journal article·2024-10

Achieving 19.78%‐Efficiency Organic Solar Cells by 2D/1A Ternary Blend Strategy with Reduced Non‐Radiative Energy Loss

Xiaolin Jiang, Xiaodong Wang, Yifan Wang, Guangliu Ran, Wenlong Liu, Hao Lu, Hongxiang Li, Nan Wei, Zhengdong Wei, Yi Lin, Zaifei Ma, Yahui Liu, Wenkai Zhang, Xinjun Xu, Zhishan Bo

Advanced Functional Materials· Volume 34· Issue 44
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Abstract

Abstract Reducing non‐radiative energy loss (∆Enr) is critical for enhancing the photovoltaic performance of organic solar cells (OSCs). To achieve this, a small molecular donor, LJ1, is introduced as the third component in the host system D: A system (D18: BTP‐eC9‐4F). The cascade‐like energy level alignment of D18, LJ1, and BTP‐eC9‐4F facilitates efficient charge transfer. LJ1's good solubility in the processing solvent and high miscibility with BTP‐eC9‐4F delay the precipitation of BTP‐eC9‐4F, leading to improved phase morphology in blend films. Additionally, LJ1 increases spacing between the polymer donor (PD) and the small molecule acceptor (SMA), optimizing blend film morphology and reducing non‐radiative energy loss in OSCs. Ternary OSCs based on D18:LJ1:BTP‐eC9‐4F achieve a power conversion efficiency (PCE) of 19.43% with reduced ∆Enr. Notably, the ternary device using D18:LJ1:L8‐BO attains an outstanding PCE of 19.78%, which is one of the highest device efficiency for ternary OSC. The work highlights the effectiveness of the ternary blend strategy in enhancing OSC performance while minimizing ∆Enr.
Source: crossref · Quality: baseline

Research context

OpenAlex topics: Organic Electronics and Photovoltaics · Thin-Film Transistor Technologies · Perovskite Materials and Applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

College of Materials Science and Engineering Qingdao University Qingdao 266071 P. R. China

College of Textiles & Clothing State Key Laboratory of Bio‐fibers and Eco‐textiles Qingdao University Qingdao 266071 P. R. China

Department of Physics and Applied Optics Beijing Area Major Laboratory Beijing Normal University Beijing 100875 P. R. China

Beijing Key Laboratory of Energy Conversion and Storage Materials College of Chemistry Beijing Normal University Beijing 100875 P. R. China

State Key Laboratory of Polymer Materials Engineering College of Polymer Science and Engineering Sichuan University Chengdu 610065 P. R. China

Center for Advanced Low‐Dimension Materials State Key Laboratory for Modification of Chemical Materials College of Materials Science and Engineering Donghua University Shanghai 201620 P. R. China

Funding

National Natural Science Foundation of China · Qingdao University · Innovative Research Group Project of the National Natural Science Foundation of China · Natural Science Foundation of Shandong Province

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