1
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Liu Z, Dong H, Chen Z, Wang L. Tunable evaporation-induced surface morphologies on chitosan film for light management. Int J Biol Macromol 2024; 264:130800. [PMID: 38548501 DOI: 10.1016/j.ijbiomac.2024.130800] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2023] [Revised: 02/26/2024] [Accepted: 03/09/2024] [Indexed: 04/10/2024]
Abstract
The surface morphologies of polymer films have been used to improve the performance or enable new applications of films, such as controllable adhesion, shape morphing and light management. However, complicated and destructive methods were applied to produce surface morphologies on chitosan (CS) film. To overcome this challenge, we report an evaporation-induced self-assembly to form the tunable morphologies on the surface of short-chain chitosan film by varying the evaporation rates that influence the aggregation behavior of polymer chains between order and disorder. It enables the simple, tunable and scalable fabrication of surface morphologies on CS film (CS solution concentration: 2 wt%, drying from room temperature (RT) to 80 °C) that provides controllable haze (3-74 %) and high transmittance (>85 %) for the production of hazy and transparent window coatings. This simple approach to producing tunable surface morphologies could inspire the synthesis of multifunctional polymer films with different surface structures, whose applications can be extended to cell culture interfaces, flexible bioelectronic and optoelectronic devices.
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Affiliation(s)
- Zhongqi Liu
- College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China; Key Laboratory of Coastal Environment and Resources of Zhejiang Province, School of Engineering, Westlake University, Hangzhou 310024, China
| | - Han Dong
- Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China
| | - Zhong Chen
- Instrumentation and Service Center for Molecular Sciences, Westlake University, Hangzhou 310024, China
| | - Lei Wang
- Key Laboratory of Coastal Environment and Resources of Zhejiang Province, School of Engineering, Westlake University, Hangzhou 310024, China; Research Center for Industries of the Future, Westlake University, Hangzhou 310030, China; Institute of Advanced Technology, Westlake Institute for Advanced Study, Hangzhou 310024, China.
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2
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Mei Y, Gu P, Yang S, Ying L, Zhang B. Optically pumped flexible GaN-based ultraviolet VCSELs. OPTICS LETTERS 2024; 49:1816-1819. [PMID: 38560872 DOI: 10.1364/ol.517756] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2024] [Accepted: 03/01/2024] [Indexed: 04/04/2024]
Abstract
Flexible optoelectronic platforms, which integrate optoelectronic devices on a flexible substrate, are promising in more complex working environments benefiting from the mechanical flexibility. Herein, for the first time to the best of our knowledge, a flexible GaN-based vertical cavity surface-emitting laser (VCSEL) in the ultraviolet A (UVA) range was demonstrated by using a thin-film transfer process based on laser lift-off (LLO) and spin-coating of a flexible substrate. The lasing wavelength is 376.5 nm with a linewidth of 0.6 nm and threshold energy of 98.4 nJ/pulse, corresponding to a threshold energy density of 13.9 mJ/cm2. The flexible substrate in this study is directly formed by spin-coating of photosensitive epoxy resin, which is much simplified and cost-effective, and a 2-in. wafer scale GaN-based membrane can be successfully transferred to a flexible substrate through this method. Such flexible UVA VCSELs are promising for the development of next-generation flexible and wearable technologies.
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3
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Hou CF, Tsui WA, Chou RJ, Hsu CH, Feria DN, Lin TY, Chen YF. Speckle-Free, Angle-Free, Cavity-Free White Laser with a High Color Rendering Index. ACS APPLIED MATERIALS & INTERFACES 2024; 16:11489-11496. [PMID: 38393972 PMCID: PMC10921373 DOI: 10.1021/acsami.3c17222] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Revised: 02/03/2024] [Accepted: 02/08/2024] [Indexed: 02/25/2024]
Abstract
The freedom from efficiency droop motivates monochromatic lasers to progress in general lighting applications due to the demand for more efficient and sustainable light sources. Still, a white light based on monochromatic lasers with high lighting quality, such as a high color rendering ability, an angle-independent output, and a speckle-free illumination, has not yet been fabricated nor demonstrated. Random lasers, with the special mechanism caused by multiple scattering, the angle-free emission, and the uncomplicated fabrication processes, inspire us to investigate the feasibility of utilizing them in general lighting. In this work, a white random laser with a high color rendering index (CRI) value, regardless of pumping energy and observing direction, was performed and discussed. We also investigated the stability of white RL as its CIE chromaticity coordinates exhibit negligible differences with increasing pump energy density, retaining its high-CRI measurement. Also, it exhibits angle-independent emission while having a high color rendering ability. After passing through a scattering film, it generated no speckles compared to the conventional laser. We demonstrated the advances in white laser illumination, showing that a white random laser is promising to be applied for high-brightness illumination, biological-friendly lighting, accurate color selections, and medical sensing.
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Affiliation(s)
- Cheng-Fu Hou
- Department
of Physics, National Taiwan University, Taipei 10617, Taiwan
| | - Wei-An Tsui
- Department
of Optoelectronics and Materials Technology, National Taiwan Ocean University, Keelung City 202301, Taiwan
| | - Rou-Jun Chou
- Department
of Physics, National Taiwan University, Taipei 10617, Taiwan
| | - Chih-Hao Hsu
- Department
of Optoelectronics and Materials Technology, National Taiwan Ocean University, Keelung City 202301, Taiwan
| | - Denice N. Feria
- Department
of Optoelectronics and Materials Technology, National Taiwan Ocean University, Keelung City 202301, Taiwan
| | - Tai-Yuan Lin
- Department
of Optoelectronics and Materials Technology, National Taiwan Ocean University, Keelung City 202301, Taiwan
| | - Yang-Fang Chen
- Department
of Physics, National Taiwan University, Taipei 10617, Taiwan
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4
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Cabriolu R, Dungan S, Ballone P. Light propagation in two-dimensional and three-dimensional slabs of reflective colloidal particles in solution: The effect of interfaces and interparticle correlations. Phys Rev E 2024; 109:014615. [PMID: 38366414 DOI: 10.1103/physreve.109.014615] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2023] [Accepted: 12/21/2023] [Indexed: 02/18/2024]
Abstract
The propagation of light across 2D and 3D slabs of reflective colloidal particles in a fluidlike state has been investigated by simulation. The colloids are represented as hard spheres with and without an attractive square-well tail. Representative configurations of particles have been generated by Monte Carlo. The path of rays entering the slab normal to its planar surface has been determined by exact geometric scattering conditions, assuming that particles are macroscopic spheres fully reflective at the surface of their hard-core potential. The analysis of light paths provides the transmission and reflection coefficients, the mean-free path, the average length of transmitted and reflected paths, the distribution of scattering events across the slab, the angular spread of the outcoming rays as a function of dimensionality, and thermodynamic state. The results highlight the presence of a sizable population of very long paths, which play an important role in random lasing from solutions of metal particles in an optically active fluid. The output power spectrum resulting from the stimulated emission amplification decays asymptotically as an inverse power law. The present study goes beyond the standard approach based on a random walk confined between two planar interfaces and parametrized in terms of the mean-free path and scattering matrix. Here, instead, the mean-free path, the correlation among scattering events, and memory effects are not assumed a priori, but emerge from the underlying statistical mechanics model of interacting particles. In this way the dependence of properties on the thermodynamic state, the effect of particle-particle and particle-interface correlations and of spatial inhomogeneity, and memory effects are accounted for in a transparent way. Moreover, the approach joins smoothly the ballistic regime of light propagation at low density with the diffusive regime at high density of scattering centers. These properties are exploited to investigate the effect of weak polydispersivity and of large density fluctuations at the critical point of the model with the attractive potential tail.
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Affiliation(s)
- Raffaela Cabriolu
- Department of Physics, Norwegian University of Science and Technology (NTNU), 7491 Trondheim, Norway
| | - Sarah Dungan
- School of Physics, University College Dublin, Dublin 4, Ireland
| | - Pietro Ballone
- School of Physics, University College Dublin, Dublin 4, Ireland
- Conway Institute for Biomolecular and Biomedical Research, University College Dublin, Dublin 4, Ireland
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5
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Gayathri R, Suchand Sandeep CS, Vijayan C, Murukeshan VM. Lasing from Micro- and Nano-Scale Photonic Disordered Structures for Biomedical Applications. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:2466. [PMID: 37686974 PMCID: PMC10490388 DOI: 10.3390/nano13172466] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Revised: 08/24/2023] [Accepted: 08/29/2023] [Indexed: 09/10/2023]
Abstract
A disordered photonic medium is one in which scatterers are distributed randomly. Light entering such media experiences multiple scattering events, resulting in a "random walk"-like propagation. Micro- and nano-scale structured disordered photonic media offer platforms for enhanced light-matter interaction, and in the presence of an appropriate gain medium, coherence-tunable, quasi-monochromatic lasing emission known as random lasing can be obtained. This paper discusses the fundamental physics of light propagation in micro- and nano-scale disordered structures leading to the random lasing phenomenon and related aspects. It then provides a state-of-the-art review of this topic, with special attention to recent advancements of such random lasers and their potential biomedical imaging and biosensing applications.
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Affiliation(s)
- R. Gayathri
- Centre for Optical and Laser Engineering, School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore; (R.G.); (C.S.S.S.)
| | - C. S. Suchand Sandeep
- Centre for Optical and Laser Engineering, School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore; (R.G.); (C.S.S.S.)
| | - C. Vijayan
- Department of Physics, Indian Institute of Technology Madras, Chennai 600036, India
| | - V. M. Murukeshan
- Centre for Optical and Laser Engineering, School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore; (R.G.); (C.S.S.S.)
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6
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Rhee D, Han B, Jung M, Kim J, Song O, Kang J. Hierarchical Nanoscale Structuring of Solution-Processed 2D van der Waals Networks for Wafer-Scale, Stretchable Electronics. ACS APPLIED MATERIALS & INTERFACES 2022; 14:57153-57164. [PMID: 36519946 DOI: 10.1021/acsami.2c16738] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Two-dimensional (2D) semiconductors are promising for next-generation electronics that are lightweight, flexible, and stretchable. Achieving stretchability with suppressed crack formation, however, is still difficult without introducing lithographically etched micropatterns, which significantly reduces active device areas. Herein, we report a solution-based hierarchical structuring to create stretchable semiconducting films that are continuous over wafer-scale areas via self-assembly of two-dimensional nanosheets. Electrochemically exfoliated MoS2 nanosheets with large lateral sizes (∼1 μm) are first assembled into a uniform film on a prestrained thermoplastic substrate, followed by strain relief of the substrate to create nanoscale wrinkles. Subsequent strain-relief cycles with the presence of soluble polymer films produce hierarchical wrinkles with multigenerational structures. Stretchable MoS2 films are then realized by curing an elastomer directly on the wrinkled surface and dissolving the thermoplastic. Three-generation hierarchical MoS2 wrinkles are resistant to cracking up to nearly 100% substrate stretching and achieve drastically enhanced photoresponsivity compared to the flat counterpart over the visible and NIR regimes, while the flat MoS2 film is beneficial in creating strain sensors because of its strain-dependent electrical response.
