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Molecules
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Molecular Semiconductors for Organic and Perovskite Solar Cells
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Molecular Semiconductors for Organic and Perovskite Solar Cells

A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Materials Chemistry".

Deadline for manuscript submissions: closed (30 April 2024) | Viewed by 26239

Special Issue Editors

Dr. Guangye Zhang

E-Mail Website
Guest Editor
College of New Materials and New Energies, Shenzhen Technology University, Shenzhen, China
Interests: organic semiconductors; organic electronics; organic photovoltaic devices; polymer solar cells; device physics
Prof. Dr. Tao Liu

E-Mail Website
Guest Editor
School of Resources, Environment and Materials, Guangxi University, Nanning, China
Interests: organic photovoltaic materials; organic solar cells; non-fullerene acceptors; device engineering; morphology

Special Issue Information

Dear Colleagues,

Compared with inorganic semiconductor materials, molecular semiconductor materials are usually cost-effective, flexible, and light-weight. In the past three decades, molecular semiconductor materials and thin-film devices based on them have developed rapidly. They have gradually shifted from pure scientific research to practical application, and are moving towards industrialization. Taking the field of thin-film solar cells as an example, molecular semiconductor materials have played a central role in device structures including active layers, electron transport layers, and hole transport layers. The most typical representatives are organic solar cells and perovskite solar cells. Through molecular design, structural units with various functions can be synthesized into materials with different properties, and molecular structures with favorable properties can be rationally designed for application scenarios. The scope of this Special Issue is to present the recent progress and fundamental aspects of molecular semiconductors, their molecular design, structure–property relationships, and applications in the field of organic and perovskite solar cells. We seek papers demonstrating the state-of-the-art and discussing the future developments of this field. The topics of interest for this Special Issue include but are not limited to the keywords listed below. Manuscripts relevant to the scheme are all welcome.

Dr. Guangye Zhang
Prof. Dr. Tao Liu
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. Molecules 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

  • organic solar cells
  • perovskite solar cells
  • nonfullerene acceptors
  • polymer donors
  • molecular charge transport layers
  • molecular design
  • device performance
  • morphology

Published Papers (4 papers)

