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

Isomerization Engineering of Solid Additives Enables Highly Efficient Organic Solar Cells via Manipulating Molecular Stacking and Aggregation of Active Layer DOI
Yawei Miao, Yanna Sun,

Wentao Zou

et al.

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(33)

Published: June 20, 2024

Morphology control is crucial in achieving high-performance organic solar cells (OSCs) and remains a major challenge the field of OSC. Solid additive an effective strategy to fine-tune morphology, however, mechanism underlying isomeric solid additives on blend morphology OSC performance still vague urgently requires further investigation. Herein, two based pyridazine or pyrimidine as core units, M1 M2, are designed synthesized explore working OSCs. The smaller steric hindrance larger dipole moment facilitate better π-π stacking aggregation M1-based active layer. M1-treated all-small-molecule OSCs (ASM OSCs) obtain impressive efficiency 17.57%, ranking among highest values for binary ASM OSCs, with 16.70% M2-treated counterparts. Moreover, it imperative investigate whether isomerization engineering works state-of-the-art polymer D18-Cl:PM6:L8-BO-based devices achieve exceptional 19.70% (certified 19.34%), work provides deep insights into design clarifies potential optimizing device through additives.

Language: Английский

Citations

31
Orientation Tuning by Modulating End Group of Small-Molecule Donors Boosts Efficiency of All-Small-Molecule Organic Solar Cells DOI

Ning Yang,

Du Hyeon Ryu,

Yongqi Bai

et al.

Published: Jan. 1, 2025

Language: Английский

Citations

0
Efficient All-Small-Molecule Organic Solar Cells Based on an Asymmetric Coumarin-Anthracene Donor DOI
Nirmala Niharika Bhuyan, Shyam Shankar S,

Moksyaraj Bhoi

et al.

ACS Applied Energy Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 12, 2025

Language: Английский

Citations

0
Tailoring selenium alkyl chain-containing small molecule donor enables efficient ternary solar cells with reduced charge recombination DOI

Gengsui Tian,

Yao Chen,

Dingqin Hu

et al.

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: 513, P. 163009 - 163009

Published: April 23, 2025

Language: Английский

Citations

0
Design of Halogenated Donors for Efficient All-Small-Molecular Organic Solar Cells DOI
Chenyang Zhang, Meijia Chang, Yuanyuan Zhang

et al.

ACS Materials Letters, Journal Year: 2024, Volume and Issue: 6(5), P. 1984 - 1991

Published: April 15, 2024

Precise adjustment of the nanoscale morphology within active layers is crucial for optimizing photovoltaic performance all-small-molecule organic solar cells (ASM-OSCs), and halogen substituent strategy materials plays a vital role in development evolution. In this work, we systematically study series acceptor–donor–acceptor (A-D-A) type small-molecule donors by incorporating halogenation at thienyl benzo[1,2-b:4,5-b′]dithiophene (BDT-T) donor core unit named BSTR-F, BSTR-Cl, BSTR-Br. Such demonstrated to induce significant increase ionization potential, i.e., deeper HOMO, more ordered packing property. Using N3 as acceptor, BSTR-F-based devices achieve power conversion efficiency (PCE) up 15.93%, compared with control nonhalogenated BSTR-H-based 13.80%, indicating that suitable could effectively promote high ASM-OSCs.

Language: Английский

Citations

3
Orientation Tuning by Modulating End Group of Small-Molecule Donors Boosts Efficiency of All-Small-Molecule Organic Solar Cells DOI

Ning Yang,

Du Hyeon Ryu,

Yongqi Bai

et al.

Dyes and Pigments, Journal Year: 2025, Volume and Issue: unknown, P. 112820 - 112820

Published: April 1, 2025

Language: Английский

Citations

0
Benzobisthiazole and rhodanine based low energy level small molecule donors for organic solar cells DOI
Dong Han, Shuguang Wen, Kai Song

et al.

Dyes and Pigments, Journal Year: 2024, Volume and Issue: unknown, P. 112564 - 112564

Published: Nov. 1, 2024

Language: Английский

Citations

1
An Insight into the Mechanism of Alkyl Side-Chain Engineering of BTCN on Its Photovoltaic Properties─A Theoretical Study DOI
Wencheng Li,

Zhijun Cao,

Jiaman Peng

et al.

The Journal of Physical Chemistry C, Journal Year: 2024, Volume and Issue: 128(31), P. 12829 - 12839

Published: July 31, 2024

Organic photovoltaic materials featuring thiophene-substituted benzo[1,2-b:4,5-b′]dithiophene (BDT-T) units show great potential. However, the influence of alkyl side-chain engineering on BDT-T in these remains elusive. In this study, we focused a high-performance small-molecule BTCN series with an acceptor–donor–acceptor architecture, where serves as donor. We systematically explored how varying number and positions chains lateral thiophene rings affects properties. The geometric parameters ground excited state properties were calculated using density functional theory (DFT) time-dependent DFT (TDDFT). experimentally observed differences performance between BTCN-M BTCN-O due to different substituted two can be explained well by our data. Furthermore, results that, out considered, BTCN-S1 which single-alkyl substitution is next sulfur atom molecule could promising donor since it has most negative average electrostatic potential strongest light absorption visible region. Lastly, compared double-alkyl-chain substitutions, single-chain unit decrease exciton binding energy but may increase singlet–triplet BTCNs. These findings offer valuable insights into for optimizing BDT-T-based organic 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