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Micromachines
Special Issues
Emerging Optoelectronic Materials and Devices
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Emerging Optoelectronic Materials and Devices

A special issue of Micromachines (ISSN 2072-666X). This special issue belongs to the section "A：Physics".

Deadline for manuscript submissions: 30 July 2024 | Viewed by 3135

Special Issue Editor

Dr. Debabrata Das

E-Mail Website
Guest Editor
Department of Aerospace and Mechanical Engineering, The University of Texas at El Paso, El Paso, TX 79968, USA
Interests: ultra-wide bandgap oxide semiconductors; group III-V semiconductor materials; optoelectronic and photovoltaic devices; power electronic devices; quantum structures and devices; photoelectrochemical energy harvesting

Special Issue Information

Dear Colleagues,

In the modern era, we cannot imagine life without optoelectronics. These devices have been extensively used in several contemporary domains, such as fiber-optic communication, medicinal applications, display technology, augmented reality, defense monitoring, remote sensing, and more. By utilizing modern growth strategies, it becomes feasible to identify innovative semiconductors, therefore enabling optoelectronic devices to operate throughout a broad range of electromagnetic wave wavelengths, spanning from deep ultraviolet (DUV) to long-wave infrared (LWIR) regions. Semiconductors possess distinctive characteristics, such as an ability to regulate electrical conductivity and customize bandgaps, making them vital in the realm of optoelectronic technology. In addition, the utilization of sophisticated lithographic methodologies enables a reduction in semiconductor dimensions on a nanoscale scale, hence facilitating the production of optoelectronic devices that possess enhanced capacity, speed, efficiency, compactness, and sensitivity. A wide range of material libraries, from simple binary inorganic to complex organic combinations, have dominated the research field. Furthermore, nanostructures, nanocomposites, quantum configurations, and plasmonic patterns have been heavily used to push the operating limit further. Heterogeneous configurations, such as solid–liquid junctions, hybrid coupling with energy harvesting devices, and multifunctional device configurations, along with the incorporation of novel materials, such as metal–organic frameworks, MXenes, mixed perovskites, etc., have ushered in a new era of optoelectronics research. This Special Issue aims to address such efforts in the domain of optoelectronics research, including novel material systems, unorthodox growth and fabrication processes, innovative device configurations, and advanced characterization techniques.

Dr. Debabrata Das
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. Micromachines is an international peer-reviewed open access monthly 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

  • nanostructure
  • nanocomposite
  • 2-D material
  • confined heterostructure
  • group III-V
  • metal oxide
  • perovskite
  • photodetector
  • light-emitting diode
  • laser
  • photovoltaics

Published Papers (2 papers)

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Research

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12 pages, 2939 KiB  
Article
Perovskite Light-Emitting Devices Based on Solid-State Diffusion In Situ Dynamic Thermal Crystallization
by Chen Chen, Yanni Zhu, Kainan Dou, Chuang Liu, Chao Yu, Sihang Ji and Jin Wang
Micromachines 2023, 14(11), 2084; https://doi.org/10.3390/mi14112084 - 11 Nov 2023
Viewed by 784
Abstract
Due to the excellent photonic and electrical properties of metal halide perovskite materials, perovskite light-emitting devices have the potential to replace OLED devices as the next-generation of commercial light-emitting devices. In this article, we controlled the surface morphology of PbBr2 using an [...] Read more.
Due to the excellent photonic and electrical properties of metal halide perovskite materials, perovskite light-emitting devices have the potential to replace OLED devices as the next-generation of commercial light-emitting devices. In this article, we controlled the surface morphology of PbBr2 using an in situ dynamic thermal crystallization process, which increased the specific surface area of the films and promoted the solid-state diffusion rate. The CsPbBr3 PeLEDs prepared using this method achieved a maximum current efficiency of 7.1 cd/A at the voltage of 5 V, which was 200% higher than devices prepared using traditional spin-coating processes. These results proved that the in situ thermal dynamic crystallization process effectively improved the film quality of perovskite materials. Full article
(This article belongs to the Special Issue Emerging Optoelectronic Materials and Devices)
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Review

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39 pages, 4919 KiB  
Review
Perovskite Solar Cells: A Review of the Latest Advances in Materials, Fabrication Techniques, and Stability Enhancement Strategies
by Rakesh A. Afre and Diego Pugliese
Micromachines 2024, 15(2), 192; https://doi.org/10.3390/mi15020192 - 27 Jan 2024
Cited by 1 | Viewed by 1993
Abstract
Perovskite solar cells (PSCs) are gaining popularity due to their high efficiency and low-cost fabrication. In recent decades, noticeable research efforts have been devoted to improving the stability of these cells under ambient conditions. Moreover, researchers are exploring new materials and fabrication techniques [...] Read more.
Perovskite solar cells (PSCs) are gaining popularity due to their high efficiency and low-cost fabrication. In recent decades, noticeable research efforts have been devoted to improving the stability of these cells under ambient conditions. Moreover, researchers are exploring new materials and fabrication techniques to enhance the performance of PSCs under various environmental conditions. The mechanical stability of flexible PSCs is another area of research that has gained significant attention. The latest research also focuses on developing tin-based PSCs that can overcome the challenges associated with lead-based perovskites. This review article provides a comprehensive overview of the latest advances in materials, fabrication techniques, and stability enhancement strategies for PSCs. It discusses the recent progress in perovskite crystal structure engineering, device construction, and fabrication procedures that has led to significant improvements in the photo conversion efficiency of these solar devices. The article also highlights the challenges associated with PSCs such as their poor stability under ambient conditions and discusses various strategies employed to enhance their stability. These strategies include the use of novel materials for charge transport layers and encapsulation techniques to protect PSCs from moisture and oxygen. Finally, this article provides a critical assessment of the current state of the art in PSC research and discusses future prospects for this technology. This review concludes that PSCs have great potential as a low-cost alternative to conventional silicon-based solar cells but require further research to improve their stability under ambient conditions in view of their definitive commercialization. Full article
(This article belongs to the Special Issue Emerging Optoelectronic Materials and Devices)
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