New Trends in Organic Solar Cells

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Energy Science and Technology".

Deadline for manuscript submissions: closed (10 January 2022) | Viewed by 4823

Special Issue Editors


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Guest Editor
Advanced Materials and Devices Laboratory, Department of Bio-Convergence Science, Advance Science Campus, Jeonbuk National University, Jeongeup 56212, Republic of Korea
Interests: nanomaterials; electronic materials; opto-electronic devices; heterostructure devices; field emission transistors (FETs); solid state solar cells; organic solar cells (OSCs); perovskite solar cells (PSCs); heterojuction in catalysts
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Guest Editor
1. Energy Materials & Surface Science Laboratory, Solar Energy Research Center, School of Chemical Engineering, Jeonbuk National University, Jeonju 54896, Korea
2. Korea Basic Science Institute (KBSI), 169-148 Gwahak-ro, Yuseong-gu, Daejon 34133, Korea
Interests: perovskite solar cells (PSCs); organic solar cells (OSCs); dye-sensitized solar cells (DSSCs); supercapacitors; photocatalysts; sensors
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

We would like to draw your attention to our upcoming Special Issue on “New Trends in Organic Solar Cells”, which will be published in Applied Sciences, (ISSN 2076-3417; CODEN: ASPCC7, IF-2.474, https://0-www-mdpi-com.brum.beds.ac.uk/journal/applsci), an international peer-reviewed open-access journal by MDPI. Professor Sadia Ameen and Professor Hyung-Shik Shin are serving as Guest Editors for this issue. The purpose of this Special Issue is to solicit original contributions and publish recent advances in organic solar cells. Based on your professional knowledge, we believe that you could make an excellent contribution to this Special Issue. Since you are an expert in the field, we sincerely invite you to submit related papers to us.

For further reading, please follow the link to the Special Issue Website at: https://0-www-mdpi-com.brum.beds.ac.uk/journal/applsci/special_issues/organic_solar_cells_trends. The deadline for this submission is 20 June 2021. However, we encourage you to submit your work as soon as it is ready. Please note that all submitted articles will undergo peer review.

In case of any inquiries or if you need any additional information, please do not hesitate to contact us at [email protected] and [email protected]. We look forward to your contribution.

Prof. Dr. Sadia Ameen
Prof. Dr. Hyung-Shik Shin
Guest Editors

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Keywords

  • Organic solar cells
  • Small organic molecules
  • Conducting polymers
  • Semiconductors
  • Photovoltaic performances
  • Light harvesting

Published Papers (2 papers)

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Research

9 pages, 15260 KiB  
Article
The Effects of Molecular Packing Behavior of Small-Molecule Acceptors in Ternary Organic Solar Cells
by Eunhee Lim
Appl. Sci. 2021, 11(2), 755; https://0-doi-org.brum.beds.ac.uk/10.3390/app11020755 - 14 Jan 2021
Cited by 5 | Viewed by 1992
Abstract
Herein, two diketopyrrolopyrrole (DPP)-based, small-molecule isomers, o- and p-DPP-PhCN, were introduced as acceptors in ternary organic solar cells (OSCs). The isomers have the same molecular backbone but differ in the positions of the cyanide (CN) substituents (ortho and para), which greatly [...] Read more.
Herein, two diketopyrrolopyrrole (DPP)-based, small-molecule isomers, o- and p-DPP-PhCN, were introduced as acceptors in ternary organic solar cells (OSCs). The isomers have the same molecular backbone but differ in the positions of the cyanide (CN) substituents (ortho and para), which greatly affects their packing behavior. Ternary solar cells composed of poly(3-hexylthiophene) (P3HT):DPP-PhCN:phenyl-C61-butyric acid methyl ester (PCBM) were fabricated, and the effects of the different packing behaviors of the third component on the device performance and the working mechanism of the ternary cells were investigated. The addition of o-DPP-PhCN with a relatively high-lying lowest unoccupied molecular orbital energy level resulted in an increase in the open-circuit voltage (VOC) in the ternary devices, demonstrating the alloy-like structure of the two acceptors (o-DPP-PhCN and PCBM) in the ternary system. However, the p-DPP-PhCN-based ternary cells exhibited VOC values similar to that of a P3HT:PCBM binary cell, irrespective of the addition of p-DPP-PhCN, indicating a cascade energy-level structure in the ternary system and an effective charge transfer from the P3HT to the PCBM. Importantly, by increasing the addition of p-DPP-PhCN, the short-circuit current density increased substantially, resulting in pronounced shoulder peaks in the external quantum efficiency responses in the long-wavelength region, corresponding to the contribution of the photocurrent generated by the light absorption of p-DPP-PhCN. Despite sharing the same molecular backbone, the two DPP-PhCNs exhibited substantially different packing behaviors according to the position of their CN substituents, which also greatly affected the working mechanism of the ternary devices fabricated using the DPP-PhCNs as the third component. Full article
(This article belongs to the Special Issue New Trends in Organic Solar Cells)
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13 pages, 3632 KiB  
Article
An Effective D-π-A Type Donor Material Based on 4-Fluorobenzoylacetonitrile Core Unit for Bulk Heterojunction Organic Solar Cells
by Shabaz Alam, M. Shaheer Akhtar, Abdullah, Eun-Bi Kim, Hyung-Shik Shin and Sadia Ameen
Appl. Sci. 2021, 11(2), 646; https://0-doi-org.brum.beds.ac.uk/10.3390/app11020646 - 11 Jan 2021
Cited by 2 | Viewed by 1996
Abstract
In order to develop new and effective donor materials, a planar donor-π-acceptor (D-π-A) type small organic molecule (SOM), 2-(4-fluorobenzoyl)-3-(5″-hexyl-[2,2′:5′,2″-terthiophen]-5-yl) acrylonitrile, named as H3T-4-FOP, was synthesized by the reaction of 4-fluorobenzoylacetonitrile (as acceptor unit) and hexyl terthiophene (as donor unit) derivatives. Promising optical, solubility, [...] Read more.
In order to develop new and effective donor materials, a planar donor-π-acceptor (D-π-A) type small organic molecule (SOM), 2-(4-fluorobenzoyl)-3-(5″-hexyl-[2,2′:5′,2″-terthiophen]-5-yl) acrylonitrile, named as H3T-4-FOP, was synthesized by the reaction of 4-fluorobenzoylacetonitrile (as acceptor unit) and hexyl terthiophene (as donor unit) derivatives. Promising optical, solubility, electronic and photovoltaic properties were observed for the H3T-4-FOP SOM. Significantly, the presence of 4-fluorobenzoylacetonitrile as an acceptor unit in H3T-4-FOP SOM tuned the optical band gap to ~2.01 eV and procured the reasonable energy levels as highest occupied molecular orbital (HOMO) of −5.27 eV and lowest unoccupied molecular orbital (LUMO) −3.26 eV. The synthesized H3T-4-FOP SOM was applied as a donor material to fabricate solution-processed bulk heterojunction organic solar cells (BHJ-OSCs) with an active layer of H3T-4-FOP: PC61BM (1:2, w/w) and was validated as having a good power conversion efficiency (PCE) of ~4.38%. Our studies clearly inspire for future designing of multifunctional groups containing the 4-fluorobenzoylacetonitrile based SOM for high performance BHJ-OSCs. Full article
(This article belongs to the Special Issue New Trends in Organic Solar Cells)
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