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Affiliation(s)
- Dongjoon Rhee
- School of Advanced Materials Science and Engineering, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea
| | - Boyun Han
- School of Advanced Materials Science and Engineering, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea
| | - Myeongjin Jung
- School of Advanced Materials Science and Engineering, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea
| | - Jihyun Kim
- School of Advanced Materials Science and Engineering, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea
| | - Okin Song
- School of Advanced Materials Science and Engineering, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea
| | - Joohoon Kang
- School of Advanced Materials Science and Engineering, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea
- KIST-SKKU Carbon-Neutral Research Center, SKKU, Suwon 16419, Republic of Korea
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7
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Shang Z, Wang Z, Dai G. Stability-Enhanced Emission Based on Biophotonic Crystals in Liquid Crystal Random Lasers. MATERIALS (BASEL, SWITZERLAND) 2022; 16:200. [PMID: 36614542 PMCID: PMC9821741 DOI: 10.3390/ma16010200] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Revised: 12/15/2022] [Accepted: 12/20/2022] [Indexed: 06/17/2023]
Abstract
A new design of a bio-random laser based on a butterfly wing structure and ITO glass is proposed in this article. Firstly, the butterfly wing structure was integrated in a liquid crystal cell made of ITO glass. The integrated liquid crystal cell was injected with liquid crystal and dye to obtain a bio-random laser. A non-biological random laser was obtained with a capillary glass tube, liquid crystal and dye. The excitation spectra and thresholds were recorded to evaluate the performance of the biological and non-biological random lasers. The results show that the excitation performance stability of the bio-random laser is improved and the number of spikes in the spectra is reduced compared with the non-biological random laser. Finally, the equivalent cavity length of the biological and non-biological random lasers was compared and the optical field distribution inside the butterfly wing structure was analyzed. The data show that the improvement of the excitation performance stability of the bio-random laser is related to the localization of the optical field induced by the photonic crystal structure in the butterfly wing.
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Affiliation(s)
- Zhenzhen Shang
- Tropical Biodiversity and Bioresource Utilization Laboratory, Qiongtai Normal University, Haikou 571127, China
| | - Zhi Wang
- School of Physics, Beijing Institute of Technology, Beijing 100081, China
| | - Guang Dai
- College of Science, Tianjin University of Technology, Tianjin 300384, China
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8
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Wang L, Yang M, Zhang S, Niu C, Lv Y. Perovskite Random Lasers, Process and Prospects. MICROMACHINES 2022; 13:2040. [PMID: 36557338 PMCID: PMC9783485 DOI: 10.3390/mi13122040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Revised: 11/11/2022] [Accepted: 11/14/2022] [Indexed: 06/17/2023]
Abstract
Random lasers (RLs) are a kind of coherent light source with optical feedback based on disorder-induced multiple scattering effects instead of a specific cavity. The unique feedback mechanism makes RLs different from conventional lasers. They have the advantages of small volume, flexible shape, omnidirectional emission, etc., and have broad application prospects in the fields of laser illumination, speckle-free imaging, display, and sensing. Colloidal metal-halide perovskite nanomaterials are a hot research field in light sources. They have been considered as desired gain media owing to their superior properties, such as high photoluminescence, tunable emission wavelengths, and easy fabrication processes. In this review, we summarize the research progress of RLs based on perovskite nanomaterials. We first present the evolution of the RLs based on the perovskite quantum dots (QDs) and perovskite films. The fabrication process of perovskite nano-/microstructures and lasers is discussed in detail. After that, the frontier applications of perovskite RLs are discussed. Finally, the challenges are discussed, and the prospects for further development are proposed.
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Affiliation(s)
| | | | | | | | - Yong Lv
- Correspondence: (L.W.); (Y.L.)
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9
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Ma C, Zhang Y, Jiao S, Liu M. Snap-through of graphene nanowrinkles under out-of-plane compression. NANOTECHNOLOGY 2022; 34:015705. [PMID: 36137514 DOI: 10.1088/1361-6528/ac9418] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Accepted: 09/20/2022] [Indexed: 06/16/2023]
Abstract
Nanowrinkles (i.e. the buckled nanoribbons) are widely observed in nano-devices assembled by two-dimensional (2D) materials. The existence of nanowrinkles significantly affects the physical (such as mechanical, electrical and thermal) properties of 2D materials, and thus further, impedes the applications of those devices. In this paper, we take the nanowrinkle formed in a monolayer graphene as a model system to study its deformation behaviours, especially the configuration evolution and the snap-through buckling instabilities, when subjected to the out-of-plane compression. By performing molecular dynamics simulation, the graphene nanowrinkles with or without self-adhesion (which are notated as 'clipped' state or 'bump' state, respectively) are obtained depending on the geometric size and the applied axial compressive pre-strain. The elastica theory is employed to quantify the shape of 'bump' nanowrinkles, as well as the critical condition of the transition between 'clipped' and 'bump' states. By applying out-of-plane compression to the generated graphene nanowrinkle, it flips to an opposite configuration via snap-through buckling. We identify four different buckling modes according to the configuration evolution. An unified phase diagram is constructed to describe those buckling modes. For the cases with negligible van der Waals interaction getting involved in the snap-buckling process, i.e. without self-adhesion, the force-displacement curves for nanowrinkles with same axial pre-strain but different sizes can be scaled to collapse. Moreover, the critical buckling loads can also be scaled and predicted by the extended elastica theory. Otherwise, for the cases with self-adhesion, which corresponds to the greater axial pre-strain, the van der Waals interaction makes the scaling collapse break down. It is expected that the analysis about the snap-through buckling of graphene nanowrinkles reported in this work will advance the understanding of the mechanical behaviours of wrinkled 2D materials and promote the design of functional nanodevices, such as nanomechanical resonators and capacitors.
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Affiliation(s)
- Chengpeng Ma
- Shanghai Key Laboratory of Mechanics in Energy Engineering, Shanghai Institute of Applied Mathematics and Mechanics, School of Mechanics and Engineering Science, Shanghai University, Shanghai 200444, People's Republic of China
| | - Yingchao Zhang
- School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
| | - Shuping Jiao
- Shanghai Key Laboratory of Mechanics in Energy Engineering, Shanghai Institute of Applied Mathematics and Mechanics, School of Mechanics and Engineering Science, Shanghai University, Shanghai 200444, People's Republic of China
| | - Mingchao Liu
- School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore 639798, Singapore
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10
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Wang E, Chen Z, Shi R, Xiong Z, Xin Z, Wang B, Guo J, Peng R, Wu Y, Li C, Ren H, Li X, Liu K. Humidity-Controlled Dynamic Engineering of Buckling Dimensionality in MoS 2 Thin Films. ACS NANO 2022; 16:14157-14167. [PMID: 36053054 DOI: 10.1021/acsnano.2c04203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Dynamic engineering of buckling deformation is of vital importance as it provides multiphase modulation of thin film devices. In particular, dynamic switch of buckles between one-dimensional (1D) and two-dimensional (2D) configurations in a single film system on rigid substrates is intriguing but very challenging. The current approach to changing buckling configuration is mainly achieved by varying the built-in stress at the film-substrate interface, but it is difficult to realize dynamic engineering on rigid substrates. Herein, we report a dynamic engineering of buckling deformation in MoS2 thin films by humidity-tuned interfacial adhesion. With the change of humidity, the MoS2 thin films deform from 1D telephone-cord buckles to 2D web-like buckles due to the hydrophilic nature of both MoS2 and substrate. Such 1D-to-2D evolution of buckles is attributed to the weakened interfacial adhesion of mixed deformation modes induced by humidity, which is verified by finite-element modeling. These buckled films further find potential applications as patterned templates for liquid condensation and sensing units for tactile sensors. Our work not only demonstrates the humidity-controlled dimensionality engineering of buckles in MoS2 thin films but also sheds light on the functional applications of buckled films based on their profile features.
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Affiliation(s)
- Enze Wang
- State Key Laboratory of New Ceramics and Fine Processing & Key Laboratory of Advanced Materials of Ministry of Education, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
| | - Zekun Chen
- Center for Advanced Mechanics and Materials, Applied Mechanics Laboratory, Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China
| | - Run Shi
- State Key Laboratory of New Ceramics and Fine Processing & Key Laboratory of Advanced Materials of Ministry of Education, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
| | - Zixin Xiong
- Center for Advanced Mechanics and Materials, Applied Mechanics Laboratory, Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China
| | - Zeqin Xin
- State Key Laboratory of New Ceramics and Fine Processing & Key Laboratory of Advanced Materials of Ministry of Education, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
| | - Bolun Wang
- State Key Laboratory of New Ceramics and Fine Processing & Key Laboratory of Advanced Materials of Ministry of Education, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
| | - Jing Guo
- State Key Laboratory of New Ceramics and Fine Processing & Key Laboratory of Advanced Materials of Ministry of Education, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
| | - Ruixuan Peng
- State Key Laboratory of New Ceramics and Fine Processing & Key Laboratory of Advanced Materials of Ministry of Education, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
| | - Yonghuang Wu
- State Key Laboratory of New Ceramics and Fine Processing & Key Laboratory of Advanced Materials of Ministry of Education, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
| | - Chenyu Li
- State Key Laboratory of New Ceramics and Fine Processing & Key Laboratory of Advanced Materials of Ministry of Education, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
| | - Hongtao Ren
- School of Materials Science and Engineering, Liaocheng University, Hunan Road No. 1, Liaocheng 252000, China
| | - Xiaoyan Li
- Center for Advanced Mechanics and Materials, Applied Mechanics Laboratory, Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China
| | - Kai Liu
- State Key Laboratory of New Ceramics and Fine Processing & Key Laboratory of Advanced Materials of Ministry of Education, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
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11
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Zhang L, Bai J, Ma T, Yin J, Jiang X. Intelligent Surface with Multi-dimensional Information Enabled by a Dual Responsive Pattern with Fluorescence and Wrinkle. Macromolecules 2022. [DOI: 10.1021/acs.macromol.2c01137] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Luzhi Zhang
- School of Chemistry & Chemical Engineering, Frontiers Science Center for Transformative Molecules, State Key Laboratory for Metal Matrix Composite Materials, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Jing Bai
- School of Chemistry & Chemical Engineering, Frontiers Science Center for Transformative Molecules, State Key Laboratory for Metal Matrix Composite Materials, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Tianjiao Ma
- School of Chemistry & Chemical Engineering, Frontiers Science Center for Transformative Molecules, State Key Laboratory for Metal Matrix Composite Materials, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Jie Yin
- School of Chemistry & Chemical Engineering, Frontiers Science Center for Transformative Molecules, State Key Laboratory for Metal Matrix Composite Materials, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Xuesong Jiang
- School of Chemistry & Chemical Engineering, Frontiers Science Center for Transformative Molecules, State Key Laboratory for Metal Matrix Composite Materials, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
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12
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Lu GZ, Li YJ, Hou CF, Ghosh R, Shen JL, Wu MJ, Lin TY, Chen YF. All-carbon stretchable and cavity-free white lasers. OPTICS EXPRESS 2022; 30:20213-20224. [PMID: 36224772 DOI: 10.1364/oe.457921] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Accepted: 05/15/2022] [Indexed: 06/16/2023]
Abstract
Flexible, stretchable, and bendable electronics and optoelectronics have a great potential for wide applications in smart life. An environmentally friendly, cost effective and wide-angle emission laser is indispensable for the emerging technology. In this work, circumvent the challenge issue, cavity-free and stretchable white light lasers based on all carbon materials have been demonstrated by integration of fluorescent carbon quantum dots (CQDs) and crumpled graphene. The typical emission spectrum of the cavity-free laser based on all-carbon materials has a CIE chromaticity coordinate of (0.30, 0.38) exhibiting an intriguing broadband white-light emission. The unprecedented and non-toxic stretchable and white light cavity-free lasers based on all-carbon materials can serve as next-generation optoelectronic devices for a wide range application covering solid-state lighting and future wearable technologies.
