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Liu H, Zhou W, Chen X, Huang P, Wang X, Zhou G, Xu J. Replicating CD Nanogrooves onto PDMS to Guide Nanowire Growth for Monolithic Flexible Photodetectors with High Bending-Stable UV-vis-NIR Photoresponse. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2403870. [PMID: 38899831 PMCID: PMC11348143 DOI: 10.1002/advs.202403870] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2024] [Revised: 05/23/2024] [Indexed: 06/21/2024]
Abstract
Guided nanowires grown on polymer surfaces facilitate their seamless integration as flexible devices without post-growth processing steps. However, this is challenging due to the inability of polymer films to provide the required lattice-matching effect. In this work, this challenge is addressed by replicating highly aligned nanogrooves from a compact disc (CD) onto a casted flexible polydimethylsiloxane (PDMS) surface. Leveraging the replicated nanogrooves, copper hexadecafluorophthalocyanine (F16CuPc) and various metal phthalocyanines are guided into large-area, self-aligned nanowires. Subsequently, by employing specifically designed shadow masks during electrode deposition, these nanowires are seamlessly integrated as either a monolithic flexible photodetector with a large sensing area or on-chip flexible photodetector arrays. The resulting flexible photodetectors exhibit millisecond and long-term stable response to UV-vis-NIR light. Notably, they demonstrate exceptional bending stability, retaining stable and sensitive photoresponse even at a curvature radius as low as 0.5 cm and after enduring 1000 bending cycles. Furthermore, the photodetector array showcases consistent sensitivity and response speed across the entire array. This work not only proves the viability of guided nanowire growth on flexible polymer surfaces by replicating CD nanogrooves but also underscores the potential for large-scale monolithic integration of guided nanowires as flexible devices.
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Affiliation(s)
- Hanyu Liu
- Guangdong Provincial Key Laboratory of Optical Information Materials and Technology & Institute of Electronic Paper DisplaysSouth China Academy of Advanced OptoelectronicsSouth China Normal UniversityGuangzhou510006P. R. China
| | - Wei Zhou
- Guangdong Provincial Key Laboratory of Optical Information Materials and Technology & Institute of Electronic Paper DisplaysSouth China Academy of Advanced OptoelectronicsSouth China Normal UniversityGuangzhou510006P. R. China
| | - Xiangtao Chen
- Guangdong Provincial Key Laboratory of Optical Information Materials and Technology & Institute of Electronic Paper DisplaysSouth China Academy of Advanced OptoelectronicsSouth China Normal UniversityGuangzhou510006P. R. China
| | - Pingyang Huang
- Guangdong Provincial Key Laboratory of Optical Information Materials and Technology & Institute of Electronic Paper DisplaysSouth China Academy of Advanced OptoelectronicsSouth China Normal UniversityGuangzhou510006P. R. China
| | - Xingyu Wang
- Guangdong Provincial Key Laboratory of Optical Information Materials and Technology & Institute of Electronic Paper DisplaysSouth China Academy of Advanced OptoelectronicsSouth China Normal UniversityGuangzhou510006P. R. China
| | - Guofu Zhou
- Guangdong Provincial Key Laboratory of Optical Information Materials and Technology & Institute of Electronic Paper DisplaysSouth China Academy of Advanced OptoelectronicsSouth China Normal UniversityGuangzhou510006P. R. China
| | - Jinyou Xu
- Guangdong Provincial Key Laboratory of Optical Information Materials and Technology & Institute of Electronic Paper DisplaysSouth China Academy of Advanced OptoelectronicsSouth China Normal UniversityGuangzhou510006P. R. China
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Liu H, Liu D, Yang J, Gao H, Wu Y. Flexible Electronics Based on Organic Semiconductors: from Patterned Assembly to Integrated Applications. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2206938. [PMID: 36642796 DOI: 10.1002/smll.202206938] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Revised: 12/26/2022] [Indexed: 06/17/2023]
Abstract
Organic flexible electronic devices are at the forefront of the electronics as they possess the potential to bring about a major lifestyle revolution owing to outstanding properties of organic semiconductors, including solution processability, lightweight and flexibility. For the integration of organic flexible electronics, the precise patterning and ordered assembly of organic semiconductors have attracted wide attention and gained rapid developments, which not only reduces the charge crosstalk between adjacent devices, but also enhances device uniformity and reproducibility. This review focuses on recent advances in the design, patterned assembly of organic semiconductors, and flexible electronic devices, especially for flexible organic field-effect transistors (FOFETs) and their multifunctional applications. First, typical organic semiconductor materials and material design methods are introduced. Based on these organic materials with not only superior mechanical properties but also high carrier mobility, patterned assembly strategies on flexible substrates, including one-step and two-step approaches are discussed. Advanced applications of flexible electronic devices based on organic semiconductor patterns are then highlighted. Finally, future challenges and possible directions in the field to motivate the development of the next generation of flexible electronics are proposed.
