Journal
NATURE NANOTECHNOLOGY
Volume 14, Issue 4, Pages 347-353Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/s41565-019-0370-9
Keywords
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Funding
- European Commission through the Marie Sklodowska-Curie ITN project iSwitch [GA-642196]
- Marie Sklodowska-Curie ITN project SYNCHRONICS [GA-643238]
- ERC project SUPRAFUNCTION [GA-257305]
- ERC project LIGHT4FUNCTION [GA-308117]
- Agence Nationale de la Recherche through the Labex project CSC within the Investissement d'Avenir programme [ANR-10-LABX-0026 CSC, ANR-10-120 IDEX-0002-02]
- International Center for Frontier Research in Chemistry (icFRC)
- German Research Foundation [SFB 765, SFB 951]
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Organic light-emitting transistors are pivotal components for emerging opto- and nanoelectronics applications, such as logic circuitries and smart displays. Within this technology sector, the integration of multiple functionalities in a single electronic device remains the key challenge. Here we show optically switchable organic light-emitting transistors fabricated through a judicious combination of light-emitting semiconductors and photochromic molecules. Irradiation of the solution-processed films at selected wavelengths enables the efficient and reversible tuning of charge transport and electroluminescence simultaneously, with a high degree of modulation (on/off ratios up to 500) in the three primary colours. Different emitting patterns can be written and erased through a non-invasive and mask-free process, on a length scale of a few micrometres in a single device, thereby rendering this technology potentially promising for optically gated highly integrated full-colour displays and active optical memory.
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