Research Progress of the FuranContaining Fused Ring Conjugated Organic Molecules and Polymers

Liu, Ye; Yuan, Jun; Zou, Yingping; Li, Yongfang

doi:10.6023/a16090495

Cited by 18 publications

(12 citation statements)

References 34 publications

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“…Electronic energy levels of Se46 and other photovoltaic materials were measured by electrochemical cyclic voltammetry with Ag/AgCl as a reference electrode and Fc/Fc + as an internal reference, 26 and the results are shown in Figure S6 in the SI. The estimated highest occupied molecular orbital (HOMO) energy level (E HOMO ) and E LUMO values of the donor and acceptors were summarized in Table 1, and the energy level diagrams are shown in Figure 1c.…”

mentioning

confidence: 99%

A-DA′D-A Type Acceptor with a Benzoselenadiazole A′-Unit Enables Efficient Organic Solar Cells

Xue

et al. 2023

ACS Energy Lett.

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confidence: 99%

A-DA′D-A Type Acceptor with a Benzoselenadiazole A′-Unit Enables Efficient Organic Solar Cells

Xue

et al. 2023

ACS Energy Lett.

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“…The carrier transport properties including the electron mobility (μ e ) and hole mobility (μ h ) of the D/A blended films were studied by the space-charge limited current (SCLC) method, and the corresponding curves and data of μ e and μ h for the D/A blended films are shown in Figures S5 and S6 and Table S1 in the SI. The μ h for the devices based on PD8-F:Y6 , PD8-Cl:Y6 , PD4-F:Y6 , and PD4-Cl:Y6 are 2.35 × 10 –4 , 2.66× 10 –4 , 6.51 × 10 –4 , and 3.82 × 10 –4 cm 2 V –1 s –1 , and their μ e are 1.43 × 10 –4 , 1.39× 10 –4 , 4.28 × 10 –4 , and 9.95 × 10 –5 cm 2 V –1 s –1 , respectively.…”

Section: Resultsmentioning

confidence: 99%

Enhanced Photovoltaic Performance of 9,10-Difluorodithieno[3,2-a:2′,3′-c]phenazine-Based Polymer Donors by the Synergistic Effect of Alkyl-Thiophene π-Bridges and Halogen Atom Modification

Yang,

Li,

Guo

et al. 2023

ACS Appl. Polym. Mater.

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The fused electron-accepting (A) unit 9,10-difluorodithieno[3,2-a:2′,3′-c]phenazine (FTP) was synthesized in a simple way with high yield by only one-step reaction. Then, four D–A copolymer donors, PD8-F, PD8-Cl, PD4-F, and PD4-Cl, were designed and synthesized based on FTP as the A-unit, benzodithiophene with halogen-substituted thiophene-conjugated side chains (BDTT) as the D-unit, and alkyl-thiophene as the π-bridge. It was found that the shorter alkyl chain length on the thiophene π-bridge could effectively improve the crystallinity of the polymers, and different halogen substitutions on the thiophene side chains of BDTT could finely regulate the energy levels of the polymers. The photovoltaic properties of the polymer donors were studied by fabricating the polymer solar cells (PSCs) with Y6 as an acceptor. It was found that the PSC with the F-substituted PD8-F as the donor had higher J sc and FF than the Cl-substituted PD8-Cl-based device. Furthermore, the crystallinity of the polymers PD4-F and PD4-Cl with short alkyl side chains on their thiophene π-bridge is enhanced. Finally, the power conversion efficiency (PCE) of the PD4-F-based PSCs reached 15.71% with a high J sc of 26.71 mA cm–2 and an FF of 68.41%, which was higher than that of the PCEs of 13.26, 13.59, and 13.61% for the devices based on PD4-Cl, PD8-F, and PD8-Cl, respectively. The results indicate that the FTP unit has great potential as an A-unit in designing high-performance D–A copolymer donors for PSCs. Moreover, the synergistic optimization of changing the alkyl chain length of the thiophene π-bridge and adjusting halogen substitution on the thiophene-conjugated side chain of BDTT D-unit is important for the high-performance D–A copolymer donors of the PSCs.

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“…Novel organic optoelectronic materials have obtained extensive attention in organic photovoltaics, field‐effect transistors, and light‐emitting diodes due to the rapid development of the current optoelectronic device and the market demand. Organic materials exhibit many intrinsic advantages, such as the diverse structural modifiability, flexibility and ductility, low‐cost device fabrication, and have inferior performance on carrier mobility.…”

Section: Background and Originality Contentmentioning

confidence: 99%

Theoretical Studies on Novel Gridspiroarenes: Structures, Noncovalent Interactions and Reorganization Energies

et al. 2019

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Summary of main observation and conclusion Organic semiconductor materials with low reorganization energy have various applications such as in organic light‐emitting diodes (OLEDs), organic field‐effect transistor (OFETs) and organic solar cells (OSCs). In this work, we have designed a new class of gridspiroarenes (GS‐SFX and GS‐SITF) with #‐shaped structures, which have novel crisscross geometrical structures compared to widely used spirocyclic arenes—SFX and SITF. The structure electronic properties, adiabatic ionization potentials (IPa), adiabatic electron affinities (EAa) and reorganization energies (λ) of GS‐SFX and GS‐SITF have been calculated using density functional theory (DFT) method. The calculated HOMO and LUMO spatial distributions suggest that GS‐SFX and GS‐SITF have better transport properties. The noncovalent interaction analysis shows the weak intramolecular interactions between their arms. The results indicate that the reorganization energies of GS‐SFX and GS‐SITF are significantly reduced compared to the dimer structures—DSFX and DSITF. Furthermore, the GS‐SITF1 which is one of the isomers of GS‐SITF exhibits the lowest values for λ(h) (0.067 eV) and λ(e) (0.153 eV). Therefore, we believe the predicted structure, electronic property, and reorganization energy are good indicator for transport materials. This work has systematically studied the effect of gridization, which provides insights to design organic semiconductor materials with excellent charge transport properties.

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Research Progress of the FuranContaining Fused Ring Conjugated Organic Molecules and Polymers

Cited by 18 publications

References 34 publications

A-DA′D-A Type Acceptor with a Benzoselenadiazole A′-Unit Enables Efficient Organic Solar Cells

A-DA′D-A Type Acceptor with a Benzoselenadiazole A′-Unit Enables Efficient Organic Solar Cells

Enhanced Photovoltaic Performance of 9,10-Difluorodithieno[3,2-a:2′,3′-c]phenazine-Based Polymer Donors by the Synergistic Effect of Alkyl-Thiophene π-Bridges and Halogen Atom Modification

Theoretical Studies on Novel Gridspiroarenes: Structures, Noncovalent Interactions and Reorganization Energies

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