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Affiliation(s)
- Haoran Liu
- Ji Hua Laboratory, Foshan, Guangdong, 528000, P. R. China
| | - Dong Liu
- Key Laboratory of Industrial Biocatalysis, Ministry of Education, Department of Chemical Engineering, Tsinghua University, Beijing, 100084, P. R. China
| | - Junchuan Yang
- Key Laboratory of Bio-inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Hanfei Gao
- Ji Hua Laboratory, Foshan, Guangdong, 528000, P. R. China
| | - Yuchen Wu
- Ji Hua Laboratory, Foshan, Guangdong, 528000, P. R. China
- Key Laboratory of Bio-inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
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Lu Y, Qu K, Zhang T, He Q, Pan J. Metal Halide Perovskite Nanowires: Controllable Synthesis, Mechanism, and Application in Optoelectronic Devices. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:419. [PMID: 36770381 PMCID: PMC9919554 DOI: 10.3390/nano13030419] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Revised: 01/08/2023] [Accepted: 01/16/2023] [Indexed: 06/18/2023]
Abstract
Metal halide perovskites are promising energy materials because of their high absorption coefficients, long carrier lifetimes, strong photoluminescence, and low cost. Low-dimensional halide perovskites, especially one-dimensional (1D) halide perovskite nanowires (NWs), have become a hot research topic in optoelectronics owing to their excellent optoelectronic properties. Herein, we review the synthetic strategies and mechanisms of halide perovskite NWs in recent years, such as hot injection, vapor phase growth, selfassembly, and solvothermal synthesis. Furthermore, we summarize their applications in optoelectronics, including lasers, photodetectors, and solar cells. Finally, we propose possible perspectives for the development of halide perovskite NWs.
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Affiliation(s)
| | | | | | - Qingquan He
- Correspondence: (Q.H.); (J.P.); Tel.: +86-1-520-193-3096(Q.H.); +86-1-348-617-8387(J.P.)
| | - Jun Pan
- Correspondence: (Q.H.); (J.P.); Tel.: +86-1-520-193-3096(Q.H.); +86-1-348-617-8387(J.P.)
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Liu B, Zhou J, Xu X, Li B. Thermal conductivity of one-dimensional organic nanowires: effect of mass difference phonon scattering. NANOTECHNOLOGY 2020; 31:324003. [PMID: 32325442 DOI: 10.1088/1361-6528/ab8c75] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
We report the thermal conductivity of π-stacked metallophthalocyanine nanowires using the thermal bridge method. In the temperature range of 20-300 K, the thermal conductivity of copper phthalocyanine nanowires (CuPc NWs) and iron phthalocyanine nanowires (FePc NWs) increases with temperature and reaches a peak value at around T = 40 K, then decreases at a higher temperature following T -1 behavior. For three FePc NWs, the peak values are 7.1 ± 1.21, 8.3 ± 1.33, and 7.6 ± 1.42 Wm-1 K-1, respectively. The peak thermal conductivity is 6.6 ± 0.67 and 6.6 ± 0.51 Wm-1 K-1 for the two CuPc nanowires. The thermal conductivity of FePc NWs is slightly larger than that of CuPc NWs, which is believed to result from the different mass of metal atoms in the phthalocyanine centers, indicating a phonon mass-difference scattering effect. Meanwhile, the thermal contact conductance of the FePc-Pt interface is measured, which will benefit from a better understanding of the thermal transport across dissimilar interfaces.
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Affiliation(s)
- Bohai Liu
- Center for Phononics and Thermal Energy Science, China-EU Joint Center for Nanophononics, School of Physics Science and Engineering, Tongji University, Shanghai 200092, People's Republic of China
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5
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Wang Y, Sun L, Wang C, Yang F, Ren X, Zhang X, Dong H, Hu W. Organic crystalline materials in flexible electronics. Chem Soc Rev 2019; 48:1492-1530. [PMID: 30283937 DOI: 10.1039/c8cs00406d] [Citation(s) in RCA: 153] [Impact Index Per Article: 30.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Flexible electronics have attracted considerable attention recently given their potential to revolutionize human lives. High-performance organic crystalline materials (OCMs) are considered strong candidates for next-generation flexible electronics such as displays, image sensors, and artificial skin. They not only have great advantages in terms of flexibility, molecular diversity, low-cost, solution processability, and inherent compatibility with flexible substrates, but also show less grain boundaries with minimal defects, ensuring excellent and uniform electronic characteristics. Meanwhile, OCMs also serve as a powerful tool to probe the intrinsic electronic and mechanical properties of organics and reveal the flexible device physics for further guidance for flexible materials and device design. While the past decades have witnessed huge advances in OCM-based flexible electronics, this review is intended to provide a timely overview of this fascinating field. First, the crystal packing, charge transport, and assembly protocols of OCMs are introduced. State-of-the-art construction strategies for aligned/patterned OCM on/into flexible substrates are then discussed in detail. Following this, advanced OCM-based flexible devices and their potential applications are highlighted. Finally, future directions and opportunities for this field are proposed, in the hope of providing guidance for future research.
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Affiliation(s)
- Yu Wang
- Tianjin Key Laboratory of Molecular Optoelectronic Science, Department of Chemistry, School of Science, Tianjin University & Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China.
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6
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Zhao X, Liu T, Shi W, Hou X, Dennis TJS. Capillary-written single-crystalline all-inorganic perovskite microribbon arrays for highly-sensitive and thermal-stable photodetectors. NANOSCALE 2019; 11:2453-2459. [PMID: 30667445 DOI: 10.1039/c8nr08890j] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
In recent times, as a result of its exceptional resistance to moisture and heat, cesium lead bromide (CsPbBr3) has been established as a potential high-performance perovskite material for optoelectronics, which is inclusive of photodetectors and photovoltaics. It has been demonstrated that a perovskite single crystal has major benefits over its thin-film equivalents; nevertheless, the preparation of perovskite crystal arrays for the utilisation of extensive integration is a challenging task. In this paper, we consider a simple crystallisation system, being a capillary-written system to enable the growth of single crystal microribbon arrays (MRAs) directly from a precursor solution. It is demonstrated by microstructure characterisation that CsPbBr3 MRAs are good-quality single crystals with highly-aligned crystal packing and smooth surfaces. The band-edge photoluminescence (PL) is exceptionally resilient and has a lengthy PL life of ∼62 ns. An exceptional photo-response having a particularly quick 99 μs response time and a 2496 A W-1 ultra-high responsivity is exhibited by photodetectors which are built upon these MRAs. The fact that the as-fabricated photodetectors maintain 90% of their commencing performance following 100 days of constant stress testing under ambient conditions under an illumination of 450 nm, showing exceptional operational stability, is noteworthy. A significant step towards the large-area growth of high-quality perovskite MRAs is presented by this work. This supplies favourable opportunities to build high-performance optoelectronic and nanophotonic systems.
