High‐Performance Organic Solar Cells Enabled by 3D Globally Aromatic Carboranyl Solid Additive DOI
Hanqiang Wang, Zhicheng Zhong, Sergio Gámez‐Valenzuela

et al.

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

Published: Nov. 18, 2024

Abstract A key factor in optimizing organic solar cells (OSCs) is the precise control of blend film morphology to enhance exciton dissociation and charge transport. Solid additives play a vital role this process, with 3D polyhedral or spherical molecules being ideal candidates due their delocalized π‐orbitals omnidirectional However, application classical fullerene derivatives as limited by synthetic complicacy poor solubility. Herein, potential globally aromatic carboranyl cages solid additives, specifically 1‐amino‐ o ‐carborane (CB‐NH 2 ) 1‐carboxy‐ (CB‐COOH), explored fine‐tune improve performance OSCs. These provide an extensive surface for hydrogen bonding interactions, which serve driving force manipulating vertical phase separation active layer crystallinity. Remarkably, CB‐NH ‐processed devices well‐tuned yield remarkable power conversion efficiency 19.48%, highlighting effectiveness on improving OSC performance. This work challenges reliance offers new insights into mechanisms can achieve high OSCs, emphasizing significance molecular engineering development next‐generation cell technology.

Language: Английский

Accomplishing High‐Performance Organic Solar Sub‐Modules (≈55 cm2) with >16% Efficiency by Controlling the Aggregation of an Engineered Non‐Fullerene Acceptor DOI Creative Commons
Thavamani Gokulnath, Hyerin Kim, Kakaraparthi Kranthiraja

et al.

Advanced Science, Journal Year: 2024, Volume and Issue: 11(31)

Published: June 18, 2024

Abstract The fabrication of environmentally benign, solvent‐processed, efficient, organic photovoltaic sub‐modules remains challenging due to the rapid aggregation current high performance non‐fullerene acceptors (NFAs). In this regard, design new NFAs capable achieving optimal in large‐area modules has not been realized. Here, an NFA named BTA‐HD‐Rh is synthesized with longer (hexyl‐decyl) side chains that exhibit good solubility and aggregation. Interestingly, integrating a minute amount (BTA‐HD‐Rh) into PM6:L8‐BO system enables improved halogen‐free solvents ( o ‐xylene:carbon disulfide O ‐XY:CS 2 )) controlled found. Then solar are fabricated at ambient condition (temperature 25 ± 3 °C humidity: 30–45%). Ultimately, champion 55 cm achieve exciting efficiency >16% solvents, which highest PCE reported for sub‐modules. Notably, doped very well correlated miscibility low Flory‐Huggins parameter (0.372), well‐defined nanoscale morphology, charge transport. This study demonstrates careful choice chain engineering offers fascinating features control overall active layer, results superior sub‐module environmental‐friendly solvents.

Language: Английский

Citations

4
Colorful and Semitransparent Organic Solar Modules via Air‐Blade Assisted Coating of Active Layers DOI
Jing‐Yuan Fan, Zhi‐Xi Liu, Hongzheng Chen

et al.

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

Published: May 12, 2025

Abstract Organic solar modules (OSMs) hold potential for building‐integrated photovoltaics, yet facing challenges to fabricate uniform and large‐area active layers over non‐halogenated solvent coating. In this work, room‐temperature air‐blade assisted (RT/A) coating is presented that helps obtaining under ambient processing. It revealed RT/A mitigates the film inhomogeneity commonly observed during hot‐substrate Different thermal gradients‐induced inhomogeneous liquid‐to‐solid transition of coating, strategy enables control time on formation via directional gas flow yield high‐quality layer blends at Large‐area from exhibit good consistency uniformity. The resultant OSMs achieve high efficiencies with certified PCE 14.5% 19.31 cm 2 area (recorded in cell efficiency tables, version 60). By further integrating Fabry–Pérot transparent electrodes, colorful semitransparent PCEs 12.80% are successfully developed. Overall, work provides a promising method scalable fabrication organic photovoltaics.

Language: Английский

Citations

0
Halogen‐free solvent processed organic solar sub‐modules (≈55 cm) with 14.70% efficiency by controlling the morphology of alkyl chain engineered polymer donor DOI Creative Commons
Thavamani Gokulnath, Hyerin Kim, Donghyun Song

et al.

EcoMat, Journal Year: 2024, Volume and Issue: 6(11)

Published: Oct. 27, 2024

Abstract Goals of high efficiency, morphological analysis, and the ability to produce organic solar cell (OSC) sub‐modules using halogen‐free solvents are demanding. In this study, a robust conjugated polymer with thienothiophene π‐spacer pendant alkyl side chain (NapBDT‐C12) was synthesized used fabricate sub‐modules. Excellent efficiencies were demonstrated by NapBDT‐C12 integrated ternary blend, which stable small‐area‐to‐sub‐module devices O ‐xylene. The efficiency added small‐area (PM6:NapBDT‐C12:L8‐BO) 18.71%. Owing controlled homogeneity blend favorable nanoscale film morphology, enhanced carrier mobilities, exciton dissociation/splitting properties, contributed OSCs. Moreover, 55 cm 2 sub‐module an 14.69% accomplished bar coating ‐xylene under ambient conditions. This study displays potential based OSC device scalable at image

Language: Английский

Citations

1
High‐Performance Organic Solar Cells Enabled by 3D Globally Aromatic Carboranyl Solid Additive DOI
Hanqiang Wang, Zhicheng Zhong, Sergio Gámez‐Valenzuela

et al.

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

Published: Nov. 18, 2024

Abstract A key factor in optimizing organic solar cells (OSCs) is the precise control of blend film morphology to enhance exciton dissociation and charge transport. Solid additives play a vital role this process, with 3D polyhedral or spherical molecules being ideal candidates due their delocalized π‐orbitals omnidirectional However, application classical fullerene derivatives as limited by synthetic complicacy poor solubility. Herein, potential globally aromatic carboranyl cages solid additives, specifically 1‐amino‐ o ‐carborane (CB‐NH 2 ) 1‐carboxy‐ (CB‐COOH), explored fine‐tune improve performance OSCs. These provide an extensive surface for hydrogen bonding interactions, which serve driving force manipulating vertical phase separation active layer crystallinity. Remarkably, CB‐NH ‐processed devices well‐tuned yield remarkable power conversion efficiency 19.48%, highlighting effectiveness on improving OSC performance. This work challenges reliance offers new insights into mechanisms can achieve high OSCs, emphasizing significance molecular engineering development next‐generation cell technology.

Language: Английский

Citations

1