Science China Chemistry, Journal Year: 2024, Volume and Issue: unknown
Published: Nov. 14, 2024
Language: Английский
National Science Review, Journal Year: 2024, Volume and Issue: 11(12)
Published: Nov. 4, 2024
ABSTRACT Solid additive engineering has been intensively explored on morphology tuning for highly efficient all-polymer solar cells (all-PSCs), a promising photovoltaic technology towards multi-scenario application. Although the nano-fibrillar network of active layer induced by treatment is confirmed as key factor power conversion efficiency (PCE) all-PSCs, its formation mechanism not clearly revealed, lack precise and convincing real-time observation crystallization phase separation during liquid-to-solid transition process spin-coating. Herein we report an in-situ grazing incidence wide-angle/small-angle X-ray scattering (GIWAXS/GISAXS) screening that reveals fact naphthalene derived solid additives can suppress aggregation polymer acceptor (PY-IT) at beginning stage spin coating, which provides sufficient time space donor (PM6) to form fibril structure. Moreover, guided this knowledge, ternary system proposed, achieves cutting-edge level PCEs both small-area (0.04 cm2) (also decent operational stability) large-area (1 devices.
Language: Английский
Citations
9
Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 159972 - 159972
Published: Jan. 1, 2025
Language: Английский
Citations
1
Advanced Science, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 14, 2025
Abstract A highly electron‐rich S,N heteroacene building block is developed and condensed with FIC Cl‐IC acceptors to furnish CT‐F CT‐Cl, which exhibit near‐infrared (NIR) absorption beyond 1000 nm. The C‐shaped CT‐Cl self‐assemble into a ordered 3D intermolecular packing network via multiple π−π interactions in the single crystal structures. CT‐F‐based organic photovoltaic (OPV) achieved an impressive efficiency of 14.30% broad external quantum response extending from UV‐vis NIR (300–1050 nm) regions, outperforming most binary OPVs employing A‐D‐A‐type acceptors. possesses higher surface energy than CT‐F, promoting vertical phase segregation resulting its preferential accumulation near bottom interface blend. This arrangement, combined lower HOMO level effectively reduces undesired hole electron injection under reverse voltage. PM6:CT‐Cl‐based photodetectors (OPDs) devices ultra‐high shot‐noise‐limited specific detectivity ( D sh *) values exceeding 10 14 Jones region 620 nm, reaching unprecedentedly high value 1.3 × at 950 When utilizing 780 nm light source, OPDs show record‐high rise/fall times 0.33/0.11 µs exceptional cut‐off frequency f ‐3dB ) 590 kHz −1 V.
Language: Английский
Citations
0
ACS Applied Polymer Materials, Journal Year: 2025, Volume and Issue: unknown
Published: Feb. 5, 2025
We investigated the performance of a terpolymer, PM1, as third component in two donor–one acceptor-based ternary organic photovoltaics (OPVs). derivative PM6, incorporates 20% thiophene-thiazolothiazole (TTz) monomers, expanding its structural diversity and featuring lower highest occupied molecular orbital (HOMO) energy level compared to that PM6. To investigate impact we fabricated p–i–n-structured OPVs with following layer configuration: ITO/PEDOT:PSS/PM6:Y6 (or BTP-eC9) or without PM1/PFN-Br/Ag. By examining miscibility blend film morphology, explored how these factors influence carrier dynamics ultimately OPV performance. The high compatibility between PM1 PM6 (χPM6-PM1 = 0.003) facilitated formation well-mixed donor phase, akin an alloy. This homogeneous promoted efficient charge transport suppressed trap-assisted recombination within film. Consequently, PM1-based exhibited reduced nonradiative recombination, leading increased open-circuit voltage (VOC) overall device efficiency. optimal power conversion efficiencies using Y6 BTP-eC9 acceptors reached 17.09 17.60%, respectively. Our findings highlight potential terpolymers promising materials for OPVs, paving way innovative polymer design strategies.
Language: Английский
Citations
0
Nature Communications, Journal Year: 2025, Volume and Issue: 16(1)
Published: Feb. 10, 2025
Abstract Minimizing the energy loss, particularly non-radiative loss (Δ E nr ), without sacrificing charge collection efficiency, is key to further improve photovoltaic performance of organic solar cells (OSCs). Herein, we proposed an asymmetric molecular design strategy, via developing alkyl/thienyl hybrid side chain based small molecule acceptors (SMAs) BTP-C11-TBO and BTP-BO-TBO, manipulate intermolecular interactions realize enhanced luminescence efficiency reduced loss. Theoretical experimental results indicate that compared three symmetric SMAs BTP-DC11, BTP-DTBO BTP-DBO, BTP-BO-TBO exhibit repressed electron-vibration coupling Δ . Moreover, nature allows formation multiple D:A interfacial conformations energies, which have made charge-transfer state energies closer strongly absorbing (and emitting) local-exciton state, thus gaining low while maintaining efficient exciton dissociation. Consequently, PM6:BTP-BO-TBO-based OSCs achieve a higher power conversion 19.76%, with high open circuit voltage 0.913 V fill factor 81.17%, profiting from more improved balanced mobility longer carrier lifetime. This work provides ideas suppress nonradiative decay paves way obtain high-performance OSCs.
