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Incorporation of a Boron-Nitrogen Covalent Bond Improves the Charge-Transport and Charge-Transfer Characteristics of Organoboron Small-Molecule Acceptors for Organic Solar Cells. Molecules 2023; 28:molecules28020811. [PMID: 36677871 PMCID: PMC9861936 DOI: 10.3390/molecules28020811] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Revised: 01/09/2023] [Accepted: 01/11/2023] [Indexed: 01/15/2023] Open
Abstract
An organoboron small-molecular acceptor (OSMA) MB←N containing a boron-nitrogen coordination bond (B←N) exhibits good light absorption in organic solar cells (OSCs). In this work, based on MB←N, OSMA MB-N, with the incorporation of a boron-nitrogen covalent bond (B-N), was designed. We have systematically investigated the charge-transport properties and interfacial charge-transfer characteristics of MB-N, along with MB←N, using the density functional theory (DFT) and the time-dependent density functional theory (TD-DFT). Theoretical calculations show that MB-N can simultaneously boost the open-circuit voltage (from 0.78 V to 0.85 V) and the short-circuit current due to its high-lying lowest unoccupied molecular orbital and the reduced energy gap. Moreover, its large dipole shortens stacking and greatly enhances electron mobility by up to 5.91 × 10-3 cm2·V-1·s-1. Notably, the excellent interfacial properties of PTB7-Th/MB-N, owing to more charge transfer states generated through the direct excitation process and the intermolecular electric field mechanism, are expected to improve OSCs performance. Together with the excellent properties of MB-N, we demonstrate a new OSMA and develop a new organoboron building block with B-N units. The computations also shed light on the structure-property relationships and provide in-depth theoretical guidance for the application of organoboron photovoltaic materials.
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Gu J, Wang C, Xu X, Xiao L, Li J, Zhao J, Zou G. Efficient molecular ferroelectric photovoltaic device with high photocurrent via lewis acid-base adduct approach. NANOTECHNOLOGY 2022; 33:405402. [PMID: 35617939 DOI: 10.1088/1361-6528/ac73a7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Accepted: 05/26/2022] [Indexed: 06/15/2023]
Abstract
Traditional inorganic oxide ferroelectric materials usually have band gaps above 3 eV, leading to more than 80% of the solar spectrum unavailable, greatly limiting the current density of their devices just atμA cm-2level. Therefore, exploring ferroelectric materials with lower band gaps is considered as an effective method to improve the performance of ferroelectric photovoltaic devices. Inorganic ferroelectric materials are often doped with transition metal elements to reduce the band gap, which is a complex doping and high temperature fabrication process. Recently, molecular ferroelectric materials can change the symmetry and specific interactions of crystals at the molecular level by chemically modifying or tailoring cations with high symmetry, enabling rational design and banding of ferroelectricity in the framework of perovskite simultaneously. Therefore, the molecular ferroelectric materials have a great performance for both excellent ferroelectricity and narrow band gap without doping. Here, we report a ferroelectric photovoltaic device employing an organic-inorganic hybrid molecular ferroelectric material with a band gap of 2.3 eV to obtain high current density. While the poor film quality of molecular ferroelectrics still limits it. The Lewis acid-base adduct is found to greatly improve the film quality with lower defect density and higher carrier mobility. Under standard AM 1.5 G illumination, the photocurrents of ∼1.51 mA cm-2is achieved along with a device efficiency of 0.45%. This work demonstrates new possibilities for the application of molecular ferroelectric films with narrow band gaps in photovoltaic devices, and lays a foundation for Lewis acid-base chemistry to improve the quality of molecular ferroelectric thin films to obtain high current densities and device performance.
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Affiliation(s)
- Jiahao Gu
- College of Energy, Soochow Institute for Energy and Materials Innovations, and Key Laboratory of Advanced Carbon Material and Wearable Energy Technologies of Jiangsu Province, Soochow University, Suzhou, 215006, People's Republic of China
| | - Chen Wang
- College of Mechanical and Electronic Engineering, Shandong University of Science and Technology, Qingdao, 266590, People's Republic of China
| | - Xiaoli Xu
- College of Energy, Soochow Institute for Energy and Materials Innovations, and Key Laboratory of Advanced Carbon Material and Wearable Energy Technologies of Jiangsu Province, Soochow University, Suzhou, 215006, People's Republic of China
| | - Lingbo Xiao
- College of Energy, Soochow Institute for Energy and Materials Innovations, and Key Laboratory of Advanced Carbon Material and Wearable Energy Technologies of Jiangsu Province, Soochow University, Suzhou, 215006, People's Republic of China
| | - Jun Li
- College of Energy, Soochow Institute for Energy and Materials Innovations, and Key Laboratory of Advanced Carbon Material and Wearable Energy Technologies of Jiangsu Province, Soochow University, Suzhou, 215006, People's Republic of China
| | - Jie Zhao
- College of Energy, Soochow Institute for Energy and Materials Innovations, and Key Laboratory of Advanced Carbon Material and Wearable Energy Technologies of Jiangsu Province, Soochow University, Suzhou, 215006, People's Republic of China
| | - Guifu Zou
- College of Energy, Soochow Institute for Energy and Materials Innovations, and Key Laboratory of Advanced Carbon Material and Wearable Energy Technologies of Jiangsu Province, Soochow University, Suzhou, 215006, People's Republic of China
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Jankowska J, Sobolewski AL. Efficient Separation of Photogenerated Charges in a Ferroelectric Molecular Wire: Nonadiabatic Dynamics Study on 3,5‐Dicyano‐1,7‐dimethylopyrrolo[3,2‐f]indole Trimer. CHEMPHOTOCHEM 2019. [DOI: 10.1002/cptc.201800222] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Kar M, Rajbanshi B, Sarkar R, Pal S, Sarkar P. Periodically-ordered one and two dimensional CdTe QD superstructures: a path forward in photovoltaics. Phys Chem Chem Phys 2019; 21:19391-19402. [DOI: 10.1039/c9cp03529j] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
By using the state-of-the-art theoretical method, we herein explore the potentiality of covalently linked periodically-ordered 1D chain, 2D hexagonal and square ordered superstructures of CdTe QDs in photovoltaics.
