Energy & Environmental Science, Journal Year: 2024, Volume and Issue: 17(22), P. 8954 - 8965
Published: Jan. 1, 2024
Interpretable machine learning identifies the causal structure–property relationships and key control factors in block copolymer organic solar cells with excellent power conversion efficiency thermal stability.
Language: Английский
Advanced Materials, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 6, 2025
The long exciton diffusion length (LD) plays an important role in promoting dissociation, suppressing charge recombination, and improving the transport process, thereby performance of organic solar cells (OSCs), especially thick-film OSCs. However, limited LD hinders further improvement device as film thickness increases. Here, organic-metal platinum complex, namely TTz-Pt, is synthesized served a solid additive into D18-Cl:L8-BO system. addition TTz-Pt enhanced crystallinity blends, reduced energy disorder, trap density, decreased non-radiative recombination binding energy, which conducive to prolonging TTz-Pt-treated film, facilitating dissociation process along with inhibiting recombination. Consequently, D18:L8-BO:IDIC (100 nm) exhibits champion power conversion efficiency (PCE) 20.12% (certified 19.54%), one highest PCEs reported for OSCs date. Remarkably, record-breaking PCE 18.84% yielded active layer 300 nm. Furthermore, superior universality This work provides simple universal approach extending by introducing complex achieve highly efficient
Language: Английский
Citations
2
Advanced Science, Journal Year: 2024, Volume and Issue: 11(31)
Published: June 17, 2024
Abstract Halogenation of Y‐series small‐molecule acceptors (Y‐SMAs) is identified as an effective strategy to optimize photoelectric properties for achieving improved power‐conversion‐efficiencies (PCEs) in binary organic solar cells (OSCs). However, the effect different halogenation 2D‐structured large π‐fused core guest Y‐SMAs on ternary OSCs has not yet been systematically studied. Herein, four 2D‐conjugated (X‐QTP‐4F, including halogen‐free H‐QTP‐4F, chlorinated Cl‐QTP‐4F, brominated Br‐QTP‐4F, and iodinated I‐QTP‐4F) by attaching halogens into 2D‐conjugation extended dibenzo[ f , h ]quinoxaline are developed. Among these X‐QTP‐4F, Cl‐QTP‐4F a higher absorption coefficient, optimized molecular crystallinity packing, suitable cascade energy levels, complementary with PM6:L8‐BO host. Moreover, among PM6:L8‐BO:X‐QTP‐4F blends, PM6:L8‐BO:Cl‐QTP‐4F obtains more uniform size‐suitable fibrillary network morphology, well vertical phase distribution, thus boosting charge generation, transport, extraction, suppressing loss OSCs. Consequently, PM6:L8‐BO:Cl‐QTP‐4F‐based achieve 19.0% efficiency, which state‐of‐the‐art based superior devices host (17.70%) guests H‐QTP‐4F (18.23%), Br‐QTP‐4F (18.39%), I‐QTP‐4F (17.62%). The work indicates that promising gain efficient
Language: Английский
Citations
13
Advanced Science, Journal Year: 2024, Volume and Issue: 11(25)
Published: April 18, 2024
Abstract The energy loss induced open‐circuit voltage ( V OC ) deficit hampers the rapid development of state‐of‐the‐art organic solar cells (OSCs), therefore, it is extremely urgent to explore effective strategies address this issue. Herein, a new volatile solid additive 1,4‐bis(iodomethyl)cyclohexane (DIMCH) featured with concentrated electrostatic potential distribution utilized act as morphology‐directing guest reduce in multiple state‐of‐art blend system, leading one highest efficiency (18.8%) at forefront reported binary OSCs. Volatile DIMCH decreases radiative/non‐radiative recombination (Δ E 2 /Δ 3 by rationally balancing crystallinity donors and acceptors realizing homogeneous network structure crystal domain reduced D–A phase separation during film formation process weakens disorder trap density It believed that study brings not only profound understanding emerging additives but also hope further improve performance
Language: Английский
Citations
10
ACS Nano, Journal Year: 2025, Volume and Issue: unknown
Published: Feb. 6, 2025
Silver sulfide nanocrystals (Ag2S NCs) with second near-infrared (NIR-II) emission and excellent biocompatibility hold great attraction for in vivo imaging. However, current Ag2S NCs suffer severely low photoluminescence quantum yields (PLQYs), limiting the penetration depth. Herein, based on computational prediction, we proposed a facile synchronous passivation strategy employing non-toxic MgCl2 as passivator simultaneous Mg-doping chlorination of (Syn-Ag2S). Spectroscopic studies including femtosecond transient absorption measurement (fs-TAS) temperature-dependent PL spectra revealed that syn-passivation successfully enlarged nonradiative activation energy reduced defect states exciton-photon interaction, thus resulting record high absolute PLQY 46 ± 2% at 1220 nm among toxic-element-free NIR-II probes. The boosted unlocks potential deep lymph node profile lumbar nodes was clearly distinguished by Syn-Ag2S, while clinical indocyanine green (ICG) failed to do so. This also establishes an approach developing other ultrabright used not only bioimaging but photovoltaics LEDs.