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13
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Plasmonically Enhanced Colloidal Quantum Dot/Graphene Doped Polymer Random Lasers. MATERIALS 2022; 15:ma15062213. [PMID: 35329665 PMCID: PMC8955689 DOI: 10.3390/ma15062213] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/23/2022] [Revised: 02/24/2022] [Accepted: 03/02/2022] [Indexed: 02/01/2023]
Abstract
An improvement in random lasers based on a colloidal quantum dot (QD)/graphene-doped polymer was observed and attributed to multiple light-scattering and graphene surface plasmon resonance. The emission characteristics of quantum dots doped with graphene oxide and reduced graphene oxide were compared. The QD/reduced graphene oxide hybrid exhibited a lower laser emission threshold (~460 μJ/cm2). The emission modes and thresholds were strongly dependent on both the graphene doping concentration and the external temperature. Decreased plasmon coupling was the primary reason for lower QD/graphene laser emission with increasing temperature. The optimum reduced graphene oxide concentration was 0.2 wt.%. This work provides a practical approach to optimizing the threshold and stability of random laser devices, with potential applications in displays, sensors, and anti-counterfeiting labels.
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14
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Mathur A, Fan H, Maheshwari V. Soft Polymer-Organolead Halide Perovskite Films for Highly Stretchable and Durable Photodetectors with Pt-Au Nanochain-Based Electrodes. ACS APPLIED MATERIALS & INTERFACES 2021; 13:58956-58965. [PMID: 34851102 DOI: 10.1021/acsami.1c18939] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The rigid and brittle nature of methylammonium lead iodide (MAPbI3) polycrystalline films limits their application in stretchable devices due to rapid deterioration in performance on cycling. By incorporation of polymer chains in the MAPbI3 films, a strategy to alter the mechanical modulus and the viscoelastic nature of the films has been developed. Combining this with flexible nanochain electrodes, highly stretchable and stable perovskite devices have been fabricated. The resultant polymer-MAPbI3 photodetector exhibits ultralow dark currents (∼10-11 A) and high light switching ratios (∼103) and maintains 75% of performance after 30 days. The viscoelastic nature and lower modulus of the polymer improve the energy dissipation in the polymer-MAPbI3 devices; as a result, they maintain 52% of the device performance after 10000 stretching cycles at 50% strain. The difference in the mechanical behavior is clearly observed in the failure mode of the two films. While rapid catastrophic cracking is observed in MAPbI3 films, the intensity and size of such crack formation are highly limited in polymer-MAPbI3 films, which prevent their failure.
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Affiliation(s)
- Avi Mathur
- Department of Chemistry, Waterloo Institute for Nanotechnology, University of Waterloo, 200 University Avenue West, Waterloo, Ontario N2L 3G1, Canada
| | - Hua Fan
- Department of Chemistry, Waterloo Institute for Nanotechnology, University of Waterloo, 200 University Avenue West, Waterloo, Ontario N2L 3G1, Canada
| | - Vivek Maheshwari
- Department of Chemistry, Waterloo Institute for Nanotechnology, University of Waterloo, 200 University Avenue West, Waterloo, Ontario N2L 3G1, Canada
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15
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Hasan N, Busse K, Ullah A, Hussain H, Kressler J. Formation of Surface Wrinkles in Collapsed Langmuir Films of a Polyhedral Oligomeric Silsesquioxane Containing Diblock Copolymer. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:13399-13408. [PMID: 34724380 DOI: 10.1021/acs.langmuir.1c02082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Surface pressure versus mean molecular area isotherms of Langmuir films of a hybrid diblock copolymer of poly(ethylene glycol) (PEG) and poly(methacrylo polyhedral oligomeric silsesquioxane) P(MA-POSS) together with Brewster angle microscopy reveal details of the phase transitions. The formation of a periodic wrinkling pattern in collapsed films is observed by epifluorescence microscopy after applying several compression-expansion cycles above the surface pressure of ≈18 mN/m. The wrinkle formation is reversible upon compression and expansion of the Langmuir films. Two distinct orientations of POSS molecules are assumed in Langmuir films upon compression, vertically for chains close to the water surface and horizontally orientated upper layers with significant amounts of PEG in between them. Thus, the wrinkling forms mainly in the top stiffer MA-POSS blocks above a certain compressional stress. The wrinkles disappear during the Langmuir-Blodgett (LB) transfer. Nevertheless, atomic force microscopy and grazing incidence wide-angle X-ray scattering experiments reveal the formation of highly ordered POSS molecules in LB films.
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Affiliation(s)
- Nazmul Hasan
- Department of Chemistry, Martin Luther University Halle-Wittenberg, D-06099 Halle (Saale), Germany
| | - Karsten Busse
- Department of Chemistry, Martin Luther University Halle-Wittenberg, D-06099 Halle (Saale), Germany
| | - Asad Ullah
- Department of Chemistry, Quaid-i-Azam University Islamabad, Islamabad 45320, Pakistan
| | - Hazrat Hussain
- Department of Chemistry, Quaid-i-Azam University Islamabad, Islamabad 45320, Pakistan
| | - Jörg Kressler
- Department of Chemistry, Martin Luther University Halle-Wittenberg, D-06099 Halle (Saale), Germany
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16
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Lin HI, Tan HY, Liao YM, Shen KC, Shalaginov MY, Kataria M, Chen CT, Chang JW, Chen YF. A Transferrable, Adaptable, Free-Standing, and Water-Resistant Hyperbolic Metamaterial. ACS APPLIED MATERIALS & INTERFACES 2021; 13:49224-49231. [PMID: 34609827 DOI: 10.1021/acsami.1c15481] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Hyperbolic metamaterials (HMMs) have attracted significant attention due to the profound manipulation of the photonic density of states, resulting in the efficient optoelectronic devices with the enhanced light-matter interaction. HMMs are conventionally built on rigid large-size substrates with poor conformability and the absence of flexibility. Here, we demonstrate a grating collageable HMM (GCHMM), which is composed of eight alternating layers of Au and poly(methyl methacrylate) (PMMA) and PMMA grating nanostructure containing quantum dots (QDs). The QDs serve as a scattering gain medium performing a random laser action, and the grating nanostructure enhances the extraction of light from QDs. The GCHMM enhances laser action by 13 times, reduces lasing threshold by 46%, and increases differential quantum efficiency by 1.8 times as compared to a planar collageable HMM. In addition, the GCHMM can be retransferred multiple times to other substrates as well as provide sufficient protection in water and still retain an excellent performance. It also shows stable functionality even when transferred to a dental floss. The GCHMM, therefore, promises to become a versatile platform for foldable, adaptable, free-standing, and water-resistant optoelectronic device applications.
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Affiliation(s)
- Hung-I Lin
- Department of Physics, National Taiwan University, Taipei 10617, Taiwan
| | - Hsiang-Yao Tan
- Department of Physics, National Taiwan University, Taipei 10617, Taiwan
| | - Yu-Ming Liao
- Department of Physics, National Taiwan University, Taipei 10617, Taiwan
| | - Kun-Ching Shen
- Advanced Remanufacturing and Technology Centre, The Agency for Science, Technology and Research, 637143 Singapore
| | - Mikhail Y Shalaginov
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Monika Kataria
- Department of Physics, National Taiwan University, Taipei 10617, Taiwan
| | - Chih-Ting Chen
- Department of Physics, National Taiwan University, Taipei 10617, Taiwan
| | - Jun-Wei Chang
- Department of Physics, National Taiwan University, Taipei 10617, Taiwan
| | - Yang-Fang Chen
- Department of Physics, National Taiwan University, Taipei 10617, Taiwan
- Advanced Research Centre for Green Materials Science and Technology, National Taiwan University, Taipei 10617, Taiwan
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17
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Hlil AR, Thomas J, Garcia-Puente Y, Boisvert JS, Lima BC, Rakotonandrasana A, Maia LJQ, Tehranchi A, Loranger S, Gomes ASL, Messaddeq Y, Kashyap R. Structural and optical properties of Nd:YAB-nanoparticle-doped PDMS elastomers for random lasers. Sci Rep 2021; 11:16803. [PMID: 34413334 PMCID: PMC8377032 DOI: 10.1038/s41598-021-95921-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Accepted: 07/26/2021] [Indexed: 11/08/2022] Open
Abstract
We report the structural and optical properties of Nd:YAB (NdxY1-x Al3(BO3)4)-nanoparticle-doped PDMS elastomer films for random lasing (RL) applications. Nanoparticles with Nd ratios of x = 0.2, 0.4, 0.6, 0.8, and 1.0 were prepared and then incorporated into the PDMS elastomer to control the optical gain density and scattering center content over a wide range. The morphology and thermal stability of the elastomer composites were studied. A systematic investigation of the lasing wavelength, threshold, and linewidth of the laser was carried out by tailoring the concentration and optical gain of the scattering centers. The minimum threshold and linewidth were found to be 0.13 mJ and 0.8 nm for x = 1 and 0.8. Furthermore, we demonstrated that the RL intensity was easily tuned by controlling the degree of mechanical stretching, with strain reaching up to 300%. A strong, repeatable lasing spectrum over ~ 50 cycles of applied strain was observed, which demonstrates the high reproducibility and robustness of the RL. In consideration for biomedical applications that require long-term RL stability, we studied the intensity fluctuation of the RL emission, and confirmed that it followed Lévy-like statistics. Our work highlights the importance of using rare-earth doped nanoparticles with polymers for RL applications.
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Affiliation(s)
- Antsar R Hlil
- Fabulas Laboratory, Department of Engineering Physics, École Polytechnique Montréal, Station Centre-ville, P.O Box 6079, Montreal, QC, H3C 3A7, Canada.
- Département de Chimie, Faculté des Sciences et de Génie Pavillon Alexmoura Vachon, Université Laval, 1045, avenue de la Médecine, Quebec, G1V 0A6, Canada.
- Centre d'Optique, Photonique et Laser, Université Laval, 2375 Rue de la Terrasse, Quebec, QC, G1V 0A6, Canada.
| | - Jyothis Thomas
- Fabulas Laboratory, Department of Engineering Physics, École Polytechnique Montréal, Station Centre-ville, P.O Box 6079, Montreal, QC, H3C 3A7, Canada
| | - Yalina Garcia-Puente
- Fabulas Laboratory, Department of Engineering Physics, École Polytechnique Montréal, Station Centre-ville, P.O Box 6079, Montreal, QC, H3C 3A7, Canada
| | - Jean-Sebastien Boisvert
- Fabulas Laboratory, Department of Engineering Physics, École Polytechnique Montréal, Station Centre-ville, P.O Box 6079, Montreal, QC, H3C 3A7, Canada
| | - Bismarck C Lima
- Center for Telecommunications Studies, Pontifical Catholic University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Ando Rakotonandrasana
- Fabulas Laboratory, Department of Engineering Physics, École Polytechnique Montréal, Station Centre-ville, P.O Box 6079, Montreal, QC, H3C 3A7, Canada
| | - Lauro J Q Maia
- Grupo Física de Materiais, Instituto de Física, Universidade Federal de Goiás-UFG, Campus II, Av.Esperança 1533, Goiânia, GO, 74690-900, Brazil
| | - Amirhossein Tehranchi
- Fabulas Laboratory, Department of Engineering Physics, École Polytechnique Montréal, Station Centre-ville, P.O Box 6079, Montreal, QC, H3C 3A7, Canada
| | - Sebastien Loranger
- Fabulas Laboratory, Department of Engineering Physics, École Polytechnique Montréal, Station Centre-ville, P.O Box 6079, Montreal, QC, H3C 3A7, Canada
| | - Anderson S L Gomes
- Departamento de Física, Universidade Federal de Pernambuco, Recife, PE, Brazil
| | - Younes Messaddeq
- Département de Chimie, Faculté des Sciences et de Génie Pavillon Alexmoura Vachon, Université Laval, 1045, avenue de la Médecine, Quebec, G1V 0A6, Canada
- Centre d'Optique, Photonique et Laser, Université Laval, 2375 Rue de la Terrasse, Quebec, QC, G1V 0A6, Canada
| | - Raman Kashyap
- Fabulas Laboratory, Department of Engineering Physics, École Polytechnique Montréal, Station Centre-ville, P.O Box 6079, Montreal, QC, H3C 3A7, Canada.
