The High-performance Organic Solar Cells with an Improved Efficiency and Stability by Incorporating Environmental Biomaterial Astaxanthin
The High-performance Organic Solar Cells with an Improved Efficiency and Stability by Incorporating Environmental Biomaterial Astaxanthin
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DOI：
10.1016/j.electacta.2022.141684
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发表时间：
2022-12
影响因子：
6.6
通讯作者：
Jinzhen Huang;Huangzhong Yu
中科院分区：
文献类型：
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作者：
Jinzhen Huang;Huangzhong Yu
生物材料是一种新型的光电材料，具有许多优点。利用生物材料调节有机太阳能电池有源层的光电性能是制备高性能有机太阳能电池的一种新策略。在本工作中，我们首次将环境友好、无污染的生物材料虾青素(AST)添加到PBDB-T：ITIC二元体系中，制备了高效的三元OSCs。结果表明，AST的加入不仅可以提高PBDB-T和ITIC的结晶度、有源层的吸收强度和电荷转移，而且可以延长激子在OSCs中的寿命和扩散长度。此外，能量供体AST和能量受体PBDB-T之间存在Förster共振能量转移(FRET)，促进激子的产生。因此，添加0.1wt%AST后，PBDB-T：ITIC体系的三元OSCs的功率转换效率(PCE)从10.27%明显提高到12.07%。此外，由于其稳定的形貌和结晶，三元OSCs显示出更高的器件存储稳定性。本工作表明，清洁无污染的生物材料AST可以有效地提高OSCs的性能，为开发高效、稳定的环境友好型OSCs铺平了道路。
Biomaterials are a new kind of photoelectric materials, which have many advantages. Using biomaterials to adjust the photoelectric properties of active layer in organic solar cells (OSCs) is a new strategy for the preparation of high-performance OSCs. In this work, we add environment-friendly and pollution-free biomaterial astaxanthin (AST) into binary PBDB-T:ITIC system to fabricate the high-efficiency ternary OSCs for the first time. The result show that the addition of AST can not only enhance the crystallization of PBDB-T and ITIC, the absorption intensity of active layer and charge transfer, but also prolong the lifetime and diffusion length of exciton in OSCs. Moreover, there exists the Förster resonant energy transfer (FRET) between energy donor AST and the energy accepter (PBDB-T), which promotes the generation of excitons. Therefore, by adding 0.1 wt% AST, the power conversion efficiency (PCE) of ternary OSCs is obviously increased from 10.27% to 12.07% for PBDB-T:ITIC system. In addition, the ternary OSCs shows higher device storage stability due to its stable morphology and crystallization. This work shows that the clean and pollution-free biomaterial AST can effectively improve the performance of OSCs, which paves the way for the development of environmentally friendly OSCs with high efficiency and stability.