials & Environmental Engineering, Hangzhou Dianzi University Xiasha Higher Education Zone Hangzhou 310018 P. R. China
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9
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Lin H, Sun B, Wang H, Ruan Q, Geng Y, Li Y, Wu J, Wang W, Liu J, Wang X. Unique 1D Cd 1- x Zn x S@O-MoS 2 /NiO x Nanohybrids: Highly Efficient Visible-Light-Driven Photocatalytic Hydrogen Evolution via Integrated Structural Regulation. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2019; 15:e1804115. [PMID: 30645027 DOI: 10.1002/smll.201804115] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2018] [Revised: 11/17/2018] [Indexed: 06/09/2023]
Abstract
Development of noble-metal-free photocatalysts for highly efficient sunlight-driven water splitting is of great interest. Nevertheless, for the photocatalytic H2 evolution reaction (HER), the integrated regulation study on morphology, electronic band structures, and surface active sites of catalyst is still minimal up to now. Herein, well-defined 1D Cd1- x Znx S@O-MoS2 /NiOx hybrid nanostructures with enhanced activity and stability for photocatalytic HER are prepared. Interestingly, the band alignments, exposure of active sites, and interfacial charge separation of Cd1- x Znx S@O-MoS2 /NiOx are optimized by tuning the Zn-doping content as well as the growth of defect-rich O-MoS2 layer and NiOx nanoparticles, which endow the hybrids with excellent HER performances. Specifically, the visible-light-driven (>420 nm) HER activity of Cd1- x Znx S@O-MoS2 /NiOx with 15% Zn-doping and 0.2 wt% O-MoS2 (CZ0.15 S-0.2M-NiOx ) in lactic acid solution (66.08 mmol h-1 g-1 ) is about 25 times that of Pt loaded CZ0.15 S, which is further increased to 223.17 mmol h-1 g-1 when using Na2 S/Na2 SO3 as the sacrificial agent. Meanwhile, in Na2 S/Na2 SO3 solution, the CZ0.15 S-0.2M-NiOx sample demonstrates an apparent quantum yield of 64.1% at 420 nm and a good stability for HER under long-time illumination. The results presented in this work can be valuable inspirations for the exploitation of advanced materials for energy-related applications.
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Affiliation(s)
- Haifeng Lin
- Key Laboratory of Eco-Chemical Engineering, Taishan Scholar Advantage and Characteristic Discipline Team of Eco Chemical Process and Technology, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, P. R. China
| | - Bowen Sun
- Key Laboratory of Eco-Chemical Engineering, Taishan Scholar Advantage and Characteristic Discipline Team of Eco Chemical Process and Technology, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, P. R. China
| | - Hui Wang
- Taishan Scholar Distinguishing Discipline Talent Team of Rubber-Plastics Science and Engineering, School of Polymer Science and Engineering, Qingdao University of Science and Technology, Qingdao, 266042, P. R. China
| | - Qinqin Ruan
- Key Laboratory of Eco-Chemical Engineering, Taishan Scholar Advantage and Characteristic Discipline Team of Eco Chemical Process and Technology, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, P. R. China
| | - Yanling Geng
- Key Laboratory of Eco-Chemical Engineering, Taishan Scholar Advantage and Characteristic Discipline Team of Eco Chemical Process and Technology, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, P. R. China
| | - Yanyan Li
- Key Laboratory of Eco-Chemical Engineering, Taishan Scholar Advantage and Characteristic Discipline Team of Eco Chemical Process and Technology, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, P. R. China
| | - Jiakun Wu
- Key Laboratory of Eco-Chemical Engineering, Taishan Scholar Advantage and Characteristic Discipline Team of Eco Chemical Process and Technology, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, P. R. China
| | - Wenjing Wang
- Key Laboratory of Eco-Chemical Engineering, Taishan Scholar Advantage and Characteristic Discipline Team of Eco Chemical Process and Technology, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, P. R. China
| | - Jie Liu
- Key Laboratory of Eco-Chemical Engineering, Taishan Scholar Advantage and Characteristic Discipline Team of Eco Chemical Process and Technology, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao, 266042, P. R. China
| | - Xun Wang
- Key Lab of Organic Optoelectronics and Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing, 100084, P. R. China
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10
