Enabling High‐Efficiency and Stable Binary Organic Solar Cells by Solid Additive‐Assisted Morphology Modulation DOI Open Access

Yetai Cheng,

Hongxiang Li, Xinfei Zhang

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 30, 2024

Abstract The solid additive strategy represents a simple yet effective approach to achieving high‐efficiency organic solar cells (OSCs) by enhancing the morphology of active layer. In this study, highly volatile additive, 2,4,6‐trichloro‐1,3,5‐triazine (TCT), is employed modulate morphology. Unlike other additives previously reported, TCT exhibits remarkable intermolecular interactions with both polymer donor and acceptor, offering two distinct advantages. Firstly, notably enhances crystallinity molecular order blend film, subtly optimizing fiber network structure within, thereby facilitating carrier transport significantly improving mobility film. Secondly, stabilizes bi‐continuous fibrous mitigating morphological evolution layer device stability. Consequently, D18:L8‐BO:TCT higher power conversion efficiency 19.50% compared D18:L8‐BO (18.13%). Furthermore, after 960 h storage, OSC treated retains 90% its initial PCE, outperforming (73%). This study presents promising avenue for high‐performance OSCs through manipulating additives.

Language: Английский

Functionalized π-Bridges in Dimerized Acceptors Enable High-Performance Organic Solar Cells DOI
Xiangyu Shen,

Waqar Ali Memon,

Hanjian Lai

et al.

Nano Energy, Journal Year: 2025, Volume and Issue: unknown, P. 111085 - 111085

Published: May 1, 2025

Language: Английский

Citations

0
Precisely Regulating Intermolecular Interactions and Molecular Packing of Nonfused‐Ring Electron Acceptors via Halogen Transposition for High‐Performance Organic Solar Cells DOI
Xiaobin Gu, Rui Zeng, Yuqi Hou

et al.

Angewandte Chemie, Journal Year: 2024, Volume and Issue: 136(34)

Published: June 5, 2024

Abstract The structure of molecular aggregates is crucial for charge transport and photovoltaic performance in organic solar cells (OSCs). Herein, the intermolecular interactions aggregated structures nonfused‐ring electron acceptors (NFREAs) are precisely regulated through a halogen transposition strategy, resulting noteworthy transformation from 2D‐layered to 3D‐interconnected packing network. Based on 3D pathway, binary ternary devices deliver outstanding power conversion efficiencies (PCEs) 17.46 % 18.24 %, respectively, marking highest value NFREA‐based OSCs.

Language: Английский

Citations

3
Jamming Giant Molecules at Interface in Organic Photovoltaics to Improve Performance and Stability DOI
Ming Zhang,

Zaiyu Wang,

Lei Zhu

et al.

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(52)

Published: Oct. 7, 2024

A novel approach for depositing the giant molecule acceptor (GMA) at donor-acceptor interface to enhance efficiency and stability of organic photovoltaic (OPV) devices through a designed interface-enhanced layer-by-layer device fabrication protocol is proposed. The DQx-Ph mixed with polymer donor in bottom layer form fibril phase phase, followed by subsequent deposition main L8-BO. L8-BO solution swells alters localized morphology mixing introducing fibrillar crystallization pushing molecules outwards interfaces. Through this approach, optoelectronic property bulk heterojunction are optimized. This configuration maintains superior transport properties while integrating high open-circuit voltage characteristics DQx-Ph. Additionally, exciton dissociation charge generation simultaneously enhanced, suppressed energy losses. power conversion 19.9% improved operational achieved, underscoring importance GMA jamming advancing OPV technology. study provides new insights into development ancillary materials overcome critical limitations OPV, revealing innovative approaches technologies.

Language: Английский

Citations

3
Minimizing Interfacial Energy Losses with Carbon Dot Bifacial Modification Layers for High‐Efficiency and Stable Perovskite LEDs DOI Open Access
Zhibin Wang,

Song Zheng,

Naizhong Jiang

et al.

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

Published: Feb. 16, 2025

Abstract Perovskite light‐emitting diodes (PeLEDs) have reached near‐unity photoluminescent quantum yields (PLQYs), but further improvements in electroluminescent efficiency are constrained by interfacial energy losses between the emissive layer and charge transport layers. In this study, multifunctional carbon dot organic frameworks (CDOFs) introduced as a dual‐interface modification material for perovskite layer. This approach effectively passivates both upper buried interfaces, boosting PLQY to nearly 100% enabling an external of 28.0%. The CDOFs also facilitate balanced injection, achieving low turn‐on voltage only 1.9 V, significantly below bandgap voltage. Additionally, exceptional defect passivation imparted bolsters structural stability, T 50 operational lifetime 81.7 min at initial ultrahigh luminance 10 000 cd m −2 , with no detectable Joule heating. study underscores potential advancing PeLED performance.

Language: Английский

Citations

0
Acceptor Crystallinity Engineering Enables >20% Efficiency Binary Organic Solar Cells with 83.0% Fill Factor DOI

Jiawei Deng,

Wenhao Li, Rui Zeng

et al.

