Bright high-colour-purity deep-blue carbon dot light-emitting diodes via efficient edge amination

Fanglong Yuan; Ya Kun Wang; Geetu Sharma; Yitong Dong; Xiaopeng Zheng; Peicheng Li; Andrew Johnston; Golam Bappi; James Z. Fan; Hao Kung; Bin Chen; Makhsud I. Saidaminov; Kamalpreet Singh; Oleksandr Voznyy; Osman M. Bakr; Zheng Hong Lu; Edward H. Sargent

doi:10.1038/s41566-019-0557-5

Bright high-colour-purity deep-blue carbon dot light-emitting diodes via efficient edge amination

Fanglong Yuan, Ya Kun Wang, Geetu Sharma, Yitong Dong, Xiaopeng Zheng, Peicheng Li, Andrew Johnston, Golam Bappi, James Z. Fan, Hao Kung, Bin Chen, Makhsud I. Saidaminov, Kamalpreet Singh, Oleksandr Voznyy, Osman M. Bakr, Zheng Hong Lu^*, Edward H. Sargent

^*Corresponding author for this work

Chemistry

Research output: Contribution to journal › Article › peer-review

269 Scopus citations

Abstract

Deep-blue light-emitting diodes (LEDs) (emitting at wavelengths of less than 450 nm) are important for solid-state lighting, vivid displays and high-density information storage. Colloidal quantum dots, typically based on heavy metals such as cadmium and lead, are promising candidates for deep-blue LEDs, but these have so far had external quantum efficiencies lower than 1.7%. Here we present deep-blue light-emitting materials and devices based on carbon dots. The carbon dots produce emission with a narrow full-width at half-maximum (about 35 nm) with high photoluminescence quantum yield (70% ± 10%) and a colour coordinate (0.15, 0.05) closely approaching the standard colour Rec. 2020 (0.131, 0.046) specification. Structural and optical characterization, together with computational studies, reveal that amine-based passivation accounts for the efficient and high-colour-purity emission. Deep-blue LEDs based on these carbon dots display high performance with a maximum luminance of 5,240 cd m⁻² and an external quantum efficiency of 4%, notably exceeding that of previously reported quantum-tuned solution-processed deep-blue LEDs.

Original language	English (US)
Pages (from-to)	171-176
Number of pages	6
Journal	Nature Photonics
Volume	14
Issue number	3
DOIs	https://doi.org/10.1038/s41566-019-0557-5
State	Published - Mar 1 2020

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics

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Yuan, F., Wang, Y. K., Sharma, G., Dong, Y., Zheng, X., Li, P., Johnston, A., Bappi, G., Fan, J. Z., Kung, H., Chen, B., Saidaminov, M. I., Singh, K., Voznyy, O., Bakr, O. M., Lu, Z. H., & Sargent, E. H. (2020). Bright high-colour-purity deep-blue carbon dot light-emitting diodes via efficient edge amination. Nature Photonics, 14(3), 171-176. https://doi.org/10.1038/s41566-019-0557-5

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title = "Bright high-colour-purity deep-blue carbon dot light-emitting diodes via efficient edge amination",

abstract = "Deep-blue light-emitting diodes (LEDs) (emitting at wavelengths of less than 450 nm) are important for solid-state lighting, vivid displays and high-density information storage. Colloidal quantum dots, typically based on heavy metals such as cadmium and lead, are promising candidates for deep-blue LEDs, but these have so far had external quantum efficiencies lower than 1.7%. Here we present deep-blue light-emitting materials and devices based on carbon dots. The carbon dots produce emission with a narrow full-width at half-maximum (about 35 nm) with high photoluminescence quantum yield (70% ± 10%) and a colour coordinate (0.15, 0.05) closely approaching the standard colour Rec. 2020 (0.131, 0.046) specification. Structural and optical characterization, together with computational studies, reveal that amine-based passivation accounts for the efficient and high-colour-purity emission. Deep-blue LEDs based on these carbon dots display high performance with a maximum luminance of 5,240 cd m−2 and an external quantum efficiency of 4%, notably exceeding that of previously reported quantum-tuned solution-processed deep-blue LEDs.",

author = "Fanglong Yuan and Wang, {Ya Kun} and Geetu Sharma and Yitong Dong and Xiaopeng Zheng and Peicheng Li and Andrew Johnston and Golam Bappi and Fan, {James Z.} and Hao Kung and Bin Chen and Saidaminov, {Makhsud I.} and Kamalpreet Singh and Oleksandr Voznyy and Bakr, {Osman M.} and Lu, {Zheng Hong} and Sargent, {Edward H.}",

