Dimerized small molecule donor enables efficient ternary organic solar cells

IF 5.4 1区 化学 Q2 CHEMISTRY, MULTIDISCIPLINARY GIANT Pub Date : 2024-07-11 DOI:10.1016/j.giant.2024.100325
Mingrui Pu , Chunxian Ke , Yongwen Lang , Heng Li , Xiangyu Shen , Leilei Tian , Feng He
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Abstract

Ternary organic solar cells (OSCs) are the feasible and efficient strategy to achieve the high-performance OSCs. It is of great significance to develop a superior third component candidate for constructing efficient ternary OSCs. In this work, we intelligently designed and synthesized a dimerized small molecule donor by connecting two asymmetric small molecule donors with the vinyl group, which is named DSMD-βV. This innovative oligomeric molecule DSMD-βV not only exhibits the complementary absorption and the cascade energy level arrangement with PM6 and BTP-eC9, but also regulates the phase separation micromorphology based on PM6:BTP-eC9. Consequently, PM6:DSMD-βV:BTP-eC9 based ternary device exhibits the improved exciton dissociation, charge transport and decreased recombination, thus achieving a superior power conversion efficiency (PCE) of 18.26 %, surpassing PM6:BTP-eC9 based binary (17.63 %). This work indicates that the dimerized small molecule donor is able to become a promising third component candidate, which also opens up a unique idea for the construction of efficient ternary organic solar cells.

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二聚化小分子供体实现高效三元有机太阳能电池
三元有机太阳能电池(OSCs)是实现高性能 OSCs 的可行且高效的策略。为构建高效的三元有机太阳能电池,开发一种优异的候选第三组分具有重要意义。在这项工作中,我们通过将两个不对称的小分子供体用乙烯基连接起来,智能地设计并合成了一种二聚小分子供体,并将其命名为 DSMD-βV。这种创新的低聚分子 DSMD-βV 不仅与 PM6 和 BTP-eC9 具有互补吸收和级联能级排列,还能在 PM6:BTP-eC9 的基础上调节相分离微形态。因此,基于 PM6:DSMD-βV:BTP-eC9 的三元器件在激子解离、电荷传输和减少重组方面均有改善,从而实现了 18.26% 的优异功率转换效率(PCE),超过了基于 PM6:BTP-eC9 的二元器件(17.63%)。这项工作表明,二聚化小分子供体能够成为一种前景广阔的候选第三组分,这也为构建高效的三元有机太阳能电池开辟了一种独特的思路。
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来源期刊
GIANT
GIANT Multiple-
CiteScore
8.50
自引率
8.60%
发文量
46
审稿时长
42 days
期刊介绍: Giant is an interdisciplinary title focusing on fundamental and applied macromolecular science spanning all chemistry, physics, biology, and materials aspects of the field in the broadest sense. Key areas covered include macromolecular chemistry, supramolecular assembly, multiscale and multifunctional materials, organic-inorganic hybrid materials, biophysics, biomimetics and surface science. Core topics range from developments in synthesis, characterisation and assembly towards creating uniformly sized precision macromolecules with tailored properties, to the design and assembly of nanostructured materials in multiple dimensions, and further to the study of smart or living designer materials with tuneable multiscale properties.
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