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Nawaz MZ, Xu L, Zhou X, Javed M, Wang J, Wu B, Wang C. Synergistic Effect of Hybrid CdSe Nanobelt/PbI 2 Flake Heterojunction Toward Drastic Performance Flexible Photodetectors. ACS APPLIED MATERIALS & INTERFACES 2023. [PMID: 36896978 DOI: 10.1021/acsami.2c22219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Despite numerous studies on broadband photodetectors, the problematic query that remains unaddressed is the limited photoresponsivity while broadening the spectral regime. Here, for the first time, a rational design of a hybrid 1D CdSe nanobelt/2D PbI2 flake heterojunction device is constructed, which substantially boosts the photocurrent while significantly attenuating the dark current, resulting in improved photodetector figures-of-merit. Thanks to the excellent quality of the nanobelt/flake and built-in electric field at the CdSe/PbI2 interface heterojunction, photogenerated carriers are promptly segregated and more photoexcitons are accumulated by the respective electrodes, enabling a high responsivity of ∼106 A/W, making this one of the highest values among similar reported hybrid heterojunction photodetectors, together with a large linear dynamic range, superior sensitivity, excellent detectivity and external quantum efficiency, an ultrafast response, and a broadband spectral response range. The similar 1D/2D hybrid heterojunction device architecture assembled on the flexible polyimide tape substrate exhibits excellent folding endurance and mechanical, flexural, and long-term environmental stability. The present device architecture and robust operational stability in an ambient environment reveals that the combination of the present 1D/2D hybrid heterojunction has incredible potential for future flexible photoelectronic devices.
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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
| | - Muhammad Javed
- 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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Kang P, Zheng KG, Wang Z, Chen L, Guo Z. Cation-exchange synthesis of PbSe/ZnSe hetero-nanobelts with enhanced near-infrared photoelectronic performance. NANOTECHNOLOGY 2021; 32:335504. [PMID: 34048367 DOI: 10.1088/1361-6528/ac0192] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Accepted: 05/14/2021] [Indexed: 06/12/2023]
Abstract
To develop excellent photoelectronic and photovoltaic devices, a semiconductor with high photoelectron production efficiency and broad band absorption is urgently required. In this article, novel II-type PbSe/ZnSe hetero-nanobelts with enhanced near-infrared absorption have been synthesized via a facile strategy of a partial cation-exchange reaction and thermal treatment. Derived from ZnSe·0.5N2H4nanobelts as templates, the belt-like morphology was preserved. Due to the mismatch of the crystal type and parameters between PbSe and ZnSe, the formed PbSe in the form of nanoparticles were separated out and decorated on the nanobelts. Furthermore, the composition ratio of Pb/Zn can be tuned through manipulating the adding amount of Pb2+cations, the reaction temperature and time. The ultraviolet-visible-infrared diffuse spectra measurements suggest that the as-prepared PbSe/ZnSe hetero-nanobelts exhibited a broad band absorption from 300 to 1000 nm. In addition, they demonstrated excellent photoresponsivity in the same wavelength region and displayed a peak at approximately 840 nm. Finally, the enhanced photoelectronic sensing mechanism was discussed.