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Affiliation(s)
- Moumita Kar
- Department of Chemistry
- Visva-Bharati University
- Santiniketan-731235
- India
| | - Biplab Rajbanshi
- Department of Chemistry
- Visva-Bharati University
- Santiniketan-731235
- India
| | - Ritabrata Sarkar
- Department of Chemistry
- University of Gour Banga
- Malda-732103
- India
| | - Sougata Pal
- Department of Chemistry
- University of Gour Banga
- Malda-732103
- India
| | - Pranab Sarkar
- Department of Chemistry
- Visva-Bharati University
- Santiniketan-731235
- India
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Gorbunov AV, Putzeys T, Urbanavičiūtė I, Janssen RAJ, Wübbenhorst M, Sijbesma RP, Kemerink M. True ferroelectric switching in thin films of trialkylbenzene-1,3,5-tricarboxamide (BTA). Phys Chem Chem Phys 2018; 18:23663-72. [PMID: 27510767 DOI: 10.1039/c6cp03835b] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We have investigated the ferroelectric polarization switching properties of trialkylbenzene-1,3,5-tricarboxamide (BTA), which is a model system for a large class of novel organic ferroelectric materials. In the solid state BTAs form a liquid crystalline columnar hexagonal phase that provides long range order that was previously shown to give rise to hysteretic dipolar switching. In this work the nature of the polar switching process is investigated by a combination of dielectric relaxation spectroscopy, depth-resolved pyroelectric response measurements, and classical frequency- and time-dependent electrical switching. We show that BTAs, when brought in a homeotropically aligned hexagonal liquid crystalline phase, are truly ferroelectric. Analysis of the transient switching behavior suggests that the ferroelectric switching is limited by a highly dispersive nucleation process, giving rise to a wide distribution of switching times.
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Affiliation(s)
- A V Gorbunov
- Department of Applied Physics, Eindhoven University of Technology, PO Box 513, 5600 MB Eindhoven, The Netherlands
| | - T Putzeys
- Department of Physics and Astronomy, Laboratory for Soft Matter and Biophysics, KU Leuven, Celestijnenlaan 200D, B-3001 Heverlee, Belgium
| | - I Urbanavičiūtė
- Complex Materials and Devices, Department of Physics, Chemistry and Biology (IFM), Linköping University, 58183 Linköping, Sweden.
| | - R A J Janssen
- Department of Applied Physics, Eindhoven University of Technology, PO Box 513, 5600 MB Eindhoven, The Netherlands
| | - M Wübbenhorst
- Department of Physics and Astronomy, Laboratory for Soft Matter and Biophysics, KU Leuven, Celestijnenlaan 200D, B-3001 Heverlee, Belgium
| | - R P Sijbesma
- Laboratory of Macromolecular and Organic Chemistry, Eindhoven University of Technology, P. O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - M Kemerink
- Department of Applied Physics, Eindhoven University of Technology, PO Box 513, 5600 MB Eindhoven, The Netherlands and Complex Materials and Devices, Department of Physics, Chemistry and Biology (IFM), Linköping University, 58183 Linköping, Sweden.
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Kielesiński Ł, Morawski O, Dobrzycki Ł, Sobolewski AL, Gryko DT. The Coumarin-Dimer Spring-The Struggle between Charge Transfer and Steric Interactions. Chemistry 2017; 23:9174-9184. [PMID: 28500858 DOI: 10.1002/chem.201701387] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2017] [Indexed: 01/01/2023]
Affiliation(s)
- Łukasz Kielesiński
- Institute of Organic Chemistry; Polish Academy of Sciences; Kasprzaka 44/52 01-224 Warsaw Poland
- Institute of Physics; Polish Academy of Sciences; Al. Lotników 32/46 02-668 Warsaw Poland
| | - Olaf Morawski
- Institute of Physics; Polish Academy of Sciences; Al. Lotników 32/46 02-668 Warsaw Poland
| | - Łukasz Dobrzycki
- Faculty of Chemistry; Warsaw University; Pasteura 1 00-273 Warsaw Poland
| | - Andrzej L. Sobolewski
- Institute of Physics; Polish Academy of Sciences; Al. Lotników 32/46 02-668 Warsaw Poland
| | - Daniel T. Gryko
- Institute of Organic Chemistry; Polish Academy of Sciences; Kasprzaka 44/52 01-224 Warsaw Poland
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Wierzbowska M, Wawrzyniak-Adamczewska M. Cascade donor–acceptor organic ferroelectric layers, between graphene sheets, for solar cell applications. RSC Adv 2016. [DOI: 10.1039/c6ra07221f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Organic ferroelectric layers sandwiched between the graphene sheets are presented as a model of the solar cell.
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