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Peng M, Xie X, Zheng H, Wang Y, Zhuo Q, Yuan G, Ma W, Shao M, Wen Z, Sun X. PbS Quantum Dots/2D Nonlayered CdS xSe 1- x Nanosheet Hybrid Nanostructure for High-Performance Broadband Photodetectors. ACS APPLIED MATERIALS & INTERFACES 2018; 10:43887-43895. [PMID: 30456948 DOI: 10.1021/acsami.8b15406] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Two-dimensional (2D) nonlayered nanomaterials have attracted extensive attention for electronic and optoelectronic applications recently because of their distinct properties. In this work, we first employed a facile one-step method to synthesize 2D nonlayered cadmium sulfide selenide (CdS xSe1- x, x = 0.33) nanosheets with a highly crystalline structure and then we introduced a generic spin-coating approach to fabricate hybrid nanomaterials composed of PbS quantum dots (QDs) and 2D CdS xSe1- x nanosheets and demonstrated their potential for high-performance broadband photodetectors. Compared with pure 2D CdS xSe1- x nanosheet photodetectors, the photoelectric performance of the PbS/CdS xSe1- x hybrid nanostructure is enhanced by 3 orders of magnitude under near-infrared (NIR) light illumination and maintains its performance in the visible (Vis) range. The photodetector exhibits a broadband response range from Vis to NIR with an ultrahigh light-to-dark current ratio (3.45 × 106), a high spectral responsivity (1.45 × 103 A/W), and high detectivity (1.05 × 1015 Jones). The proposed QDs/2D nonlayered hybrid nanostructure-based photodetector paves a promising way for next-generation high-performance broadband optoelectronic devices.
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Affiliation(s)
- Mingfa Peng
- Institute of Functional Nano and Soft Materials (FUNSOM) and Jiangsu Key Laboratory for Carbon-based Functional Materials and Devices , Soochow University , Suzhou , Jiangsu 215123 , P. R. China
| | - Xinkai Xie
- Institute of Functional Nano and Soft Materials (FUNSOM) and Jiangsu Key Laboratory for Carbon-based Functional Materials and Devices , Soochow University , Suzhou , Jiangsu 215123 , P. R. China
| | - Hechuang Zheng
- Institute of Functional Nano and Soft Materials (FUNSOM) and Jiangsu Key Laboratory for Carbon-based Functional Materials and Devices , Soochow University , Suzhou , Jiangsu 215123 , P. R. China
| | - Yongjie Wang
- Institute of Functional Nano and Soft Materials (FUNSOM) and Jiangsu Key Laboratory for Carbon-based Functional Materials and Devices , Soochow University , Suzhou , Jiangsu 215123 , P. R. China
| | - Qiqi Zhuo
- College of Material Science & Engineering , Jiangsu University of Science and Technology , Zhenjiang , Jiangsu 212003 , P. R. China
| | - Guotao Yuan
- Institute of Functional Nano and Soft Materials (FUNSOM) and Jiangsu Key Laboratory for Carbon-based Functional Materials and Devices , Soochow University , Suzhou , Jiangsu 215123 , P. R. China
| | - Wanli Ma
- Institute of Functional Nano and Soft Materials (FUNSOM) and Jiangsu Key Laboratory for Carbon-based Functional Materials and Devices , Soochow University , Suzhou , Jiangsu 215123 , P. R. China
| | - Mingwang Shao
- Institute of Functional Nano and Soft Materials (FUNSOM) and Jiangsu Key Laboratory for Carbon-based Functional Materials and Devices , Soochow University , Suzhou , Jiangsu 215123 , P. R. China
| | - Zhen Wen
- Institute of Functional Nano and Soft Materials (FUNSOM) and Jiangsu Key Laboratory for Carbon-based Functional Materials and Devices , Soochow University , Suzhou , Jiangsu 215123 , P. R. China
| | - Xuhui Sun
- Institute of Functional Nano and Soft Materials (FUNSOM) and Jiangsu Key Laboratory for Carbon-based Functional Materials and Devices , Soochow University , Suzhou , Jiangsu 215123 , P. R. China
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11
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Lu J, Liu H, Zhang X, Sow CH. One-dimensional nanostructures of II-VI ternary alloys: synthesis, optical properties, and applications. NANOSCALE 2018; 10:17456-17476. [PMID: 30211428 DOI: 10.1039/c8nr05019h] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
One-dimensional (1D) nanostructures of II-VI ternary alloys are of prime interest due to their compatible features of both 1D nanostructures and semiconducting alloys. These features can facilitate materials with tunable bandgaps, which are crucial to the performance of photoelectrical devices. Herein, we present a comprehensive review summarizing the recent research progress pertinent to the diverse synthesis, optical fundamentals and applications of 1D nanostructures of II-VI ternary alloys. Considering multifunctional applications, the different growth mechanisms of the rational design and synthesis techniques are highlighted. Investigations of the fundamentals of the optical and photoelectrical properties of ternary alloyed II-VI semiconductors via the corresponding characterization techniques are also particularly discussed. Furthermore, we present the versatile potential practical applications of these materials. Finally, we extend the discussion to the most recent research advances on quaternary alloys, which provides a possible prospective forecast for the sustained development of alloyed 1D nanostructures.
