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Polymers
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Applications of Polymers for Metal Halide Perovskite Optoelectronic Devices
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Applications of Polymers for Metal Halide Perovskite Optoelectronic Devices

A special issue of Polymers (ISSN 2073-4360). This special issue belongs to the section "Polymer Applications".

Deadline for manuscript submissions: closed (5 November 2022) | Viewed by 6531

Special Issue Editors

Prof. Dr. Chunfu Zhang

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Guest Editor
National Engineering Research Center of Wide Band-gap Semiconductor, Wide Bandgap Semiconducor Technology Disciplines State Key Laboratory, Shaanxi Joint Key Laboratory of Graphene, School of Microelectronics, Xidian University, Xi’an 710071, China
Interests: flexible electronic devices and system integration; transient electronics and intergration; novel thin-film solar cells; wide bandgap semiconductor materials and power devices
Special Issues, Collections and Topics in MDPI journals
Dr. He Xi

E-Mail Website
Guest Editor
State Key Discipline Laboratory of Wide Band Gap Semiconductor Technology, Xidian University, Xi’an 710071, China
Interests: perovskite solar cells

Special Issue Information

Dear Colleagues,

Metal halide perovskites have attracted considerable interest in recent years due to their tremendous potential for use in optoelectronic devices, because of their unique combination of properties. Remarkable breakthroughs in perovskite-based solar cells (PSCs) and light-emitting diodes (PeLEDs) have been achieved in a relatively short time. To date, a certified power conversion efficiency over 25% and an external quantum efficiency of over 12% has been achieved for PSCs and PeLEDs, respectively. Perovskite photodetectors and X-ray detectors have also been developed rapidly. Polymers, due to their unique and versatile abilities to manipulate chemical and physical interfacial properties, have emerged as powerful materials for improving the performance of metal halide perovskite-based optoelectronic devices. The successful design and fabrication of new functional polymer materials, such as hole/electron transporting materials, interfacial modifiers and electrodes, is undoubtedly a potential technique to further enhance device performance.

The aim of this Special Issue is to collect state-of-the-art contributions related to various applications of polymers in the field of metal halide perovskite-based optoelectronic devices. This includes, but is not limited to, hole/electron transporting materials, hole injection materials, surface modifiers and defect passivators for perovskite nanocrystals, anodes and their applications in perovskite-based optoelectronic devices. Contributing authors are encouraged to highlight the advantageous features of these polymers as well as to address their current limitations and challenges.

Prof. Dr. Chunfu Zhang
Dr. He Xi
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. Polymers 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 2700 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 solar cells
  • perovskite light-emitting diodes
  • perovskite photodetectors
  • perovskite X-ray detectors
  • hole transport materials
  • electron transport materials
  • hole injection materials
  • surface modification
  • defect engineering
  • anodes
  • cathodes

Published Papers (3 papers)

