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Updated: Jan 20, 2026

Concurrent Quantitative Conductivity and Mechanical Properties Measurements of Organic Photovoltaic Materials using AFM

Concurrent Quantitative Conductivity and Mechanical Properties Measurements of Organic Photovoltaic Materials using AFM

Published on: January 23, 2013

有機薄膜太陽電池の活性層モルフォロジーを二成分添加剤で制御し、高効率と安定性を達成

Hyerin Kim¹, Jin Soo Yoo¹, Donghyun Song¹

¹Department of Chemistry Education, Graduate Department of Chemical Materials, Institute for Plastic Information and Energy Materials, Sustainable Utilization of Photovoltaic Energy Research Center (ERC), Pusan National University, Busandaehakro 63-2, Busan 46241, Republic of Korea.

|January 19, 2026

Abstract:

External single additives have played a key role in achieving high-performance organic solar cells (OSCs) by regulating the active layer morphology. Herein, we added a binary additive (naphthalene + 1-iodonaphthalene) to the PM6:L8-BO active layer. Interestingly, the binary additive simultaneously enhanced current-density (J _sc) and fill factor (FF) to realize state-of-the art power conversion efficiency (PCE) of 18.57%, compared to a pristine device PCE (17.25%). This enhancement in performance is predominantly ascribed to (1) improved photoactive material solubility; (2) balanced mobility; and (3) optimized nanoscale morphology. In addition to the high efficiency of the binary additive-based PM6:L8-BO OSCs, these devices exhibited remarkable long-term stability, retaining up to 97% of their initial performance over 120 days under ambient conditions (temperature at 25 ± 4 °C and humidity: 35-45%). Additionally, we fabricated organic photodetectors (OPDs) containing binary additives. The PM6:L8-BO based OPD produced exhibited excellent quantum efficiency with responsivity and detectivity values of 0.62 A W^- ¹ and 2.10 × 10¹⁰ Jones, respectively. Overall, our work highlights the benefits of utilizing binary additive-based active layers in OSCs and OPDs to produce high performance without compromising long-term device stability.

キーワード:

有機薄膜太陽電池二成分添加剤活性層モルフォロジー電力変換効率安定性有機フォト検出器

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