Two Completely Non‐Fused Ring Acceptors Working in an Alloy‐Like Model for Efficient and Stable Organic Solar Cells DOI

Chenyang Han,

Huanhuan Gao,

Yuanyuan Kan

et al.

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(17)

Published: March 13, 2024

Abstract Simple chemical structure and simplified synthesis process of active layer materials are critical for advancing the practical application organic solar cells. Herin, two completely non‐fused ring electron acceptors BTZT‐2Cl BTZT‐4Cl developed. exhibits an enhanced absorption band, increases electrostatic potential differences with D18, improves crystallinity molecular packing properties. Consequently, binary device based on displays a markedly improved efficiency 14.12%, compared to BTZT‐2Cl‐based device, which only achieves moderate 11.25%. More importantly, alloy‐like can be formed by incorporating small amount high miscibility compatibility BTZT‐2Cl. The ternary blend more compact packing, efficient exciton dissociation, extended charge carrier lifetime due formation structure. decent 15.41% superior thermal stability T 80 over 1600 h after being aged at 65 °C. These results establish it as most among devices both voltage. This study demonstrates simple material design strategy high‐performance optimization techniques, applications in OSC field.

Language: Английский

Exploiting the donor‐acceptor‐additive interaction's morphological effect on the performance of organic solar cells DOI Creative Commons
Lu Chen, Ruijie Ma, Jicheng Yi

et al.

Aggregate, Journal Year: 2023, Volume and Issue: 5(2)

Published: Nov. 6, 2023

Abstract Organic solar cells (OSCs) have demonstrated over 19% power conversion efficiency (PCE) with the help of material innovation and device optimization. Co‐working newly designed materials, traditional solvent additives, 1‐chloronaphthalene (CN), 1,8‐diodooctane (DIO) are still powerful in morphology modulation towards satisfying efficiencies. Here, we chose recently reported high‐performance polymer donors (PM6 & D18‐Fu) small molecular acceptors (Y6 L8‐BO) as active layer materials processed them by different conditions (CN or DIO none). Based on corresponding 12 groups results, their film characterizations (both ex‐situ in‐situ ones), property‐performance relationships revealed case case. It is thereby supposed to be taken a successful attempt demonstrate importance complexity donor‐acceptor‐additive interaction, since performance physics analyses also tightly combined variation. Furthermore, ternary blend construction for PCE improvement provides an approaching level showcases potential understanding‐guided‐optimization (UGO) future OSCs.

Language: Английский

Citations

24
A–D–A'–D–A type nonfused ring electron acceptors for efficient organic solar cells via synergistic molecular packing and orientation control DOI Creative Commons

Wenkui Wei,

Xia Zhou, Shuting Pang

et al.

Aggregate, Journal Year: 2024, Volume and Issue: 5(2)

Published: Jan. 4, 2024

Abstract Nonfused ring electron acceptors (NFREAs) are promising candidates for future commercialization of organic solar cells (OSCs) due to their simple synthesis. Still, the power conversion efficiencies (PCEs) NFREA‐based OSCs have large room improvement. In this work, by merging end group halogenation and side chain engineering, we developed four A–D–A'–D–A type NFREAs, which refer as EH‐4F, C4‐4F, EH‐4Cl, C4‐4Cl. Single crystal X‐ray diffraction revealed that multiple intermolecular S···F interactions between cyclopentadithiophene 5,6‐difluoro‐3‐(dicyanomethylene)indanone could cause an unfavorable dimer formation, leading ineffective π–π stackings in EH‐4F whereas no such was found EH‐4Cl C4‐4Cl after replacing with 5,6‐dichloro‐3‐(dicyanomethylene)indanone. Moreover, although shorter n ‐butyl resulted a closer molecular packing C4‐4Cl, (2‐ethylhexyl substitution) proper crystallinity exhibited enhanced face‐on orientation thin film, is favorable vertical charge transport further reducing recombination. As result, PCE 13.0% obtained EH‐4Cl‐based OSC fill factor 0.70. This work highlights importance control toward high‐performance NFREAs.