Language: Английский
Citations
1
Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 160740 - 160740
Published: Feb. 1, 2025
Language: Английский
Citations
1
Journal of Materials Chemistry A, Journal Year: 2024, Volume and Issue: 12(20), P. 12208 - 12215
Published: Jan. 1, 2024
A solid additive, SA-5F, is employed to promote molecular stacking, which leads higher crystallinity, boosting the exciton diffusion coefficient and then length. Thus, D18/Y6+-based PPHJ OSCs afford an impressive PCE of 19.11%.
Language: Английский
Citations
8
Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: unknown
Published: Dec. 3, 2024
Minimizing energy loss is crucial for breaking through the efficiency bottleneck of organic solar cells (OSCs). The main mechanism can be attributed to non-radiative recombination (ΔEnr) that occurs due exciton-vibration coupling. To tackle this challenge, tuning intramolecular noncovalent interactions strategically utilized tailor novel fused ring electron acceptors (FREAs). Upon comprehensive analysis both theoretical and experimental results, approach effectively enhance molecular rigidity, suppress structural relaxation, reduce exciton reorganization energy, weakens coupling strength. Consequently, binary OSC device based on Y-SeSe, which features dual strong Se ⋅ O interactions, achieves an outstanding power conversion (PCE) 19.49 %, accompanied by extremely small ΔEnr 0.184 eV, much lower than those Y-SS Y-SSe devices with weaker interactions. These achievements not only set record selenium-containing OSCs, but also mark lowest reported value among high-performance devices. Furthermore, ternary blend showcases a remarkable PCE 20.51 one highest PCEs single-junction OSCs. This work demonstrates effectiveness in suppressing coupling, thereby achieving low-energy-loss high-efficiency
Language: Английский
Citations
6
Journal of Materials Chemistry A, Journal Year: 2024, Volume and Issue: 12(18), P. 10984 - 10990
Published: Jan. 1, 2024
Two ternary polythiophenes (PTs), PT-CN and PT-2CN, as donors are developed to deepen energy levels, reduce miscibility regulate crystallinity. PT-CN:BTP-eC9 based OSCs gain an impressive PCE of 17.27%, which is the record for PT-based OSCs.
Language: Английский
Citations
4
Advanced Science, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 27, 2025
Abstract Polycyclic multiple resonance (MR) molecules reveal narrowband emission, making them very promising emitters for high color purity display. Nevertheless, they still have challenges such as aggregation‐induced emission quenching and spectral broadening. Overcoming these obstacles requires an in‐depth understanding of the correlations among alterations in their geometries, packing structures, molecular vibrations corresponding changes photoluminescence (PL) properties. Herein, it is demonstrated that high‐pressure infrared, UV−visible absorption, fluorescence spectroscopies can be combined with computational results to elucidate influence subtle structural variations on exciton‒vibration couplings PL An ortho‐carborane‐decorated MR emitter (BNC) a piezochromic molecule exhibits enhancement under pressure. A thorough analysis situ experimental measurements calculated reveals pressure‐induced exciton binding energy are responsible unusual piezochromism. This research provides insights into structure‒fluorescence relationship potential techniques optimize materials advanced organic light‐emitting diodes (OLEDs) applications.
Language: Английский
Citations
0
Advanced Science, Journal Year: 2025, Volume and Issue: unknown
Published: Feb. 6, 2025
Suppressing the non-radiative loss in organic solar cells (OSCs) through molecular design remains a significant challenge. Typically, triplet state of semiconductors is lower than charge transfer (CT) state, contributing to substantial via state. Herein, set terpolymers prepared by introducing simple Pt complex block into PM6 polymer backbone. These metalated exhibit high energy (ET1) and small singlet-triplet gap (∆EST), facilitating fast intersystem crossing (ISC) process generate excitons. Consequently, show enhanced exciton lifetime diffusion length, most importantly, effectively suppress recombination terminal channels. Moreover, modifies aggregation polymer, hence optimizing morphology active blends. The PM6-Pt1:L8-BO devices achieve champion power conversion efficiency (PCE) 18.54% (certified as 18.32%), highest reported for date. PCE further increased record 19.24% PM6-Pt1:PM6:L8-BO (0.8:0.2:1.2, wt/wt/wt) ternary devices. Overall, this work provides feasible approach designing with ET1, thereby reducing OSCs.
Language: Английский
Citations
0