Photophysical Properties of Two New Donor-Acceptor Conjugated Copolymers and Their Model Compounds: Applications in Polymer Light Emitting Diodes (PLEDs) and Polymer Photovoltaic Cells (PPCs)

Ayachi, Sahbi; Mabrouk, A.; Bouachrine, Mohammed; Alimi, K.

doi:10.5772/54254

Cited by 4 publications

(3 citation statements)

References 105 publications

(112 reference statements)

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“…From Table 4, it can be analyzed that the V OC of the PSC has a direct relation with the LUMO energy level of PCBM; a higher LUMO level results in large V OC . A PC 61 BM 62 with LUMO energy level of −3.63 eV, produces V OC of 1.02 eV with our designed D-A-D; however, this voltage drops down to 0.65 eV when PC 71 BM 64 is used (LUMO, −4.0 eV). Comparative analysis of the data of Table 4 led us to predict that an average open circuit voltage of roundabout 0.90 eV can be achieved, using D-A-D as donor material in the BHJ solar cell devices.…”

Section: Resultsmentioning

confidence: 85%

Density Functional Theory Study of Selenium-Substituted Low-Bandgap Donor–Acceptor–Donor Polymer

et al. 2016

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Section: Resultsmentioning

confidence: 85%

Density Functional Theory Study of Selenium-Substituted Low-Bandgap Donor–Acceptor–Donor Polymer

et al. 2016

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“…Its inherent high fluorescence yield has proven beneficial for emitting applications such as organic light emitting diodes [18][19][20]. The intense fluorescence of BZT derivatives has also found uses in bioimaging [21] and for nucleic base molecular recognition in DNA sensing [22].…”

Section: Introductionmentioning

confidence: 99%

Photophysical, electrochemical, and spectroelectrochemical investigation of electronicpush–pullbenzothiadiazole fluorophores

Wałęsa‐Chorab

Tremblay

Ettaoussi

et al. 2015

Pure and Applied Chemistry

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Two electronic push-pull fluorophores consisting of a benzothiadiazole core and a terminal N,N-dimethylamino electron donating group were prepared. The effect of the terminal electron withdrawing group (-NO 2 and -CN) on the spectroscopic, electrochemical, and spectroelectrochemical properties were examined. The fluorophores were solvatochromic with Stokes shifts upward of 9000 cm −1 being observed in aprotic solvents of varying polarity. It was found that the fluorophores fluoresced appreciably (86 % > Φ fl > 18 %) in hexane, toluene, diethyl ether, dichloromethane, ethyl acetate, and THF. The fluorescence was quenched in acetonitrile, acetone, and DMSO. The fluorophores also fluoresced appreciably in thin films when embedded in poly(methyl methacrylate) and poly(dimethylsiloxane) matrices. Protonating the terminal amine with trifluoroacetic acid quenched the intramolecular charge transfer band, although the fluorophores remained fluorescent. The fluorophores could also be reversibly oxidized electrochemically. The resulting oxidized state was visually different than the neutral form. Electrochemical oxidation also led to reversible changes in both the fluorescence wavelength and intensity.

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“…Polymers and small molecules based on cyclopentadithiophene (CPDT) were widely used in organic electronic applications thanks tothe high rigidity, planarity and charge transfer ability delivered by CPDT group [17][18][19][20][21][22][23]. Further, Benzothiadiazole (BT) [24][25][26][27] and Diketopyrrolopyrrole (DPP) [28][29][30] have been extensively utilized as electron deficient acceptor patterns in conjugated systems. These acceptor groups offer the advantages of the high electron withdrawing ability, the excellent electro-optical properties and the important carrier mobility within conjugated materials.…”

Section: Introductionmentioning

confidence: 99%

Designing Well-Organized Donor-Bridge-Acceptor Conjugated Systems Based on Cyclopentadithiophene as Donors in Bulk Heterojunction Organic Solar Cells: DFT-Based Modeling and Calculations

Zaier¹,

Ayachi²

2021

Solar Cells - Theory, Materials and Recent Advances

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Two host materials based on CPDT as donors in bulk heterojunction organic solar cells were designed and investigated by means of DFT calculations. The first one (P-CPDTBT3) is a copolymer with D-A configuration and the second one (SM-CPDTDPP) is a D-π-A-π-D type small molecule. The investigated materials exhibited interesting structural properties with high planarity and rigidity originated from intra-molecular non-covalent interactions between the different building blocks. Thanks to their narrow band gaps, the optical absorption spectra have covered the main part of solar spectrum of interest. In addition, some general transport properties have been established. The transition density matrix (TDM) was used to get insight into the interaction of hole–electron localization and the electronic excitation processes. The photovoltaic parameters (FF, Voc) were calculated. The obtained results have been attempted to provide novel structure–property relationships for the rational design strategies of high-performance photovoltaic materials with power conversion efficiency of nearly 10%.

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Photophysical Properties of Two New Donor-Acceptor Conjugated Copolymers and Their Model Compounds: Applications in Polymer Light Emitting Diodes (PLEDs) and Polymer Photovoltaic Cells (PPCs)

Cited by 4 publications

References 105 publications

Density Functional Theory Study of Selenium-Substituted Low-Bandgap Donor–Acceptor–Donor Polymer

Density Functional Theory Study of Selenium-Substituted Low-Bandgap Donor–Acceptor–Donor Polymer

Photophysical, electrochemical, and spectroelectrochemical investigation of electronicpush–pullbenzothiadiazole fluorophores

Designing Well-Organized Donor-Bridge-Acceptor Conjugated Systems Based on Cyclopentadithiophene as Donors in Bulk Heterojunction Organic Solar Cells: DFT-Based Modeling and Calculations

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