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Bhattacharya L, Brown A, Sharma S, Sahu S. Computational Design of Crescent Shaped Promising Nonfullerene Acceptors with 1,4-Dihydro-2,3-quinoxalinedione Core and Different Electron-withdrawing Terminal Units for Photovoltaic Applications. J Phys Chem A 2022; 126:7110-7126. [PMID: 36178932 DOI: 10.1021/acs.jpca.2c03906] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
This study aims to design a series of nonfullerene acceptors (NFAs) for photovoltaic applications having 1,4-dihydro-2,3-quinoxalinedione fused thiophene derivative as the core unit and 1,1-dicyanomethylene-3-indanone (IC) derivatives and different π-conjugated molecules other than IC as terminal acceptor units. All the investigated NFAs are found air-stable as the computed highest occupied molecular orbitals (HOMOs) are below the air oxidation threshold (ca. -5.27 eV vs saturated calomel electrode). The studied NFAs can act as potential nonfullerene acceptor candidates as they are found to have sufficient open-circuit voltage (Voc) and fill factor (FF) ranging from 0.62 to 1.41 V and 83%-91%, respectively. From the anisotropic mobility analysis, it is noticed that the studied NFAs except dicyano-rhodanine terminal unit containing NFA, exhibit better electron mobility than the hole mobility, and therefore, they can be more promising electron transporting acceptor materials in the active layer of an organic photovoltaic cell. From the optical absorption analysis, it is noted that all the designed NFAs have the maximum absorption spectra ranging from 597 nm-730 nm, which lies in the visible region and near-infrared (IR) region of the solar spectrum. The computed light-harvesting efficiencies for the PM6 (thiophene derivative donor selected in our study):NFA blends are found to lie in the range of 0.96-0.99, which indicates efficient light-harvesting by the PM6:NFA blends during photovoltaic device operation.
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Affiliation(s)
- Labanya Bhattacharya
- Computational Materials Research Lab, Department of Physics, Indian Institute of Technology (Indian School of Mines), Dhanbad, Jharkhand, 826004, India
| | - Alex Brown
- Department of Chemistry, University of Alberta, Edmonton, AlbertaT6G 2G2, Canada
| | - Sagar Sharma
- Department of Chemistry, S. B. Deorah College, Bora Service, Ulubari, Guwahati, 781007, AssamIndia
| | - Sridhar Sahu
- Computational Materials Research Lab, Department of Physics, Indian Institute of Technology (Indian School of Mines), Dhanbad, Jharkhand, 826004, India
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Martynov IV, Inasaridze LN, Troshin PA. Resist or Oxidize: Identifying Molecular Structure-Photostability Relationships for Conjugated Polymers Used in Organic Solar Cells. CHEMSUSCHEM 2022; 15:e202101336. [PMID: 34519424 DOI: 10.1002/cssc.202101336] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 08/14/2021] [Indexed: 06/13/2023]
Abstract
Although organic solar cells have started to demonstrate competitive power conversion efficiencies of >18 %, their operational lifetimes remain insufficient for wide practical use and the factors influencing the photostability of absorber materials and completed devices are still not completely understood. A systematic study of two series of structurally similar [XTBT]n and [XTTBTBTT]n polymers (16 structures in total) reveals the building blocks that enable the highest material stability towards photooxidation: fluorene, silafluorene, carbazole, diketopyrrolopyrrole, and isoindigo. Furthermore, a direct correlation is evident between the electronic properties of the conjugated polymers and their reactivity towards oxygen. The structures with the lowest highest occupied molecular orbital (HOMO) energies show the highest electrochemical oxidation potentials and appear to be the most resistant towards chemical oxidation. These relationships set important guidelines for the further rational design of new absorber materials for efficient and stable organic photovoltaics.