- Centre d'Optique, Photonique et Laser, Université Laval, 2375 Rue de la Terrasse, Quebec, QC, G1V 0A6, Canada.
- Fabulas Laboratory, Department of Electrical Engineering, École Polytechnique Montréal, Station Centre-ville, P.O Box 6079, Montreal, QC, H3C 3A7, Canada.
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18
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Chen P, Li Z, Li D, Pi L, Liu X, Luo J, Zhou X, Zhai T. 2D Rare Earth Material (EuOCl) with Ultra-Narrow Photoluminescence at Room Temperature. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2021; 17:e2100137. [PMID: 33811431 DOI: 10.1002/smll.202100137] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2021] [Revised: 02/24/2021] [Indexed: 06/12/2023]
Abstract
High color purity and color rendition of 2D luminescent materials have long been pursued for applications in low-dimensional lighting, display, biolabeling, and laser. However, the reported photoluminescence (PL) linewidth of most 2D luminescent materials is about dozens of meV. Herein, a brand-new luminescent system of 2D rare earth (RE) material EuOCl (1.1 nm) with ultra-narrow linewidth (1.2 meV) at room temperature is successfully synthesized via chemical vapor deposition (CVD). The linewidth of EuOCl flakes at room temperature is even narrower than most 2D luminescent materials and heterostructures detected at below 10 K. Impressively, the as-synthesized EuOCl flakes show abnormal temperature-dependent photoluminescent properties, which is absolutely different from the relatively stable 4f-4f transitions in RE owing to shielding from outer shell electrons. J-mixing effect has been successfully applied for this phenomenon. Undoubtedly, luminescent 2D EuOCl flakes will open new territory for the applications of 2D RE materials in the 2D luminescent areas, especially for the applications at room temperature.
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Affiliation(s)
- Ping Chen
- State Key Laboratory of Materials Processing and Die and Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology (HUST), Wuhan, 430074, P. R. China
| | - Zexin Li
- State Key Laboratory of Materials Processing and Die and Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology (HUST), Wuhan, 430074, P. R. China
| | - Dongyan Li
- State Key Laboratory of Materials Processing and Die and Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology (HUST), Wuhan, 430074, P. R. China
| | - Lejing Pi
- State Key Laboratory of Materials Processing and Die and Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology (HUST), Wuhan, 430074, P. R. China
| | - Xitao Liu
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, P. R. China
| | - Junhua Luo
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, P. R. China
| | - Xing Zhou
- State Key Laboratory of Materials Processing and Die and Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology (HUST), Wuhan, 430074, P. R. China
- State Key Laboratory of Crystal Materials, Shandong University, Jinan, 250100, P. R. China
| | - Tianyou Zhai
- State Key Laboratory of Materials Processing and Die and Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology (HUST), Wuhan, 430074, P. R. China
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19
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Gummaluri VS, Gayathri R, Vijayan C, Matham MV. Bio-inspired wrinkle microstructures for random lasing governed by surface roughness. OPTICS LETTERS 2021; 46:1033-1036. [PMID: 33649650 DOI: 10.1364/ol.417148] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Accepted: 01/26/2021] [Indexed: 06/12/2023]
Abstract
A method for fabricating bio-inspired scattering substrates based on polydimethylsiloxane (PDMS) for spatially incoherent random lasing is presented. The leaves of monstera and piper sarmentosum plants are used to mold PDMS polymer to form wrinkle-like scattering substrates, which are then used with a liquid gain medium for random lasing. Scattering is attributed to the surface roughness (Sa) of the samples. The rougher sample with 5.2 µm Sa shows a two-mode stable lasing with a 2 nm linewidth and a lower threshold fluence of 0.2mJ/cm2 compared to the sample with smaller Sa (3.6 µm) with a linewidth of 5 nm and a threshold fluence of 0.5mJ/cm2. The waveguide theory substantiates the results of incoherent random lasing through a relation between the microstructure feature size and the mean free path. Power Fourier transform analysis is used to deduce the resonant cavity length of 180 µm in the rougher sample, and the observed variations in cavity length with Sa validate the optical feedback. PDMS being hydrophobic, the scattering substrate can be reused by wiping off the gain medium. This Letter paves the way for facile fabrication methods of bio-inspired random lasers for sensing and imaging applications.
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20
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Ghosh R, Lin HI, Chen YS, Singh M, Yen ZL, Chiu S, Lin HY, Bera KP, Liao YM, Hofmann M, Hsieh YP, Chen YF. QD/2D Hybrid Nanoscrolls: A New Class of Materials for High-Performance Polarized Photodetection and Ultralow Threshold Laser Action. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2020; 16:e2003944. [PMID: 33079462 DOI: 10.1002/smll.202003944] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Revised: 08/26/2020] [Indexed: 06/11/2023]
Abstract
Nanoscrolls are a class of nanostructures where atomic layers of 2D materials are stacked consecutively in a coaxial manner to form a 1D spiral topography. Self-assembly of chemical vapor deposition grown 2D WS2 monolayer into quasi-1D van der Waals scroll structure instigates a plethora of unique physiochemical properties significantly different from its 2D counterparts. The physical properties of such nanoscrolls can be greatly manipulated upon hybridizing them with high-quantum-yield colloidal quantum dots, forming 0D/2D structures. The efficient dissociation of excitons at the heterojunctions of QD/2D hybridized nanoscrolls exhibits a 3000-fold increased photosensitivity compared to the pristine 2D-material-based nanoscroll. The synergistic effects of confined geometry and efficient QD scatterers produce a nanocavity with multiple feedback loops, resulting in coherent lasing action with an unprecedentedly low lasing threshold. Predominant localization of the excitons along the circumference of this helical scroll results in a 12-fold brighter emission for the parallel-polarized transition compared to the perpendicular one, as confirmed by finite-difference time-domain simulation. The versatility of hybridized nanoscrolls and their unique properties opens up a powerful route for not-yet-realized devices toward practical applications.
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Affiliation(s)
- Rapti Ghosh
- Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei, 115, Taiwan
- Department of Physics, National Central University, ChungLi, 320, Taiwan
- Molecular Science and Technology Program, Taiwan International Graduate Program, Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei, 115, Taiwan
- Department of Physics, National Taiwan University, Taipei, 106, Taiwan
| | - Hung-I Lin
- Department of Physics, National Taiwan University, Taipei, 106, Taiwan
- Graduate Institute of Applied Physics, National Taiwan University, Taipei, 106, Taiwan
| | - Yu-Siang Chen
- Institute of Opto-Mechatronics, National Chung Cheng University, Chiayi, 62102, Taiwan
| | - Mukesh Singh
- Department of Physics, National Taiwan University, Taipei, 106, Taiwan
| | - Zhi-Long Yen
- Department of Physics, National Taiwan University, Taipei, 106, Taiwan
| | - Shengkuei Chiu
- Department of Materials Science and Engineering, Feng Chia University, Taichung, 40724, Taiwan
| | - Hsia-Yu Lin
- Department of Physics, National Taiwan University, Taipei, 106, Taiwan
| | - Krishna P Bera
- Department of Physics, National Taiwan University, Taipei, 106, Taiwan
| | - Yu-Ming Liao
- Department of Physics, National Taiwan University, Taipei, 106, Taiwan
| | - Mario Hofmann
- Department of Physics, National Taiwan University, Taipei, 106, Taiwan
| | - Ya-Ping Hsieh
- Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei, 115, Taiwan
- Molecular Science and Technology Program, Taiwan International Graduate Program, Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei, 115, Taiwan
| | - Yang-Fang Chen
- Department of Physics, National Taiwan University, Taipei, 106, Taiwan
- Graduate Institute of Applied Physics, National Taiwan University, Taipei, 106, Taiwan
- Advanced Research Center for Green Materials Science and Technology, National Taiwan University, Taipei, 106, Taiwan
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21
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Shen TL, Hu HW, Lin WJ, Liao YM, Chen TP, Liao YK, Lin TY, Chen YF. Coherent Förster resonance energy transfer: A new paradigm for electrically driven quantum dot random lasers. SCIENCE ADVANCES 2020; 6:6/41/eaba1705. [PMID: 33028514 PMCID: PMC7541067 DOI: 10.1126/sciadv.aba1705] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2019] [Accepted: 08/24/2020] [Indexed: 05/19/2023]
Abstract
The many distinct advantages of random lasers focused efforts on developing a breakthrough from optical pumping to electrical pumping. However, progress in these is limited due to high optical loss and low gain. In this work, we demonstrate an electrically pumped quantum dot (QD) random laser with visible emission based on a previously unexplored paradigm named coherent Förster resonance energy transfer (CFRET). In the CFRET process, when a coherent photonic mode is formed because of multiple scattering of the emitted light traveling in mixed donor and acceptor QDs, the donor QDs not only serve as scattering centers but are also enable coherent energy transfer to acceptor QDs. Therefore, the laser action can be easily achieved, and the lasing threshold is greatly reduced. Our approach of electrically pumped QD-based random lasers represents a substantial step toward a full-spectrum random laser for practical applications.
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Affiliation(s)
- Tien-Lin Shen
- Graduate Institute of Applied Physics, National Taiwan University, Taipei 10617, Taiwan
| | - Han-Wen Hu
- Department of Physics, National Taiwan University, Taipei 10617, Taiwan
| | - Wei-Ju Lin
- Department of Physics, National Taiwan University, Taipei 10617, Taiwan
| | - Yu-Ming Liao
- Department of Physics, National Taiwan University, Taipei 10617, Taiwan
| | - Tzu-Pei Chen
- Department of Physics, National Taiwan University, Taipei 10617, Taiwan
| | - Yu-Kuang Liao
- Department of Electro-physics, National Chiao Tung University, Hsinchu 30010, Taiwan
| | - Tai-Yuan Lin
- Institute of Optoelectronic Sciences, National Taiwan Ocean University, Keelung 202, Taiwan
| | - Yang-Fang Chen
- Department of Physics, National Taiwan University, Taipei 10617, Taiwan.
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22
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Roy PK, Ulaganathan RK, Raghavan CM, Mhatre SM, Lin HI, Chen WL, Chang YM, Rozhin A, Hsu YT, Chen YF, Sankar R, Chou FC, Liang CT. Unprecedented random lasing in 2D organolead halide single-crystalline perovskite microrods. NANOSCALE 2020; 12:18269-18277. [PMID: 32857093 DOI: 10.1039/d0nr01171a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Three-dimensional organic-inorganic hybrid halide perovskites have been demonstrated as great materials for applications in optoelectronics and photonics. However, their inherent instabilities in the presence of moisture, light, and heat may hinder their commercialization. Alternatively, emerging two-dimensional (2D) organic-inorganic hybrid perovskites have recently attracted increasing attention owing to their great environmental stability and inherent natural quantum-well structure. In this work, we have synthesized a high-quality long-chain organic diammonium spacer assisted 2D hybrid perovskite FA-(N-MPDA)PbBr4 (FA = formamidinium and N-MPDA = N-methylpropane-1,3-diammonium) by the slow evaporation at constant temperature method. The millimeter-sized single-crystalline microrods demonstrate low threshold random lasing behavior at room temperature. The single-crystalline 2D hybrid perovskite random laser achieved a very narrow linewidth (∼0.1 nm) with a low threshold (∼0.5 μJ cm-2) and a high quality factor (∼5350). Furthermore, the 2D hybrid microrod laser shows stable lasing emission with no measurable degradation after at least 2 h under continuous illumination, which substantially proves the stability of 2D perovskites. Our results demonstrate the promise of 2D organic-inorganic microrod-shaped perovskites and provide an important step toward the realization of high-performance optoelectronic devices.