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Affiliation(s)
- Xiaoming Zhao
- School of Physics and Astronomy, Queen Mary University of London, Mile End Road, London E1 4NS, UK.
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7
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Sun X, An X, Zhang S, Li Z, Zhang J, Wu W, Wu M. Physical vapor deposition (PVD): a method to fabricate modified g-C 3N 4 sheets. NEW J CHEM 2019. [DOI: 10.1039/c8nj06509h] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We develop a method of physical vapor deposition (PVD) to fabricate modified g-C3N4 sheets with abundant defects.
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Affiliation(s)
- Xiaohui Sun
- State Key Laboratory of Petroleum Pollution Control
- Beijing
- P. R. China
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum
- Qingdao 266580
| | - Xianghui An
- State Key Laboratory of Petroleum Pollution Control
- Beijing
- P. R. China
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum
- Qingdao 266580
| | - Sa Zhang
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum
- Qingdao 266580
- China
| | - Zhongtao Li
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum
- Qingdao 266580
- China
| | - Jing Zhang
- State Key Laboratory of Safety and Control for Chemicals, SINOPEC Research Institute of Safety Engineering
- Qingdao
- China
| | - Wenting Wu
- State Key Laboratory of Petroleum Pollution Control
- Beijing
- P. R. China
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum
- Qingdao 266580
| | - Mingbo Wu
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum
- Qingdao 266580
- China
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8
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Wang H, Lin H, Fan X, Ostendorp S, Wang Y, Huang L, Jiang L, Li Y, Wilde G, Fuchs H, Wang W, Chi L. Positioning growth of NPB crystalline nanowires on the PTCDA nanocrystal template. NANOSCALE 2018; 10:10262-10267. [PMID: 29790565 DOI: 10.1039/c8nr02085j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Non-planar organic molecules often form amorphous films via vapor phase deposition on surfaces. In this study, we demonstrate for the first time that direct crystalline growth of non-planar NPB is possible when the orientation of initially deposited molecules on a PTCDA nanocrystal template is controlled to make it analogous to the structure of the molecular crystal. The crystalline NPB nanowires can be further positioned by controlling the site-selective growth of PTCDA nanocrystal templates at pre-determined locations. Short channel bottom contact OFET array with the NPB nanowires directly grown on electrodes were subsequently fabricated. The hole mobility of NPB nanowires is improved by 40-fold in comparison to that of the amorphous films.
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Affiliation(s)
- Hong Wang
- Physikalisches Institut and Center for Nanotechnology (CeNTech), Universität Münster, 48149 Münster, Germany.
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9
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Xie C, Yan F. Flexible Photodetectors Based on Novel Functional Materials. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2017; 13:1701822. [PMID: 28922544 DOI: 10.1002/smll.201701822] [Citation(s) in RCA: 91] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2017] [Revised: 07/08/2017] [Indexed: 06/07/2023]
Abstract
Flexible photodetectors have attracted a great deal of research interest in recent years due to their great possibilities for application in a variety of emerging areas such as flexible, stretchable, implantable, portable, wearable and printed electronics and optoelectronics. Novel functional materials, including materials with zero-dimensional (0D) and one-dimensional (1D) inorganic nanostructures, two-dimensional (2D) layered materials, organic semiconductors and perovskite materials, exhibit appealing electrical and optoelectrical properties, as well as outstanding mechanical flexibility, and have been widely studied as building blocks in cost-effective flexible photodetection. Here, we comprehensively review the outstanding performance of flexible photodetectors made from these novel functional materials reported in recent years. The photoresponse characteristics and flexibility of the devices will be discussed systematically. Summaries and challenges are provided to guide future directions of this vital research field.
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Affiliation(s)
- Chao Xie
- Department of Applied Physics, The Hong Kong Polytechnic University, Hong Kong, China
- School of Electronic Science and Applied Physics, Hefei University of Technology, Hefei, 230009, China
| | - Feng Yan
- Department of Applied Physics, The Hong Kong Polytechnic University, Hong Kong, China
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10
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Shoaib M, Zhang X, Wang X, Zhou H, Xu T, Wang X, Hu X, Liu H, Fan X, Zheng W, Yang T, Yang S, Zhang Q, Zhu X, Sun L, Pan A. Directional Growth of Ultralong CsPbBr 3 Perovskite Nanowires for High-Performance Photodetectors. J Am Chem Soc 2017; 139:15592-15595. [PMID: 29058888 DOI: 10.1021/jacs.7b08818] [Citation(s) in RCA: 107] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Directional growth of ultralong nanowires (NWs) is significant for practical application of large-scale optoelectronic integration. Here, we demonstrate the controlled growth of in-plane directional perovskite CsPbBr3 NWs, induced by graphoepitaxial effect on annealed M-plane sapphire substrates. The wires have a diameter of several hundred nanometers, with lengths up to several millimeters. Microstructure characterization shows that CsPbBr3 NWs are high-quality single crystals, with smooth surfaces and well-defined cross section. The NWs have very strong band-edge photoluminescence (PL) with a long PL lifetime of ∼25 ns and can realize high-quality optical waveguides. Photodetectors constructed on these individual NWs exhibit excellent photoresponse with an ultrahigh responsivity of 4400 A/W and a very fast response speed of 252 μs. This work presents an important step toward scalable growth of high-quality perovskite NWs, which will provide promising opportunities in constructing integrated nanophotonic and optoelectronic systems.
