山东第二医科大学基础医学院郝晓涛团队揭示了弱吸收成分促进室内有机光伏激子解离。相关论文于2025年2月19日发表于国际顶尖学术期刊《中国化学》杂志上。

在这项工作中，研究组研究了弱吸收第三组分在增强激子解离和改善室内OPV性能中的作用。通过将eC9-2Cl引入到D18-Cl:F-BTA3二元体系中，研究人员创建了一种三元混合物，该混合物显示出器件效率的显着提高。瞬态吸收光谱和时间分辨光致发光测量表明，eC9-2Cl促进了有效的能量转移和激子解离。在室内照明条件下，eC9-2Cl作为弱吸收第三组分，三元器件的功率转换效率从24.7%提高到26.2%。这些发现突出了弱吸收组分在优化能量传递过程和克服OPV系统室内光收集限制方面的潜力。

据悉，室内有机光伏（OPV）电池已经成为从人造光源中收集能量的有希望的候选者。然而，室内光源有限的光谱范围和低光子通量限制了这些器件的光电流和功率输出。

附：英文原文

Title: Weak Absorptive Component Boosts Exciton Dissociation in Indoor Organic Photovoltaics

Author: Zhenchuan Wen, Jiawei Qiao, Yuying Yang, Xiaotao Hao

Issue&Volume: 2025-02-19

Abstract: Indoor organic photovoltaic (OPV) cells have emerged as promising candidates for harvesting energy from artificial light sources. However, the limited spectral range and low photon flux of indoor light sources restrict the photocurrent and power output of these devices. In this work, we investigate the role of a weak absorptive third component in enhancing exciton dissociation and improving indoor OPV performance. By introducing eC9-2Cl into a D18-Cl:F-BTA3 binary system, we create a ternary blend that demonstrates significant improvements in device efficiency. Transient absorption spectroscopy and time-resolved photoluminescence measurements reveal that eC9-2Cl facilitates efficient energy transfer and exciton dissociation. Under indoor lighting conditions, where eC9-2Cl acts as a weak absorptive third component, the ternary devices exhibit a power conversion efficiency increase from 24.7% to 26.2%. These findings highlight the potential of weak absorptive components in optimizing energy transfer processes and overcoming the limitations of indoor light harvesting in OPV systems.

DOI: 10.1002/cjoc.202401167

Source: https://onlinelibrary.wiley.com/doi/full/10.1002/cjoc.202401167