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Affiliation(s)
- Pradip Kumar Roy
- Department of Physics, National Taiwan University, Taipei 10617, Taiwan.
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23
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Bera KP, Kamal S, Inamdar AI, Sainbileg B, Lin HI, Liao YM, Ghosh R, Chang TJ, Lee YG, Cheng-Fu H, Hsu YT, Hayashi M, Hung CH, Luo TT, Lu KL, Chen YF. Intrinsic Ultralow-Threshold Laser Action from Rationally Molecular Design of Metal-Organic Framework Materials. ACS APPLIED MATERIALS & INTERFACES 2020; 12:36485-36495. [PMID: 32678568 DOI: 10.1021/acsami.0c07890] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Metal-organic frameworks (MOFs) are superior for multiple applications including drug delivery, sensing, and gas storage because of their tunable physiochemical properties and fascinating architectures. Optoelectronic application of MOFs is difficult because of their porous geometry and conductivity issues. Recently, a few optoelectronic devices have been fabricated by a suitable design of integrating MOFs with other materials. However, demonstration of laser action arising from MOFs as intrinsic gain media still remains challenging, even though some studies endeavor on encapsulating luminescence organic laser dyes into the porous skeleton of MOFs to achieve laser action. Unfortunately, the aggregation of such unstable laser dyes causes photoluminescence quenching and energy loss, which limits their practical application. In this research, unprecedently, we demonstrated ultralow-threshold (∼13 nJ/cm2) MOF laser action by a judicious choice of metal nodes and organic linkers during synthesis of MOFs. Importantly, we also demonstrated that the white random lasing from the beautiful microflowers of organic linkers possesses a porous network, which is utilized to synthesize the MOFs. The highly luminescent broad-band organic linker 1,4-NDC, which itself exhibits a strong white random laser, is used not only to achieve the stimulated emission in MOFs but also to reduce the lasing threshold. Such white lasing has multiple applications from bioimaging to the recently developed versatile Li-Fi technology. In addition, we showed that the smooth facets of MOF microcrystals can show Fabry-Perot resonant cavities having a high quality factor of ∼103 with excellent photostability. Our unique discovery of stable, nontoxic, high-performance MOF laser action will open up a new route for the development of new optoelectronic devices.
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Affiliation(s)
- Krishna Prasad Bera
- Department of Physics, National Taiwan University, Taipei 10617, Taiwan
- Nano-Science and Technology Program, Taiwan International Graduate Program, Academia Sinica, Taipei 11529, Taiwan
| | - Saqib Kamal
- Institute of Chemistry, Academia Sinica, Taipei 115, Taiwan
- Molecular-Science and Technology Program,Taiwan International Graduate Program, Academia Sinica, Taipei 11529, Taiwan
- Department of Chemistry, National Tsing Hua University, Hsinchu 300, Taiwan
| | - Arif I Inamdar
- Sustainable Chemical Science and Technology, Taiwan International Graduate Program, Academia Sinica, Taipei 106, Taiwan and Department of Applied Chemistry, National Chiao Tung University, Hsinchu 300, Taiwan
- Institute of Chemistry, Academia Sinica, Taipei 115, Taiwan
| | - Batjargal Sainbileg
- Center for Condensed Matter Sciences, National Taiwan University, Taipei 10617, Taiwan
- Center of Atomic Initiative for New Materials, National Taiwan University, Taipei 10617, Taiwan
| | - Hung-I Lin
- Department of Physics, National Taiwan University, Taipei 10617, Taiwan
| | - Yu-Ming Liao
- Department of Physics, National Taiwan University, Taipei 10617, Taiwan
- Nano-Science and Technology Program, Taiwan International Graduate Program, Academia Sinica, Taipei 11529, Taiwan
| | - Rapti Ghosh
- Molecular-Science and Technology Program,Taiwan International Graduate Program, Academia Sinica, Taipei 11529, Taiwan
| | - Ting-Jia Chang
- Department of Physics, National Taiwan University, Taipei 10617, Taiwan
| | - Yen-Guang Lee
- Department of Physics, National Taiwan University, Taipei 10617, Taiwan
| | - Hou Cheng-Fu
- Department of Physics, National Taiwan University, Taipei 10617, Taiwan
- Nano-Science and Technology Program, Taiwan International Graduate Program, Academia Sinica, Taipei 11529, Taiwan
| | - Yun-Tzu Hsu
- Department of Physics, National Taiwan University, Taipei 10617, Taiwan
| | - Michitoshi Hayashi
- Center for Condensed Matter Sciences, National Taiwan University, Taipei 10617, Taiwan
- Center of Atomic Initiative for New Materials, National Taiwan University, Taipei 10617, Taiwan
| | | | - Tzuoo-Tsair Luo
- Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, Taipei 106, Taiwan
| | - Kuang-Lieh Lu
- Institute of Chemistry, Academia Sinica, Taipei 115, Taiwan
| | - Yang-Fang Chen
- Department of Physics, National Taiwan University, Taipei 10617, Taiwan
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24
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Hu HW, Haider G, Liao YM, Roy PK, Lin HI, Lin SY, Chen YF. Ultralow Threshold Cavity-Free Laser Induced by Total Internal Reflection. ACS OMEGA 2020; 5:18551-18556. [PMID: 32775855 PMCID: PMC7407540 DOI: 10.1021/acsomega.9b04094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Accepted: 03/27/2020] [Indexed: 06/11/2023]
Abstract
Total internal reflection is one of the most important phenomena when a propagated wave strikes a medium boundary, which possesses a wide range of applications spanning from optical communication to a fluorescence microscope. It has also been widely used to demonstrate conventional laser actions with resonant cavities. Recently, cavity-free stimulated emission of radiation has attracted great attention in disordered media because of several exciting physical phenomena, ranging from Anderson localization of light to speckle-free imaging. However, unlike conventional laser systems, the total internal reflection has never been implemented in the study of laser actions derived from randomly distributed media. Herein, we demonstrate an ultra-low threshold cavity-free laser system using air bubbles as scattering centers in which the total internal reflection from the surface of air bubbles can greatly reduce the leakage of the scattered beam energy and then enhance light amplification within a coherent closed loop. Our approach provides an excellent alternative for the manipulation of optical energy flow to achieve ultra-low threshold cavity-free laser systems, which should be very useful for the development of high performance optoelectronic devices.
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Affiliation(s)
- Han-Wen Hu
- Department
of Physics, National Taiwan University, Taipei 10617, Taiwan
| | - Golam Haider
- Academy
of Sciences of the Czech Republic, J. Heyrovský
Institute of Physical Chemistry, Prague 8, Czechia
| | - Yu-Ming Liao
- Department
of Physics, National Taiwan University, Taipei 10617, Taiwan
| | - Pradip Kumar Roy
- Department
of Physics, National Taiwan University, Taipei 10617, Taiwan
| | - Hung-I. Lin
- Department
of Physics, National Taiwan University, Taipei 10617, Taiwan
| | - Shih-Yao Lin
- Department
of Physics, National Taiwan University, Taipei 10617, Taiwan
| | - Yang-Fang Chen
- Department
of Physics, National Taiwan University, Taipei 10617, Taiwan
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25
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Pincheira PIR, da Silva Neto ML, Maldonado M, de Araújo CB, Jawaid AM, Busch R, Ritter AJ, Vaia RA, Gomes ASL. Monolayer 2D ZrTe 2 transition metal dichalcogenide as nanoscatter for random laser action. NANOSCALE 2020; 12:15706-15710. [PMID: 32672308 DOI: 10.1039/d0nr03152f] [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 demonstrate random laser emission from Rhodamine 6G with ZrTe2 transition metal dichalcogenide (TMD) as nanoscatters, both in powder and 2D nanoflakes liquid suspension. The 2D semimetal ZrTe2 was synthesized by a modified redox exfoliation method to provide single layer TMD, which was employed for the first time as the scatter medium to provide feedback in an organic gain medium random laser. In order to exploit random laser emission and its threshold value, replica symmetry breaking leading to a photonic paramagnetic to photonic spin glass transition in both 2D and 3D (powder) ZrTe2 was demonstrated. One important aspect of mixing organic dyes with ZrTe2 is that there is no chemical reaction leading to dye degradation, demonstrated by operating over more than 2 hours of pulsed (5 Hz) random laser emission.
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Affiliation(s)
- Pablo I R Pincheira
- Departamento de Ciencias Fisicas, Universidad de La Frontera, Temuco, Chile.
| | - Manoel L da Silva Neto
- Graduate Program in materials Science, Universidade Federal de Pernambuco, 50670-901, Recife-PE, Brazil
| | - Melissa Maldonado
- Departamento de Física, Universidade Federal de Pernambuco, Av. Prof. Moraes Rego, 1235, Cidade Universitária, Recife, PE 50670-901, Brazil.
| | - Cid B de Araújo
- Graduate Program in materials Science, Universidade Federal de Pernambuco, 50670-901, Recife-PE, Brazil and Departamento de Física, Universidade Federal de Pernambuco, Av. Prof. Moraes Rego, 1235, Cidade Universitária, Recife, PE 50670-901, Brazil.
| | - Ali M Jawaid
- Materials and Manofacturing Directorate, Air Force Research Laboratories, 45433, Ohio, USA
| | - Robert Busch
- Materials and Manofacturing Directorate, Air Force Research Laboratories, 45433, Ohio, USA
| | - Allyson J Ritter
- Materials and Manofacturing Directorate, Air Force Research Laboratories, 45433, Ohio, USA
| | - Richard A Vaia
- Materials and Manofacturing Directorate, Air Force Research Laboratories, 45433, Ohio, USA
| | - Anderson S L Gomes
- Departamento de Física, Universidade Federal de Pernambuco, Av. Prof. Moraes Rego, 1235, Cidade Universitária, Recife, PE 50670-901, Brazil.
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26
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Computational study of the water-driven graphene wrinkle life-cycle towards applications in flexible electronics. Sci Rep 2020; 10:11315. [PMID: 32647172 PMCID: PMC7347945 DOI: 10.1038/s41598-020-68080-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2020] [Accepted: 06/17/2020] [Indexed: 11/25/2022] Open
Abstract
The ubiquitous presence of wrinkles in two-dimensional materials alters their properties significantly. It is observed that during the growth process of graphene, water molecules, sourced from ambient humidity or transferred method used, can get diffused in between graphene and the substrate. The water diffusion causes/assists wrinkle formation in graphene, which influences its properties. The diffused water eventually dries, altering the geometrical parameters and properties of wrinkled graphene nanoribbons. Our study reveals that the initially distributed wrinkles tend to coalesce to form a localized wrinkle whose configuration depends on the initial wrinkle geometry and the quantity of the diffused water. The movement of the localized wrinkle is categorized into three modes—bending, buckling, and sliding. The sliding mode is characterized in terms of velocity as a function of diffused water quantity. Direct bandgap increases linearly with the initial angle except the highest angle considered (21°), which can be attributed to the electron tunneling effect observed in the orbital analysis. The system becomes stable with an increase in the initial angle of wrinkle as observed from the potential energy plots extracted from MD trajectories and confirmed with the DOS plot. The maximum stress generated is less than the plastic limit of the graphene.
