Projects per year
Abstract
Quantum dots are of growing interest as emissive materials in light
emitting devices. Here first we report the formation of highly luminescent organic capped colloidal cadmium sulfide (CdS) nanoparticles having the highest photoluminescence quantum yield of 69% in solutions and 34% in neat thin films in the near-infrared range. Second, we also show efficient electroluminescence in the near-infrared from solution processed hybrid light emitting diodes (LEDs) based on such colloidal CdS quantum dots embedded in an organic semiconductor matrix forming a nanocomposite active layer. We also discuss the device structure and role of the doped active layer in efficiency improvement. With optimized active layer thickness and concentration of QDs, the device exhibits an external electroluminescence quantum efficiency of 0.62% at a peak emission wavelength of 760 nm, providing a route to solution processable flexible light sources for biosensors and medicine.
emitting devices. Here first we report the formation of highly luminescent organic capped colloidal cadmium sulfide (CdS) nanoparticles having the highest photoluminescence quantum yield of 69% in solutions and 34% in neat thin films in the near-infrared range. Second, we also show efficient electroluminescence in the near-infrared from solution processed hybrid light emitting diodes (LEDs) based on such colloidal CdS quantum dots embedded in an organic semiconductor matrix forming a nanocomposite active layer. We also discuss the device structure and role of the doped active layer in efficiency improvement. With optimized active layer thickness and concentration of QDs, the device exhibits an external electroluminescence quantum efficiency of 0.62% at a peak emission wavelength of 760 nm, providing a route to solution processable flexible light sources for biosensors and medicine.
Original language | English |
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Pages (from-to) | 1871-1880 |
Journal | Journal of Physical Chemistry C |
Volume | 120 |
Issue number | 3 |
Early online date | 14 Dec 2015 |
DOIs | |
Publication status | Published - 28 Jan 2016 |
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Dive into the research topics of 'Highly luminescent colloidal CdS quantum dots with efficient near-infrared electroluminescence in light-emitting diodes'. Together they form a unique fingerprint.Projects
- 2 Finished
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Challening the Limits of Photonics: stru: Challenging the Limits of Photonics: Structured Light
Dholakia, K. (PI), Krauss, T. F. (CoI) & Samuel, I. D. W. (CoI)
1/06/12 → 31/05/17
Project: Standard
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EU FP7 'LAMP' Grant Agreement-247928: EU FP7 'LAMP' (FP7-ICT-2009-4)
Samuel, I. D. W. (PI)
1/06/10 → 31/05/13
Project: Standard
Datasets
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Data underpinning - Highly Luminescent Colloidal CdS Quantum Dots with Efficient Near- Infrared Electroluminescence in Light-Emitting Diodes
Bansal, A. K. (Creator), Antolini, F. (Creator), Zhang, S. (Creator), Stroea, L. (Creator), Ortolani, L. (Creator), Lanzi, M. (Creator), Serra, E. (Creator), Allard, S. (Creator), Scherf, U. (Creator) & Samuel, I. D. W. (Creator), University of St Andrews, 2016
DOI: 10.17630/D86A2A34-29A8-4215-A8E5-296F89943360
Dataset
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