Direct white light emission from carbon nanodots (C-dots) in solution processed light emitting diodes

We describe the preparation of inverted white light emitting diodes by solution processing. The active layer is formed uniquely by Carbon Nanodots (C-dots) that display white-light emission at voltage close to 5 V when combined with metal oxides as charge transport layers. Moreover, we have demonstr...

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Bibliographic Details
Published inNanoscale Vol. 11; no. 23; pp. 11315 - 11321
Main Authors Paulo-Mirasol, Sofia, Martínez-Ferrero, Eugenia, Palomares, Emilio
Format Journal Article
LanguageEnglish
Published England Royal Society of Chemistry 21.06.2019
Subjects
Carbon
Charge transfer
Charge transport
Light emission
Light emitting diodes
Organic light emitting diodes
Pictures
White light
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Summary:We describe the preparation of inverted white light emitting diodes by solution processing. The active layer is formed uniquely by Carbon Nanodots (C-dots) that display white-light emission at voltage close to 5 V when combined with metal oxides as charge transport layers. Moreover, we have demonstrated that the white light is not the product of charge transfer between the polymer selective contact and the C-dots but the result of the different recombination processes within the C-dots. C-Dots are the only component of the electroactive layer in solution processed LEDs and the only source of the white light.
Bibliography:Electronic supplementary information (ESI) available: TEM, FT-IR, cyclic voltammetry of C-dots in solution, TCSPC decays and AFM pictures of the layers of C-dots. See DOI
10.1039/c9nr02268f
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ISSN:2040-3364
2040-3372
DOI:10.1039/c9nr02268f