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27
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Kataria M, Yadav K, Nain A, Lin HI, Hu HW, Paul Inbaraj CR, Chang TJ, Liao YM, Cheng HY, Lin KH, Chang HT, Tseng FG, Wang WH, Chen YF. Self-Sufficient and Highly Efficient Gold Sandwich Upconversion Nanocomposite Lasers for Stretchable and Bio-applications. ACS APPLIED MATERIALS & INTERFACES 2020; 12:19840-19854. [PMID: 32270675 DOI: 10.1021/acsami.0c02602] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Multifunctional lanthanide-doped upconversion nanoparticles (UCNPs) have spread their wings in the fields of flexible optoelectronics and biomedical applications. One of the ongoing challenges lies in achieving UCNP-based nanocomposites, which enable a continuous-wave (CW) laser action at ultralow thresholds. Here, gold sandwich UCNP nanocomposites [gold (Au1)-UCNP-gold (Au2)] capable of exhibiting lasing at ultralow thresholds under CW excitation are demonstrated. The metastable energy-level characteristics of lanthanides are advantageous for creating population inversion. In particular, localized surface plasmon resonance-based electromagnetic hotspots in the nanocomposites and the huge enhancement of scattering coefficient for the formation of coherent closed loops due to multiple scattering facilitate the process of stimulated emissions as confirmed by theoretical simulations. The nanocomposites are subjected to stretchable systems for enhancing the lasing action (threshold ∼ 0.06 kW cm-2) via a light-trapping effect. The applications in bioimaging of HeLa cells and antibacterial activity (photothermal therapy) are demonstrated using the newly designed Au1-UCNP-Au2 nanocomposites.
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Affiliation(s)
- Monika Kataria
- Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 115, Taiwan
- Department of Physics, National Central University, Chung-Li 320, Taiwan
- Molecular Science and Technology Program, Taiwan International Graduate Program, Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 115, Taiwan
- Department of Physics, National Taiwan University, Taipei 106, Taiwan
| | - Kanchan Yadav
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
- Nanoscience and Nanotechnology Program, Taiwan International Graduate Program, Institute of Physics, Academia Sinica, Taipei 106, Taiwan
| | - Amit Nain
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
- Nanoscience and Nanotechnology Program, Taiwan International Graduate Program, Institute of Physics, Academia Sinica, Taipei 106, Taiwan
- Department of Engineering and System Science, National Tsing Hua University, Hsinchu 300, Taiwan
| | - Hung-I Lin
- Department of Physics, National Taiwan University, Taipei 106, Taiwan
| | - Han-Wen Hu
- Department of Physics, National Taiwan University, Taipei 106, Taiwan
| | - Christy Roshini Paul Inbaraj
- Department of Physics, National Taiwan University, Taipei 106, Taiwan
- Nanoscience and Nanotechnology Program, Taiwan International Graduate Program, Institute of Physics, Academia Sinica, Taipei 106, Taiwan
- Department of Engineering and System Science, National Tsing Hua University, Hsinchu 300, Taiwan
| | - Ting-Jia Chang
- Department of Physics, National Taiwan University, Taipei 106, Taiwan
| | - Yu-Ming Liao
- Department of Physics, National Taiwan University, Taipei 106, Taiwan
| | - Hao-Yu Cheng
- Institute of Physics, Academia Sinica, Taipei 11529, Taiwan
| | - Kung-Hsuan Lin
- Institute of Physics, Academia Sinica, Taipei 11529, Taiwan
| | - Huan-Tsung Chang
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
- Department of Chemistry, Chung Yuan Christian University, Chungli District, Taoyuan City 32023, Taiwan
| | - Fan-Gang Tseng
- Department of Engineering and System Science, National Tsing Hua University, Hsinchu 300, Taiwan
- Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu 300, Taiwan
- Division of Mechanics, Research Center for Applied Sciences, Academia Sinica, Nangang, Taipei 115, Taiwan
| | - Wei-Hua Wang
- Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 115, Taiwan
- Molecular Science and Technology Program, Taiwan International Graduate Program, Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 115, Taiwan
| | - Yang-Fang Chen
- Department of Physics, National Taiwan University, Taipei 106, Taiwan
- Advanced Research Centre for Green Materials Science and Technology, National Taiwan University, Taipei 10617, Taiwan
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28
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Zheng F, Thi QH, Wong LW, Deng Q, Ly TH, Zhao J. Critical Stable Length in Wrinkles of Two-Dimensional Materials. ACS NANO 2020; 14:2137-2144. [PMID: 31951371 DOI: 10.1021/acsnano.9b08928] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The emergent two-dimensional (2D) materials are atomically thin and ultraflexible, promising for a variety of miniaturized, high-performance, and flexible devices in applications. On one hand, the ultrahigh flexibility causes problems: the prevalent wrinkles in 2D materials may undermine the ideal properties and create barriers in fabrication, processing, and quality control of materials. On the other hand, in some cases the wrinkles are used for the architecturing of surface texture and the modulation of physical/chemical properties. Therefore, a thorough understanding of the mechanism and stability of wrinkles is highly needed. Herein, we report a critical length for stabilizing the wrinkles in 2D materials, observed in the wrinkling and wrinkle elimination processes upon thermal annealing as well as by our in situ TEM manipulations on individual wrinkles, which directly capture the evolving wrinkles with variable lengths. The experiments, mechanical modeling, and self-consistent charge density functional tight binding (SCC-DFTB) simulations reveal that a minimum critical length is required for stabilizing the wrinkles in 2D materials. Wrinkles with lengths below a critical value are unstable and removable by thermal annealing, while wrinkles with lengths above a critical value are self-stabilized by van der Waals interactions. It additionally confirms the pronounced frictional effects in wrinkles with lengths above critical value during dynamical movement or sliding.
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Affiliation(s)
- Fangyuan Zheng
- Department of Applied Physics , The Hong Kong Polytechnic University , Kowloon , Hong Kong , China
- The Hong Kong Polytechnic University Shenzhen Research Institute , Shenzhen 518000 , China
| | - Quoc Huy Thi
- Department of Chemistry and Center of Super-Diamond & Advanced Films (COSDAF) , City University of Hong Kong , Kowloon , Hong Kong , China
- City University of Hong Kong Shenzhen Research Institute , Shenzhen 518000 , China
| | - Lok Wing Wong
- Department of Applied Physics , The Hong Kong Polytechnic University , Kowloon , Hong Kong , China
- The Hong Kong Polytechnic University Shenzhen Research Institute , Shenzhen 518000 , China
| | - Qingming Deng
- Physics Department and Jiangsu Key Laboratory for Chemistry of Low-Dimensional Materials , Huaiyin Normal University , Huaian 223300 , China
| | - Thuc Hue Ly
- Department of Chemistry and Center of Super-Diamond & Advanced Films (COSDAF) , City University of Hong Kong , Kowloon , Hong Kong , China
- City University of Hong Kong Shenzhen Research Institute , Shenzhen 518000 , China
| | - Jiong Zhao
- Department of Applied Physics , The Hong Kong Polytechnic University , Kowloon , Hong Kong , China
- The Hong Kong Polytechnic University Shenzhen Research Institute , Shenzhen 518000 , China
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29
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Hoinka NM, Ostwald C, Fuhrmann-Lieker T. Two-dimensional Wrinkle Resonators for Random Lasing in Organic Glasses. Sci Rep 2020; 10:2434. [PMID: 32051460 PMCID: PMC7015940 DOI: 10.1038/s41598-020-59236-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Accepted: 12/30/2019] [Indexed: 11/09/2022] Open
Abstract
Random lasers consisting of slab waveguides with two-dimensional disordered wrinkling patterns that act as scattering resonators are reported. As active material 2,2',7,7'-tetraphenyl-9,9'-spirobifluorene is used which is sandwiched between an oxidized silicon wafer and a cladding with higher glass transition temperature. Wrinkles with tailorable periodicity have been induced by thermal annealing. Photopumping experiments show the transition from amplified spontaneous emission to a multiple peak laser spectrum with linewidths as low as 0.1 nm, demonstrating the applicability of this approach for random laser design.
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Affiliation(s)
- Nicolai M Hoinka
- Macromolecular Chemistry and Molecular Materials, Institute of Chemistry and Center for Interdisciplinary Nanostructure Science and Technology, University of Kassel, Heinrich-Plett Str. 40, 34132, Kassel, Germany
| | - Christoph Ostwald
- Macromolecular Chemistry and Molecular Materials, Institute of Chemistry and Center for Interdisciplinary Nanostructure Science and Technology, University of Kassel, Heinrich-Plett Str. 40, 34132, Kassel, Germany
| | - Thomas Fuhrmann-Lieker
- Macromolecular Chemistry and Molecular Materials, Institute of Chemistry and Center for Interdisciplinary Nanostructure Science and Technology, University of Kassel, Heinrich-Plett Str. 40, 34132, Kassel, Germany.
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30
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Wang Z, Cao M, Shao G, Zhang Z, Yu H, Chen Y, Zhang Y, Li Y, Xu B, Wang Y, Yao J. Coherent Random Lasing in Colloidal Quantum Dot-Doped Polymer-Dispersed Liquid Crystal with Low Threshold and High Stability. J Phys Chem Lett 2020; 11:767-774. [PMID: 31934764 DOI: 10.1021/acs.jpclett.9b03409] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
High-concentration (2-10 wt %) ZnCdSeS/ZnS alloyed quantum dot-doped polymer-dispersed liquid crystals (QD-PDLCs) were prepared via ultraviolet (UV) curing. The QD-PDLC morphology and resonance characteristics of a coherent random laser were investigated. The doping concentration of the liquid crystal and quantum dots was varied to investigate its effect on the lasing threshold, line width, and stability with respect to the density and grain size of the liquid crystal droplets inside the PDLC structure. Furthermore, the QD-PDLC laser performance was influenced by the pump position and area because of spatial localization of the random resonators. Moreover, the QD-PDLC showed good long-term stability; after 15 days of laser excitation (3 h/day), the laser output was maintained at 92% of the original emission intensity. The random laser threshold was as low as 50 μJ/cm2 with the optimized preparation process, which suggested strong potential for applications in polymer random fiber lasers, sensors, and displays.
