Dielectric additive enables humidity-independent preparation of blend morphology for high-performance, large-area organic photovoltaics

IF 38.6 1区材料科学 Q1 CHEMISTRY, PHYSICAL

Joule Pub Date : 2025-04-18 DOI:10.1016/j.joule.2025.101927

Sungmin Park, Seongwon Yoon, Hyungju Ahn, Hyeonggeun Yu, Eul-Yong Shin, Kangsik Cho, Yoon Hee Jang, Yongseok Jun, Hae Jung Son

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引用次数: 0

Abstract

Dielectric material in bulk-heterojunctions can play critical roles in exciton polarization and morphology control. We develop carvone (CV) dielectric additive to prepare high-efficiency, large-area organic photovoltaics (OPVs). CV forms a complex with L8-BO, which enhances forming uniform crystallites of acceptors as well as exciton dissociation in D18:N3:L8-BO blend. Furthermore, strong inward Marangoni flows induced by CV addition during blade coating enable the evolution of homogeneous morphology over large areas, irrespective of the surface energy of the electron-transporting layer. As a result, OPVs exhibited improved performances and, in particular, the device using binary D18:PM6 donors achieved efficiency of 17.44% for an active area of 1 cm² and the corresponding module showed 16.27% efficiency. This is among the highest OPV module efficiency achieved, with active areas above 20 cm². Importantly, it is demonstrated that CV addition is effective for reproducible preparation of the optimal blend morphology in ambient air with relative humidity from 10% to 70%.

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来源期刊

Joule Energy-General Energy

CiteScore

53.10

自引率

2.00%

发文量

198

期刊介绍： Joule is a sister journal to Cell that focuses on research, analysis, and ideas related to sustainable energy. It aims to address the global challenge of the need for more sustainable energy solutions. Joule is a forward-looking journal that bridges disciplines and scales of energy research. It connects researchers and analysts working on scientific, technical, economic, policy, and social challenges related to sustainable energy. The journal covers a wide range of energy research, from fundamental laboratory studies on energy conversion and storage to global-level analysis. Joule aims to highlight and amplify the implications, challenges, and opportunities of novel energy research for different groups in the field.