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Nanomaterials
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Low-Dimensional Perovskite Materials and Devices
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Low-Dimensional Perovskite Materials and Devices

A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Nanophotonics Materials and Devices".

Deadline for manuscript submissions: 6 June 2025 | Viewed by 3496

Special Issue Editors

Dr. Junke Jiang

E-Mail Website
Guest Editor
CNRS, University of Rennes, INSA Rennes, Institute FOTON—UMR 6082, F-35000 Rennes, France
Interests: molecular dynamics modeling; multiscale simulation of nano-micro structures; optoelectronic properties of semiconductors and devices
Special Issues, Collections and Topics in MDPI journals
Dr. Qiuhua Liang

E-Mail Website
Guest Editor
Department of Physics, Chalmers University of Technology, SE-412 96 Gothenburg, Sweden
Interests: density functional theory; multi-scale methods; low-dimensional materials; semiconductor devices

Special Issue Information

Dear Colleagues,

Three-dimensional (3D) metal halide perovskites (MHPs) have rapidly emerged as one of the hottest topics due to their excellent optoelectronic properties and solution processability. Their high absorption coefficients, long charge-carrier diffusion length, tunable bandgap, and low-cost processability are among the most attractive advantages of perovskite materials. These merits have enabled the development of optoelectronic devices with record efficiency, such as solar cells and light-emitting diodes (LEDs), that are comparable to those of standard commercialized devices.

Beyond 3D MHPs, low-dimensional perovskites (2D, 1D, and even 0D) with unique crystal structures that incorporate larger, less volatile, and generally more hydrophobic organic cations exhibit improved thermal, chemical, and environmental stability, thus leading to more stable optoelectronic devices. Moreover, low-dimensional perovskites can play different roles within optoelectronic devices, either as primary materials or as a capping layer on top of a 3D perovskite layer (e.g., 2D/3D perovskite heterostructure). Reducing the crystal dimension of perovskite will result in quantum and dielectric confinements, leading to larger optical band gaps and exciton-binding energies. Topics to be covered within this Special Issue include, but are not limited to, the following:

  • Synthesis and characterization of perovskite and low-dimensional perovskite materials;
  • Fundamental studies of perovskite materials (structural stability, electronic, phonons, optical, defects, and charge transport, etc.);
  • Optoelectronic applications of perovskite and low-dimensional perovskite materials (solar cells, LEDs, lasers, photodetectors, X-ray imaging, photonic devices, flexible and integrated devices, etc.);
  • Modeling and theoretical studies (first-principles simulations, molecular dynamics simulations, and device simulations);
  • Environmental impact and sustainability of perovskite and low-dimensional perovskite materials and devices;
  • Experimental and theoretical study on perovskite-like materials and devices.

We welcome original research articles, reviews, and perspectives covering these topics and related areas. This Special Issue aims to provide a platform for researchers to share their latest findings and insights, and we look forward to publishing high-quality research in this exciting field. The contributions of researchers in this Special Issue will enhance our understanding of perovskite and low-dimensional perovskite materials and ultimately advance the development of perovskite-based materials and devices to achieve a sustainable future. This Special Issue will be focused on basic research related to materials and devices in the form of thin films and nanocrystals.

We look forward to receiving your submissions.

Dr. Junke Jiang
Dr. Qiuhua Liang
Guest Editors

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. Nanomaterials 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 2400 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

  • low-dimensional perovskite
  • synthesis techniques
  • crystal structures
  • optoelectronics
  • device physics
  • simulations

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Published Papers (3 papers)