note = "Funding Information: This work is supported by Tier 1 Canada Research Chair in Organic Optoelectronics (grant number 950-220944), the Natural Sciences and Engineering Research Council of Canada (NSERC, grant number 216956-12), and the National Natural Science Foundation of China (grant number 11774304). E.H.S. and all coauthors from the Department of Electrical and Computer Engineering at the University of Toronto acknowledge financial support from the Ontario Research Fund−Research Excellence Program and from the Natural Sciences and Engineering Research Council of Canada (NSERC). M.I.S. acknowledges the support of the Banting Postdoctoral Fellowship Program, administered by the Government of Canada. Computations were performed on the Niagara supercomputer at the SciNet HPC Consortium. SciNet is funded by the Canada Foundation for Innovation; the Government of Ontario; Ontario Research Fund-Research Excellence; and the University of Toronto. Publisher Copyright: {\textcopyright} 2019, The Author(s), under exclusive licence to Springer Nature Limited.",

year = "2020",

month = mar,

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doi = "10.1038/s41566-019-0557-5",

language = "English (US)",

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T1 - Bright high-colour-purity deep-blue carbon dot light-emitting diodes via efficient edge amination

AU - Yuan, Fanglong

AU - Wang, Ya Kun

AU - Sharma, Geetu

AU - Dong, Yitong

AU - Zheng, Xiaopeng

AU - Li, Peicheng

AU - Johnston, Andrew

AU - Bappi, Golam

AU - Fan, James Z.

AU - Kung, Hao

AU - Chen, Bin

AU - Saidaminov, Makhsud I.

AU - Singh, Kamalpreet

AU - Voznyy, Oleksandr

AU - Bakr, Osman M.

AU - Lu, Zheng Hong

AU - Sargent, Edward H.

N1 - Funding Information: This work is supported by Tier 1 Canada Research Chair in Organic Optoelectronics (grant number 950-220944), the Natural Sciences and Engineering Research Council of Canada (NSERC, grant number 216956-12), and the National Natural Science Foundation of China (grant number 11774304). E.H.S. and all coauthors from the Department of Electrical and Computer Engineering at the University of Toronto acknowledge financial support from the Ontario Research Fund−Research Excellence Program and from the Natural Sciences and Engineering Research Council of Canada (NSERC). M.I.S. acknowledges the support of the Banting Postdoctoral Fellowship Program, administered by the Government of Canada. Computations were performed on the Niagara supercomputer at the SciNet HPC Consortium. SciNet is funded by the Canada Foundation for Innovation; the Government of Ontario; Ontario Research Fund-Research Excellence; and the University of Toronto. Publisher Copyright: © 2019, The Author(s), under exclusive licence to Springer Nature Limited.

PY - 2020/3/1

Y1 - 2020/3/1

N2 - Deep-blue light-emitting diodes (LEDs) (emitting at wavelengths of less than 450 nm) are important for solid-state lighting, vivid displays and high-density information storage. Colloidal quantum dots, typically based on heavy metals such as cadmium and lead, are promising candidates for deep-blue LEDs, but these have so far had external quantum efficiencies lower than 1.7%. Here we present deep-blue light-emitting materials and devices based on carbon dots. The carbon dots produce emission with a narrow full-width at half-maximum (about 35 nm) with high photoluminescence quantum yield (70% ± 10%) and a colour coordinate (0.15, 0.05) closely approaching the standard colour Rec. 2020 (0.131, 0.046) specification. Structural and optical characterization, together with computational studies, reveal that amine-based passivation accounts for the efficient and high-colour-purity emission. Deep-blue LEDs based on these carbon dots display high performance with a maximum luminance of 5,240 cd m−2 and an external quantum efficiency of 4%, notably exceeding that of previously reported quantum-tuned solution-processed deep-blue LEDs.

AB - Deep-blue light-emitting diodes (LEDs) (emitting at wavelengths of less than 450 nm) are important for solid-state lighting, vivid displays and high-density information storage. Colloidal quantum dots, typically based on heavy metals such as cadmium and lead, are promising candidates for deep-blue LEDs, but these have so far had external quantum efficiencies lower than 1.7%. Here we present deep-blue light-emitting materials and devices based on carbon dots. The carbon dots produce emission with a narrow full-width at half-maximum (about 35 nm) with high photoluminescence quantum yield (70% ± 10%) and a colour coordinate (0.15, 0.05) closely approaching the standard colour Rec. 2020 (0.131, 0.046) specification. Structural and optical characterization, together with computational studies, reveal that amine-based passivation accounts for the efficient and high-colour-purity emission. Deep-blue LEDs based on these carbon dots display high performance with a maximum luminance of 5,240 cd m−2 and an external quantum efficiency of 4%, notably exceeding that of previously reported quantum-tuned solution-processed deep-blue LEDs.

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Bright high-colour-purity deep-blue carbon dot light-emitting diodes via efficient edge amination

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