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Singlet Fission Dynamics of Colloidal Nanoparticles of a Perylenediimide Derivative in Solutions
The Journal of Physical Chemistry B ( IF 2.8 ) Pub Date : 2021-06-15 , DOI: 10.1021/acs.jpcb.1c03285
Youngseo Kim 1 , Minhi Han 1 , Chiho Lee 1 , Sungnam Park 1
The Journal of Physical Chemistry B ( IF 2.8 ) Pub Date : 2021-06-15 , DOI: 10.1021/acs.jpcb.1c03285
Youngseo Kim 1 , Minhi Han 1 , Chiho Lee 1 , Sungnam Park 1
Affiliation
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Singlet fission (SF) is an intriguing process in which a singlet exciton produces two triplet excitons in molecular aggregates. Perylenediimide (PDI) derivatives are promising materials for SF-based photovoltaics, and the SF process in PDI aggregates is important to investigate for their applications. In this work, we studied the entire SF process occurring in the colloidal nanoparticles of a PDI derivative in solutions by using time-resolved fluorescence and transient absorption (TA) experiments. PE–PDI was found to form the colloidal nanoparticles of H- and J-aggregates in polar solvents. The TA signals of PE–PDI aggregates in solutions were selectively measured by wavelength-dependent excitation. The TA signals were analyzed by using a global fitting analysis, and all kinetic parameters involved in the entire SF process were determined. Our current investigation has confirmed that fast SF occurs on the surface of the colloidal nanoparticles of PDI aggregates via the charge transfer mediated mechanism, giving a high quantum yield of triplet excitons.
中文翻译:
溶液中苝二酰亚胺衍生物胶体纳米粒子的单线态裂变动力学
单线态裂变 (SF) 是一个有趣的过程,其中一个单线态激子在分子聚集体中产生两个三线态激子。苝二亚胺 (PDI) 衍生物是用于 SF 基光伏的有前途的材料,PDI 聚集体中的 SF 过程对于研究它们的应用很重要。在这项工作中,我们通过使用时间分辨荧光和瞬态吸收 (TA) 实验研究了溶液中 PDI 衍生物的胶体纳米粒子中发生的整个 SF 过程。发现 PE-PDI 在极性溶剂中形成 H-和 J-聚集体的胶体纳米粒子。溶液中 PE-PDI 聚集体的 TA 信号通过波长相关激发选择性地测量。使用全局拟合分析对TA信号进行分析,并确定了整个SF过程中涉及的所有动力学参数。
更新日期:2021-07-29
中文翻译:
![](https://scdn.x-mol.com/jcss/images/paperTranslation.png)
溶液中苝二酰亚胺衍生物胶体纳米粒子的单线态裂变动力学
单线态裂变 (SF) 是一个有趣的过程,其中一个单线态激子在分子聚集体中产生两个三线态激子。苝二亚胺 (PDI) 衍生物是用于 SF 基光伏的有前途的材料,PDI 聚集体中的 SF 过程对于研究它们的应用很重要。在这项工作中,我们通过使用时间分辨荧光和瞬态吸收 (TA) 实验研究了溶液中 PDI 衍生物的胶体纳米粒子中发生的整个 SF 过程。发现 PE-PDI 在极性溶剂中形成 H-和 J-聚集体的胶体纳米粒子。溶液中 PE-PDI 聚集体的 TA 信号通过波长相关激发选择性地测量。使用全局拟合分析对TA信号进行分析,并确定了整个SF过程中涉及的所有动力学参数。