Emissive and charge-generating donor–acceptor interfaces for organic optoelectronics with low voltage losses View Full Text


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Article Info

DATE

2019-04-01

AUTHORS

Sascha Ullbrich, Johannes Benduhn, Xiangkun Jia, Vasileios C. Nikolis, Kristofer Tvingstedt, Fortunato Piersimoni, Steffen Roland, Yuan Liu, Jinhan Wu, Axel Fischer, Dieter Neher, Sebastian Reineke, Donato Spoltore, Koen Vandewal

ABSTRACT

Intermolecular charge-transfer states at the interface between electron donating (D) and accepting (A) materials are crucial for the operation of organic solar cells but can also be exploited for organic light-emitting diodes1,2. Non-radiative charge-transfer state decay is dominant in state-of-the-art D-A-based organic solar cells and is responsible for large voltage losses and relatively low power-conversion efficiencies as well as electroluminescence external quantum yields in the 0.01-0.0001% range3,4. In contrast, the electroluminescence external quantum yield reaches up to 16% in D-A-based organic light-emitting diodes5-7. Here, we show that proper control of charge-transfer state properties allows simultaneous occurrence of a high photovoltaic and emission quantum yield within a single, visible-light-emitting D-A system. This leads to ultralow-emission turn-on voltages as well as significantly reduced voltage losses upon solar illumination. These results unify the description of the electro-optical properties of charge-transfer states in organic optoelectronic devices and foster the use of organic D-A blends in energy conversion applications involving visible and ultraviolet photons8-11. More... »

PAGES

1-6

References to SciGraph publications

Identifiers

URI

http://scigraph.springernature.com/pub.10.1038/s41563-019-0324-5

DOI

http://dx.doi.org/10.1038/s41563-019-0324-5

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1113159657

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/30936478


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