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

et al.

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

Published: April 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

Language: Английский

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

et al.

Materials Science and Engineering R Reports, Journal Year: 2025, Volume and Issue: 165, P. 101007 - 101007

Published: April 25, 2025

Language: Английский

Citations

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

et al.

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

Published: Feb. 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.

Language: Английский

Citations

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

et al.

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

Published: April 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

Language: Английский

Citations

0