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Affiliation(s)
- Ilya V Martynov
- Institute of Problems of Chemical Physics, Russian Academy of Sciences, Academician Semenov avenue 1, Chernogolovka, Moscow Region, 142432, Russian Federation
| | - Liana N Inasaridze
- Institute of Problems of Chemical Physics, Russian Academy of Sciences, Academician Semenov avenue 1, Chernogolovka, Moscow Region, 142432, Russian Federation
| | - Pavel A Troshin
- Institute of Problems of Chemical Physics, Russian Academy of Sciences, Academician Semenov avenue 1, Chernogolovka, Moscow Region, 142432, Russian Federation
- Silesian University of Technology, Akademicka 2A, 44-100, Gliwice, Poland
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Bora SR, Kalita DJ. Hopping transport in perylene diimide based organic solar cells: a DFT approach. NEW J CHEM 2022. [DOI: 10.1039/d2nj03429h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this paper, a series of donor–π–acceptor (D–π–A) type oligomers were investigated for their structural and electronic properties through density functional theory (DFT) and time dependent-DFT (TD-DFT) calculations.
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Affiliation(s)
- Smiti Rani Bora
- Department of Chemistry, Gauhati University, Guwahati-781014, India
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Jadoun S, Rathore DS, Riaz U, Chauhan NPS. Tailoring of conducting polymers via copolymerization – A review. Eur Polym J 2021. [DOI: 10.1016/j.eurpolymj.2021.110561] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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Ahmed S, Kalita DJ. End-capped group manipulation of non-fullerene acceptors for efficient organic photovoltaic solar cells: a DFT study. Phys Chem Chem Phys 2020; 22:23586-23596. [PMID: 33057497 DOI: 10.1039/d0cp03814h] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
A series of acceptors, S1-S5, has been designed based on the acceptor-π-donor-π-acceptor (A-π-D-π-A) architecture by incorporating a phenothiazine unit as the central donor unit. Density functional theory (DFT) and time-dependent density functional theory (TD-DFT) methods have been employed to study the effect of various end-capped groups on the geometric, electronic, optical and charge transport properties of the designed acceptor molecules. The results reveal that on increasing the electron-withdrawing nature of the end-capped groups, the performance of the acceptor molecules increases. It is also observed that on increasing the flexibility of the end-capped groups, the planarity of the molecules gets destroyed and, as a result, the performance of the acceptor molecules decreases. The investigated molecules exhibit high electron affinity (EA) and low reorganization energy for electrons (λ-), indicating the electron acceptor nature of the designed molecules. The absorption properties of the molecules manifest that compounds S2-S4 possess high values of the maximum wavelength (λmax) of absorption. We have also studied the properties of a D/A active layer by considering PffBT4T-2OD as the electron donor and arranging PffBT4T-2OD/S1-S5 molecules in a face to face manner. Properties of the D/A blend indicate that molecules S2-S4 have capacity to promote charge carrier separation at the D/A active layer. Our results provide guidelines for further designing of acceptors to enhance the performance of organic solar cells (OSCs).
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Affiliation(s)
- Shahnaz Ahmed
- Department of Chemistry, Gauhati University, Guwahati-781014, India.
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Ahmed S, Mushahary BC, Kalita DJ. Rational Design of Bay-Annulated Indigo (BAI)-Based Oligomers for Bulk Heterojunction Organic Solar Cells: A Density Functional Theory (DFT) Study. ACS OMEGA 2020; 5:8321-8333. [PMID: 32309743 PMCID: PMC7161070 DOI: 10.1021/acsomega.0c00784] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2020] [Accepted: 03/25/2020] [Indexed: 05/03/2023]
Abstract
In this paper, we have designed a series of oligomers based on the donor-acceptor concept. Here, acceptor bay-annulated indigo (BAI) dye and donor N-methyl-4,5-diazacarbazole (DAC) are joined by a thiophene linkage. We have substituted the 5th and 5'th positions of the acceptor unit and the 2nd position of the donor unit with various electron-withdrawing and electron-donating groups to study various structural and electronic properties of the compounds. In this regard, we have calculated the dihedral angle, distortion energy, bond length alteration (BLA) parameters, bang gap (Δ H - L ) values, partial density of states (PDOS), electrostatic potential (ESP) surface analysis, reorganization energy, charge transfer rates, hopping mobility values, and absorption spectra of the compounds. The ESP plots of the compounds indicate significant charge separation in the studied compounds. Our study manifests that the designed compounds are prone to facile charge transport.
