The Importance of Quantifying the Composition of the Amorphous Intermixed Phase in Organic Solar Cells

The relation of phase morphology and solid‐state microstructure with organic photovoltaic (OPV) device performance has intensely been investigated over the last twenty years. While it has been established that a combination of donor:acceptor intermixing and presence of relatively phase‐pure donor an...

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Bibliographic Details
Published in:Advanced materials (Weinheim) 2020-11, Vol.32 (47), p.e2005241-n/a
Main Authors: Marina, Sara, Kaufmann, Noëmi Petrina, Karki, Akchheta, Gutiérrez‐Meza, Elizabeth, Gutiérrez‐Fernández, Edgar, Vollbrecht, Joachim, Solano, Eduardo, Walker, Barnaby, Bannock, James H., de Mello, John, Silva, Carlos, Nguyen, Thuc‐Quyen, Cangialosi, Daniele, Stingelin, Natalie, Martín, Jaime
Format: Article
Language:English
Subjects:
Charge transport
Composition
fullerene derivatives
Fullerenes
Heat measurement
Heterojunctions
intermixing
Materials science
Morphology
organic electronics
organic solar cells
Phase separation
Photovoltaic cells
Polymers
Scanning
semiconducting polymers
Solar cells
Thickness
Thin films
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Summary:The relation of phase morphology and solid‐state microstructure with organic photovoltaic (OPV) device performance has intensely been investigated over the last twenty years. While it has been established that a combination of donor:acceptor intermixing and presence of relatively phase‐pure donor and acceptor domains is needed to get an optimum compromise between charge generation and charge transport/charge extraction, a quantitative picture of how much intermixing is needed is still lacking. This is mainly due to the difficulty in quantitatively analyzing the intermixed phase, which generally is amorphous. Here, fast scanning calorimetry, which allows measurement of device‐relevant thin films (
ISSN:0935-9648
1521-4095
DOI:10.1002/adma.202005241