Nanocrystal light-emitting diodes based on type II nanoplatelets
Colloidal semiconductor nanoplatelets (NPLs) have recently emerged as a new family of semiconductor nanocrystals with distinctive structural and electronic properties originating from their atomically flat architecture. To date, type II NPLs have been demonstrated to possess great potential to optoe...
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sg-ntu-dr.10356-1395702020-05-20T06:10:56Z Nanocrystal light-emitting diodes based on type II nanoplatelets Liu, Baiquan Delikanli, Savas Gao, Yuan Dede, Didem Gungor, Kivanc Demir, Hilmi Volkan School of Electrical and Electronic Engineering School of Physical and Mathematical Sciences Luminous! Center of Excellence for Semiconductor Lighting and Displays Engineering::Electrical and electronic engineering Nanocrystal Nanoplatelet Colloidal semiconductor nanoplatelets (NPLs) have recently emerged as a new family of semiconductor nanocrystals with distinctive structural and electronic properties originating from their atomically flat architecture. To date, type II NPLs have been demonstrated to possess great potential to optoelectronic applications, such as solar cells and lasers. Herein, nanocrystal light-emitting diodes (LEDs) based on type II NPLs have been developed. The photoluminescence quantum yield of these used type II NPL (CdSe/CdSe0.8Te0.2 core/crown) is close to 85%. By exploring an effective inverted structure with the dual hole transport layer, the NPL-LEDs exhibit i) a turn-on voltage of 1.9 V, ii) a maximum luminance of 34520 cd m−2, iii) an EQE of 3.57% and a PE of 9.44 lm W−1. Compared with previous NPL-based LEDs, the performance of our devices is remarkably enhanced. For example, the luminance is 350-fold higher than the best inverted NPL-based LED. The findings may not only represent a significant step for NPL-based LEDs, but also unlock a new opportunity that this class of type II NPLs materials are promising for developing high-performance LEDs. NRF (Natl Research Foundation, S’pore) ASTAR (Agency for Sci., Tech. and Research, S’pore) 2020-05-20T06:10:56Z 2020-05-20T06:10:56Z 2018 Journal Article Liu, B., Delikanli, S., Gao, Y., Dede, D., Gungor, K., & Demir, H. V. (2018). Nanocrystal light-emitting diodes based on type II nanoplatelets. Nano Energy, 47, 115-122. doi:10.1016/j.nanoen.2018.02.004 2211-2855 https://hdl.handle.net/10356/139570 10.1016/j.nanoen.2018.02.004 2-s2.0-85042866011 47 115 122 en Nano Energy © 2018 Elsevier Ltd. All rights reserved. |
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Engineering::Electrical and electronic engineering Nanocrystal Nanoplatelet Liu, Baiquan Delikanli, Savas Gao, Yuan Dede, Didem Gungor, Kivanc Demir, Hilmi Volkan Nanocrystal light-emitting diodes based on type II nanoplatelets |
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Colloidal semiconductor nanoplatelets (NPLs) have recently emerged as a new family of semiconductor nanocrystals with distinctive structural and electronic properties originating from their atomically flat architecture. To date, type II NPLs have been demonstrated to possess great potential to optoelectronic applications, such as solar cells and lasers. Herein, nanocrystal light-emitting diodes (LEDs) based on type II NPLs have been developed. The photoluminescence quantum yield of these used type II NPL (CdSe/CdSe0.8Te0.2 core/crown) is close to 85%. By exploring an effective inverted structure with the dual hole transport layer, the NPL-LEDs exhibit i) a turn-on voltage of 1.9 V, ii) a maximum luminance of 34520 cd m−2, iii) an EQE of 3.57% and a PE of 9.44 lm W−1. Compared with previous NPL-based LEDs, the performance of our devices is remarkably enhanced. For example, the luminance is 350-fold higher than the best inverted NPL-based LED. The findings may not only represent a significant step for NPL-based LEDs, but also unlock a new opportunity that this class of type II NPLs materials are promising for developing high-performance LEDs. |
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School of Electrical and Electronic Engineering |
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School of Electrical and Electronic Engineering Liu, Baiquan Delikanli, Savas Gao, Yuan Dede, Didem Gungor, Kivanc Demir, Hilmi Volkan |
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Article |
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Liu, Baiquan Delikanli, Savas Gao, Yuan Dede, Didem Gungor, Kivanc Demir, Hilmi Volkan |
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Liu, Baiquan |
title |
Nanocrystal light-emitting diodes based on type II nanoplatelets |
title_short |
Nanocrystal light-emitting diodes based on type II nanoplatelets |
title_full |
Nanocrystal light-emitting diodes based on type II nanoplatelets |
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Nanocrystal light-emitting diodes based on type II nanoplatelets |
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Nanocrystal light-emitting diodes based on type II nanoplatelets |
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nanocrystal light-emitting diodes based on type ii nanoplatelets |
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2020 |
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https://hdl.handle.net/10356/139570 |
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