Preparation-Dependent Photocatalytic Hydrogen Evolution by Organic Semiconducting Nanoparticles DOI
Zi Goh, Andrew Dolan, Jessica M. de la Perrelle

et al.

ACS Applied Nano Materials, Journal Year: 2024, Volume and Issue: 7(22), P. 25544 - 25555

Published: Nov. 7, 2024

The molecular packing, intermixing, and crystallinity of organic semiconductors are crucial in determining the performance photovoltaic photocatalytic systems. effects these factors on have been thoroughly investigated for thin-film systems, but not nanoparticulate as control packing has limited is challenging Here, we investigate how miniemulsion (ME), reprecipitation (RP), a cold RP method affect and, turn, nanoparticles (NPs), using nonfullerene acceptor Y6 alongside conjugated polymer donors P3HT PIDT-T8BT. RP-based neat NPs exhibit increased relative to ME-based due greater exciton dissociation. produce hydrogen at rate 8 mmol g–1 h–1, which similar other previously studied high-performing catalysts, without need donor material. P3HT:Y6 low performance, likely high miscibility well mobility holes domains. In contrast, PIDT-T8BT:Y6 significant rates evolution. outperform ME higher degree intermixing. This work highlights carefully consider NP preparation when preparing systems its extensive effect material morphology performance.

Language: Английский

Over 19.2% Efficiency of Layer‐By‐Layer Organic Photovoltaics by Ameliorating Exciton Dissociation and Charge Transport DOI Open Access

Hongyue Tian,

Hang Zhou, Lu Zhang

et al.

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 26, 2025

Abstract Layer‐by‐layer (LbL) organic photovoltaics (OPVs) are fabricated with polymer PM1 as donor and small molecule L8‐BO acceptor by employing sequential spin‐coating technology. The BTP‐eC9 PTAA deliberately selected for individually incorporating into layer layer, resulting in the power conversion efficiency (PCE) increased from 18.22% to 19.23%. improvement of performance is attributed synergistically short circuit current density ( J SC ) 27.78 mA cm −2 fill factor (FF) 78.23%. introduction can promote photogenerated exciton dissociation, especially excitons near anode. Meanwhile, molecular crystallinity also enhanced appropriate layer. incorporation provide hole transport channels effectively improve holes generated self‐dissociation L8‐BO, FFs 77.40% synergistic effects layers result a 19.23% PCE optimized LbL‐OPVs. This work demonstrates that there great room hierarchically optimize achieving highly efficient

Language: Английский

Citations

3
New breakthrough in dye removal: Ultrafast removal of high concentration MB with biochar-based organic photocatalysts under indoor light (30W/m2) drive DOI
Songlin Cai, Ciyuan Huang, Cai‐Yun Wang

et al.

Journal of Cleaner Production, Journal Year: 2024, Volume and Issue: 449, P. 141539 - 141539

Published: March 9, 2024

Language: Английский

Citations

15
From light to hydrogen: the complete life cycle of free charges in organic photocatalytic nanoparticles DOI
Jessica M. de la Perrelle, Rohan J. Hudson, Andrew Dolan

et al.

Sustainable Energy & Fuels, Journal Year: 2024, Volume and Issue: 8(14), P. 3145 - 3163

Published: Jan. 1, 2024

A complete picture of charge generation over 11 orders magnitude in time the high-performance PM6:Y6 organic-semiconductor blend from donor and acceptor excitation is obtained using ultrafast spectroscopy kinetic modeling.

Language: Английский

Citations

4
Achieving Stable Organic Solar Cells with 19.2% Efficiency via Fine Interpenetrating Network with Fused-ring Aromatic Lactone Donor DOI

Jiangfeng Wang,

Zhixin Liu, Jianpeng Xu

et al.

Nano Energy, Journal Year: 2024, Volume and Issue: 131, P. 110246 - 110246

Published: Sept. 10, 2024

Language: Английский

Citations

4
Polymerized Small‐Molecule Acceptors with Linker Length‐Dependent Photocatalytic Activity for High‐Performance Solar Hydrogen Evolution DOI Open Access

Jingcheng Zhao,

Yulu Liu,

Ruiqi An

et al.

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 13, 2025

Abstract Developing organic semiconductor photocatalysts with alterable optical properties and excitonic behaviors for photocatalytic hydrogen evolution has received significant attention recently. Herein, three polymerized small‐molecule acceptors (PSMAs) different linker lengths, namely PY‐1T, PY‐2T PY‐3T, are designed synthesized to construct nano‐photocatalysts. In comparison YDT, these PSMAs exhibit broader absorption in both visible near‐infrared (NIR) light region as well enlarged exciton diffusion length. the meanwhile, intramolecular charge transfer separation is promoted by varying length, leading enhanced harvesting utilization. As a result, single‐component nano‐photocatalyst based on PY‐3T achieves an impressive average rate (HER) of 400.3 mmol h −1 g under AM 1.5G sunlight (100 mW cm −2 ), which ≈48 times greater than that YDT NPs (8.3 ). These results not only prove potential developing extended chain length efficient photocatalysts, but also elucidate importance regulating designing high‐performance photocatalysts.

Language: Английский

Citations

0
A Platinum Complex‐Based Dimerized Electron Acceptor for Efficient Organic Solar Cells DOI Open Access
Cheng Yang, Dongcheng Jiang, Chengyi Xiao

et al.