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Affiliation(s)
- Junpeng Lu
- School of Physics, Southeast University, 2 Southeast University Road, Nanjing 211189, China.
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12
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Tang M, Xu P, Wen Z, Chen X, Pang C, Xu X, Meng C, Liu X, Tian H, Raghavan N, Yang Q. Fast response CdS-CdS xTe 1-x-CdTe core-shell nanobelt photodetector. Sci Bull (Beijing) 2018; 63:1118-1124. [PMID: 36658991 DOI: 10.1016/j.scib.2018.08.003] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2018] [Revised: 07/06/2018] [Accepted: 07/30/2018] [Indexed: 01/21/2023]
Abstract
Quasi-one-dimensional semiconductor nanostructure-based photodetectors show high sensitivity but suffer from slow response speed due to surface reaction. Here, we report a fast-response CdS-CdSxTe1-x-CdTe core-shell nanobelt photodetector with a rise time of 11 μs, which is the fastest among CdS based photodetectors reported previously. The improved response speed is ascribed to the suppressed possibilities of surface reaction resulting from the core-shell structure and heterojunction among the CdS, CdSxTe1-x and CdTe. The measured response spectrum of CdS-CdSxTe1-x-CdTe core-shell nanobelt photodetector covers a wide range from 355 to 785 nm. Moreover, high responsivity (1,520 A/W) and large 3 dB bandwidth (∼22.9 kHz) are obtained along with the fast response. The high performance in responsivity, sensitivity, spectral response and photoresponse speed makes this device a promising candidate for practical application in optical sensing, communication and imaging.
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Affiliation(s)
- Mingwei Tang
- State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Pengfei Xu
- The Fifth Research Institute of Ministry of Industry and Information Technology (MIIT), Guangzhou 510610, China
| | - Zhong Wen
- State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Xing Chen
- Center of Electron Microscopy, Zhejiang University, Hangzhou 310027, China
| | - Chenlei Pang
- State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Xuechu Xu
- State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Chao Meng
- State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Xiaowei Liu
- State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - He Tian
- Center of Electron Microscopy, Zhejiang University, Hangzhou 310027, China
| | - Nagarajan Raghavan
- Engineering Product Development (EPD) Pillar, Singapore University of Technology and Design, Singapore 487372, Singapore
| | - Qing Yang
- State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou 310027, China; Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China.
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13
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Wei Q, Chen J, Ding P, Shen B, Yin J, Xu F, Xia Y, Liu Z. Synthesis of Easily Transferred 2D Layered BiI 3 Nanoplates for Flexible Visible-Light Photodetectors. ACS APPLIED MATERIALS & INTERFACES 2018; 10:21527-21533. [PMID: 29847912 DOI: 10.1021/acsami.8b02582] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Bismuth triiodide, BiI3, is one of the promising 2D layered materials from the family of metal halides. The unique electronic structure and properties make it an attractive material for the room-temperature gamma/X-ray detectors, high-efficiency photovoltaic absorbers, and Bi-based organic-inorganic hybrid perovskites. Other possibilities including optoelectronic devices and optical circuits are envisioned but rarely experimentally confirmed yet. Here, we report the synthesis of vertical 2D BiI3 nanoplates using the physical vapor deposition mechanism. The obtained products were found easy to be separated and transferred to other substrates. Photodetectors employing such 2D nanoplates on polyethylene terephthalate substrate are demonstrated to be quite sensitive to red light (635 nm) with good responsivity (2.8 A W-1), fast stable photoresponse (3/9 ms for raise/decay times), and remarkable specific detectivity (1.2 × 1012 jones), which attest to high comparability of the assembled components with many latest 2D nanostructured light sensors. In addition, such photodetectors exhibit outstanding mechanical stability and durability under different bending strains within the theoretically affordable levels, suggesting a variety of potential applications of 2D BiI3 for flexible devices.