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Affiliation(s)
- Ping Kang
- Information Materials and Intelligent Sensing Laboratory of Anhui Province, Institutes of Physical Science and Information Technology, Anhui University, Hefei 230601, People's Republic of China
- Key Laboratory of Structure and Functional Regulation of Hybrid Materials (Anhui University), Ministry of Education, Hefei 230601, People's Republic of China
| | - Kai-Ge Zheng
- Information Materials and Intelligent Sensing Laboratory of Anhui Province, Institutes of Physical Science and Information Technology, Anhui University, Hefei 230601, People's Republic of China
- Key Laboratory of Structure and Functional Regulation of Hybrid Materials (Anhui University), Ministry of Education, Hefei 230601, People's Republic of China
| | - Zhuo Wang
- Information Materials and Intelligent Sensing Laboratory of Anhui Province, Institutes of Physical Science and Information Technology, Anhui University, Hefei 230601, People's Republic of China
- Key Laboratory of Structure and Functional Regulation of Hybrid Materials (Anhui University), Ministry of Education, Hefei 230601, People's Republic of China
| | - Li Chen
- Information Materials and Intelligent Sensing Laboratory of Anhui Province, Institutes of Physical Science and Information Technology, Anhui University, Hefei 230601, People's Republic of China
- Key Laboratory of Structure and Functional Regulation of Hybrid Materials (Anhui University), Ministry of Education, Hefei 230601, People's Republic of China
| | - Zheng Guo
- Information Materials and Intelligent Sensing Laboratory of Anhui Province, Institutes of Physical Science and Information Technology, Anhui University, Hefei 230601, People's Republic of China
- Key Laboratory of Structure and Functional Regulation of Hybrid Materials (Anhui University), Ministry of Education, Hefei 230601, People's Republic of China
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Kim J, Jun M, Choi S, Jo J, Lee K. Reactive nanotemplates for synthesis of highly efficient electrocatalysts: beyond simple morphology transfer. NANOSCALE 2019; 11:20392-20410. [PMID: 31651011 DOI: 10.1039/c9nr05750a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Efficient electrocatalysts for energy conversion in general, and fuel cell operation and water electrolysis in particular, are pivotal for carbon-free hydrogen production. While the requirements of successful electrocatalysts include a high number density of catalytically active sites, high surface-to-volume ratio, inherently high catalytic activity, and robustness of the catalyst surface structure under harsh operating conditions, it is extremely difficult to synthesize nanocatalysts that could possess all these structural characteristics. Nanotemplate-mediated synthesis, namely, the coating or filling of a template with a desired material phase followed by the removal of the template, has captured the interest of researchers because of the ease of creating hollow-structured nanocatalysts with a high surface to volume ratio. Recent studies, however, have revealed that nanotemplates could be more than just passive supports because they greatly affect catalytic performance by creating an unusual synergy between the substrate and catalyst and by providing dopants to the actual catalyst phase owing to their reactive nature. In this review, we discuss the most notable recent advances in the nanotemplate-based synthesis of electrocatalysts as well as the unusual effects of nanotemplates on the performance of nanocatalysts. We also provide an outlook for this fledgling field so that future research efforts could be focused on the development of practically useful electrocatalysts that could shape the future of energy technologies.
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Affiliation(s)
- Jun Kim
- Department of Chemistry and Research Institute for Natural Sciences, Korea University, Seoul 02841, Republic of Korea.
| | - Minki Jun
- Department of Chemistry and Research Institute for Natural Sciences, Korea University, Seoul 02841, Republic of Korea.
| | - Songa Choi
- Department of Chemistry and Research Institute for Natural Sciences, Korea University, Seoul 02841, Republic of Korea.
| | - Jinhyoung Jo
- Department of Chemistry and Research Institute for Natural Sciences, Korea University, Seoul 02841, Republic of Korea.
| | - Kwangyeol Lee
- Department of Chemistry and Research Institute for Natural Sciences, Korea University, Seoul 02841, Republic of Korea.
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Li G, Su Y, Chen XX, Chen L, Li YY, Guo Z. Enhanced chemiresistive sensing performance of well-defined porous CuO-doped ZnO nanobelts toward VOCs. NANOSCALE ADVANCES 2019; 1:3900-3908. [PMID: 36132089 PMCID: PMC9419800 DOI: 10.1039/c9na00163h] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2019] [Accepted: 08/10/2019] [Indexed: 06/01/2023]
Abstract
Although the post-doping approach as a typical and effective method has been widely employed to improve the gas sensing performance of nanostructured metal oxides, it easily breaks their porous nanostructures. Herein a facile partial cation-exchange strategy combined with thermal oxidation has been developed to prepare porous CuO-doped ZnO nanobelts. Using ZnSe·0.5N2H4 nanobelts as the precursor template, Cu2Se-doped precursor nanobelts were obtained with Zn2+ cations partially exchanged by Cu2+ cations. After annealing in air, they are further oxidized into well-defined porous CuO-doped ZnO nanobelts. Through manipulating the amount of exchanged Cu2+ cations, the CuO-doping concentration can be precisely tuned. Based on the assembly approach and in situ thermal oxidation, a uniform and stable sensing film consisting of porous CuO-doped nanobelts was fabricated. Compared with pristine porous ZnO nanobelts, the as-prepared porous CuO-doped nanobelts with p-type CuO|n-type ZnO heterojunctions exhibited better sensing performance toward volatile organic compounds (VOCs). Especially for 3 at% CuO-doped porous ZnO nanobelts, the relative responses toward 100 ppm of ethanol, acetone and formaldehyde were greatly enhanced more than two, four and ten times, respectively. Due to the porous structure, they also displayed a fast response/recovery time. Finally, this enhanced sensing mechanism was discussed for porous CuO-doped ZnO nanobelts.