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Affiliation(s)
- Muhammad Shoaib
- Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, State Key Laboratory of Chemo/Biosensing and Chemometrics, and School of Physics and Electronic Science, Hunan University , Changsha 410082, China
| | - Xuehong Zhang
- Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, State Key Laboratory of Chemo/Biosensing and Chemometrics, and School of Physics and Electronic Science, Hunan University , Changsha 410082, China
| | - Xiaoxia Wang
- Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, State Key Laboratory of Chemo/Biosensing and Chemometrics, and School of Physics and Electronic Science, Hunan University , Changsha 410082, China
| | - Hong Zhou
- Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, State Key Laboratory of Chemo/Biosensing and Chemometrics, and School of Physics and Electronic Science, Hunan University , Changsha 410082, China
| | - Tao Xu
- SEU-FEI Nano-Pico Center, Key Lab of MEMS of Ministry of Education, Southeast University , Nanjing 210096, China
| | - Xiao Wang
- Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, State Key Laboratory of Chemo/Biosensing and Chemometrics, and School of Physics and Electronic Science, Hunan University , Changsha 410082, China
| | - Xuelu Hu
- Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, State Key Laboratory of Chemo/Biosensing and Chemometrics, and School of Physics and Electronic Science, Hunan University , Changsha 410082, China
| | - Huawei Liu
- Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, State Key Laboratory of Chemo/Biosensing and Chemometrics, and School of Physics and Electronic Science, Hunan University , Changsha 410082, China
| | - Xiaopeng Fan
- Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, State Key Laboratory of Chemo/Biosensing and Chemometrics, and School of Physics and Electronic Science, Hunan University , Changsha 410082, China
| | - Weihao Zheng
- Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, State Key Laboratory of Chemo/Biosensing and Chemometrics, and School of Physics and Electronic Science, Hunan University , Changsha 410082, China
| | - Tiefeng Yang
- Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, State Key Laboratory of Chemo/Biosensing and Chemometrics, and School of Physics and Electronic Science, Hunan University , Changsha 410082, China
| | - Shuzhen Yang
- Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, State Key Laboratory of Chemo/Biosensing and Chemometrics, and School of Physics and Electronic Science, Hunan University , Changsha 410082, China
| | - Qinglin Zhang
- Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, State Key Laboratory of Chemo/Biosensing and Chemometrics, and School of Physics and Electronic Science, Hunan University , Changsha 410082, China
| | - Xiaoli Zhu
- Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, State Key Laboratory of Chemo/Biosensing and Chemometrics, and School of Physics and Electronic Science, Hunan University , Changsha 410082, China
| | - Litao Sun
- SEU-FEI Nano-Pico Center, Key Lab of MEMS of Ministry of Education, Southeast University , Nanjing 210096, China
| | - Anlian Pan
- Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, State Key Laboratory of Chemo/Biosensing and Chemometrics, and School of Physics and Electronic Science, Hunan University , Changsha 410082, China
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Pyo S, Kim W, Jung HI, Choi J, Kim J. Heterogeneous Integration of Carbon-Nanotube-Graphene for High-Performance, Flexible, and Transparent Photodetectors. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2017; 13:1700918. [PMID: 28544754 DOI: 10.1002/smll.201700918] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2017] [Revised: 03/31/2017] [Indexed: 06/07/2023]
Abstract
Low-dimensional carbon materials, such as semiconducting carbon nanotubes (CNTs), conducting graphene, and their hybrids, are of great interest as promising candidates for flexible, foldable, and transparent electronics. However, the development of highly photoresponsive, flexible, and transparent optoelectronics still remains limited due to their low absorbance and fast recombination rate of photoexcited charges, despite the considerable potential of photodetectors for future wearable and foldable devices. This work demonstrates a heterogeneous, all-carbon photodetector composed of graphene electrodes and porphyrin-interfaced single-walled CNTs (SWNTs) channel, exhibiting high photoresponse, flexibility, and full transparency across the device. The porphyrin molecules generate and transfer photoexcited holes to the SWNTs even under weak white light, resulting in significant improvement of photoresponsivity from negligible to 1.6 × 10-2 A W-1 . Simultaneously, the photodetector exhibits high flexibility allowing stable light detection under ≈50% strain (i.e., a bending radius of ≈350 µm), and retaining a sufficient transparency of ≈80% at 550 nm. Experimental demonstrations as a wearable sunlight sensor highlight the utility of the photodetector that can be conformally mounted on human skin and other curved surfaces without any mechanical and optical constraints. The heterogeneous integration of porphyrin-SWNT-graphene may provide a viable route to produce invisible, high-performance optoelectronic systems.