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14
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Ding N, Xu J, Zhang Q, Su J, Gao Y, Zhou X, Zhai T. Controllable Carrier Type in Boron Phosphide Nanowires Toward Homostructural Optoelectronic Devices. ACS APPLIED MATERIALS & INTERFACES 2018; 10:10296-10303. [PMID: 29504739 DOI: 10.1021/acsami.7b17204] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The p-n junction is one important and fundamental building block of the optoelectronic age. However, electrons and holes will be severely scattered in heterostructures led by the grain boundary at the alloy interface between two dissimilar semiconductors. In this work, we present boron phosphide (BP) nanowires with artificially controllable carrier type for the fabrication of homojunctions via adjusting borane/phosphine ratio during the deposition process, both prove high crystallization with fewer impurities. The homojunctions that consist of n-type and p-type BP nanowires show apparent photovoltaic effect [external quantum efficiency ≈ 10% under a ∼0.4 pW light @ 600 nm] and the quenched photoluminescence within the junction area, which indicates the effective separation and transfer of photogenerated charge carriers at the interface. The achievement of controllable carrier type implemented in the same material ushers in a frontier for the design of nanoscale homojunctions toward advanced optoelectronic devices.
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Affiliation(s)
- Nan Ding
- 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 , P. R. China
| | - Junqi Xu
- 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 , P. R. China
| | - Qi Zhang
- 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 , P. R. China
| | - Jianwei Su
- 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 , P. R. China
| | - Yu Gao
- 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 , P. R. China
| | - Xing Zhou
- 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 , P. R. China
| | - Tianyou Zhai
- 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 , P. R. China
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15
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Achieving highly uniform two-dimensional PbI 2 flakes for photodetectors via space confined physical vapor deposition. Sci Bull (Beijing) 2017; 62:1654-1662. [PMID: 36659385 DOI: 10.1016/j.scib.2017.11.011] [Citation(s) in RCA: 79] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2017] [Revised: 10/23/2017] [Accepted: 10/31/2017] [Indexed: 01/21/2023]
Abstract
Two-dimensional (2D) PbI2 flakes have been attracting intensive attention as one potential candidate for the modern optoelectronics. However, suffered from the instability of kinetics-driven growth, the fabricated 2D PbI2 flakes have a wide dimensional distribution even under the same conditions. Herein, a novel facile space confined physical vapor deposition (PVD) process is provided to synthesize uniform triangle PbI2 flakes with high quality. The confined space provides a relatively stable growth environment that renders more control on the growth kinetics, leading to highly uniform triangle PbI2 flakes with the average size of 5 µm and thickness of 17 nm. Moreover, as-fabricated PbI2-based photodetectors show promising stable and flexible optoelectronic performances to 470 nm light, including high responsivity (0.72 A W-1), large on/off ratio up to 900, fast photoresponse speed (rise time of 13.5 ms and decay time of 20 ms) and high detectivity (1.04 × 1010 Jones). The well-controllable growth of the uniform triangle PbI2 flakes and the detailed exploration of their optoelectronic properties are particularly valuable for their further practical applications.
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16
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Zhang C, Cretu O, Kvashnin DG, Kawamoto N, Mitome M, Wang X, Bando Y, Sorokin PB, Golberg D. Statistically Analyzed Photoresponse of Elastically Bent CdS Nanowires Probed by Light-Compatible In Situ High-Resolution TEM. NANO LETTERS 2016; 16:6008-6013. [PMID: 27606954 DOI: 10.1021/acs.nanolett.6b01614] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We demonstrate that high resolution transmission electron microscopy (HRTEM) paired with light illumination of a sample and its electrical probing can be utilized for the in situ study of initiated photocurrents in free-standing nanowires. Morphology, phase and crystallographic information from numerous individual CdS nanowires is obtained simultaneously with photocurrent measurements. Our results indicate that elastically bent CdS nanowires possessing a wurtzite structure show statistically unchanged values of ON/OFF (photocurrent/dark current) ratios. Photocurrent spectroscopy reveals red shifts of several nanometers in the cutoff wavelength after nanowire bending. This results from deformation-induced lattice strain and associated changes in the nanowire band structure, as confirmed by selected area electron diffraction (SAED) analyses and density functional tight binding (DFTB) simulations. The ON/OFF ratio stabilities and photocurrent spectroscopy shift of bent CdS nanowires are important clues for future flexible electronics, optoelectronics, and photovoltaics.