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Affiliation(s)
- Zhiwen Wang
- Faculty of Intelligent Manufacturing , Wuyi University , Jiangmen 529020 , China
| | - Mingxuan Cao
- Faculty of Intelligent Manufacturing , Wuyi University , Jiangmen 529020 , China
- Research Center for Polymer Engineering of Intelligent Manufacturing , Wuyi University , Jiangmen 529020 , China
| | - Genrong Shao
- Poly OptoElectronics Tech. Ltd , Jiangmen 529020 , China
| | - Zhikun Zhang
- Poly OptoElectronics Tech. Ltd , Jiangmen 529020 , China
| | - Huiwen Yu
- Faculty of Intelligent Manufacturing , Wuyi University , Jiangmen 529020 , China
- Research Center for Polymer Engineering of Intelligent Manufacturing , Wuyi University , Jiangmen 529020 , China
| | - Yeqing Chen
- School of Applied Physics and Materials , Wuyi University , Jiangmen 529020 , China
| | - Yating Zhang
- College of Precision Instruments and Optoelectronics Engineering , Tianjin University , Tianjin 300072 , China
| | - Yang Li
- Poly OptoElectronics Tech. Ltd , Jiangmen 529020 , China
| | - Baiping Xu
- Faculty of Intelligent Manufacturing , Wuyi University , Jiangmen 529020 , China
- Research Center for Polymer Engineering of Intelligent Manufacturing , Wuyi University , Jiangmen 529020 , China
| | - Ying Wang
- Faculty of Intelligent Manufacturing , Wuyi University , Jiangmen 529020 , China
| | - Jianquan Yao
- College of Precision Instruments and Optoelectronics Engineering , Tianjin University , Tianjin 300072 , China
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31
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Jia J, Huang G, Wang M, Lv Y, Chen X, Deng J, Pan K. Multi-functional stretchable sensors based on a 3D-rGO wrinkled microarchitecture. NANOSCALE ADVANCES 2019; 1:4406-4414. [PMID: 36134427 PMCID: PMC9419508 DOI: 10.1039/c9na00429g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/08/2019] [Accepted: 09/23/2019] [Indexed: 06/16/2023]
Abstract
The structural design of sensing active layers plays a critical role in the development of electromechanical sensors. In this study, we established an innovative concept for constructing sensors, pre-straining & laser reduction (PS&LR), based on a laser-induced wrinkle effect. This method combines and highlights the advantages of a wrinkled structure in the flexibility of sensors and the advantages of laser in the efficient reduction of GO; thus, it can efficiently introduce tunable, stretchable 3D-rGO expansion bulges in wrinkled GO films. Particularly, the sensors based on this special structure (1.5 cm × 3 cm) demonstrated a multi-functional and distinguished sensing ability in the cases of bending, stretching and touching modes. Moreover, the 3D-rGO architecture endowed the sensors with great sensitivity and design flexibility, i.e., a high sensing factor of 122, relative current value change of 60 times at the bending angle of 60°, decreased relative resistance-strain curve and diverse bending strategies for various detection purposes. Thus, the established design and preparation strategy provides large design flexibility for various promising applications.
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Affiliation(s)
- Jin Jia
- College of Materials Science and Engineering, Beijing University of Chemical Technology Beijing 100029 China
| | - Guotao Huang
- College of Materials Science and Engineering, Beijing University of Chemical Technology Beijing 100029 China
| | - Mingti Wang
- College of Materials Science and Engineering, Beijing University of Chemical Technology Beijing 100029 China
| | - Yuhuan Lv
- College of Materials Science and Engineering, Beijing University of Chemical Technology Beijing 100029 China
| | - Xiangyang Chen
- College of Materials Science and Engineering, Beijing University of Chemical Technology Beijing 100029 China
| | - Jianping Deng
- College of Materials Science and Engineering, Beijing University of Chemical Technology Beijing 100029 China
| | - Kai Pan
- College of Materials Science and Engineering, Beijing University of Chemical Technology Beijing 100029 China
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32
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Amplified Spontaneous Emission and Lasing in Lead Halide Perovskites: State of the Art and Perspectives. APPLIED SCIENCES-BASEL 2019. [DOI: 10.3390/app9214591] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Lead halide perovskites are currently receiving increasing attention due to their potential to combine easy active layers fabrication, tunable electronic and optical properties with promising performance of optoelectronic and photonic device prototypes. In this paper, we review the main development steps and the current state of the art of the research on lead halide perovskites amplified spontaneous emission and on optically pumped lasers exploiting them as active materials.
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33
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Hsu YT, Tai CT, Wu HM, Hou CF, Liao YM, Liao WC, Haider G, Hsiao YC, Lee CW, Chang SW, Chen YH, Wu MH, Chou RJ, Bera KP, Lin YY, Chen YZ, Kataria M, Lin SY, Paul Inbaraj CR, Lin WJ, Lee WY, Lin TY, Lai YC, Chen YF. Self-Healing Nanophotonics: Robust and Soft Random Lasers. ACS NANO 2019; 13:8977-8985. [PMID: 31390182 DOI: 10.1021/acsnano.9b02858] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Self-healing technology promises a generation of innovation in cross-cutting subjects ranging from electronic skins, to wearable electronics, to point-of-care biomedical sensing modules. Recently, scientists have successfully pulled off significant advances in self-healing components including sensors, energy devices, transistors, and even integrated circuits. Lasers, one of the most important light sources, integrated with autonomous self-healability should be endowed with more functionalities and opportunities; however, the study of self-healing lasers is absent in all published reports. Here, the soft and self-healable random laser (SSRL) is presented. The SSRL can not only endure extreme external strain but also withstand several cutting/healing test cycles. Particularly, the damaged SSRL enables its functionality to be restored within just few minutes without the need of additional energy, chemical/electrical agents, or other healing stimuli, truly exhibiting a supple yet robust laser prototype. It is believed that SSRL can serve as a vital building block for next-generation laser technology as well as follow-on self-healing optoelectronics.
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Affiliation(s)
- Yun-Tzu Hsu
- Department of Physics , National Taiwan University , Taipei 10617 , Taiwan
| | - Chia-Tse Tai
- Department of Physics , National Taiwan University , Taipei 10617 , Taiwan
| | - Hsing-Mei Wu
- Department of Materials Science and Engineering , National Chung Hsing University , Taichung 40227 , Taiwan
| | - Cheng-Fu Hou
- Institute of Optoelectronic Sciences , National Taiwan Ocean University , Keelung 202 , Taiwan
| | - Yu-Ming Liao
- Department of Physics , National Taiwan University , Taipei 10617 , Taiwan
| | - Wei-Cheng Liao
- Department of Physics , National Taiwan University , Taipei 10617 , Taiwan
| | - Golam Haider
- Department of Physics , National Taiwan University , Taipei 10617 , Taiwan
| | - Yung-Chi Hsiao
- Department of Materials Science and Engineering , National Chung Hsing University , Taichung 40227 , Taiwan
| | - Chi-Wei Lee
- Research and Development Center for Smart Textile Technology and Department of Chemical Engineering and Biotechnology , National Taipei University of Technology , Taipei 106 , Taiwan
| | - Shu-Wei Chang
- Department of Physics , National Taiwan University , Taipei 10617 , Taiwan
| | - Ying-Huan Chen
- Department of Physics , National Taiwan University , Taipei 10617 , Taiwan
| | - Min-Hsuan Wu
- Department of Physics , National Taiwan University , Taipei 10617 , Taiwan
| | - Rou-Jun Chou
- Department of Physics , National Taiwan University , Taipei 10617 , Taiwan
| | | | - Yen-Yu Lin
- Department of Physics , National Taiwan University , Taipei 10617 , Taiwan
| | - Yi-Zih Chen
- Department of Physics , National Taiwan University , Taipei 10617 , Taiwan
| | - Monika Kataria
- Department of Physics , National Taiwan University , Taipei 10617 , Taiwan
| | - Shih-Yao Lin
- Department of Physics , National Taiwan University , Taipei 10617 , Taiwan
| | | | - Wei-Ju Lin
- Department of Physics , National Taiwan University , Taipei 10617 , Taiwan
| | - Wen-Ya Lee
- Research and Development Center for Smart Textile Technology and Department of Chemical Engineering and Biotechnology , National Taipei University of Technology , Taipei 106 , Taiwan
| | - Tai-Yuan Lin
- Institute of Optoelectronic Sciences , National Taiwan Ocean University , Keelung 202 , Taiwan
| | - Ying-Chih Lai
- Department of Materials Science and Engineering , National Chung Hsing University , Taichung 40227 , Taiwan
- Research Center for Sustainable Energy and Nanotechnology, Innovation and Development Center of Sustainable Agriculture , National Chung Hsing University , Taichung 40227 , Taiwan
| | - Yang-Fang Chen
- Department of Physics , National Taiwan University , Taipei 10617 , Taiwan
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34
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Flexible Random Laser Using Silver Nanoflowers. Polymers (Basel) 2019; 11:polym11040619. [PMID: 30960602 PMCID: PMC6523250 DOI: 10.3390/polym11040619] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2019] [Revised: 03/23/2019] [Accepted: 04/02/2019] [Indexed: 11/24/2022] Open
Abstract
A random laser was achieved in a polymer membrane with silver nanoflowers on a flexible substrate. The strong confinement of the polymer waveguide and the localized field enhancement of silver nanoflowers were essential for the low-threshold random lasing action. The lasing wavelength can be tuned by bending the flexible substrate. The solution phase synthesis of the silver nanoflowers enables easy realization of this type of random lasers. The flexible and high-efficiency random lasers provide favorable factors for the development of imaging and sensing devices.
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35
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Jia J, Huang G, Deng J, Pan K. Skin-inspired flexible and high-sensitivity pressure sensors based on rGO films with continuous-gradient wrinkles. NANOSCALE 2019; 11:4258-4266. [PMID: 30565627 DOI: 10.1039/c8nr08503j] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Flexible electronic devices have received more and more attention. In particular, for pressure sensors, traditional methods for improving sensing performances are mostly based on the construction of microstructured templates. However, it still remains significantly challenging to conveniently fabricate thin-film sensors which possess flexibility, high sensitivity and location detection ability. Inspired by the microstructure of the human skin surface, herein, a new pressure sensor with a hierarchical structure and gradient reduced graphene oxide (rGO) wrinkles is reported. Benefiting from the skin-like structure, the pressure sensor demonstrates outstanding sensitivity, reaching 178 kPa-1; it can also detect pressure as small as 42 Pa. Furthermore, the concept of designing and constructing a gradient structure has been applied to achieve position detection, which is expected to find practical applications in human motion detection.
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Affiliation(s)
- Jin Jia
- College of Materials Science and Engineering (CMSE), Beijing University of Chemical Technology, Chaoyang District North Third Ring Road 15, Beijing 100029, China.
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36
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Anni M, Rhee D, Lee WK. Random Lasing Engineering in Poly-(9-9dioctylfluorene) Active Waveguides Deposited on Wrinkles Corrugated Surfaces. ACS APPLIED MATERIALS & INTERFACES 2019; 11:9385-9393. [PMID: 30732449 DOI: 10.1021/acsami.8b18187] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
This paper investigates the correlation between the random lasing properties of organic waveguides made by poly-(9-9dioctylfluorene) (PFO) thin films and the morphology of wrinkled corrugated substrates. The capability to individually control the wrinkle wavelength, shape, and height allows us to separately investigate their role on the sample emission properties. We demonstrate that the main parameter determining the presence of coherent random lasing is the substrate roughness and that, contrary to what could be qualitatively expected, as the roughness increases, coherent random lasing is progressively reduced. Coherent random lasing is observed only for a substrate roughness below 33 nm, while higher roughness leads to amplified spontaneous emission (up to 70 nm) or to the absence of light amplification in the film (above 70 nm). We demonstrate that this result is due to a progressive reduction of the light amplification efficiency in the PFO film, evidencing that coherent random lasing can be obtained only with a right interplay between light amplification and scattering. Besides clarifying the basic aspects of random lasing in organic waveguides, our work opens the way to the realization of organic random lasers with predictable emission properties, thanks to the high control level of the scattering properties of the wrinkled corrugated surfaces.