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Affiliation(s)
- Soonjae Pyo
- School of Mechanical Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea
| | - Wondo Kim
- School of Mechanical Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea
| | - Han-Il Jung
- School of Mechanical Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea
| | - Jungwook Choi
- School of Mechanical Engineering, Yeungnam University, 280 Daehak-ro, Gyeongsan, Gyeongbuk, 38541, Republic of Korea
| | - Jongbaeg Kim
- School of Mechanical Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea
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Fleet LR, Stott J, Villis B, Din S, Serri M, Aeppli G, Heutz S, Nathan A. Self-Assembled Molecular Nanowires for High-Performance Organic Transistors. ACS APPLIED MATERIALS & INTERFACES 2017; 9:20686-20695. [PMID: 28547994 DOI: 10.1021/acsami.7b01449] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
While organic semiconductors provide tantalizing possibilities for low-cost, light-weight, flexible electronic devices, their current use in transistors-the fundamental building block-is rather limited as their speed and reliability are not competitive with those of their inorganic counterparts and are simply too poor for many practical applications. Through self-assembly, highly ordered nanostructures can be prepared that have more competitive transport characteristics; however, no simple, scalable method has been discovered that can produce devices on the basis of such nanostructures. Here, we show how transistors of self-assembled molecular nanowires can be fabricated using a scalable, gradient sublimation technique, which have dramatically improved characteristics compared to those of their thin-film counterparts, both in terms of performance and stability. Nanowire devices based on copper phthalocyanine have been fabricated with threshold voltages as low as -2.1 V, high on/off ratios of 105, small subthreshold swings of 0.9 V/decade, and mobilities of 0.6 cm2/V s, and lower trap energies as deduced from temperature-dependent properties, in line with leading organic semiconductors involving more complex fabrication. High-performance transistors manufactured using our scalable deposition technique, compatible with flexible substrates, could enable integrated all-organic chips implementing conventional as well as neuromorphic computation and combining sensors, logic, data storage, drivers, and displays.
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Affiliation(s)
| | - James Stott
- London Centre for Nanotechnology, University College London , London WC1H 0AH, U.K
| | - Byron Villis
- London Centre for Nanotechnology, University College London , London WC1H 0AH, U.K
| | | | | | - Gabriel Aeppli
- Department of Physics, ETH Zürich , Zürich CH-8093, Switzerland
- Department of Physics, École Polytechnique Fédérale de Lausanne (EPFL) , Lausanne CH-1015, Switzerland
- Photon Science Division, Paul Scherrer Institute , Villigen CH-5232, Switzerland
| | | | - Arokia Nathan
- London Centre for Nanotechnology, University College London , London WC1H 0AH, U.K
- Electrical Engineering Division, Department of Engineering, Cambridge University , Cambridge, U.K
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13
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Arefpour M, Kashi MA, Ramazani A, Montazer AH. Electrochemical pore filling strategy for controlled growth of magnetic and metallic nanowire arrays with large area uniformity. NANOTECHNOLOGY 2016; 27:275605. [PMID: 27248861 DOI: 10.1088/0957-4484/27/27/275605] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
While a variety of template-based strategies have been developed in the fabrication of nanowires (NWs), a uniform pore filling across the template still poses a major challenge. Here, we present a large area controlled pore filling strategy in the reproducible fabrication of various magnetic and metallic NW arrays, embedded inside anodic aluminum oxide templates. Using a diffusive pulsed electrodeposition (DPED) technique, this versatile strategy relies on the optimized filling of branched nanopores at the bottom of templates with Cu. Serving the Cu filled nanopores as appropriate nucleation sites, the DPED is followed by a uniform and homogeneous deposition of magnetic (Ni and Fe) and metallic (Cu and Zn) NWs at a current density of 50 mA cm-2 for an optimal thickness of alumina barrier layer (∼18 nm). Our strategy provides large area uniformity (exceeding 400 μm2) in the fabrication of 16 μm long free-standing NW arrays. Using hysteresis loop measurements and scanning electron microscopy images, the electrodeposition efficiency (EE) and pore filling percentage (F p) are evaluated, leading to maximum EE and F p values of 91% and 95% for Ni and Zn, respectively. Moreover, the resulting NW arrays are found to be highly crystalline. Accordingly, the DPED technique is capable of cheaply and efficiently controlling NW growth over a large area, providing a tool for various nanoscale applications including biomedical devices, electronics, photonics, magnetic storage medium and nanomagnet computing.
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Affiliation(s)
- M Arefpour
- Institute of Nanoscience and Nanotechnology, University of Kashan, Kashan 87317-51167, Iran
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14
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Peng F, Qin SJ, Hu LF, Wang JY, Yang JM, Chen XQ, Pan GB. Electrochemical fabrication and optoelectronic properties of hybrid heterostructure of CuPc/porous GaN. Chem Phys Lett 2016. [DOI: 10.1016/j.cplett.2016.04.024] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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15
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Zhang X, Jie J, Deng W, Shang Q, Wang J, Wang H, Chen X, Zhang X. Alignment and Patterning of Ordered Small-Molecule Organic Semiconductor Micro-/Nanocrystals for Device Applications. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2016; 28:2475-503. [PMID: 26813697 DOI: 10.1002/adma.201504206] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2015] [Revised: 10/20/2015] [Indexed: 05/28/2023]
Abstract
Large-area alignment and patterning of small-molecule organic semiconductor micro-/nanocrystals (SMOSNs) at desired locations is a prerequisite for their practical device applications. Recent strategies for alignment and patterning of ordered SMOSNs and their corresponding device applications are highlighted.