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Affiliation(s)
- Gang Li
- Institutes of Physical Science and Information Technology, Anhui University Hefei 230601 People's Republic of China
- Key Laboratory of Environmental Optics and Technology, Institute of Intelligent Machines, Chinese Academy of Sciences Hefei 230031 People's Republic of China
| | - Yao Su
- Key Laboratory of Environmental Optics and Technology, Institute of Intelligent Machines, Chinese Academy of Sciences Hefei 230031 People's Republic of China
| | - Xu-Xiu Chen
- Institutes of Physical Science and Information Technology, Anhui University Hefei 230601 People's Republic of China
| | - Li Chen
- Institutes of Physical Science and Information Technology, Anhui University Hefei 230601 People's Republic of China
| | - Yong-Yu Li
- Institutes of Physical Science and Information Technology, Anhui University Hefei 230601 People's Republic of China
- Key Laboratory of Environmental Optics and Technology, Institute of Intelligent Machines, Chinese Academy of Sciences Hefei 230031 People's Republic of China
| | - Zheng Guo
- Institutes of Physical Science and Information Technology, Anhui University Hefei 230601 People's Republic of China
- Key Laboratory of Environmental Optics and Technology, Institute of Intelligent Machines, Chinese Academy of Sciences Hefei 230031 People's Republic of China
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Cho G, Park Y, Hong YK, Ha DH. Ion exchange: an advanced synthetic method for complex nanoparticles. NANO CONVERGENCE 2019; 6:17. [PMID: 31155686 PMCID: PMC6545297 DOI: 10.1186/s40580-019-0187-0] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2019] [Accepted: 04/29/2019] [Indexed: 05/06/2023]
Abstract
There have been tremendous efforts to develop new synthetic methods for creating novel nanoparticles (NPs) with enhanced and desired properties. Among the many synthetic approaches, NP synthesis through ion exchange is a versatile and powerful technique providing a new pathway to design complex structures as well as metastable NPs, which are not accessible by conventional syntheses. Herein, we introduce kinetic and thermodynamic factors controlling the ion exchange reactions in NPs to fully understand the fundamental mechanisms of the reactions. Additionally, many representative examples are summarized to find related advanced techniques and unique NPs constructed by ion exchange reactions. Cation exchange reactions mainly occur in chalcogenide compounds, while anion exchange reactions are mainly involved in halogen (e.g. perovskite) and metal-chalcogenide compounds. It is expected that NP syntheses through ion exchange reactions can be utilized to create new devices with the required properties by virtue of their versatility and ability to tune fine structures.
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Affiliation(s)
- Geonhee Cho
- School of Integrative Engineering, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul, 06974 Republic of Korea
| | - Yoonsu Park
- School of Integrative Engineering, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul, 06974 Republic of Korea
| | - Yun-Kun Hong
- School of Integrative Engineering, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul, 06974 Republic of Korea
| | - Don-Hyung Ha
- School of Integrative Engineering, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul, 06974 Republic of Korea
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Hua K, Li X, Fu Z, Fang D, Bao R, Yi J, Luo Z. Cation-exchange synthesis of manganese vanadate nanosheets and its application in lithium-ion battery. J SOLID STATE CHEM 2019. [DOI: 10.1016/j.jssc.2019.02.026] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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