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Ahmed S, Dutta R, Kalita DJ. Strategical designing of diketopyrrolopyrrole-thiophene based donor-acceptor type organic oligomers and study their transport properties: A DFT/TD-DFT perspective. Chem Phys Lett 2019. [DOI: 10.1016/j.cplett.2019.05.027] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Mohanty ME, Madhu C, Reddy VL, Paramasivam M, Bangal PR, Rao VJ. Direct observation of the rise of delayed fluorescence in dithienylbenzothiadiazole and its role in the excited state dynamics of a donor-acceptor-donor molecule. Phys Chem Chem Phys 2018; 19:9118-9127. [PMID: 28317965 DOI: 10.1039/c7cp00261k] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Dithienylbenzothiadiazole (DTBT) is used as a building block in several molecules having application in organic light emitting devices (OLED) and organic photovoltaic (OPV) devices. Delayed fluorescence (DF) is the preferred design principle employed currently in OLED research. DTBT has excellent delayed fluorescence properties which makes this moiety a potentially viable OLED material. Here, the dynamics of intersystem crossing (ISC) and reverse intersystem crossing (RISC) have been explored using fluorescence, phosphorescence, fluorescence lifetime and transient absorption measurements. Experimentally it is demonstrated that singlet and triplet states of DTBT are close lying or degenerate and after a certain time the molecules can stay in the singlet or the triplet state forming an equilibrium between the two states which hinders the identification of these two states that could be characterized by routine steady state fluorescence and phosphorescence studies. Similarly in OPV material research, DTBT is coupled with strong donors to form push-pull molecules to produce a prolonged charge separated state. In this study DTBT appended with carbazole at both ends (CDTBT) was used to study the dynamics of DTBT within a donor-acceptor-donor system. The study reveals similar kinds of ISC and RISC in CDTBT along with a competitive deactivation pathway of the singlet state and it was concluded to be through the formation of a charge separated species in CDTBT.
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Affiliation(s)
- Maneesha Esther Mohanty
- Crop Protection Chemicals Division, CSIR-Indian Institute of Chemical Technology, Hyderabad 500 007, India.
| | - Chakali Madhu
- Crop Protection Chemicals Division, CSIR-Indian Institute of Chemical Technology, Hyderabad 500 007, India.
| | - Vanammoole Lakshmi Reddy
- Crop Protection Chemicals Division, CSIR-Indian Institute of Chemical Technology, Hyderabad 500 007, India.
| | - Mahalingavelar Paramasivam
- Crop Protection Chemicals Division, CSIR-Indian Institute of Chemical Technology, Hyderabad 500 007, India.
| | - Prakriti Ranjan Bangal
- Inorganic and Physical Chemistry Division, CSIR-Indian Institute of Chemical Technology, Hyderabad 500 007, India.
| | - Vaidya Jayathirtha Rao
- Crop Protection Chemicals Division, CSIR-Indian Institute of Chemical Technology, Hyderabad 500 007, India.
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Nosova GI, Ilgach DM, Berezin IA, Zhukova EV, Kopylova TN, Nikonova EN, Gadirov RM, Smyslov RY, Yakimansky AV. White electroluminescence from polyfluorenes copolymerized with carbazole derivatives of Nile Red and 1,8-naphthalimide. MENDELEEV COMMUNICATIONS 2017. [DOI: 10.1016/j.mencom.2017.05.016] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Klimovich IV, Prudnov FA, Inasaridze LN, Kuznetsov IE, Peregudov AS, Troshin PA. 5,6-Bis(octyloxy)-2,1,3-benzoxadiazole-based (X–DADAD) n polymers incorporating electron-donor building blocks used as photoactive materials in organic solar cells. MENDELEEV COMMUNICATIONS 2017. [DOI: 10.1016/j.mencom.2017.03.034] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Zhang MD, Huang CY, Song MX, Zhao DX, Cao H, Chen MD. D-D-π-A organic dye containing rhodanine-3-acetic acid moiety for dye-sensitized solar cells. MENDELEEV COMMUNICATIONS 2016. [DOI: 10.1016/j.mencom.2016.07.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Kutkan S, Goker S, Hacioglu SO, Toppare L. Syntheses, electrochemical and spectroelectrochemical characterization of benzothiadiazole and benzoselenadiazole based random copolymers. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2016. [DOI: 10.1080/10601325.2016.1189280] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Design of highly soluble PCDTBTBT-type conjugated polymers for organic solar cells. MENDELEEV COMMUNICATIONS 2016. [DOI: 10.1016/j.mencom.2016.05.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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