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Research

11 pages, 1738 KiB  
Article
A Functional Biological Molecule Restores the PbI2 Residue-Induced Defects in Two-Step Fabricated Perovskites
by Yuanmei Huang, Guoping Yu, Danish Khan, Shuanglin Wang, Yujie Sui, Xin Yang, Yu Zhuang, Jun Tang, Huaxi Gao, Ming Xin, Abuduwayiti Aierken and Zeguo Tang
Molecules 2023, 28(20), 7120; https://doi.org/10.3390/molecules28207120 - 17 Oct 2023
Viewed by 809
Abstract
Coating the perovskite layer via a two-step method is an adaptable solution for industries compared to the anti-solvent process. But what about the impact of unreacted PbI2? Usually, it is generated during perovskite conversion in a two-step method and considered beneficial [...] Read more.
Coating the perovskite layer via a two-step method is an adaptable solution for industries compared to the anti-solvent process. But what about the impact of unreacted PbI2? Usually, it is generated during perovskite conversion in a two-step method and considered beneficial within the grain boundaries, while also being accused of enhancing the interface defects and nonradiative recombination. Several additives are mixed in PbI2 precursors for the purpose of improving the perovskite crystallinity and hindering the Pb2+ defects. Herein, in lieu of adding additives to the PbI2, the effects of the PbI2 residue via the electron transport layer/perovskite interface modification are explored. Consequently, by introducing artemisinin decorated with hydrophobic alkyl units and a ketone group, it reduces the residual PbI2 and improves the perovskites’ crystallinity by coordinating with Pb2+. In addition, artemisinin-deposited perovskite enhances both the stability and efficiency of perovskite solar cells by suppressing nonradiative recombination Full article
(This article belongs to the Special Issue Molecular Semiconductors for Organic and Perovskite Solar Cells)
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11 pages, 2862 KiB  
Article
Dimethylammonium Cation-Induced 1D/3D Heterostructure for Efficient and Stable Perovskite Solar Cells
by Xianfang Zhou, Chuangye Ge, Xiao Liang, Fei Wang, Dawei Duan, Haoran Lin, Quanyao Zhu and Hanlin Hu
Molecules 2022, 27(21), 7566; https://doi.org/10.3390/molecules27217566 - 04 Nov 2022
Cited by 1 | Viewed by 2155
Abstract
Mixed-dimensional perovskite engineering has been demonstrated as a simple and useful approach to achieving highly efficient and more-durable perovskite solar cells (PSCs), which have attracted increasing research interests worldwide. In this work, 1D/3D mixed-dimensional perovskite has been successfully obtained by introducing DMAI via [...] Read more.
Mixed-dimensional perovskite engineering has been demonstrated as a simple and useful approach to achieving highly efficient and more-durable perovskite solar cells (PSCs), which have attracted increasing research interests worldwide. In this work, 1D/3D mixed-dimensional perovskite has been successfully obtained by introducing DMAI via a two-step deposition method. The additive DMA+ can facilitate the crystalline growth and form 1D DMAPbI3 at grain boundaries of 3D perovskite, leading to improved morphology, longer charge carrier lifetime, and remarkably reduced bulk trap density for perovskite films. Meanwhile, the presence of low-dimension perovskite is able to prevent the intrusion of moisture, resulting in enhanced long-term stability. As a result, the PSCs incorporated with 1D DMAPbI3 exhibited a first-class power conversion efficiency (PCE) of 21.43% and maintained 85% of their initial efficiency after storage under ambient conditions with ~45% RH for 1000 h. Full article
(This article belongs to the Special Issue Molecular Semiconductors for Organic and Perovskite Solar Cells)
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12 pages, 3259 KiB  
Article
Revealing the Hidden Mechanism of Enhanced Responsivity of Doped p-i-n Perovskite Photodiodes via Coupled Opto-Electronic Model
by Dan Wu, Hechun Zhang, Haochen Liu, Wenhui Li, Xiangtian Xiao, Kanming Shi, Taikang Ye, Jiayun Sun, Zhaowen Lin, Jing Liu, Mingxia Qiu, Aung Ko Ko Kyaw and Kai Wang
Molecules 2022, 27(19), 6223; https://doi.org/10.3390/molecules27196223 - 22 Sep 2022
Cited by 1 | Viewed by 12272
Abstract
Organic-inorganic halide perovskites have demonstrated preeminent optoelectronic performance in recent years due to their unique material properties, and have shown great potential in the field of photodetectors. In this study, a coupled opto-electronic model is constructed to reveal the hidden mechanism of enhancing [...] Read more.
Organic-inorganic halide perovskites have demonstrated preeminent optoelectronic performance in recent years due to their unique material properties, and have shown great potential in the field of photodetectors. In this study, a coupled opto-electronic model is constructed to reveal the hidden mechanism of enhancing the performance of perovskite photodetectors that are suitable for both inverted and regular structure doped p-i-n perovskite photodiodes. Upon illumination, the generation rate of photogenerated carriers is calculated followed by carrier density distribution, which serves as a coupled joint to further analyze the recombination rate, electric field strength, and current density of carriers under different doping types and densities. Moreover, experiments were carried out in which the doping types and densities of the active layer were regulated by changing the precursor ratios. With optimal doping conditions, the inverted and regular perovskite photodiodes achieved an external quantum efficiency of 74.83% and 73.36%, and a responsivity of 0.417 and 0.404 A/W, respectively. The constructed coupled opto-electronic model reveals the hidden mechanism and along with the doping strategy, this study provides important guidance for further analysis and improvement of perovskite-based photodiodes. Full article
(This article belongs to the Special Issue Molecular Semiconductors for Organic and Perovskite Solar Cells)
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10 pages, 3368 KiB  
Article
Sequential Processing Enables 17% All-Polymer Solar Cells via Non-Halogen Organic Solvent
by Chaoyue Zhao, Lihong Wang, Guoping Zhang, Yajie Wang, Ruiyu Hu, Hui Huang, Mingxia Qiu, Shunpu Li and Guangye Zhang
Molecules 2022, 27(17), 5739; https://doi.org/10.3390/molecules27175739 - 05 Sep 2022
Cited by 4 | Viewed by 10276
Abstract
All-polymer solar cells (All-PSCs), whose electron donor and acceptors are both polymeric materials, have attracted great research attention in the past few years. However, most all-PSC devices with top-of-the-line efficiencies are processed from chloroform. In this work, we apply the sequential processing (SqP) [...] Read more.
All-polymer solar cells (All-PSCs), whose electron donor and acceptors are both polymeric materials, have attracted great research attention in the past few years. However, most all-PSC devices with top-of-the-line efficiencies are processed from chloroform. In this work, we apply the sequential processing (SqP) method to fabricate All-PSCs from an aromatic hydrocarbon solvent, toluene, and obtain efficiencies up to 17.0%. By conducting a series of characterizations on our films and devices, we demonstrate that the preparation of SqP devices using toluene can effectively reduce carrier recombination, enhance carrier mobility and promote the fill factor of the device. Full article
(This article belongs to the Special Issue Molecular Semiconductors for Organic and Perovskite Solar Cells)
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