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Affiliation(s)
- Xiujuan Zhang
- Institute of Functional Nano & Soft Materials (FUNSOM), Collaborative Innovation Center of Suzhou Nano Science and Technology (NANO-CIC), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou Jiangsu, 215123, P. R. China
| | - Jiansheng Jie
- Institute of Functional Nano & Soft Materials (FUNSOM), Collaborative Innovation Center of Suzhou Nano Science and Technology (NANO-CIC), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou Jiangsu, 215123, P. R. China
| | - Wei Deng
- Institute of Functional Nano & Soft Materials (FUNSOM), Collaborative Innovation Center of Suzhou Nano Science and Technology (NANO-CIC), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou Jiangsu, 215123, P. R. China
| | - Qixun Shang
- Institute of Functional Nano & Soft Materials (FUNSOM), Collaborative Innovation Center of Suzhou Nano Science and Technology (NANO-CIC), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou Jiangsu, 215123, P. R. China
| | - Jincheng Wang
- Institute of Functional Nano & Soft Materials (FUNSOM), Collaborative Innovation Center of Suzhou Nano Science and Technology (NANO-CIC), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou Jiangsu, 215123, P. R. China
| | - Hui Wang
- Institute of Functional Nano & Soft Materials (FUNSOM), Collaborative Innovation Center of Suzhou Nano Science and Technology (NANO-CIC), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou Jiangsu, 215123, P. R. China
| | - Xianfeng Chen
- School of Chemistry and Forensic Sciences, Faculty of Life Sciences, University of Bradford, United Kingdom, BD7 1DP
| | - Xiaohong Zhang
- Institute of Functional Nano & Soft Materials (FUNSOM), Collaborative Innovation Center of Suzhou Nano Science and Technology (NANO-CIC), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou Jiangsu, 215123, P. R. China
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16
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Porphyrin-Based Nanostructures for Photocatalytic Applications. NANOMATERIALS 2016; 6:nano6030051. [PMID: 28344308 PMCID: PMC5302509 DOI: 10.3390/nano6030051] [Citation(s) in RCA: 91] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/24/2016] [Revised: 03/14/2016] [Accepted: 03/16/2016] [Indexed: 12/20/2022]
Abstract
Well-defined organic nanostructures with controllable size and morphology are increasingly exploited in optoelectronic devices. As promising building blocks, porphyrins have demonstrated great potentials in visible-light photocatalytic applications, because of their electrical, optical and catalytic properties. From this perspective, we have summarized the recent significant advances on the design and photocatalytic applications of porphyrin-based nanostructures. The rational strategies, such as texture or crystal modification and interfacial heterostructuring, are described. The applications of the porphyrin-based nanostructures in photocatalytic pollutant degradation and hydrogen evolution are presented. Finally, the ongoing challenges and opportunities for the future development of porphyrin nanostructures in high-quality nanodevices are also proposed.
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17
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Zeng Y, Pan X, Lu B, Ye Z. Fabrication of flexible self-powered UV detectors based on ZnO nanowires and the enhancement by the decoration of Ag nanoparticles. RSC Adv 2016. [DOI: 10.1039/c6ra02922a] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The flexible self-powered UV detector based on ZnO NWs shows good performance both in flat and bending conditions.
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Affiliation(s)
- Yiyu Zeng
- State Key Laboratory of Silicon Materials
- Cyrus Tang Center for Sensor Materials and Applications
- School of Materials Science and Engineering
- Zhejiang University
- Hangzhou 310027
| | - Xinhua Pan
- State Key Laboratory of Silicon Materials
- Cyrus Tang Center for Sensor Materials and Applications
- School of Materials Science and Engineering
- Zhejiang University
- Hangzhou 310027
| | - Bin Lu
- State Key Laboratory of Silicon Materials
- Cyrus Tang Center for Sensor Materials and Applications
- School of Materials Science and Engineering
- Zhejiang University
- Hangzhou 310027
| | - Zhizhen Ye
- State Key Laboratory of Silicon Materials
- Cyrus Tang Center for Sensor Materials and Applications
- School of Materials Science and Engineering
- Zhejiang University
- Hangzhou 310027
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18
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Pan H, Zhang X, Yang Y, Shao Z, Deng W, Ding K, Zhang Y, Jie J. Patterned growth of single-crystal 3, 4, 9, 10-perylenetetracarboxylic dianhydride nanowire arrays for field-emission and optoelectronic devices. NANOTECHNOLOGY 2015; 26:295302. [PMID: 26135069 DOI: 10.1088/0957-4484/26/29/295302] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
3, 4, 9, 10-perylenetetracarboxylic dianhydride (PTCDA) organic nanostructures possess extraordinary electronic and optoelectronic properties. However, it remains a challenge to achieve patterned growth of PTCDA nanowire (NW) arrays for integrated device applications. Here, we demonstrated the high-density, large-area, uniform, and cross-aligned growth of single-crystalline PTCDA NW arrays by using Au nanoparticles (NPs) as the growth templates. The high surface energy of Au NPs led to the cross-aligned growth of organic NWs, enabling the growth of PTCDA NW arrays with any desirable patterns by pre-patterning the Au films on a Si substrate. The PTCDA NW arrays as field emitters show good performance with a large emission current density and high emission stability. Furthermore, photodetectors based on PTCDA NW arrays were constructed via a simple in-situ growth approach, which exhibited high sensitivity to a wideband light ranging from 400-800 nm and surpassed the individual NW-based photodetectors in terms of higher photocurrent and faster response speed. Successful applications of PTCDA NW arrays in field emission and photodetectors show a great potential application of organic NW arrays in future efficient electronic and optoelectronic devices.
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Affiliation(s)
- Huanhuan Pan
- Institute of Functional Nano and Soft Materials (FUNSOM) and Collaborative Innovation Center of Suzhou Nano Science and Technology, Jiangsu Key Laboratory for Carbon Based Functional Materials and Devices, Soochow University, Suzhou, Jiangsu 215123, People's Republic of China
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19
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Zhang L, Li H, Wei J, Li K, Fu Q, Shen Q. Template-free Hydrothermal Synthesis of Copper Phthalocyanine Nanobelts. CHEM LETT 2015. [DOI: 10.1246/cl.150016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Lijuan Zhang
- State Key Laboratory of Solidification Processing, Carbon/Carbon Composites Research Center, Northwestern Polytechnical University
| | - Hejun Li
- State Key Laboratory of Solidification Processing, Carbon/Carbon Composites Research Center, Northwestern Polytechnical University
| | - Jianfeng Wei
- State Key Laboratory of Solidification Processing, Carbon/Carbon Composites Research Center, Northwestern Polytechnical University
| | - Kezhi Li
- State Key Laboratory of Solidification Processing, Carbon/Carbon Composites Research Center, Northwestern Polytechnical University
| | - Qiangang Fu
- State Key Laboratory of Solidification Processing, Carbon/Carbon Composites Research Center, Northwestern Polytechnical University
| | - Qingliang Shen
- State Key Laboratory of Solidification Processing, Carbon/Carbon Composites Research Center, Northwestern Polytechnical University
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20
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Abstract
This review summarizes the latest research for exploiting the flexible electronic applications of inorganic nanowires.
