Symmetry breaking charge transfer behaviour in D-A-D triad system by selective excitation
Journal of Molecular Structure, ISSN: 0022-2860, Vol: 1301, Page: 137338
2024
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Article Description
Multichromophoric D-A-D triads synthesized using perylenediimde (PDI) bonded with naphthalenediimide (NDI) units via aliphatic (Triad 1 ) or aromatic (Triad 2 ) linker is studied for symmetry breaking charge separation (SB-CS) by selective excitation of the NDI/PDI chromophores. NDI chromophore on excitation transfers electron to PDI chromophore and type of linker played crucial role in stability of generated CS state. Photoluminescence, time resolved fluorescense and transient absorption spectroscopy tools have been used to study the phenomenon. The optical as well as electrochemical study confirmed intramolecular electron transfer from NDI to PDI chromophore. Stable SB-CS state formation is directly resulted in increased open circuit voltage (V oc ) of Triad 2 based organic solar cell devices. The selective excitation of chromophoric center and SB-CS in D-A-D type triad is the demand of present electronic device for the formation of long lived charge carrier.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S0022286023024262; http://dx.doi.org/10.1016/j.molstruc.2023.137338; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85181060232&origin=inward; https://linkinghub.elsevier.com/retrieve/pii/S0022286023024262; https://dx.doi.org/10.1016/j.molstruc.2023.137338
Elsevier BV
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