Achieving 19.5% Efficiency via Modulating Electronic Properties of Peripheral Aryl‐Substituted Small‐Molecule Acceptors DOI
Tongle Xu, Guangliu Ran, Zhenghui Luo

и другие.

Small, Год журнала: 2024, Номер 20(47)

Опубликована: Авг. 15, 2024

Abstract The advancement of acceptors plays a pivotal role in determining photovoltaic performance. While previous efforts have focused on optimizing acceptor–donor–acceptor 1 –donor–acceptor (A–DA –D–A)‐typed by adjusting side chains, end groups, and conjugated extension the electron‐deficient central A unit, systematic exploration impact peripheral aryl substitutions, particularly with different electron unit its influence device performance is still lacking. In this study, three novel – QxTh, QxPh, QxPy distinct substitutions quinoxaline (Qx) are designed synthesized. Density functional theory (DFT) analyses reveal that featuring phenyl‐substituted Qx, exhibits smallest molecular binding energies tightest π···π stacking distance. Consequently, PM6:QxPh demonstrates better power conversion efficiency (PCE) 17.1% compared to blends incorporating QxTh (16.4%) (15.7%). This enhancement primarily attributed suppressed charge recombination, improved extraction, more favorable morphology. Importantly, introducing QxPh as guest acceptor into PM6:BTP‐eC9 binary system yields an outstanding PCE 19.5%, indicating substantial potential advancing ternary work provides deep insights expansion high‐performance organic materials through substitution strategy.

Язык: Английский

Optimizing interface properties of perylene-diimide-based cathode interlayer material by reducing 2-hydroxyethyl groups to achieve organic solar cells with efficiency over 19% DOI
Xiaoying Zhang, Qing Tang, Xuemei Yao

и другие.

Nano Energy, Год журнала: 2025, Номер unknown, С. 110799 - 110799

Опубликована: Фев. 1, 2025

Язык: Английский

Процитировано

1
Ti3CN MXenes-induced N-N couplings modifies perylene-diimide-based cathode interlayers for 20 % efficiency organic solar cells DOI

Yangchao Zheng,

Jingjing Zhao, Hongxiang Li

и другие.

Materials Science and Engineering R Reports, Год журнала: 2025, Номер 165, С. 101007 - 101007

Опубликована: Апрель 25, 2025

Язык: Английский

Процитировано

1
Conjugated Group Tuning of Self‐Assembled Monolayer for Efficient Hole‐Transport Layer in Organic Solar Cells DOI

Shuangjiao Gao,

Ruixiang Peng,

Yi Qiu

и другие.

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 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.

Язык: Английский

Процитировано

4
Synergistically Halogenated and Methoxylated Thiophene Additive Enables High‐Performance Organic Solar Cells DOI Open Access
Xue Jiang, Peihao Huang,

Kaihuai Tu

и другие.

Small, Год журнала: 2025, Номер unknown

Опубликована: Янв. 7, 2025

Abstract Morphology control plays a key role for improving efficiency and stability of bulk heterojunctions (BHJ) organic solar cells (OSCs). Halogenation methoxylation are two separate ways successfully adopted in additives morphology optimization. In this work, these strategies combined together. A series halogenated methoxylated thiophenes is designed synthesized as volatile to the evolution BHJ morphology. Specifically, addition 2,5‐diiodo‐3,4‐dimethoxythiophene (MT‐I) prominently improves performance photostability OSCs. Computational simulations reveal noncovalent interactions MT‐I with active layer materials that corresponds inhibition excessive aggregation behavior PM6 Y6 during film‐forming process, facilitating favorable phase separation enhanced molecular stacking. Consequently, PM6:Y6‐based binary OSCs treatment achieves high PCE 17.93%. Furthermore, demonstrates broad feasibility across diverse high‐efficiency OSCs, leading superior photovoltaic (PCE over 18%). This study offers valuable guidance design application high‐performance future endeavors.

Язык: Английский

Процитировано

0
Advancing Organic Photovoltaics: the Role of Dipole Distance and Acidity in Perylene‐Diimide Electron Transport Layers DOI Open Access
Wanqing Zhang,

Xiaoman Ding,

Jie Lv

и другие.

