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Synthesis and Application of Advanced Optical and Optoelectronic Functional Materials

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Optical and Photonic Materials".

Deadline for manuscript submissions: closed (20 November 2023) | Viewed by 4372

Special Issue Editor


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Guest Editor
School of Physics and Materials Science, Guangzhou University, Guangzhou, China
Interests: inorganic luminescence materials; photodetection

Special Issue Information

Dear Colleagues,

In recent years, great progress has been made in optical and optoelectronic materials for special applications in next-generation information technology, clean energy, environmental science, biological and medical technology. In particular, there are great demands in light-emitting materials and displays, Si-based optoelectronics, photodetection and imaging, solar energy harvesting, etc. Therefore, this Special Issue is focused on impressive works related to experimental and theoretical advances in luminescence nanomaterials and ceramics, photodetection materials and protype devices, synthesis of nanomaterials by laser ablation, solar energy utilization, optical control by materials, etc. High-quality manuscripts will be published in the Special Issue after rigorous peer review. We will work hard towards the rapid and wide dissemination of your valuable research results, recent progress, and novel applications in optical and optoelectronic functional materials.

Prof. Dr. Shusheng Pan
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Materials is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • luminescence
  • photodetection
  • solar energy
  • laser ablation

Published Papers (3 papers)

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Research

14 pages, 4859 KiB  
Article
Ultrahigh UV Responsivity Quasi-Two-Dimensional BixSn1−xO2 Films Achieved through Surface Reaction
by Zhihao Xu, Miao Xu, Fang Chen, Rui Zhai, You Wu, Zhuan Zhao and Shusheng Pan
Materials 2023, 16(21), 6988; https://doi.org/10.3390/ma16216988 - 31 Oct 2023
Viewed by 744
Abstract
In this study, quasi-two-dimensional BixSn1−xO2 (BTO) thin films were fabricated using a liquid metal transfer method. The ultraviolet (UV) photodetector based on BTO thin films was constructed, and the ultrahigh responsivity of 589 A/W was observed at 300 [...] Read more.
In this study, quasi-two-dimensional BixSn1−xO2 (BTO) thin films were fabricated using a liquid metal transfer method. The ultraviolet (UV) photodetector based on BTO thin films was constructed, and the ultrahigh responsivity of 589 A/W was observed at 300 nm UV light illumination. Interestingly, by dropping ethanol during light-off period, the recovery time induced by the persistent photoconductivity (PPC) effect is reduced from 1.65 × 103 s to 5.71 s. Furthermore, the recovery time can also be reduced by dropping methanol, propylene glycol, NaNO2, and Na2SO3 after light termination. The working mechanisms are attributed to the rapid consumption of holes stored in BTO thin films by reaction with those solutions. This work demonstrates that the BTO thin films have potential applications in high-performance UV detectors and present an innovation route to weaken the PPC effects in semiconductors by introducing chemical liquids on their surface. Full article
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9 pages, 4873 KiB  
Article
Fluence and Temperature Dependences of Laser-Induced Ultrafast Demagnetization and Recovery Dynamics in L10-FePt Thin Film
by Zhikun Xie, Yuanhai Cai, Meng Tang, Jielin Zhou, Junhao Liu, Jun Peng, Tianran Jiang, Zhong Shi and Zhifeng Chen
Materials 2023, 16(14), 5086; https://doi.org/10.3390/ma16145086 - 19 Jul 2023
Cited by 3 | Viewed by 1024
Abstract
The fundamental mechanisms of ultrafast demagnetization and magnetization recovery processes in ferromagnetic materials remain incompletely understood. The investigation of different dynamic features which depend on various physical quantities requires a more systematic approach. Here, the femtosecond laser-induced demagnetization and recovery dynamics in L [...] Read more.
The fundamental mechanisms of ultrafast demagnetization and magnetization recovery processes in ferromagnetic materials remain incompletely understood. The investigation of different dynamic features which depend on various physical quantities requires a more systematic approach. Here, the femtosecond laser-induced demagnetization and recovery dynamics in L10-Fe0.5Pt0.5 alloy film are studied by utilizing time-resolved magneto-optical Kerr measurements, focusing on their dependences of excitation fluence and ambient temperature over broad ranges. Ultrafast demagnetization dominated by Elliott-Yafet spin-flip scattering, and two-step magnetization recovery processes are found to be involved in all observations. The fast recovery time corresponding to spin–lattice relaxation is much shorter than that of many ferromagnets and increase with excitation fluence. These can be ascribed to the strong spin–orbit coupling (SOC) demonstrated in FePt and the reduction of transient magnetic anisotropy, respectively. Surprisingly, the demagnetization time exhibits no discernible correlation with ambient temperature. Two competitive factors are proposed to account for this phenomenon. On the other hand, the spin–lattice relaxation accelerates as temperature decreases due to enhanced SOC at lower ambient temperature. A semiquantitative analysis is given to get a visualized understanding. These results offer a comprehensive understanding of the dynamic characteristics of ultrafast demagnetization and recovery processes in iron-based materials with strong SOC, highlighting the potential for regulating the magnetization recovery process through temperature and laser fluence adjustments. Full article
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10 pages, 3179 KiB  
Article
Strong Plasmon-Mie Resonance in Si@Pd Core-Ω Shell Nanocavity
by Haomin Guo, Qi Hu, Chengyun Zhang, Haiwen Liu, Runmin Wu and Shusheng Pan
Materials 2023, 16(4), 1453; https://doi.org/10.3390/ma16041453 - 9 Feb 2023
Cited by 2 | Viewed by 2212
Abstract
The surface plasmon resonance (SPR) and localized surface plasmon resonance (LSPR) can be used to enhance the generation of the hot electrons in plasmon metal nanocavity. In this paper, Pd nanomembrane (NMB) is sputtered on the surface of Si nanosphere (NS) on glass [...] Read more.
The surface plasmon resonance (SPR) and localized surface plasmon resonance (LSPR) can be used to enhance the generation of the hot electrons in plasmon metal nanocavity. In this paper, Pd nanomembrane (NMB) is sputtered on the surface of Si nanosphere (NS) on glass substrate to form the Si@Pd core-Ω shell nanocavity. A plasmon-Mie resonance is induced in the nanocavity by coupling the plasmon resonance with the Mie resonance to control the optical property of Si NS. When this nanocavity is excited by near-infrared-1 (NIR-1, 650 nm–900 nm) femtosecond (fs) laser, the luminescence intensity of Si NS is dramatically enhanced due to the synergistic interaction of plasmon and Mie resonance. The generation of resonance coupling regulates resonant mode of the nanocavity to realize multi-dimensional nonlinear optical response, which can be utilized in the fields of biological imaging and nanoscale light source. Full article
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