Impact of Different π-Bridges on the Photovoltaic Performance of A-D-D′-D-A Small Molecule-Based Donors DOI Creative Commons
Lingjun Yang, Yu Wu, Pachaiyappan Murugan

et al.

Molecules, Journal Year: 2024, Volume and Issue: 29(17), P. 4231 - 4231

Published: Sept. 6, 2024

Three small donor molecule materials (S1, S2, S3) based on dithiophene [2,3-d:2′,3′-d′]dithiophene [1,2-b:4,5-b′]dithiophene (DTBDT) utilized in this study were synthesized using the Vilsmeier–Haack reaction, traditional Stille coupling, and Knoevenagel condensation. Then, a variety of characterization methods applied to differences optical properties photovoltaic devices among three. By synthesizing S2 thiophene π-bridge S1, blue shift ultraviolet absorption can be enhanced, band gap energy level reduced, open circuit voltage (VOC) increased 0.75 V S2:Y6 device, power conversion efficiency (PCE) 3% achieved. Also, after developing device Y6, S3 introduced alkyl chain which improved solubility tiny molecules, achieved maximum short-circuit current (JSC = 10.59 mA/cm2), filling factor (FF 49.72%), PCE (4.25%). Thus, viable option for future design synthesis is incorporate π-bridges into these materials, along with chains, order enhance device’s morphology charge transfer behavior.

Language: Английский

Accessing Poly(DA-ran-Dπ) Ternary Copolymers via Direct C–H Arylation for Ultrahigh Photocatalytic Hydrogen Production DOI
Hao Gong, Jinhua Li, Zhenghui Xie

et al.

Macromolecules, Journal Year: 2024, Volume and Issue: 57(15), P. 7208 - 7218

Published: Aug. 1, 2024

π-Conjugated polymers (CPs) bearing alternating electron donor–acceptor (D–A) blocks have been widely exploited as promising photocatalysts for hydrogen production. However, little attention has paid to the D–A ternary polymer photocatalysts, and current investigations on such a system are mainly focused D−π–A type by inserting π-bridge between D A units. Herein, new of polymeric namely poly(DA-ran-Dπ), were designed facilely constructed via atom-economical direct C–H arylation polymerization (DArP), in which benzothiophene-5,5-dioxide (DBTSO2), 3,4-ethylenedioxythiophene (EDOT), phenyl serve acceptor, donor, π-spacer, respectively. Our findings reveal that DBTSO2, EDOT, building can exert synergic effects promoting hydrophilicity, interactions, charge separation resulting CPs. Compared binary EDBz-0, EDBz-25 exhibits much superior photocatalytic performance, yielding evolution rate up 241.5 mmol g–1 h–1 with an unprecedented apparent quantum yield 28.62% at 500 nm wavelength without aid Pt cocatalyst. The water-displacing setup reveals 91 mL H2 gas be quickly produced within 2 h using only 3 mg photocatalyst. construction CPs DArP, developed work, offers opportunity design green synthesis semiconductors renewable energy applications.

Language: Английский

Citations

6
Dimeric BODIPY Donors Based on the Donor–Acceptor Structure for All-Small-Molecule Organic Solar Cells DOI
Le Wang,

Minhao Zhu,

Tingting Gu

et al.

ACS Applied Energy Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 26, 2024

Herein, we have designed and synthesized two dimeric BODIPY consisting of a donor–acceptor backbone, in which electron-withdrawing groups penta-fluorophenyl were introduced at the meso-position core different electron-donating triphenylamine (ZMH-3) carbazole (ZMH-4) 3,5-positions moieties. Both ZMH-3 ZMH-4 showed optical band gaps 1.49 1.39 eV, with deeper highest occupied molecular orbital energy levels −5.61 −5.59 respectively. Moreover, dipole moments ZMH-4, estimated from DFT simulations, are 5.065 4.49 D, respectively, indicating that excitons generated exist lower binding energy, is beneficial for efficient exciton dissociation. Considering these levels, selected nonfullerene acceptor ITIC (complementary absorption spectra suitable levels) as acceptor. After optimization, organic solar cells based on attained power conversion efficiencies about 12.26 8.23%, The enhanced value efficiency ZMH-3-based OSCs attributed to dissociation efficiency, more charge transport extraction, suppressed recombination.

Language: Английский

Citations

2
Direct arylation-derived non-ionic star-shaped oligomeric CIL materials with Dramatically reduced work functions for organic solar cells DOI
Peng Liu, Yu Wu, Pachaiyappan Murugan

et al.

Materials Today Chemistry, Journal Year: 2024, Volume and Issue: 40, P. 102247 - 102247

Published: Aug. 14, 2024

Language: Английский

Citations

0
Direct C–H Arylation-Derived Oligomeric Building Blocks Incorporated into Conjugated Polymers for Organic Solar Cell Applications DOI
Lingjun Yang, Yu Wu, Pachaiyappan Murugan

et al.

ACS Applied Polymer Materials, Journal Year: 2024, Volume and Issue: 6(16), P. 10062 - 10071

Published: Aug. 6, 2024

In this work, three conjugated oligomeric building blocks (BDD2, BDD3, and BDD4) containing respectively two, three, four 1,3-bis(4-(2-ethylhexyl)thiophen-2-yl)-5,7-bis(2-alkyl)benzo[1,2-c:4,5-c′]dithiophene-4,8-dione (BDD) units with conjugation lengths that increase continuously were facilely produced in a single pot of direct C–H arylation (DACH). The integration the above BDD derivatives BDT produces polymers steadily elongated (i.e., PB(DB)2-T2F, PB(DB)3-T2F, PB(DB)4-T2F) as series PBDB-T2F (also known PM6) analogues. According to gel permeation chromatography analysis, short conjugate length PB(DB)2-T2F high homogeneous molecular weight is advantageous for charge transfer. By incorporating acceptor Y6 into bulk heterojunction (BHJ) system, blend film was able achieve excellent phase separation nanofiber structure, which turn enhanced exciton dissociation collection. As result, PB(DB)2-T2F:Y6 device power conversion efficiency (PCE) 10.84%. incorporation monomers polymers, developed current opens an avenue access thus enriches library organic electronic materials.

Language: Английский

Citations

0
Impact of Different π-Bridges on the Photovoltaic Performance of A-D-D′-D-A Small Molecule-Based Donors DOI Creative Commons
Lingjun Yang, Yu Wu, Pachaiyappan Murugan

et al.

Molecules, Journal Year: 2024, Volume and Issue: 29(17), P. 4231 - 4231

Published: Sept. 6, 2024

Three small donor molecule materials (S1, S2, S3) based on dithiophene [2,3-d:2′,3′-d′]dithiophene [1,2-b:4,5-b′]dithiophene (DTBDT) utilized in this study were synthesized using the Vilsmeier–Haack reaction, traditional Stille coupling, and Knoevenagel condensation. Then, a variety of characterization methods applied to differences optical properties photovoltaic devices among three. By synthesizing S2 thiophene π-bridge S1, blue shift ultraviolet absorption can be enhanced, band gap energy level reduced, open circuit voltage (VOC) increased 0.75 V S2:Y6 device, power conversion efficiency (PCE) 3% achieved. Also, after developing device Y6, S3 introduced alkyl chain which improved solubility tiny molecules, achieved maximum short-circuit current (JSC = 10.59 mA/cm2), filling factor (FF 49.72%), PCE (4.25%). Thus, viable option for future design synthesis is incorporate π-bridges into these materials, along with chains, order enhance device’s morphology charge transfer behavior.

Language: Английский

Citations

0