Language: Английский

Citations

16
High‐Performance Ternary Organic Solar Cells with Enhanced Luminescence Efficiency and Miscibility Enabled by Two Compatible Acceptors DOI
Cai’e Zhang, Rui Zheng, Hao Huang

et al.

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(12)

Published: Jan. 28, 2024

Abstract The ternary strategy has proven to be an effective method for improving the efficiency of organic solar cells (OSCs). However, designing and selecting third component still pose challenges. In this study, issue is addressed by focusing on PBDB‐T:Y18‐F binary system introducing a new, strong luminescent, asymmetric small‐molecule acceptor (SMA) called L8‐CBIC‐Cl, which shares similar skeleton with Y18‐F. similarity in molecular framework facilitates good compatibility between two acceptors, resulting formation alloy‐like phase. Furthermore, norbornenyl‐modified end group L8‐CBIC‐Cl contributes its luminescent properties, turn leads low non‐radiative energy loss high open‐circuit voltage. Consequently, PBDB‐T:L8‐CBIC‐Cl:Y18‐F based devices realize power conversion (PCE) up 17.01%, higher than device (14.49%). Importantly, exhibits universality as guest other three systems (D18:Y6, D18:BTP‐eC9‐4F, D18:L8‐BO). D18:L8‐BO:L8‐CBIC‐Cl shows impressive 19%. work demonstrates that employing SMA PLQY better miscibility host great potential developing high‐efficiency OSCs.

Language: Английский

Citations

15
An A–D–A′–D–A-Type Narrow Bandgap Electron Acceptor Based on Selenophene-Flanked Diketopyrrolopyrrole for Sensitive Near-Infrared Photodetection DOI

Yeye Wang,

Mingqun Yang,

Bingyan Yin

et al.

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: unknown

Published: Feb. 13, 2024

Near-infrared organic photodetectors possess great application potential in night vision, optical communication, and image sensing, but their development is limited by the lack of narrow bandgap semiconductors. A–D–A′–D–A-type molecules, featuring multiple intramolecular charge transfer effects, offer a robust framework for achieving near-infrared light absorption. Herein, we report novel electron acceptor named DPPSe-4Cl, which incorporates selenophene-flanked diketopyrrolopyrrole (Se-DPP) unit as its central A′ component. This molecule demonstrates exceptional absorption properties with an onset reaching 1120 nm low 1.11 eV, owing to strong electron-withdrawing ability quinoidal resonance effect induced Se-DPP unit. By implementing doping compensation strategy assisted Y6 reduce trap density photoactive layer, optimized photodetector based on DPPSe-4Cl exhibited efficient spectral response remarkable sensitivity range 300–1100 nm. Particularly, specific detectivity surpassing 1012 Jones wavelength 410–1030 achieved. work offers promising approach developing highly sensitive visible broadband photodetection technology using

Language: Английский

Citations

12
Two Completely Non‐Fused Ring Acceptors Working in an Alloy‐Like Model for Efficient and Stable Organic Solar Cells DOI

Chenyang Han,

Huanhuan Gao,

Yuanyuan Kan

et al.

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(17)

Published: March 13, 2024

Abstract Simple chemical structure and simplified synthesis process of active layer materials are critical for advancing the practical application organic solar cells. Herin, two completely non‐fused ring electron acceptors BTZT‐2Cl BTZT‐4Cl developed. exhibits an enhanced absorption band, increases electrostatic potential differences with D18, improves crystallinity molecular packing properties. Consequently, binary device based on displays a markedly improved efficiency 14.12%, compared to BTZT‐2Cl‐based device, which only achieves moderate 11.25%. More importantly, alloy‐like can be formed by incorporating small amount high miscibility compatibility BTZT‐2Cl. The ternary blend more compact packing, efficient exciton dissociation, extended charge carrier lifetime due formation structure. decent 15.41% superior thermal stability T 80 over 1600 h after being aged at 65 °C. These results establish it as most among devices both voltage. This study demonstrates simple material design strategy high‐performance optimization techniques, applications in OSC field.

Language: Английский

Citations

12