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Affiliation(s)
- Zhe Liu
- State Key Laboratory for Superlattices and Microstructures
- Institute of Semiconductor
- Chinese Academy of Sciences
- Beijing 100083
- China
| | - Jing Xu
- State Key Laboratory for Superlattices and Microstructures
- Institute of Semiconductor
- Chinese Academy of Sciences
- Beijing 100083
- China
| | - Di Chen
- School of Mathematics and Physics
- University of Science and Technology Beijing
- Beijing 100083
- China
| | - Guozhen Shen
- State Key Laboratory for Superlattices and Microstructures
- Institute of Semiconductor
- Chinese Academy of Sciences
- Beijing 100083
- China
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21
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Chen SP, Durán Retamal JR, Lien DH, He JH, Liao YC. Inkjet-printed transparent nanowire thin film features for UV photodetectors. RSC Adv 2015. [DOI: 10.1039/c5ra12617g] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Stable nanowire suspensions are inkjet-printed to form the all-printed transparent UV photodetectors with fast responses.
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Affiliation(s)
- Shih-Pin Chen
- Department of Chemical Engineering
- National Taiwan University
- Taipei
- Taiwan
| | - José Ramón Durán Retamal
- Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
- King Abdullah University of Science and Technology (KAUST)
- Jeddah
- Saudi Arabia
| | - Der-Hsien Lien
- Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
- King Abdullah University of Science and Technology (KAUST)
- Jeddah
- Saudi Arabia
| | - Jr-Hau He
- Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
- King Abdullah University of Science and Technology (KAUST)
- Jeddah
- Saudi Arabia
| | - Ying-Chih Liao
- Department of Chemical Engineering
- National Taiwan University
- Taipei
- Taiwan
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22
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Gong C, Deng W, Zou B, Xing Y, Zhang X, Zhang X, Jie J. Large-scale assembly of organic micro/nanocrystals into highly ordered patterns and their applications for strain sensors. ACS APPLIED MATERIALS & INTERFACES 2014; 6:11018-11024. [PMID: 24988146 DOI: 10.1021/am502060y] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Large-scale assembly of zero-dimensional (0-D) organic nano/microcrystals into desired patterns is essential to their applications. However, current methods can hardly apply to the 0D organic crystals because of their relatively large sizes and polyhedral structures. Here, we demonstrate a facile and convenient way to assemble organic single crystals into large-area two-dimensional (2D) structures by application of appropriate electric field (EF). The ordering of the 2D structure depends on the frequency and field strength of the external electric field. Furthermore, lithographically patterning electrodes offer an efficient way to assemble the crystals into controllable patterns. By tuning the electrode pattern geometry, various desirable patterns with variable microstructures can be achieved. These formed superstructures and patterns can be fixed on the electrodes through exerting an external direct current, which allows for the further utilization of the patterns. With assistance of adhesive tape, patterns could be transferred onto flexible substrates for constructing a highly sensitive strain sensor. This strategy is applicable to nonsphere organic crystals with different sizes to assemble at desired positions and construct highly ordered arrays in a large scale, which opens new possibilities of organic microcrystals application in new-generation electronic devices and sensors.
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Affiliation(s)
- Chao Gong
- Institute of Functional Nano & Soft Materials (FUNSOM) & Collaborative Innovation Center of Suzhou Nano Science and Technology, Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University , Suzhou, Jiangsu 215123, P. R. China
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23
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In-situ device integration of large-area patterned organic nanowire arrays for high-performance optical sensors. Sci Rep 2013; 3:3248. [PMID: 24287887 PMCID: PMC3843168 DOI: 10.1038/srep03248] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2013] [Accepted: 11/01/2013] [Indexed: 11/08/2022] Open
Abstract
Single-crystalline organic nanowires (NWs) are important building blocks for future low-cost and efficient nano-optoelectronic devices due to their extraordinary properties. However, it remains a critical challenge to achieve large-scale organic NW array assembly and device integration. Herein, we demonstrate a feasible one-step method for large-area patterned growth of cross-aligned single-crystalline organic NW arrays and their in-situ device integration for optical image sensors. The integrated image sensor circuitry contained a 10 × 10 pixel array in an area of 1.3 × 1.3 mm(2), showing high spatial resolution, excellent stability and reproducibility. More importantly, 100% of the pixels successfully operated at a high response speed and relatively small pixel-to-pixel variation. The high yield and high spatial resolution of the operational pixels, along with the high integration level of the device, clearly demonstrate the great potential of the one-step organic NW array growth and device construction approach for large-scale optoelectronic device integration.