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Affiliation(s)
- Chao Zhang
- International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS) , Namiki 1-1, Tsukuba, Ibaraki 3050044, Japan
- Graduate School of Pure and Applied Sciences, Tennodai 1, University of Tsukuba , Tsukuba, Ibaraki 3058577, Japan
| | - Ovidiu Cretu
- International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS) , Namiki 1-1, Tsukuba, Ibaraki 3050044, Japan
| | - Dmitry G Kvashnin
- National University of Science and Technology "MISIS" , Leninsky Prospect 4, Moscow 119049, Russian Federation
- Emanuel Institute of Biochemical Physics RAS , Kosigina st. 4, Moscow 119334, Russian Federation
| | - Naoyuki Kawamoto
- International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS) , Namiki 1-1, Tsukuba, Ibaraki 3050044, Japan
| | - Masanori Mitome
- International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS) , Namiki 1-1, Tsukuba, Ibaraki 3050044, Japan
| | - Xi Wang
- School of Sciences, Beijing Jiaotong University , Beijing 100044, P. R. China
| | - Yoshio Bando
- International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS) , Namiki 1-1, Tsukuba, Ibaraki 3050044, Japan
| | - Pavel B Sorokin
- National University of Science and Technology "MISIS" , Leninsky Prospect 4, Moscow 119049, Russian Federation
| | - Dmitri Golberg
- International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS) , Namiki 1-1, Tsukuba, Ibaraki 3050044, Japan
- Graduate School of Pure and Applied Sciences, Tennodai 1, University of Tsukuba , Tsukuba, Ibaraki 3058577, Japan
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17
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Zhang H, Liao Q, Wang X, Hu K, Yao J, Fu H. Controlled Substitution of Chlorine for Iodine in Single-Crystal Nanofibers of Mixed Perovskite MAPbI3- x Clx. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2016; 12:3780-3787. [PMID: 27248518 DOI: 10.1002/smll.201601201] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2016] [Revised: 05/01/2016] [Indexed: 06/05/2023]
Abstract
Longer carrier diffusion length and improved power conversion efficiency have been reported for thin-film solar cell of organolead mixed-halide perovskite MAPbI3- x Cl x in comparison with MAPbI3 . Instead of substituting I in the MAPbI3 lattice, Cl-incorporation has been shown to mainly improve the film morphology of perovskite absorber. Well-defined crystal structure, adjustable composition (x), and regular morphology, remains a formidable task. Herein, a facile solution-assembly method is reported for synthesizing single-crystalline nanofibers (NFs) of tetragonal-lattice MAPbI3- x Cl x with the Cl-content adjustable between 0 ≤ x ≤ 0.75, leading to a gradual blueshift of the absorption and photoluminescence maxima from x = 0 to 0.75. The photoresponsivity (R) of MAPbI3 NFs keeps almost unchanging at a value independent of the white-light illumination intensity (P). In contrast, R of MAPbI3- x Cl x NFs decreases rapidly with increasing both the x and P values, indicating Cl-substitution increases the recombination traps of photogenerated free electrons and holes. This study provides a model system to examine the role of extrinsic Cl ions in both perovskite crystallography and optoelectronic properties.
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Affiliation(s)
- Haihua Zhang
- Beijing Key Laboratory for Optical Materials and Photonic Devices, Department of Chemistry, Capital Normal University, Beijing, 100048, P. R. China
| | - Qing Liao
- Beijing Key Laboratory for Optical Materials and Photonic Devices, Department of Chemistry, Capital Normal University, Beijing, 100048, P. R. China
| | - Xuedong Wang
- Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Ke Hu
- Beijing Key Laboratory for Optical Materials and Photonic Devices, Department of Chemistry, Capital Normal University, Beijing, 100048, P. R. China
| | - Jiannian Yao
- Beijing Key Laboratory for Optical Materials and Photonic Devices, Department of Chemistry, Capital Normal University, Beijing, 100048, P. R. China
- Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Hongbing Fu
- Beijing Key Laboratory for Optical Materials and Photonic Devices, Department of Chemistry, Capital Normal University, Beijing, 100048, P. R. China
- Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry, Tianjin University, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin, 300072, P. R. China
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