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 16, 2025

Abstract The electronic transport layer (ETL) based on perylene‐diimide (PDI) has been widely demonstrated for efficient organic solar cells (OSCs). However, the effect of ETL materials interfacial traps and energy losses remains understudied. This study investigates effects dipole distance PDINN interface defects using three specifically designed weak acidic with varying carboxyl hydroxyl group amounts. Among these, 3,5‐dihydroxybenzoic acid (2OH), moderate pH high distance, enhanced intermolecular forces PDINN. interaction boosted π–π stacking, ohmic contact active Ag electrode. P‐2OH film exhibited a higher more uniform potential distribution, suppressing charge recombination at interface, reducing trap density to 2.12 × 10 16 cm 3 , non‐radiative loss ∆E from 0.236 0.174 eV. Consequently, decreased 0.553 0.484 meV PM6: BTP‐ec9/P‐2OH device. Notably, decent PCE 19.1% is achieved (10 nm), it impressively power conversion efficiency (PCE) 16.4% when thickness up 50 nm. work underscores importance groups in regulating minimize offers insights developing thickness‐insensitive interlayers high‐performance OSCs.

Язык: Английский

Процитировано

0
Interface Engineering with BPhen:Cs2CO3 for High‐Performance and Stable Inverted Nonfullerene Organic Solar Cells DOI Open Access
Sujung Park, Febrian Tri Adhi Wibowo, Do Young ‍Kim

и другие.

Solar RRL, Год журнала: 2025, Номер unknown

Опубликована: Фев. 19, 2025

The widely used ZnO electron transport layer in inverted nonfullerene organic solar cells (nf‐OSCs) offers advantages such as excellent mobility and optical transparency. However, challenges arise from surface defects solution‐processed ZnO, where oxygen‐containing can penetrate the photoactive layer, leading to photocatalytic reactions with acceptors under UV light, thereby compromising device stability. Another challenge is that most recent high‐efficiency nf‐OSCs employ conventional structures, while structures exhibit comparatively lower performance. To develop stable high‐performance nf‐OSCs, interface modification essential mitigate issues enhance relatively power conversion efficiency (PCE). overcome these limitations, we introduce bathophenanthroline (BPhen) doped Cs 2 CO 3 . BPhen:Cs creates suitable energy levels, enhancing reducing charge recombination. This approach significantly improves current density fill factor, resulting a notable enhancement PCE of pristine devices 15.54% 17.09% PM6:Y6 nf‐OSCs. Furthermore, ZnO/BPhen:Cs stability, retaining ~83% their initial even after 1000 h without encapsulation, showcasing superior stability compared ZnO‐based devices.

Язык: Английский

Процитировано

0
Trifluoroacetic Acid‐Induced Adsorption Dipole Modulation of Perylene Diimide Dipole Moment Enables 19.5% Efficiency in Binary Organic Solar Cells DOI

Yangchao Zheng,

Jingjing Zhao, Song Yang

и другие.

Advanced Optical Materials, Год журнала: 2025, Номер unknown

Опубликована: Апрель 19, 2025

Abstract Perylene diimides (PDIs) have emerged as promising materials for cathode interfacial layers (CILs) in organic solar cells (OSCs) due to their advantageous energy level alignment with active layer and insensitivity film thickness, enabling the easy fabrication of efficient large‐area devices. However, inherent low dipole moment PDIs results suboptimal charge transport properties, limiting device performance. Herein, a new strategy by incorporating trifluoroacetic acid (TFA) into PDI material fabricate compound large number moments is introduced. Density functional theory calculations reveal that highly electronegative F groups attract ammonium end PDIN significantly increase from 0.3 2.6 Debye, enhancing transfer OSCs. By optimizing TFA concentration 2% using CILs, champion efficiencies 18.0% 19.5% are achieved state‐of‐the‐art binary comprising PM6:Y6 PM6:L8‐BO (Layer‐by‐Layer), respectively. Notably, these devices maintain 88.3% initial efficiency after 240 h, demonstrating exceptional operational stability. The work shows F‐induced adsorbed not only provides mechanism design but also paves way achieving high‐efficiency stable

Язык: Английский

Процитировано

0
Aggregation Optimization of Cathode Interlayer via Incorporating Cellulose Enables High-Performance Organic Solar Cells DOI

Long Wang,

Tao Li, Junying Wu

и другие.

