Blue-emitting CdSe nanoplatelets enabled by sulfur-alloyed heterostructures for light-emitting diodes with low turn-on voltage
Colloidal nanoplatelets (NPLs) have emerged as the last class of semiconductor nanocrystals for their potential optoelectronic applications. The heterostructures of these nanocrystals can achieve high photoluminescence quantum yield and enhanced photostability, along with color purity. Such advantag...
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sg-ntu-dr.10356-1549892023-11-24T02:34:40Z Blue-emitting CdSe nanoplatelets enabled by sulfur-alloyed heterostructures for light-emitting diodes with low turn-on voltage İzmir, Merve Sharma, Ashma Shendre, Sushant Durmusoglu, Emek Goksu Sharma, Vijay Kumar Shabani, Farzan Baruj, Hamed Dehghanpour Delikanli, Savas Sharma, Manoj Demir, Hilmi Volkan School of Electrical and Electronic Engineering School of Materials Science and Engineering School of Physical and Mathematical Sciences The Photonics Institute LUMINOUS! Centre of Excellence for Semiconductor Lighting & Displays Engineering::Electrical and electronic engineering::Optics, optoelectronics, photonics Colloidal Nanoplatelets Alloying Colloidal nanoplatelets (NPLs) have emerged as the last class of semiconductor nanocrystals for their potential optoelectronic applications. The heterostructures of these nanocrystals can achieve high photoluminescence quantum yield and enhanced photostability, along with color purity. Such advantages make them a promising candidate for solution-processable light-emitting diodes (LEDs). However, to date, blue-emitting CdSe nanoplatelets (NPLs) exhibit poor photoluminescence quantum yield and also typically suffer from a rolled-up morphology. To mitigate these problems in this work, we propose and demonstrate efficient alloyed 4 ML CdSe1-xSx nanoplatelets having a CdS crown with enhanced photoluminescence quantum yields (up to 60%) in the blue region (462-487 nm). We successfully used these NPLs as an electrically driven active emitter in the blue-emitting NPL-LEDs with a low turn-on voltage of ∼4 V. The Commission Internationale de L'Eclairage (CIE) coordinates of (0.23, 0.14) were obtained for these blue-emitting NPL-LEDs. These emitters could potentially open up the opportunity for full-color displays using these NPL-based blue LEDs in conjunction with the red and green ones. Ministry of Education (MOE) National Research Foundation (NRF) Submitted/Accepted version This research is supported by the National Research Foundation, Prime Minister’s Office, Singapore under its NRF Investigatorship Award program (NRF-NRFI2016-08) and the Ministry of Education Tier 1 grant (MOE-RG62/20). H.V.D. also gratefully acknowledges the support from TUBA 2022-01-24T04:35:49Z 2022-01-24T04:35:49Z 2022 Journal Article İzmir, M., Sharma, A., Shendre, S., Durmusoglu, E. G., Sharma, V. K., Shabani, F., Baruj, H. D., Delikanli, S., Sharma, M. & Demir, H. V. (2022). Blue-emitting CdSe nanoplatelets enabled by sulfur-alloyed heterostructures for light-emitting diodes with low turn-on voltage. ACS Applied Nano Materials, 5(1), 1367-1376. https://dx.doi.org/10.1021/acsanm.1c03939 2574-0970 https://hdl.handle.net/10356/154989 10.1021/acsanm.1c03939 2-s2.0-85122587178 1 5 1367 1376 en NRF-NRFI2016-08 MOE-RG62/20 ACS Applied Nano Materials This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Applied Nano Materials, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acsanm.1c03939. application/pdf |
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Engineering::Electrical and electronic engineering::Optics, optoelectronics, photonics Colloidal Nanoplatelets Alloying |
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Engineering::Electrical and electronic engineering::Optics, optoelectronics, photonics Colloidal Nanoplatelets Alloying İzmir, Merve Sharma, Ashma Shendre, Sushant Durmusoglu, Emek Goksu Sharma, Vijay Kumar Shabani, Farzan Baruj, Hamed Dehghanpour Delikanli, Savas Sharma, Manoj Demir, Hilmi Volkan Blue-emitting CdSe nanoplatelets enabled by sulfur-alloyed heterostructures for light-emitting diodes with low turn-on voltage |
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Colloidal nanoplatelets (NPLs) have emerged as the last class of semiconductor nanocrystals for their potential optoelectronic applications. The heterostructures of these nanocrystals can achieve high photoluminescence quantum yield and enhanced photostability, along with color purity. Such advantages make them a promising candidate for solution-processable light-emitting diodes (LEDs). However, to date, blue-emitting CdSe nanoplatelets (NPLs) exhibit poor photoluminescence quantum yield and also typically suffer from a rolled-up morphology. To mitigate these problems in this work, we propose and demonstrate efficient alloyed 4 ML CdSe1-xSx nanoplatelets having a CdS crown with enhanced photoluminescence quantum yields (up to 60%) in the blue region (462-487 nm). We successfully used these NPLs as an electrically driven active emitter in the blue-emitting NPL-LEDs with a low turn-on voltage of ∼4 V. The Commission Internationale de L'Eclairage (CIE) coordinates of (0.23, 0.14) were obtained for these blue-emitting NPL-LEDs. These emitters could potentially open up the opportunity for full-color displays using these NPL-based blue LEDs in conjunction with the red and green ones. |
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School of Electrical and Electronic Engineering |
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School of Electrical and Electronic Engineering İzmir, Merve Sharma, Ashma Shendre, Sushant Durmusoglu, Emek Goksu Sharma, Vijay Kumar Shabani, Farzan Baruj, Hamed Dehghanpour Delikanli, Savas Sharma, Manoj Demir, Hilmi Volkan |
format |
Article |
author |
İzmir, Merve Sharma, Ashma Shendre, Sushant Durmusoglu, Emek Goksu Sharma, Vijay Kumar Shabani, Farzan Baruj, Hamed Dehghanpour Delikanli, Savas Sharma, Manoj Demir, Hilmi Volkan |
author_sort |
İzmir, Merve |
title |
Blue-emitting CdSe nanoplatelets enabled by sulfur-alloyed heterostructures for light-emitting diodes with low turn-on voltage |
title_short |
Blue-emitting CdSe nanoplatelets enabled by sulfur-alloyed heterostructures for light-emitting diodes with low turn-on voltage |
title_full |
Blue-emitting CdSe nanoplatelets enabled by sulfur-alloyed heterostructures for light-emitting diodes with low turn-on voltage |
title_fullStr |
Blue-emitting CdSe nanoplatelets enabled by sulfur-alloyed heterostructures for light-emitting diodes with low turn-on voltage |
title_full_unstemmed |
Blue-emitting CdSe nanoplatelets enabled by sulfur-alloyed heterostructures for light-emitting diodes with low turn-on voltage |
title_sort |
blue-emitting cdse nanoplatelets enabled by sulfur-alloyed heterostructures for light-emitting diodes with low turn-on voltage |
publishDate |
2022 |
url |
https://hdl.handle.net/10356/154989 |
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1783955507318358016 |