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Affiliation(s)
- Marco Anni
- Dipartimento di Matematica e Fisica "Ennio De Giorgi" , Universitá del Salento , Via per Arnesano , 73100 Lecce , Italy
| | - Dongjoon Rhee
- Department of Materials Science and Engineering , Northwestern University , Evanston , Illinois 60208 , United States
| | - Won-Kyu Lee
- Department of Materials Science and Engineering , Northwestern University , Evanston , Illinois 60208 , United States
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37
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Zong C, Azhar U, Zhou C, Wang J, Zhang L, Cao Y, Zhang S, Jiang S, Lu C. Photocontrollable Wrinkle Morphology Evolution on Azo-Based Multilayers for Hierarchical Surface Micropatterns Fabrication. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:2601-2609. [PMID: 30681862 DOI: 10.1021/acs.langmuir.8b04237] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Inspired by nature, comprehensive understanding and ingenious utilization of the self-organized wrinkling behaviors of the sandwiched multilayer bonded on substrates are important for engineering and/or functional laminated devices design. Herein, we report a facile and effective strategy to regulate the wrinkles morphology evolution and the resultant hierarchical surface micropatterns on azobenzene-based laminated multilayers by visible-light irradiation. Revealed by systematic experiments, the photocontrolled dynamic wrinkle evolutions are triggered by the reversible photoisomerization of azobenzene in the top azopolymer film and are strongly dependent on the intermediate photoinert layers (e.g., polystyrene and oxygen plasma-induced SiO x layer) with the wrinkle-reinforcing effect or the stress relaxation acceleration effect. Interestingly, large-area well-defined hierarchical surface wrinkle patterns could be fabricated on the multilayers upon selective exposure. In the unexposed region, the wrinkles evolved into highly oriented patterns, whereas in the exposed region, they were fully erased or evolved into smaller-wavelength wrinkles. This study not only sheds light on the morphological evolution of the wrinkling laminated composites in engineering and nature but also paves a new avenue to conveniently and controllably realize the hierarchical stimulus-responsive surface patterns.
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Affiliation(s)
- Chuanyong Zong
- Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials, School of Chemistry and Chemical Engineering , University of Jinan , Jinan 250022 , P. R. China
| | - Umair Azhar
- Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials, School of Chemistry and Chemical Engineering , University of Jinan , Jinan 250022 , P. R. China
| | - Chunhua Zhou
- Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials, School of Chemistry and Chemical Engineering , University of Jinan , Jinan 250022 , P. R. China
| | - Juanjuan Wang
- School of Materials Science and Engineering , Tianjin University , Tianjin 300072 , P. R. China
| | - Luqing Zhang
- Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials, School of Chemistry and Chemical Engineering , University of Jinan , Jinan 250022 , P. R. China
| | - Yanping Cao
- AML, Department of Engineering Mechanics , Tsinghua University , Beijing 100084 , P. R. China
| | - Shuxiang Zhang
- Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials, School of Chemistry and Chemical Engineering , University of Jinan , Jinan 250022 , P. R. China
| | - Shichun Jiang
- School of Materials Science and Engineering , Tianjin University , Tianjin 300072 , P. R. China
| | - Conghua Lu
- School of Materials Science and Engineering , Tianjin University , Tianjin 300072 , P. R. China
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Haider G, Lin HI, Yadav K, Shen KC, Liao YM, Hu HW, Roy PK, Bera KP, Lin KH, Lee HM, Chen YT, Chen FR, Chen YF. A Highly-Efficient Single Segment White Random Laser. ACS NANO 2018; 12:11847-11859. [PMID: 30352157 DOI: 10.1021/acsnano.8b03035] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Production of multicolor or multiple wavelength lasers over the full visible-color spectrum from a single chip device has widespread applications, such as superbright solid-state lighting, color laser displays, light-based version of Wi-Fi (Li-Fi), and bioimaging, etc. However, designing such lasing devices remains a challenging issue owing to the material requirements for producing multicolor emissions and sophisticated design for producing laser action. Here we demonstrate a simple design and highly efficient single segment white random laser based on solution-processed NaYF4:Yb/Er/Tm@NaYF4:Eu core-shell nanoparticles assisted by Au/MoO3 multilayer hyperbolic meta-materials. The multicolor lasing emitted from core-shell nanoparticles covering the red, green, and blue, simultaneously, can be greatly enhanced by the high photonic density of states with a suitable design of hyperbolic meta-materials, which enables decreasing the energy consumption of photon propagation. As a result, the energy upconversion emission is enhanced by ∼50 times with a drastic reduction of the lasing threshold. The multiple scatterings arising from the inherent nature of the disordered nanoparticle matrix provide a convenient way for the formation of closed feedback loops, which is beneficial for the coherent laser action. The experimental results were supported by the electromagnetic simulations derived from the finite-difference time-domain (FDTD) method. The approach shown here can greatly simplify the design of laser structures with color-tunable emissions, which can be extended to many other material systems. Together with the characteristics of angle free laser action, our device provides a promising solution toward the realization of many laser-based practical applications.
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Affiliation(s)
- Golam Haider
- Department of Engineering and System Science , National Tsing Hua University , Hsinchu 300 , Taiwan
- Nano-Science and Technology Program, Taiwan International Graduate Program , Academia Sinica , Taipei 115 , Taiwan
- Department of Physics , National Taiwan University , Taipei 106 , Taiwan
- J Heyrovský Institute of Physical Chemistry , Academy of Sciences of the Czech Republic , Prague 8 , Czechia
| | - Hung-I Lin
- Department of Physics , National Taiwan University , Taipei 106 , Taiwan
| | - Kanchan Yadav
- Nano-Science and Technology Program, Taiwan International Graduate Program , Academia Sinica , Taipei 115 , Taiwan
- Department of Chemistry , National Taiwan University , Taipei 106 , Taiwan
| | - Kun-Ching Shen
- Research Center for Applied Sciences , Academia Sinica , Taipei 115 , Taiwan
| | - Yu-Ming Liao
- Department of Engineering and System Science , National Tsing Hua University , Hsinchu 300 , Taiwan
- Department of Physics , National Taiwan University , Taipei 106 , Taiwan
| | - Han-Wen Hu
- Department of Physics , National Taiwan University , Taipei 106 , Taiwan
| | - Pradip Kumar Roy
- Department of Physics , National Taiwan University , Taipei 106 , Taiwan
| | - Krishna Prasad Bera
- Nano-Science and Technology Program, Taiwan International Graduate Program , Academia Sinica , Taipei 115 , Taiwan
- Department of Physics , National Taiwan University , Taipei 106 , Taiwan
| | - Kung-Hsuan Lin
- Institute of Physics , Academia Sinica , Taipei 115 , Taiwan
| | - Hsien-Ming Lee
- Institute of Chemistry , Academia Sinica , Taipei 115 , Taiwan
| | - Yit-Tsong Chen
- Department of Chemistry , National Taiwan University , Taipei 106 , Taiwan
| | - Fu-Rong Chen
- Department of Engineering and System Science , National Tsing Hua University , Hsinchu 300 , Taiwan
| | - Yang-Fang Chen
- Department of Physics , National Taiwan University , Taipei 106 , Taiwan
- Advanced Research Center for Green Materials Science and Technology , National Taiwan University , Taipei 106 , Taiwan
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Ding J, Fang H, Lian Z, Lv Q, Sun JL, Yan Q. High-performance stretchable photodetector based on CH 3NH 3PbI 3 microwires and graphene. NANOSCALE 2018; 10:10538-10544. [PMID: 29808184 DOI: 10.1039/c8nr03108h] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
A stretchable photodetector was fabricated by releasing a prestrained 3 M very high bond (VHB) substrate coated with perovskite CH3NH3PbI3 microwires and graphene. The light harvesting CH3NH3PbI3 microwires were realized through a transformation from CH3NH3PbI3 bulk single crystals. Graphene served as an expressway for photoinduced carriers in the perovskite. Under a very low working voltage bias of 0.01 V and irradiance power of 13.5 mW cm-2 under 785 nm laser illumination, the responsivity could be as high as 2.2 mA W-1. When the device was stretched up to 30%, 50%, and 80% strain, the responsivity was maintained at 0.96, 0.60, and 0.21 mA W-1, respectively. It also showed a fast photoresponse (<0.12 s) after stretching to 10%, 30%, 50%, 80%, and even to 100%. The device performed well after 100 cycles of stretching to 50% strain.
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Affiliation(s)
- Jie Ding
- Department of Chemistry, Tsinghua University, Beijing 100084, China.
| | - Huajing Fang
- Department of Chemistry, Tsinghua University, Beijing 100084, China.
| | - Zhipeng Lian
- Department of Chemistry, Tsinghua University, Beijing 100084, China.
| | - Qianrui Lv
- Department of Chemistry, Tsinghua University, Beijing 100084, China.
| | - Jia-Lin Sun
- Collaborative Innovation Center of Quantum Matter, State Key Laboratory of Low-Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing 100084, China
| | - Qingfeng Yan
- Department of Chemistry, Tsinghua University, Beijing 100084, China.
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40
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Chang SW, Liao WC, Liao YM, Lin HI, Lin HY, Lin WJ, Lin SY, Perumal P, Haider G, Tai CT, Shen KC, Chang CH, Huang YF, Lin TY, Chen YF. A White Random Laser. Sci Rep 2018; 8:2720. [PMID: 29426912 PMCID: PMC5807428 DOI: 10.1038/s41598-018-21228-w] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2017] [Accepted: 01/31/2018] [Indexed: 11/24/2022] Open
Abstract
Random laser with intrinsically uncomplicated fabrication processes, high spectral radiance, angle-free emission, and conformal onto freeform surfaces is in principle ideal for a variety of applications, ranging from lighting to identification systems. In this work, a white random laser (White-RL) with high-purity and high-stability is designed, fabricated, and demonstrated via the cost-effective materials (e.g., organic laser dyes) and simple methods (e.g., all-solution process and self-assembled structures). Notably, the wavelength, linewidth, and intensity of White-RL are nearly isotropic, nevertheless hard to be achieved in any conventional laser systems. Dynamically fine-tuning colour over a broad visible range is also feasible by on-chip integration of three free-standing monochromatic laser films with selective pumping scheme and appropriate colour balance. With these schematics, White-RL shows great potential and high application values in high-brightness illumination, full-field imaging, full-colour displays, visible-colour communications, and medical biosensing.
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Affiliation(s)
- Shu-Wei Chang
- Department of Physics, National Taiwan University, Taipei, 10617, Taiwan
| | - Wei-Cheng Liao
- Department of Physics, National Taiwan University, Taipei, 10617, Taiwan
| | - Yu-Ming Liao
- Department of Physics, National Taiwan University, Taipei, 10617, Taiwan
| | - Hung-I Lin
- Department of Physics, National Taiwan University, Taipei, 10617, Taiwan
| | - Hsia-Yu Lin
- Department of Physics, National Taiwan University, Taipei, 10617, Taiwan
| | - Wei-Ju Lin
- Department of Physics, National Taiwan University, Taipei, 10617, Taiwan
| | - Shih-Yao Lin
- Department of Physics, National Taiwan University, Taipei, 10617, Taiwan
| | - Packiyaraj Perumal
- Department of Physics, National Taiwan University, Taipei, 10617, Taiwan
| | - Golam Haider
- Department of Physics, National Taiwan University, Taipei, 10617, Taiwan
| | - Chia-Tse Tai
- Department of Physics, National Taiwan University, Taipei, 10617, Taiwan
| | - Kun-Ching Shen
- Research Center for Applied Sciences, Academia Sinica, Taipei, 10617, Taiwan
| | - Cheng-Han Chang
- Department of Physics, National Taiwan University, Taipei, 10617, Taiwan
| | - Yuan-Fu Huang
- Department of Physics, National Taiwan University, Taipei, 10617, Taiwan
| | - Tai-Yuan Lin
- Institute of Optoelectronic Sciences, National Taiwan Ocean University, Keelung, 202, Taiwan
| | - Yang-Fang Chen
- Department of Physics, National Taiwan University, Taipei, 10617, Taiwan.
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