Photocurrent-detected 2D electronic spectroscopy reveals ultrafast hole transfer in operating PM6/Y6 organic solar cells
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10.1021/acs.jpclett.1c00822
Inclou dades d'ús des de 2022
Cita com:
hdl:2117/366043
Tipus de documentArticle
Data publicació2021-04-29
Condicions d'accésAccés obert
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continguts d'aquesta obra estan subjectes a la llicència de Creative Commons
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Reconeixement-NoComercial-SenseObraDerivada 3.0 Espanya
ProjecteLightNet - LightNet (EC-H2020-670949)
ICFOstepstone - ICFOstepstone PhD Programme for Early-Stage Researchers in Photonics (EC-H2020-713729)
LICROX - Light assisted solar fuel production by artificial CO2 Reduction and water Oxidation (EC-H2020-951843)
COPAC - Coherent Optical Parallel Computing (EC-H2020-766563)
ICFOstepstone - ICFOstepstone PhD Programme for Early-Stage Researchers in Photonics (EC-H2020-713729)
LICROX - Light assisted solar fuel production by artificial CO2 Reduction and water Oxidation (EC-H2020-951843)
COPAC - Coherent Optical Parallel Computing (EC-H2020-766563)
Abstract
The performance of nonfullerene-acceptor-(NFA)-based organic solar cells is
rapidly approaching the efficiency of inorganic cells. The chemical versatility of NFAs extends
the light-harvesting range to the infrared, while preserving a considerably high open-circuit-
voltage, crucial to achieve power-conversion efficiencies >17%. Such low voltage losses in the
charge separation process have been attributed to a low-driving-force and efficient exciton
dissociation. Here, we address the nature of the subpicosecond dynamics of electron/hole
transfer in PM6/Y6 solar cells. While previous reports focused on active layers only, we
developed a photocurrent-detected two-dimensional spectroscopy to follow the charge transfer
in fully operating devices. Our measurements reveal an efficient hole-transfer from the Y6-
acceptor to the PM6-donor on the subpicosecond time scale. On the contrary, at the same
time scale, no electron-transfer is seen from the donor to the acceptor. These findings, putting
ultrafast spectroscopy in action on operating optoelectronic devices, provide insight for further
enhancing NFA solar cell performance.
CitacióBolzonello, L. [et al.]. Photocurrent-detected 2D electronic spectroscopy reveals ultrafast hole transfer in operating PM6/Y6 organic solar cells. "Journal of Physical Chemistry Letters", 29 Abril 2021, vol. 12, p. 3983-3988.
ISSN1948-7185
Versió de l'editorhttps://pubs.acs.org/doi/10.1021/acs.jpclett.1c00822
Altres identificadorshttps://pubmed.ncbi.nlm.nih.gov/33877838/
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Photocurrent detected 2D.pdf | 2,483Mb | Visualitza/Obre |