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

Published: April 7, 2025

Abstract For spontaneously crystallized organic photovoltaic materials, morphology optimization remains a challenge due to the disparity in crystallinity between donor and acceptor components. Imperfections crystalline phases result significant trap‐assisted recombination, which emerges as critical factor limiting fill (FF) of solar cells (OSCs). Herein, method is introduced for precise regulation crystallinity, utilizing novel upper‐layer processing solvent, trichloroethylene (TCE), improve state vertical active layer. The TCE solvent synergistically optimizes intermolecular interactions among molecules balances film‐forming process, thereby increasing proportion transport forming high‐speed channels electron transport, subsequently reduces charge recombination. As result, efficiency binary reaches 20.05%. More importantly, an unprecedented FF 83.0% obtained, representing highest value OSCs. This facile effective approach offers promising means constructing efficient networks fabricating high‐efficiency morphologically stable

Language: Английский

Citations

0
Dimeric Acceptors Using Different Central Linkers to Manipulate Electronic and Morphological Properties DOI
Senke Tan, Rui Zeng,

Jiawei Deng

et al.

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 1, 2024

Abstract Dimerized acceptors show promise in combining the high performance of small‐molecule non‐fullerene (NFAs) with excellent stability polymer acceptors. The central linking units that connect two acceptor molecules together have a profound impact on dimeric properties and structure‐performance relationships blended thin films. It is seen different linkers significantly affect electronic morphology film. electron‐donating linker elevates absorption coefficient, affords lower bandgap, reduces energy loss, thus better photovoltaic device performance. Better fibrillar can be obtained. best material DY‐EDOT‐based shows power conversion efficiency (PCE) 18.21%, an open‐circuit voltage ( V oc ) 0.924 V, short‐circuit current density J sc 25.20 mA cm −2 , fill factor (FF) 78.19%, which among highest value for dimerized This study reveals fundamental importance determining provides useful strategies developing oligomeric polymeric acceptors, critical simultaneously improving organic solar cells (OSCs).

Language: Английский

Citations

2
Delicate Regulation of Central Substituents Boosts Organic Photovoltaic Performance of Dimeric Acceptors DOI

Xinyuan Jia,

Yu Li,

Xiangjian Cao

et al.

Small, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 3, 2024

Abstract Dimeric acceptors are expected to satisfy both excellent power conversion efficiency (PCE) and operational stability of organic solar cells (OSCs). However, comparing highly planar symmetrical monomer‐like acceptors, the quite different steric/spatial configurations dimeric affect device outcomes greatly. Herein, on basis same molecular platform that constructed by bridging central units two acceptor, diverse substituents (─OCH 3 for D1, ─CH D2, ─CF D3) grafted regulate three dimensions (3D) geometries delicately. A systematic investigation reveals substituent‐dependent variation energy level, absorption, packing behavior. Consequently, D2 characteristic more favorable configuration, affords a superior film morphology charge transfer/transport dynamics in resulting OSCs, thus yielding an PCE 17.50% along with good long‐term stability. This work manifests crucially important role constructing high‐performance acceptors.

Language: Английский

Citations

1
As-cast organic solar cells with 19.44% efficiency enabled by introducing functional fullerene derivative to facilitate charge carrier generation and transport DOI

Zhihui Lin,

Qi Ai,

Xiangxi Wu

et al.

Science China Chemistry, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 19, 2024

Language: Английский

Citations

1
Suppressing Exciton–Vibration Coupling via Intramolecular Noncovalent Interactions for Low‐Energy‐Loss Organic Solar Cells DOI
Xiaobin Gu, Yanan Wei, Rui Zeng

et al.

Angewandte Chemie, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 3, 2024

Abstract 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 (Δ E nr ) 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 Δ 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

1
A Low‐Cost 3D Spirobifluorene‐Based Acceptor for High‐Performance Ternary Organic Solar Cells DOI
Chunyan Liu, Nailiang Qiu, Haonan Liu

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 2, 2024

Abstract The advantages of 3D materials as guest components ternary organic solar cells (TOSCs) are being realized, showing great potential in improving device performance. However, the correlation between their distinctive structure and performance remains largely unexplored. Herein, a acceptor named SF‐HR is cost‐effectively synthesized utilizing twisted spirofluorene core. shows an edge‐on oriented packing but not disordered aggregation other molecules. When introduced into D18:Y6 binary system, can induce more predominant face‐on finer domain size blend, which facilitates exciton dissociation multi‐direction charge transport. Besides, exhibits complementary absorption cascaded energy levels with D18 Y6, contributing to improvement short‐circuit current density ( J sc ) open‐circuit voltage V oc ), respectively. Accordingly, optimized achieves higher 0.893 V, 27.13 mA cm −2 , fill factor (FF) 77.8%, respectively, than that host device, yielding excellent efficiency 18.85%. This success demonstrates utilization crystalline material component represents promising strategy for achieving state‐of‐the‐art OSCs, conducive understanding relationship from new perspective.

Language: Английский

Citations

0