Advanced Energy Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 3, 2025

Abstract Metal–organic complexes have demonstrated excellent performance in organic light‐emitting diodes, yet their potential solar cells (OSCs) remains underexplored. In this study, a novel metal–organic complex, Pt‐Y, which features platinum core connected to Y‐acceptor arms, for application OSCs is designed and synthesized. The dimerized Pt‐Y acceptor prepared through straightforward reactions, with the key precursor linking metal Y‐acceptors synthesized Sonogashira coupling. Steady‐state transient photoluminescence measurements revealed that exhibits distinct singlet triplet states microsecond lifetimes—significantly longer than nanosecond lifetimes of without metal. Incorporating as third component ternary has resulted remarkable efficiency 19.2%. Further morphological analysis absorption indicate displays miscibility Y‐acceptor, leading minimal phase separation formation fibrillar structures. These structures enhance charge transport while reducing recombination. This work presents facile approach developing exceptional photovoltaic OSCs.

Language: Английский

Citations

0
Arrangement of Ordered D–A Components in a Metal‐Organic Framework for Cocatalyst‐Free Photocatalytic Hydrogen Evolution with Efficient Proton Conduction DOI Open Access
Ning Liu, Jialong Jiang, Shiqi Zhang

et al.

Angewandte Chemie International Edition, Journal Year: 2025, Volume and Issue: unknown

Published: March 11, 2025

Abstract The arrangement of donor–acceptor (D–A) components in order at a molecular level provides means to achieve efficient electron‐hole separation for promoting the activity photocatalysts. Herein, we report coordination assembly D–A molecules with desired staggered energy levels two isostructural metal‐organic frameworks (MOFs) 1 and 2 , which exhibit high photocatalytic hydrogen evolution without using any cocatalysts photosensitizers. modulation active metal sites MOFs leads an increase rates from 1260 3218 µmol h −1 g . A detailed mechanism study revealed that bond defined by assisted centers is key efficiently generating photogenerated charge carriers, has appropriate affinity proton reduce barrier evolution. Besides, enhanced transport kinetics based on arrayed free carboxyl groups hydrogen‐bonded network endows higher conductivity than thus usage rate reaction kinetics.

Language: Английский

Citations

0
Arrangement of Ordered D–A Components in a Metal‐Organic Framework for Cocatalyst‐Free Photocatalytic Hydrogen Evolution with Efficient Proton Conduction DOI Open Access
Ning Liu, Jialong Jiang, Shiqi Zhang

et al.

Angewandte Chemie, Journal Year: 2025, Volume and Issue: unknown

Published: March 11, 2025

Abstract The arrangement of donor–acceptor (D–A) components in order at a molecular level provides means to achieve efficient electron‐hole separation for promoting the activity photocatalysts. Herein, we report coordination assembly D–A molecules with desired staggered energy levels two isostructural metal‐organic frameworks (MOFs) 1 and 2 , which exhibit high photocatalytic hydrogen evolution without using any cocatalysts photosensitizers. modulation active metal sites MOFs leads an increase rates from 1260 3218 µmol h −1 g . A detailed mechanism study revealed that bond defined by assisted centers is key efficiently generating photogenerated charge carriers, has appropriate affinity proton reduce barrier evolution. Besides, enhanced transport kinetics based on arrayed free carboxyl groups hydrogen‐bonded network endows higher conductivity than thus usage rate reaction kinetics.

Language: Английский

Citations

0
Boosted Hydrogen Evolution via Photoinduced Hole Transfer in Molecular‐Level Organic Heterojunction under NIR Photon Excitation DOI
Yunzhi Wang, Partha Maity, Zhongwei Liu

et al.

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 15, 2025

The energy of sunlight is predominantly concentrated in near-infrared (NIR) region, posing a paramount limitation for practical application conventional photocatalysts. Organic semiconductors can offer NIR absorption and tunable levels simultaneously through molecular engineering, which presents great potential solar-driven catalysis. However, an individual organic semiconductor typically generates Frenkel excitons with large binding energy, hindering efficient electron-hole separation. Herein, we develop molecular-level heterojunction to suppress recombination, thereby achieving boosted hydrogen (H2) evolution reaction rate 25.54 µmol h-1 (12.77 mmol g-1) under visible-near-infrared (Vis-NIR) light. Surprisingly, nanoparticles (NPs) comprising donor polymer PBDB-T matched A-D1-D2-D1-A type acceptor BTPT-IC4F exhibit promising external quantum efficiency 6.3% at 730 nm. Transient spectroscopy monitors effective extraction photogenerated holes from the highest occupied orbital (HOMO) HOMO PBDB-T, while first-principle calculations confirm prolonged lifetime excited due hole capture by phase. outstanding performance NPs light ascribed strong transfer within nanoparticle. This study provides valuable insights designing photocatalysts toward light-driven H2 other reactions.

Language: Английский

Citations

0
Odd–Even Effect in Charge Transfer Complexes through the Regulation of the Alkyl Chain DOI

Lihuan Tong,

Jie Yang, Yujie Yang

et al.

ACS Materials Letters, Journal Year: 2024, Volume and Issue: 6(7), P. 2748 - 2756

Published: June 4, 2024

Charge transfer (CT) complexes formed by donor–acceptor (D-A) pairs play a critical role in organic optoelectronic devices, where the CT effect is highly correlated with molecular packing and intermolecular interaction. There are still challenges exploring mechanisms of charge noncrystal state. Most studies regulated altering π-conjugated backbone substituents, which would lead to some uncertainties packing-property relationship. Herein, we utilized triazatruxene (TAT) different alkyls as donors 1,3,5-benzenetricarbonitrile (TCNPh) derivatives acceptors. The systems complex were constructed simply grinding mixture study arrangement transfer, an obvious odd–even could be observed. Thus, our further enriched alkyl chain regulation, allowing for more profound understanding relationship among aggregation structures, interactions, characteristics complex.

Language: Английский

Citations

3