Low-Dimensional Perovskites: Physical Properties and Applications

A special issue of Nanomaterials (ISSN 2079-4991).

Deadline for manuscript submissions: closed (22 December 2020) | Viewed by 6761

Special Issue Editor

Applied Physics Department and Institute of Materials Science, University of Valencia, P.O. Box 22085, 46071 Valencia, Spain
Interests: optical properties; optical micro-spectroscopy; light-matter interaction; exciton recombination dynamics; low-dimensional semiconductors; quantum dots; quantum wells; 2D semiconductors; metal halide perovskites; nanomaterials; nanocrystals; metal nanoparticles; photonics; plasmonics; photodetectors
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Special Issue Information

Dear Colleagues,

Metal halide perovskites (MHPs) with the general formula ABX3 (A = organic, alcaline; B = Pb, Sn; X = Br) are successfully being used in photovoltaics with power conversion efficiencies greater than 25%, but also in optoelectronic devices as well as diverse applications in photonics. More recently the so-called 2D and 2D/3D organic–inorganic perovskites, or Ruddlesden–Popper and Dion–Jacobson layered perovskites, have attracted attention because they can lead to more stable optoelectronic devices.  However, organometal halide perovskites can be also chemically synthesized with 1D and even 0D structures, even if these low-dimensional materials are still mostly unexplored. The 2D semiconductor perovskites are characterized by large exciton binding energies due to the two-dimensional dielectric environment which enhances the electron-hole Coulomb interaction. This property is good for emitting devices, but it will lead to worse transport and efficiency in solar cells. On the other hand, perovskite nanocrystals can also exhibit quantum size confinement in one (nanoplatelets, nanosheets, etc.) to three directions (nanocubes, nanospheres) by controlling chemical synthesis conditions.

This Special Issue will be focused on basic research related to the preparation of low dimensional perovskite and perovskite-like materials in the form of thin films and nanocrystals (containing lead, but also lead-free), together with their structural, electronic, optical and electrical properties. Of course, studies on current and prospective applications (solar cells, photodetectors, LEDs, stimulated emission and lasing, photonics, etc.) of these materials are also welcome for the present special issue.

Prof. Dr. Juan P. Martínez Pastor
Guest Editor

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Published Papers (1 paper)

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Review

30 pages, 4228 KiB  
Review
Advances in Perovskite Light-Emitting Diodes Possessing Improved Lifetime
Nanomaterials 2021, 11(1), 103; https://doi.org/10.3390/nano11010103 - 04 Jan 2021
Cited by 14 | Viewed by 6154
Abstract
Recently, perovskite light-emitting diodes (PeLEDs) are seeing an increasing academic and industrial interest with a potential for a broad range of technologies including display, lighting, and signaling. The maximum external quantum efficiency of PeLEDs can overtake 20% nowadays, however, the lifetime of PeLEDs [...] Read more.
Recently, perovskite light-emitting diodes (PeLEDs) are seeing an increasing academic and industrial interest with a potential for a broad range of technologies including display, lighting, and signaling. The maximum external quantum efficiency of PeLEDs can overtake 20% nowadays, however, the lifetime of PeLEDs is still far from the demand of practical applications. In this review, state-of-the-art concepts to improve the lifetime of PeLEDs are comprehensively summarized from the perspective of the design of perovskite emitting materials, the innovation of device engineering, the manipulation of optical effects, and the introduction of advanced encapsulations. First, the fundamental concepts determining the lifetime of PeLEDs are presented. Then, the strategies to improve the lifetime of both organic-inorganic hybrid and all-inorganic PeLEDs are highlighted. Particularly, the approaches to manage optical effects and encapsulations for the improved lifetime, which are negligibly studied in PeLEDs, are discussed based on the related concepts of organic LEDs and Cd-based quantum-dot LEDs, which is beneficial to insightfully understand the lifetime of PeLEDs. At last, the challenges and opportunities to further enhance the lifetime of PeLEDs are introduced. Full article
(This article belongs to the Special Issue Low-Dimensional Perovskites: Physical Properties and Applications)
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