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Micromachines
Special Issues
Perovskite Semiconductors for Light-Emitting Diodes and Beyond
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Perovskite Semiconductors for Light-Emitting Diodes and Beyond

A special issue of Micromachines (ISSN 2072-666X). This special issue belongs to the section "D1: Semiconductor Devices".

Deadline for manuscript submissions: closed (25 September 2023) | Viewed by 7275

Special Issue Editor

Prof. Dr. Jung Yong Kim

E-Mail Website
Guest Editor
Center of Advanced Materials Science and Engineering, Department of Materials Science and Engineering, Adama Science and Technology University, Adama 1888, Ethiopia
Interests: polymer science; polymer physics; conjugated polymers; perovskite light-emitting diode (LED); perovskite laser; perovskite photovoltaics; perovskite photodetector; perovskite electronics; organic electronics and bioelectronics
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Solution processable metal-halide perovskite is a new class of semiconductor for photovoltaics, photodetector, field-effect transistor, laser, light-emitting diode (LED) and so forth. Among these electronic/optoelectronic applications, the solid-state perovskite LED was first demonstrated by Richard H. Friend’s group in 2014. For this purpose, they used a thin 15 nm layer of three dimensional (3D) CH3NH3PbI3-xClx perovskite in order to spatially confine electrons and holes for bimolecular recombination. Currently, this spatial quantum confinement idea has been further utilized through colloidal quantum dots (QDs) and quasi-two-dimensional (2D) perovskites. In this Special Issue (SI), we have a particular interest in the quasi-2D perovskites with a general formula of L2(SMX3)n-1MX4 where M, X, L, and S are a divalent metal cation, a halide and (organic) cations with long and short chains, respectively. Here, <n> is equal to the number of MX6 monolayer sheets within a layer. If a perovskite semiconductor has only <n> =1, this is 2D perovskite. However, if it has a mixture of several <n> monolayers, we call it quasi-2D perovskites with reduced exciton binding energy and bandgap compared to 2D perovskites. Furthermore, depending on the presence or absence of van der Waals gap in the dielectric layer of long chain cations, we call the structure Ruddlesden-Popper and Dion-Jacobson, respectively. As for the device performances, the state-of-the-art perovskite LEDs have shown more than 20% external quantum efficiency (EQE), promising for low-cost display, lighting and optical communication applications. Finally, we welcome original research and review articles on this SI theme of perovskite LEDs and beyond.

Prof. Dr. Jung Yong Kim
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 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

  • perovskite LED
  • quasi-2D perovskite
  • quantum confinement
  • dielectric confinement
  • perovskite quantum dot
  • perovskite laser
  • perovskite photovoltaics
  • perovskite photodetector
  • perovskite transistor
  • perovskite semiconductor

Published Papers (2 papers)

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Research

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14 pages, 6527 KiB  
Article
All-Inorganic CsPbBr3 Perovskite Nanocrystals Synthesized with Olive Oil and Oleylamine at Room Temperature
by Getachew Welyab, Mulualem Abebe, Dhakshnamoorthy Mani, Aparna Thankappan, Sabu Thomas, Fekadu Gochole Aga and Jung Yong Kim
Micromachines 2023, 14(7), 1332; https://doi.org/10.3390/mi14071332 - 29 Jun 2023
Cited by 5 | Viewed by 2034
Abstract
Room temperature (RT) synthesis of the ternary cesium lead bromide CsPbBr3 quantum dots with oleic acid and oleylamine ligands was developed by Zeng and coworkers in 2016. In their works, the supersaturated recrystallization (SR) was adopted as a processing method without requiring [...] Read more.
Room temperature (RT) synthesis of the ternary cesium lead bromide CsPbBr3 quantum dots with oleic acid and oleylamine ligands was developed by Zeng and coworkers in 2016. In their works, the supersaturated recrystallization (SR) was adopted as a processing method without requiring inert gas and high-temperature injection. However, the oleic acid ligand for haloplumbate is known to be relatively unstable. Hence, in this work, we employed the eco-friendly olive oil to replace the oleic acid portion for the SR process at RT. Resultantly, we found that the cube-shaped nanocrystal has a size of ~40–42 nm and an optical bandgap of ~2.3 eV independent of the surface ligands, but the photoluminescence lifetime (τav) and crystal packing are dependent on the ligand species, e.g., τav = 3.228 ns (olive oil and oleylamine; here less ordered) vs. 1.167 ns (oleic acid and oleylamine). Importantly, we explain the SR mechanism from the viewpoint of the classical LaMer model combined with the solvent engineering technique in details. Full article
(This article belongs to the Special Issue Perovskite Semiconductors for Light-Emitting Diodes and Beyond)
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Review

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24 pages, 2227 KiB  
Review
Sn-Based Perovskite Solar Cells towards High Stability and Performance
by Wafa’ Ayaydah, Eman Raddad and Zafer Hawash
Micromachines 2023, 14(4), 806; https://doi.org/10.3390/mi14040806 - 31 Mar 2023
Cited by 9 | Viewed by 4018
Abstract
Recent years have witnessed rapid development in the field of tin-based perovskite solar cells (TPSCs) due to their environmental friendliness and tremendous potential in the photovoltaic field. Most of the high-performance PSCs are based on lead as the light-absorber material. However, the toxicity [...] Read more.
Recent years have witnessed rapid development in the field of tin-based perovskite solar cells (TPSCs) due to their environmental friendliness and tremendous potential in the photovoltaic field. Most of the high-performance PSCs are based on lead as the light-absorber material. However, the toxicity of lead and the commercialization raise concerns about potential health and environmental hazards. TPSCs can maintain all the optoelectronic properties of lead PSCs, as well as feature a favorable smaller bandgap. However, TPSCs tend to undergo rapid oxidation, crystallization, and charge recombination, which make it difficult to unlock the full potential of such perovskites. Here, we shed light on the most critical features and mechanisms affecting the growth, oxidation, crystallization, morphology, energy levels, stability, and performance of TPSCs. We also investigate the recent strategies, such as interfaces and bulk additives, built-in electric field, and alternative charge transport materials that are used to enhance the performance of the TPSCs. More importantly, we have summarized most of the recent best-performing lead-free and lead-mixed TPSCs. This review aims to help future research in TPSCs to produce highly stable and efficient solar cells. Full article
(This article belongs to the Special Issue Perovskite Semiconductors for Light-Emitting Diodes and Beyond)
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