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Optical Properties and Light-Induced Charge Transfer in Selected Aromatic C60 Fullerene Derivatives and in Their Bulk Heterojunctions with Poly(3-Hexylthiophene)

Autor
Korona, Krzysztof
Drabińska, Aneta
Kamińska, Maria
Wojtkiewicz, Jerzy
Piotrowski, Piotr
Kaim, Andrzej
Pilch, Marek
Mech, Wojciech
Krajewski, Maciej
Data publikacji
2022
Abstrakt (EN)

Fullerene derivatives offer great scope for modification of the basic molecule, often called a buckyball. In recent years, they have been the subject of numerous studies, in particular in terms of their applications, including in solar cells. Here, the properties of four recently synthesized fullerene C60 derivatives were examined regarding their optical properties and the efficiency of the charge transfer process, both in fullerene derivatives themselves and in their heterojunctions with poly (3-hexylthiophene). Optical absorption, electron spin resonance (ESR), and time-resolved photoluminescence (TRPL) techniques were applied to study the synthesized molecules. It was shown that the absorption processes in fullerene derivatives are dominated by absorption of the fullerene cage and do not significantly depend on the type of the derivative. It was also found by ESR and TRPL studies that asymmetrical, dipole-like derivatives exhibit stronger light-induced charge transfer properties than their symmetrical counterparts. The observed inhomogeneous broadening of the ESR lines indicated a large disorder of all polymer–fullerene derivative blends. The density functional theory was applied to explain the results of the optical absorption experiments.

Słowa kluczowe EN
fullerene derivatives
LESR
organic electronics
Dyscyplina PBN
nauki chemiczne
Czasopismo
Materials
Tom
15
Zeszyt
19
Strony od-do
6908
ISSN
1996-1944
Data udostępnienia w otwartym dostępie
2022-10-05
Licencja otwartego dostępu
Uznanie autorstwa