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Materials
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Progress and Challenges in Perovskite Solar Cells
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Progress and Challenges in Perovskite Solar Cells

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

Deadline for manuscript submissions: closed (20 April 2024) | Viewed by 2955

Special Issue Editor

Dr. Jiangshan Feng

E-Mail Website
Guest Editor
School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, China
Interests: high power conversion efficiency; perovskite solar cells; large area; flexible; roll-to-roll; stability

Special Issue Information

Dear Colleagues,

Organic–inorganic hybrid metal halide perovskite solar cells (PSCs), whose power conversion efficiency (PCE) has increased to as high as 25.5% in only a few years, are regarded as the next-generation photovoltaic technology. In addition, perovskite solar cells can be prepared via a range of methods, such as spin-coating, blading coating, spray coating, slot die, and vacuum deposition. Compared to solution coating techniques, vacuum deposition is the most dominant technology in the thin film semiconductor industry due to its advantages of large-area, high-throughput, contamination-free, and solvent-free deposition, continuous production compatibility, and robustness, etc. Through this process, scalable vacuum deposition can be developed in order to fabricate large-area perovskite films using low-temperature annealing under vacuum.

In this Special Issue, we aim to present high-quality research that develops scalable vacuum deposition in order to fabricate perovskite solar cells and flexible PSCs with a high power conversion efficiency, including studies on novel materials, method investigations, stability measurements, or innovations in device architectures.

Dr. Jiangshan Feng
Guest Editor

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Keywords

  • perovskite solar cells
  • high power conversion efficiency
  • flexible
  • large area
  • roll-to-roll
  • vacuum deposition
  • stability

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Published Papers (2 papers)

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Research

14 pages, 5594 KiB  
Article
Preparation of NaYF4:Tm, Yb, and Gd Luminescent Nanorods/SiO2 Nanospheres Composite Thin Film and Its Application in Perovskite Solar Cells
by Qi Luo, Jian Yu, Xueshuang Deng, Ming Cao, Shifang Ma, Qiongxin Hua, Dan Xue and Fenghui An
Materials 2023, 16(21), 6917; https://doi.org/10.3390/ma16216917 - 27 Oct 2023
Viewed by 1285
Abstract
In this study, we aim to minimize light loss and achieve high power conversion efficiencies (PCE) in perovskite solar cells (PSCs) by employing a spectral conversion film component with antireflection properties. In our scheme, NaYF4:Tm, Yb, and Gd luminescent nanorod/silica nanosphere-based [...] Read more.
In this study, we aim to minimize light loss and achieve high power conversion efficiencies (PCE) in perovskite solar cells (PSCs) by employing a spectral conversion film component with antireflection properties. In our scheme, NaYF4:Tm, Yb, and Gd luminescent nanorod/silica nanosphere-based thin films are applied on CH3NH3PbI3 PSCs to improve the device efficiency. The film was fabricated by spin coating an aged silica sol containing NaYF4:Tm, Yb, and Gd luminescent nanorods. The size and the spectral conversion properties of the NaYF4:Tm, Yb, and Gd luminescent nanorods were controlled by tuning the Gd3+ ion concentration. The microstructure and the transmittance properties of the thin film were controlled by changing the concentration of NaYF4:Tm, Yb, and Gd luminescent nanorod in silica sol. The thin films have excellent spectral conversion properties while exhibiting a maximum transmittance. The photovoltaic performance of PSCs with NaYF4:Tm, Yb, and Gd luminescent nanorod/silica nanosphere-based thin films was systematically investigated. The light transmittance was optimized to 95.1% on a cleaned glass substrate, which resulted in an average increase of about 3.0% across the broadband range of 400–800 nm. The optimized films widen the spectrum of light absorbed by conventional PSC cells and reduce reflections across a broad range, enhancing the photovoltaic performance of PSCs. As a result, the PCE of the PSC increased from 14.51% for the reference device without a thin film to 15.67% for the PSC device with an optimized thin film. This study presents a comprehensive solution to the problem of Fresnel reflection and spectral response mismatch of the PSCs, which provides new ideas for the light management of PSCs. Full article
(This article belongs to the Special Issue Progress and Challenges in Perovskite Solar Cells)
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20 pages, 7020 KiB  
Article
Tuning the Photophysical Properties of Acceptor–Donor–Acceptor Di-2-(2-oxindolin-3-ylidene) Malononitrile Materials via Extended π–Conjugation: A Joint Experimental and Theoretical Study
by Shiwei Ren, Amirhossein Habibi, Pingping Ni, Yuexing Zhang and Abderrahim Yassar
Materials 2023, 16(19), 6410; https://doi.org/10.3390/ma16196410 - 26 Sep 2023
Cited by 4 | Viewed by 1394
Abstract
Many optoelectronic applications require organic semiconductor (OSC) materials with high electron affinity. In this work, a series of novel acceptor–donor–acceptor (A–D–A) materials with low-lying LUMO energy levels were designed and characterized. In this strategy, two acceptor dyes, bis-isatin and di-2-(2-oxindolin-3-ylidene) malononitrile, were connected [...] Read more.
Many optoelectronic applications require organic semiconductor (OSC) materials with high electron affinity. In this work, a series of novel acceptor–donor–acceptor (A–D–A) materials with low-lying LUMO energy levels were designed and characterized. In this strategy, two acceptor dyes, bis-isatin and di-2-(2-oxindolin-3-ylidene) malononitrile, were connected by various π–bridges (benzene ring, benzo[c][1,2,5]thiadiazole, monothiophene, trithiophene). We varied the length of the π–conjugation of the central core and the linkage position of the acceptor core (4- vs. 6-position of the phenyl ring) to investigate the effect on the optical and electrochemical properties of the materials. We performed density functional theory (DFT) and time-dependent DFT (TD–DFT) studies to gain insight into the dyes’ electronic properties by determining the energy levels. Our findings demonstrate that with increasing acceptor strength and π–conjugation length of the core, the wavelength of the longest absorption maximum as well as their respective extinction coefficients are enhanced, which results in band-gap reduction either by lowering the LUMO and/or raising the HOMO energy level of the molecules. The potential practical utility of these materials as electron-transport materials for perovskite solar cells (PSCs) has been demonstrated. Full article
(This article belongs to the Special Issue Progress and Challenges in Perovskite Solar Cells)
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