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Research

15 pages, 2846 KiB  
Article
Interfacial Dipole poly(2-ethyl-2-oxazoline) Modification Triggers Simultaneous Band Alignment and Passivation for Air-Stable Perovskite Solar Cells
by He Xi, Zhicheng Song, Yonggang Guo, Weijia Zhu, Lisong Ding, Weidong Zhu, Dazheng Chen and Chunfu Zhang
Polymers 2022, 14(13), 2748; https://doi.org/10.3390/polym14132748 - 05 Jul 2022
Cited by 2 | Viewed by 1889
Abstract
To promote the performance of perovskite solar cells (PSCs), its theoretical power conversion efficiency (PCE) and high stability, elaborative defect passivation, and interfacial engineering at the molecular level are required to regulate the optoelectric properties and charge transporting process at the perovskite/hole transport [...] Read more.
To promote the performance of perovskite solar cells (PSCs), its theoretical power conversion efficiency (PCE) and high stability, elaborative defect passivation, and interfacial engineering at the molecular level are required to regulate the optoelectric properties and charge transporting process at the perovskite/hole transport layer (HTL) interfaces. Herein, we introduce for the first time a multifunctional dipole polymer poly(2-ethyl-2-oxazoline) (PEOz) between the perovskite and Spiro-OMeTAD HTL in planar n-i-p PSCs, which advances the PSCs toward both high efficiency and excellent stability by stimulating three beneficial effects. First, the ether–oxygen unshared electron pairs in PEOz chemically react with unsaturated Pb2+ on the perovskite surfaces by forming a strong Pb–O bond, which effectively reduces the uncoordinated defects on the perovskite surfaces and enhances the absorption ability of the resulting PSCs. Second, the dipole induced by PEOz at the perovskite/HTL interface can decrease the HOMO and LUMO level of Spiro-OMeTAD and optimize the band alignment between these layers, thereby suppressing the interfacial recombination and accelerating the hole transport/extraction ability in the cell. Third, the hygroscopic PEOz thin film can protect perovskite film from water erosion by absorbing the water molecules before perovskite does. Finally, the PEOz-modified PSC exhibits an optimized PCE of 21.86%, with a high short-circuit current density (Jsc) of 24.88 mA/cm2, a fill factor (FF) of 0.79, and an open-circuit voltage (Voc) of 1.11 V. The unencapsulated devices also deliver excellent operation stability over 300 h in an ambient atmosphere with a humidity of 30~40% and more than 10 h under thermal stress. Full article
(This article belongs to the Special Issue Applications of Polymers for Metal Halide Perovskite Optoelectronic Devices)
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11 pages, 4431 KiB  
Article
Wavelength-Tunable and Water-Stable Cesium–Lead-Based All-Bromide Nanocrystal–Polymer Composite Films Using Ultraviolet-Curable Prepolymer as an Anti-Solvent
by Wook Hyun Kim, Jungyoun Bae, Kang-Pil Kim and Sungho Woo
Polymers 2022, 14(3), 381; https://doi.org/10.3390/polym14030381 - 19 Jan 2022
Cited by 3 | Viewed by 2062
Abstract
All-inorganic metal halide perovskite nanocrystals (IPeNCs) have become one of the most promising luminescent materials for next-generation display and lighting technology owing to their excellent color expression ability. However, research on IPeNCs with stable blue emission is limited. In this paper, we report [...] Read more.
All-inorganic metal halide perovskite nanocrystals (IPeNCs) have become one of the most promising luminescent materials for next-generation display and lighting technology owing to their excellent color expression ability. However, research on IPeNCs with stable blue emission is limited. In this paper, we report stable blue emissive all-bromide IPeNCs obtained through a modified ligand-assisted reprecipitation method using an ultraviolet (UV)-curable prepolymer as the anti-solvent at a low temperature. We found that the blue emission originates from quantum-confined CsPbBr3 nanoparticles formed together with the colorless wide-bandgap Cs4PbBr6 nanocrystals. When the temperature of the prepolymer was increased from 0 to 50 °C, CsPbBr3 nanoparticles became larger and more crystalline, thereby altering their emission color from blue to green. The synthesized all-bromide blue-emitting IPeNC solution remained stable for over 1 h. It also remained stable when it was mixed with the green-emitting IPeNC solution. By simply exposing the as-synthesized IPeNC–prepolymer solutions to UV light, we formed water-stable composite films that emitted red, green, blue, and white colors. We believe that this synthetic method can be used to develop color-emitting composite materials that are highly suitable for application as the color conversion films of full-color liquid crystal display backlight systems and lighting applications. Full article
(This article belongs to the Special Issue Applications of Polymers for Metal Halide Perovskite Optoelectronic Devices)
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11 pages, 2074 KiB  
Article
Stability Improvement of Perovskite Solar Cells by the Moisture-Resistant PMMA:Spiro-OMeTAD Hole Transport Layer
by Shaohua Ma, Shangzheng Pang, Hang Dong, Xiaoping Xie, Gang Liu, Peng Dong, Dawei Liu, Weidong Zhu, He Xi, Dazheng Chen, Chunfu Zhang and Yue Hao
Polymers 2022, 14(2), 343; https://doi.org/10.3390/polym14020343 - 17 Jan 2022
Cited by 17 | Viewed by 3445
Abstract
Perovskite solar cells (PSCs) based on the 2,2′,7,7′-tetrakis(N,N-di-p-methoxyphenylamine)-9,9′-spirobifluorene (spiro-OMeTAD) hole transport layer have exhibited leading device performance. However, the instability caused by this organic function layer is a very important limiting factor to the further development of PSCs. In this work, the spiro-OMeTAD [...] Read more.
Perovskite solar cells (PSCs) based on the 2,2′,7,7′-tetrakis(N,N-di-p-methoxyphenylamine)-9,9′-spirobifluorene (spiro-OMeTAD) hole transport layer have exhibited leading device performance. However, the instability caused by this organic function layer is a very important limiting factor to the further development of PSCs. In this work, the spiro-OMeTAD is doped with polymethyl methacrylate (PMMA), which is further used as the hole transport layer to improve the device stability. It is shown that the PMMA can effectively improve the moisture and oxygen resistance of spiro-OMeTAD, which leads to improved device stability by separating the perovskite layer from moisture and oxygen. The device efficiency can maintain 77% of the original value for PSCs with the PMMA-doped spiro-OMeTAD hole transport layer, under a natural air environment (RH = 40%) for more than 80 days. The results show that the moisture- and oxygen-resistant PMMA:spiro-OMeTAD hole transport layer is effective at improving the device performance. Full article
(This article belongs to the Special Issue Applications of Polymers for Metal Halide Perovskite Optoelectronic Devices)
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