ACS Applied Materials & Interfaces, Год журнала: 2025, Номер unknown

Опубликована: Апрель 22, 2025

Regulating aggregation and molecular packing of small-molecule cathode interlayer (CIL) materials is a significant but imperceptible issue in the development high-performance organic solar cells (OSCs). For celebrity PDINN small molecule, strong tendency perylene diimide backbone leads to excessive crystallinity when films form, ultimately affecting morphology charge transport ability films. Herein, we address this by developing hydroxyl-induced anti-aggregation strategy introducing suitable amount hydroxypropyl cellulose (HPC) into solution PDINN, careful balance achieved between film-forming quality material. Taking two commercially available active layer systems, PM6/Y6 D18/L8-BO, as examples, introduction HPC significantly increases JSC FF values devices. Therefore, power conversion efficiency risen from 17.38% 18.25% for system 18.45% 19.73% D18/L8-BO system, it was proved that thickness tolerance hybrid interface improved significantly. This has demonstrated other systems. work provides simple effective method solve problem molecule CIL materials, which conducive commercial OSCs.

Язык: Английский

Процитировано

0
Stable and Efficient Semitransparent Organic Photovoltaics Enabled by Cathode Interface Engineering DOI
Hailin Yu, Jiayu Wang, Yufei Gong

и другие.

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Май 19, 2025

Abstract Cathode interface engineering is a critical strategy for enhancing power conversion efficiency and device stability in semitransparent organic photovoltaics (STOPVs). Herein, novel approach of using trithiocyanuric acid trisodium salt (TATS) proposed to strengthen the chemical interactions between cathode interlayer (CIL) ultrathin silver (Ag) electrode. The introduction TATS not only improves conductivity CIL, but also promotes growth Ag electrodes stabilizes morphology films, thus simultaneously improving light utilization (LUE) photostability STOPVs. LUE STOPVs improved from 3.62% 3.98% after modification with TATS, further enhanced 4.30% by 35 nm molybdenum oxide as optical structure. In addition, significantly retention rate initial 53% 85%, 200 h continuous illumination. This study offers new perspective on achieving high‐efficiency through CIL strategy.

Язык: Английский

Процитировано

0
Subtly Modulating Bay Sites of Perylene Diimide Cathode Interface Layer for High‐Performance and High‐Stability Non‐Fullerene Organic Solar Cells DOI

Senmei Lan,

Dan Zhou, Lin Hu

и другие.

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Дек. 26, 2024

Abstract Cathode interface layers (CILs) are crucial for optimizing the power conversion efficiency (PCE) and stability of organic solar cells (OSCs). Two small molecule CILs, PDINN‐TS PDINN‐BS developed, by modifying bay sites perylene diimide (PDI) with thieno [3,2‐b] thiophene 2,2′‐bithiophene, separately. Due to better electron‐donating capacity longer conjugate length exhibits a stronger self‐doping effect superior compatibility compared PDINN‐TS. Consequently, in PM6: Y6 OSCs, achieved an elevated PCE 16.95%, surpassing 16.66%. Meanwhile, excellent universality. When employing BTP‐eC9 PM6:L8‐BO systems, PDINN‐BS‐based device yielded 18.02% 18.95%, outperforming 17.51% 18.38%, respectively. Furthermore, tests revealed that after being stored glovebox 1500 h, retained 90% its pristine PCE, 86% showed 80% decay (T 80 ) 150 h air, 200 at 70 °C heating N 2 , 500 under 1 sun immersion, 120, 130, 380 This demonstrates displayed complicated environment. this study provides significative guidance exploitation high‐performance high‐stability OSCs.

Язык: Английский

Процитировано

3