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24
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Wu Y, Zhang X, Pan H, Zhang X, Zhang Y, Zhang X, Jie J. Large-area aligned growth of single-crystalline organic nanowire arrays for high-performance photodetectors. NANOTECHNOLOGY 2013; 24:355201. [PMID: 23917374 DOI: 10.1088/0957-4484/24/35/355201] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Due to their extraordinary properties, single-crystalline organic nanowires (NWs) are important building blocks for future low-cost and efficient nano-optoelectronic devices. However, it remains a critical challenge to assemble organic NWs rationally in an orientation-, dimensionality- and location-controlled manner. Herein, we demonstrate a feasible method for aligned growth of single-crystalline copper phthalocyanine (CuPc) NW arrays with high density, large-area uniformity and perfect crossed alignment by using Au film as a template. The growth process was investigated in detail. The Au film was found to have a critical function in the aligned growth of NWs, but may only serve as the active site for NW nucleation because of the large surface energy, as well as direct the subsequent aligned growth. The as-prepared NWs were then transferred to construct single NW-based photoconductive devices, which demonstrated excellent photoresponse properties with robust stability and reproducibility; the device showed a high switching ratio of ∼180, a fast response speed of ∼100 ms and could stand continuous operation up to 2 h. Importantly, this strategy can be extended to other organic molecules for their synthesis of NW arrays, revealing great potential for use in the construction of large-scale high-performance functional nano-optoelectronic devices.
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Affiliation(s)
- Yiming Wu
- Institute of Functional Nano and Soft Materials-FUNSOM and Jiangsu Key Laboratory for Carbon Based Functional Materials and Devices, Soochow University, Suzhou, Jiangsu 215123, People's Republic of China
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25
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Bao RR, Zhang CY, Zhang XJ, Ou XM, Lee CS, Jie JS, Zhang XH. Self-assembly and hierarchical patterning of aligned organic nanowire arrays by solvent evaporation on substrates with patterned wettability. ACS APPLIED MATERIALS & INTERFACES 2013; 5:5757-5762. [PMID: 23742204 DOI: 10.1021/am4012885] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The controlled growth and alignment of one-dimensional organic nanostructures at well-defined locations considerably hinders the integration of nanostructures for electronic and optoelectronic applications. Here, we demonstrate a simple process to achieve the growth, alignment, and hierarchical patterning of organic nanowires on substrates with controlled patterns of surface wettability. The first-level pattern is confined by the substrate patterns of wettability. Organic nanostructures are preferentially grown on solvent wettable regions. The second-level pattern is the patterning of aligned organic nanowires deposited by controlling the shape and movement of the solution contact lines during evaporation on the wettable regions. This process is controlled by the cover-hat-controlled method or vertical evaportation method. Therefore, various new patterns of organic nanostructures can be obtained by combing these two levels of patterns. This simple method proves to be a general approach that can be applied to other organic nanostructure systems. Using the as-prepared patterned nanowire arrays, an optoelectronic device (photodetector) is easily fabricated. Hence, the proposed simple, large-scale, low-cost method of preparing patterns of highly ordered organic nanostructures has high potential applications in various electronic and optoelectronic devices.
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Affiliation(s)
- Rong-Rong Bao
- Nano-organic Photoelectronic Laboratory and Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
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26
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Gao Z, Jin W, Zhou Y, Dai Y, Yu B, Liu C, Xu W, Li Y, Peng H, Liu Z, Dai L. Self-powered flexible and transparent photovoltaic detectors based on CdSe nanobelt/graphene Schottky junctions. NANOSCALE 2013; 5:5576-5581. [PMID: 23681339 DOI: 10.1039/c3nr34335a] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Flexible and transparent electronic and optoelectronic devices have attracted more and more research interest due to their potential applications in developing portable, wearable, low-cost, and implantable devices. We have fabricated and studied high-performance flexible and transparent CdSe nanobelt (NB)/graphene Schottky junction self-powered photovoltaic detectors for the first time. Under 633 nm light illumination, typical photosensitivity and responsivity of the devices are about 1.2 × 10(5) and 8.7 A W(-1), respectively. Under 3500 Hz switching frequency, the response and recovery times of them are about 70 and 137 μs, respectively, which, to the best of our knowledge, are the best reported values for nanomaterial based Schottky junction photodetectors up to date. The detailed properties of the photodetectors, such as the influences of incident light wavelength and light intensity on the external quantum efficiency and speed, are also investigated. Detailed discussions are made in order to understand the observed phenomena. Our work demonstrates that the self-powered flexible and transparent CdSe NB/graphene Schottky junction photovoltaic detectors have a bright application prospect.
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Affiliation(s)
- Zhiwei Gao
- State Key Lab for Mesoscopic Physics and School of Physics, Peking University, Beijing, 100871, China
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27
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Suzuki T, Okamoto T, Saeki A, Seki S, Sato H, Matsuo Y. Formation of photoconductive nanowires of tetracene derivative in composite thin film. ACS APPLIED MATERIALS & INTERFACES 2013; 5:1937-1942. [PMID: 23438387 DOI: 10.1021/am302914w] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Nanowires of tetracene dicarboxylic imide disulfide with an N-hexyl substituent (HexylTIDS) were successfully constructed in composite thin film containing poly(3-hexylthiophene) (P3HT). The nanowire structures were investigated by atomic force microscopy and scanning electron microscopy. The photoconductivity of the composite films was evaluated by time-resolved microwave conductivity measurements, revealing that the film containing a 1:1 w/w ratio of HexylTIDS and P3HT exhibited the highest photoconductivity (2.1 × 10(-7) m(2)/(V s)). The intermolecular interactions of HexylTIDS molecules were important in nanowire formation. These results suggest a one-step method for fabricating small-molecule-based nanowires in composite films from a blended solution. This type of composite film, and its fabrication method, will be useful for developing organic thin-film photoelectronic devices.
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Affiliation(s)
- Tsuyoshi Suzuki
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Tokyo 113-0033, Japan
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