A low band gap donor–acceptor copolymer containing fluorene and benzothiadiazole units: synthesis and photovoltaic properties

Pei, Jinjin; Wen, Shizhu; Zhou, Yinhua; Dong, Qingfeng; Li, Zhaoyang; Zhang, Jibo; Tian, Wenjing

doi:10.1039/c0nj00378f

Cited by 39 publications

(20 citation statements)

References 47 publications

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“…However, TBT maxima absorption undergoes this shift. Redshift is associated with existence of interchain delocalization or polymer chain planarizing in F8TBT film …”

Section: Resultssupporting

confidence: 82%

“…Redshift is associated with existence of interchain delocalization or polymer chain planarizing in F8TBT film. 20,28 Narrow optical bandgap materials are usually desirable for photovoltaic devices presenting an absorption spectrum that matches the solar irradiance spectrum. As expected, the solid films presented redshifted spectra and smaller E opt g compared to those from solutions ( Table 1).…”

mentioning

confidence: 99%

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Effect of hexyl substituent groups on photophysical and electrochemical properties of the poly[(9,9‐Dioctyluorene)−2,7‐diyl‐alt‐(4,7‐bis (3‐Hexylthien‐5‐Yl)−2,1,3‐Benzothiadiazole)−2′,2″‐diyl]

Silva

Takimoto

Santos

et al. 2016

J Polym Sci B Polym Phys

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The effect of the presence of hexyl group in thiophene on the photophysical and electrochemical properties of poly[(9,9-dioctyluorene)22,7-diyl-alt-(4,7-bis(3-hexylthien-5-yl)22,1,3-benzothiadiazole)22The copolymers present electron donor-acceptor architecture and are synthesized by Suzuki coupling reaction. The UV/Vis spectra show absorption maximum in the wavelength range of blue and orange, which are associated with different segments of the polymer backbone. Addition of hexyl substituent groups has a positive effect on the molar absorptivity and increases the emission and absorption intensities due to fluorene and thiophene-benzothiadiazole-thiophene (TBT) units, although an increment in the bandgap is observed. Cyclic voltammetry study of the polymer films reveal irreversible reduction and oxidation processes of the TBT units in the polymer chain and the HOMO and LUMO energy levels suggest ambipolar character for the polymers, while the electrochemical bandgaps are consistent with the absorbance measurements.

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“…However, TBT maxima absorption undergoes this shift. Redshift is associated with existence of interchain delocalization or polymer chain planarizing in F8TBT film …”

Section: Resultssupporting

confidence: 82%

mentioning

confidence: 99%

Effect of hexyl substituent groups on photophysical and electrochemical properties of the poly[(9,9‐Dioctyluorene)−2,7‐diyl‐alt‐(4,7‐bis (3‐Hexylthien‐5‐Yl)−2,1,3‐Benzothiadiazole)−2′,2″‐diyl]

Silva

Takimoto

Santos

et al. 2016

J Polym Sci B Polym Phys

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“…A copolymer of dialkylfluorene with 4,7-dithienyl-2,1,3-benzothiadiazole (P155) showed good solubility and broad absorption range. But, PSC fabricated with PC 61 BM furnished a very poor PCE of 1.1% [142]. Another, D-A polymer of fluorene with 1,3-dithien-2-yl-thieno [3,4-c]pyrrole-4,6-dione (P156), was compared with polymers having different donor like carbazole (P157).…”

Section: Thiazole and Thiadiazole Based Polymersmentioning

confidence: 99%

Polymer design for solar cell – Current trend and future scenario

Hemavathi

Ahipa

Pai

2015

European Polymer Journal

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“…where e is the charge of an electron, E D H = −5.33 eV [9] is the energy of highest occupied molecular orbital (HOMO) of donor material, and E A L = −4.2 eV [12] is the energy of lowest unoccupied molecular orbital (LUMO) of acceptor material. The V oc thus obtained is = 0.83 V.…”

Section: Simulation Of V Ocmentioning

confidence: 99%

Highly Efficient and Stable Solar Cells with Hybrid of Nanostructures and Bulk Heterojunction Organic Semiconductors

Ram

Singh

2019

Advcd Theory and Sims

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The power conversion efficiency (PCE) of a hybrid bulk hetero-junction organic solar cell with an active layer of a blend of PBDT TS1 (donor) and PCBM (acceptor) incorporated with copper zinc tin sulfide (CZTS) quantum dots (QDs) and zinc oxide (ZnO) nanowires is simulated. It is found that the incorporation of CZTS-QDs of a single radius (1.5 nm) enhances the PCE from 9.1% to 12.34% and of 13 different radii CZTS-QDs elevates PCE to 14.96%. This enhancement occurs mainly due to the enhancement in absorption that enhances short-circuit current density (J sc ) and fill factor (FF). Finally, a layer of ZnO nanowires is added on top of the glass to reduce the reflection losses and absorption of ultraviolet light in the active layer that causes degradation and reduces the stability of organic solar cells (OSCs). The hybrid structure, thus simulated, has an enhanced PCE of 16.32% and is expected to be relatively more stable. It is expected that the results of this simulation may inspire all researchers interested in the fabrication of highly efficient hybrid OSCs.

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A low band gap donor–acceptor copolymer containing fluorene and benzothiadiazole units: synthesis and photovoltaic properties

Cited by 39 publications

References 47 publications

Effect of hexyl substituent groups on photophysical and electrochemical properties of the poly[(9,9‐Dioctyluorene)−2,7‐diyl‐alt‐(4,7‐bis (3‐Hexylthien‐5‐Yl)−2,1,3‐Benzothiadiazole)−2′,2″‐diyl]

Effect of hexyl substituent groups on photophysical and electrochemical properties of the poly[(9,9‐Dioctyluorene)−2,7‐diyl‐alt‐(4,7‐bis (3‐Hexylthien‐5‐Yl)−2,1,3‐Benzothiadiazole)−2′,2″‐diyl]

Polymer design for solar cell – Current trend and future scenario

Highly Efficient and Stable Solar Cells with Hybrid of Nanostructures and Bulk Heterojunction Organic Semiconductors

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