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Research

18 pages, 4179 KiB  
Article
Enhancing the Morpho-Structural Stability of FAPbBr3 Solar Cells via 2D Nanoscale Layer Passivation of the Perovskite Interface: An In-Situ XRD Study
by Barbara Paci, Flavia Righi Riva, Amanda Generosi, Marco Guaragno, Jessica Barichello, Fabio Matteocci and Aldo Di Carlo
Nanomaterials 2025, 15(5), 327; https://doi.org/10.3390/nano15050327 - 20 Feb 2025
Viewed by 667
Abstract
Despite the huge progress achieved in the optimization of perovskite solar cell (PSC) performance, stability remains a limiting factor for technological commercialization. Here, a study on the photovoltaic, structural and morphological stability of semi-transparent formamidinium lead bromide-based PSCs is presented. This work focuses [...] Read more.
Despite the huge progress achieved in the optimization of perovskite solar cell (PSC) performance, stability remains a limiting factor for technological commercialization. Here, a study on the photovoltaic, structural and morphological stability of semi-transparent formamidinium lead bromide-based PSCs is presented. This work focuses on the positive role of 2D nanoscale layer passivation, induced by perovskite surface treatment with a mixture of iso-Pentylammonium chloride (ISO) and neo-Pentylammonium chloride (NEO). In situ X-ray diffraction (XRD) is applied in combination with atomic force microscopy (AFM), and the results are correlated to the devices’ photovoltaic performances. The superior power conversion efficiency and overall stability of the ISO-NEO system is evidenced, as compared to the un-passivated device, under illumination in air. Furthermore, the role of the ISO-NEO treatments in increasing the morpho-structural stability is clarified as follows: a bulk effect resulting in a protective role against the loss in crystallinity of the perovskite 3D phase (observed only for the un-passivated device) and an interface effect, being the observed 2D phase crystallinity loss spatially localized at the interface with the 3D phase where a higher concentration of defects is expected. Importantly, the complete stability of the device is achieved with the passivated ISO-NEO-encapsulated device, allowing us to exclude the intrinsic degradation effects. Full article
(This article belongs to the Special Issue Low-Dimensional Perovskite Materials and Devices)
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12 pages, 2296 KiB  
Article
Effects of Homogeneous Doping on Electron–Phonon Coupling in SrTiO3
by Minwoo Park and Suk Bum Chung
Nanomaterials 2025, 15(2), 137; https://doi.org/10.3390/nano15020137 - 17 Jan 2025
Viewed by 798
Abstract
Bulk n-type SrTiO3 (STO) has long been known to possess a superconducting ground state at an exceptionally dilute carrier density. This has raised questions about the applicability of the BCS-Eliashberg paradigm with its underlying adiabatic assumption. However, recent experimental reports have set [...] Read more.
Bulk n-type SrTiO3 (STO) has long been known to possess a superconducting ground state at an exceptionally dilute carrier density. This has raised questions about the applicability of the BCS-Eliashberg paradigm with its underlying adiabatic assumption. However, recent experimental reports have set the pairing gap to the critical temperature (Tc) ratio at the BCS value for superconductivity in Nb-doped STO, even though the adiabaticity condition the BCS pairing requires is satisfied over the entire superconducting dome only by the lowest branch of optical phonons. In spite of the strong implications these reports have on specifying the pairing glue, they have not proved sufficient in explaining the magnitude of the optimal doping. This motivated us to apply density functional theory to Nb-doped STO to analyze how the phonon band structures and the electron–phonon coupling evolve with doping. To describe the very low doping concentration, we tuned the homogeneous background charge, from which we obtained a first-principles result on the doping-dependent phonon frequency that is in good agreement with experimental data for Nb-doped STO. Using the EPW code, we obtain the doping-dependent phonon dispersion and the electron–phonon coupling strength. Within the framework of our calculation, we found that the electron–phonon coupling forms a dome in a doping range lower than the experimentally observed superconducting dome of the Nb-doped STO. Additionally, we examined the doping dependence of both the orbital angular momentum quenching in the electron–phonon coupling and the phonon displacement correlation length and found the former to have a strong correlation with our electron–phonon coupling in the overdoped region. Full article
(This article belongs to the Special Issue Low-Dimensional Perovskite Materials and Devices)
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9 pages, 2316 KiB  
Article
Highly Efficient Organic/Silicon Hybrid Solar Cells with a MoO3 Capping Layer
by Jiahui Chen, Zhangbo Lu, Xiaoting Wang, Yuner Luo, Yun Ma, Gang Lou, Dan Chi and Shihua Huang
Nanomaterials 2024, 14(20), 1630; https://doi.org/10.3390/nano14201630 - 11 Oct 2024
Viewed by 1444
Abstract
Organic/Si hybrid solar cells have attracted considerable attention for their uncomplicated fabrication process and superior device efficiency, making them a promising candidate for sustainable energy applications. However, the efficient collection and separation of charge carriers at the organic/Si heterojunction interface are primarily hindered [...] Read more.
Organic/Si hybrid solar cells have attracted considerable attention for their uncomplicated fabrication process and superior device efficiency, making them a promising candidate for sustainable energy applications. However, the efficient collection and separation of charge carriers at the organic/Si heterojunction interface are primarily hindered by the inadequate work function of poly (3,4-ethylenedioxythiophene): poly (styrenesulfonate) (PEDOT:PSS). Here, the application of a high-work-function MoO3 film onto the n-Si/PEDOT:PSS surface leads to a notable enhancement in the device’s built-in potential. This enhancement results in the creation of an inversion layer near the n-Si surface and facilitates charge separation at the interface. Simultaneously, it inhibits charge recombination at the heterojunction interface. As a result, the champion PEDOT:PSS/Si solar cell, which incorporates a MoO3 interface layer, demonstrates an efficiency of 16.0% and achieves a high fill factor of 80.8%. These findings provide a straightforward and promising strategy for promoting the collection and transmission of charge carriers at the interface of photovoltaic devices. Full article
(This article belongs to the Special Issue Low-Dimensional Perovskite Materials and Devices)
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