Language: Английский
Citations
0
Angewandte Chemie, Journal Year: 2025, Volume and Issue: unknown
Published: March 12, 2025
Abstract The integration of organic dyes in perovskite solar cells (PSCs) to utilize near‐infrared (NIR) photons remains a challenge. In this study, selenium‐incorporated ortho‐benzodipyrrole‐based NIR dye CB‐2Se was developed. CB‐2Se, featuring lower bandgap 1.35 eV, blended with PCBM form bulk‐heterojunction layer PSCs for electron extraction and transport. Compared Y6‐16 acceptor, the removal Tz unit suppresses self‐aggregation, improving its compatibility PCBM. A CB‐2Se:PCBM‐incorporated PSC achieved remarkable power conversion efficiency (PCE) 25.18% V OC 1.164 V, J SC 25.71 mA/cm 2 , Fill Factor 84.15%, outperforming that PCBM‐only reference device (24.35%) PCBM:Y6‐16‐based (24.49%). PCBM:CB‐2Se enhanced long‐term stability PSCs, retaining 88% initial after 1000 h under ambient air thermal conditions. photophysical interactions between have been comprehensively investigated by using femtosecond transient absorption spectroscopy. Ultrafast exciton separation into free charges occurs within 200 femtoseconds at interfaces CB‐2Se. For first time, transfer holes from back detected, providing valuable insights charge dynamics utilizing dyes.
Language: Английский
Citations
0
Small, Journal Year: 2025, Volume and Issue: unknown
Published: April 21, 2025
Abstract A novel A‐D‐A type small molecule (DTP‐2EH‐IO2Cl) incorporating dithiophenepyrrole (DTP) core with indene‐dione (IO2Cl) side chain an intermediate band gap and rigid structure is incorporated into polymer donor PM6 one of the three A−DA′D−A acceptor—L8‐BO, BTP‐eC9 or Y6—for ternary‐blend organic photovoltaics (OPVs). The third component DTP‐2EH‐IO2Cl induces not only energy transfer but also stronger molecular packing acceptors, resulting in a larger coherence length enhanced absorption that enhances devices’ power conversion efficiencies (PCE) thermal stability. PCE values champion devices PM6:L8‐BO, PM6:BTP‐eC9, PM6:Y6 are 19.2, 18.3, 17.6%, respectively, versus 16.5, 15.8, 15.4% for their corresponding binary blend devices, displaying relative increases from 14 to 16%. stability (T 80 ) PM6:L8‐BO: ternary device dramatically 568 h 57 PM6:L8‐BO device. These enhancements can be attributed effectiveness as increasing light through inducing intermolecular providing effective way tune morphology boost both OPVs.
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
Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown
Published: Sept. 26, 2024
Abstract Phenazine‐based small molecular acceptors (SMAs), which benefit from the reduced energy loss ( E ), have emerged as promising candidates for achieving high‐efficiency organic solar cells (OSCs). Nevertheless, potential advancements of phenazine‐based photovoltaic devices are hindered by constrained short‐circuit current J sc ). Though incorporation selenium (Se) atoms has been proven effective in enhancing , it simultaneously introduces disorder stacking and charge recombination. Based on desire to harness full phenazine structure benefits Se substitution, a series Se‐substituted SMAs, namely PzIC‐SSe‐4F PzIC‐SeSe‐4F meticulously synthesized. Due increased photon harvesting capabilities, device using demonstrated significantly 27.73 mA cm −2 . Remarkably, PzIC‐SeSe‐4F‐based displayed an astonishing open circuit voltage V oc ) 0.873 V, representing highest recorded among all reported symmetric Y‐series SMAs‐based devices. Thanks synergistic effect central cores PM6:PzIC‐SeSe‐4F‐based achieves power conversion efficiency (PCE) 17.69%. The findings serve pivotal reference further development
Language: Английский
Citations
2
Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown
Published: Nov. 12, 2024
Abstract P‐type carbazole‐derived self‐assembled monolayers (SAMs) have garnered significant attention as promising hole transport layers (HTLs) in the development of highly efficient organic solar cells (OSCs). However, it still lacks effective navigation to modulate terminal functional groups SAMs achieve a compromise between highest occupied molecular orbital (HOMO) energy levels and self‐aggregation behavior. Herein, are adjusted three synthesized, namely, t‐Bu‐3PACz, Ph‐3PACz, Bz‐3PACz comprehensively investigate their intrinsic properties influence on photovoltaic performance. Among them, Ph‐3PACz featuring an exceptionally suitable conjugated region steric hindrance exhibits best compatibility with active layer, superior electrical conductivity, HOMO level aligning polymer donor, ordered film packing. As result, devices based exhibit open‐circuit voltage ( V OC ) 0.850 V, short‐circuit current density J SC 28.7 mA cm −2, fill factor (FF) 78.5%, thus resulting remarkable power conversion efficiency (PCE) 19.2%. This work provides easily navigable method packing SAMs, thereby achieving OSCs.
Language: Английский
Citations
2