Journal of Materials Chemistry C, Journal Year: 2024, Volume and Issue: 12(39), P. 16184 - 16194
Published: Jan. 1, 2024
In this work, a series of D–A conjugated polymer donors (PBDT-BBTH, PBDT-BBTF and PBDT-BBTCl) was designed based on the benzobisthiazole (BBT) unit in 4,8-connection mode with benzodithiophene (BDT) linked by thiophene π-bridge.
Language: Английский
Small, Journal Year: 2025, Volume and Issue: 21(11)
Published: Feb. 7, 2025
Abstract A series of layered all‐polymer solar cells (LA‐PSCs) with the normal or inverted structure are prepared by employing a sequential spin‐coating method PBQx‐TCl, PM1 as polymer donor, and PY‐DT acceptor. The power conversion efficiency (PCE) LA‐PSCs can be improved from 17.20% to 18.34% incorporating 30 wt.% into PBQx‐TCl layer, resulting simultaneously increased J SC 25.35 mA cm −2 , V OC 0.971 FF 74.49%. PCE improvement also achieved PBQx‐TCl:PM1 donor layers. mixed prefer form alloyed states in LA‐PSCs, which confirmed gradually s more content Meanwhile, photogenerated excitons layers dissociated at interface between PM1, especially for located near ITO electrode. exciton dissociation provide an additional channel improving utilization efficiency, positive external quantum spectral difference (∆EQE) values Over 6.6% realized using layer.
Language: Английский
Citations
2
Materials Today Chemistry, Journal Year: 2024, Volume and Issue: 41, P. 102290 - 102290
Published: Sept. 8, 2024
Language: Английский
Citations
9
Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown
Published: Oct. 9, 2024
Abstract The ternary strategy has proven effective in enhancing the performance of organic solar cells (OSCs), yet identifying optimal third component remains a challenge due to lack theoretical frameworks for predicting its impact based on molecular structure. This study addresses this by proposing quantitative parameters derived from surface electrostatic potential (ESP) as criteria selecting components. asymmetric acceptor BTP‐OS, which exhibits lower total average ESP and larger polarization index relative host acceptor, is introduced into PM6:L8‐BO system. incorporation led weakened ESP‐induced intermolecular interactions reduce miscibility with donor polymer, resulting an optimized multi‐scale morphology blend. Consequently, device achieved efficiency 19.72%, one highest values PM6:L8‐BO‐based devices, enhanced exciton dissociation charge collection, energy disorder, minimized non‐radiative losses. Comparable improvements are also verified PM6:BTP‐eC9 D18:N3 systems, demonstrating broad applicability proposed approach. not only provides practical principle components but establishes broader framework optimizing OSCs, potentially advancing development more efficient OSCs across diverse material systems.
Language: Английский
Citations
8
ACS Materials Letters, Journal Year: 2024, Volume and Issue: 6(5), P. 1920 - 1928
Published: April 11, 2024
All-small-molecule OSCs (ASM-OSCs) have garnered significant attention for their inherent advantages, including low batch-to-batch variations and well-defined molecular structures. However, power conversion efficiencies (PCEs) are relatively inferior, mainly imputed to the challenges in controlling active layer morphologies. Herein, FSBTSeHR, a small-molecule donor (SMD) was added B1:BTP-eC9 blend. FSBTSeHR exhibits high crystallinity, improving packing ternary Furthermore, has better miscibility with host B1 than BTP-eC9, leading proper nanoscale phase separation morphology layer. The optimized facilitates charge transport extraction while suppressing recombination devices. Transient absorption spectroscopy (TAS) reveals rapid exciton dissociation diffusion process blend of B1:FSBTSeHR:BTP-eC9, which is consistent its improved morphology. Thus, device obtained remarkable PCE (17.04%), one highest values ASM-OSCs date.
Language: Английский
Citations
5
ACS Nano, Journal Year: 2024, Volume and Issue: unknown
Published: Dec. 25, 2024
Polythiophene donors offer scalable and cost-effective solutions for the organic photovoltaic industry. A thorough understanding of structure–property–performance relationship is essential advancing polythiophene-based solar cells (PTOSCs) with high power conversion efficiencies (PCEs). Herein, we develop two polythiophene donors─PTTz-CN PTTz-CN(T2)─to verify energy loss–quantum efficiency relationship. The strong preaggregation property PTTz-CN improves quantum in spite nonradiative recombination loss, while PTTz-CN(T2) chains are weakly preaggregated, causing low efficiency, accompanied by loss though. Synergistically optimized achieved judiciously mixing PTTz-CN(T2), delivering outstanding PCEs up to 16.4% PTOSC system 19.6% an archetype a high-performing OSC containing optimal PTTz-CN:PTTz-CN(T2) composition. We highlight significance desirable balance between via molecular interaction tuning improve performances.
Language: Английский
Citations
5
Materials Chemistry Frontiers, Journal Year: 2024, Volume and Issue: 8(15), P. 2657 - 2665
Published: Jan. 1, 2024
By incorporating an acceptor Y-TNF with a structure analogous to Y6 as the third component, nanofiber of active layer is further optimized, molecular arrangement more ordered, and PCE device reaches 18.1%.
Language: Английский
Citations
4
Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: unknown
Published: Dec. 18, 2024
The advent of next-generation nonfullerene acceptors (NFAs) has propelled major advances in organic solar cells (OSCs). Here we report an NFA design incorporating CF
Language: Английский
Citations
4
Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 28, 2025
Abstract All‐polymer solar cells (all‐PSCs), comprising polymer donors and polymerized small‐molecule acceptors (PSMAs), hold significant promise for industrial production owing to their superior device efficiencies stability. However, the lower molecular weights weaker crystallinity of PSMAs lead low electron mobility, while achieving high in all‐PSCs typically rely on use highly volatile chloroform. These challenges have been addressed through development self‐assembled monolayers (SAMs) as a novel interfacial layer, offering improved transparency, stability, sensitivity surface passivation. This research investigates SAMs, specifically 2PACz, hole transporting layer (HTL) all‐PSCs, employing sequential processing strategy with toluene solvent mitigate aforementioned challenges. study achieves efficient 2PACz‐based all‐PSC at 19.19% (certificated 18.51%), which is new record by non‐halogen solvents. Compared PEDOT:PSS‐based cells, performance devices can be attributed enlarged charge carrier prolonged lifetime, constrained recombination traps. Good generality 2PACz HTL observed PM6:PYF‐T‐ o PM6:PJ1‐γ systems outperform PEDOT:PSS counterparts. results demonstrate that SAMs are promising candidate transport engineering high‐performance all‐PSCs.
Language: Английский
Citations
0
Computational and Theoretical Chemistry, Journal Year: 2025, Volume and Issue: unknown, P. 115214 - 115214
Published: March 1, 2025
Language: Английский
Citations
0
Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(38)
Published: July 3, 2024
Developing novel n-type organic semiconductors is an on-going research endeavour, given their pivotal roles in electronics and relative scarcity compared to p-type counterparts. In this study, a new strategy was employed synthesize featuring fully fused conjugated backbone. By attaching two sets of adjacent amino formyl groups the indacenodithiophene-based central cores triggering tandem reaction sequence Knoevenagel condensation-intramolecular cyclization, DFA1 DFA2 were realized. The solution-processed field effect transistors based on exhibited unipolar transport character with decent electron mobility ca. 0.10 cm
Language: Английский
Citations
3