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Suppression of non-radiative recombination to improve performance of colloidal quantum-dot LEDs with a Cs2CO3 solution treatment

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Main Author: Nguyen, Huu Tuan
Other Authors: Ryu, Shinyoung
Format: Article
Language:English
Published: Nanotechnology 2021
Online Access:https://iopscience.iop.org/article/10.1088/1361-6528/abd780
https://dlib.phenikaa-uni.edu.vn/handle/PNK/1763
https://doi.org/10.1088/1361-6528/abd780
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spelling oai:localhost:PNK-17632022-08-17T05:54:40Z Suppression of non-radiative recombination to improve performance of colloidal quantum-dot LEDs with a Cs2CO3 solution treatment Nguyen, Huu Tuan Ryu, Shinyoung Duong, Anh Tuan Lee, Soonil Q1 We report a five-fold luminance increase of green-light-emitting CdSe@ZnS quantum-dot LEDs (QLEDs) in response to treatment with a 2-ethoxyethanol solution of cesium carbonate (Cs2CO3). The maximum luminous yield of Cs2CO3-treated QLED is as high as 3.41 cd A−1 at 6.4 V. To elucidate device-performance improvement, we model measured currents as the sum of radiative and non-radiative recombination components, which are respectively represented by modified Shockley equations. Variations in model parameters show that a shift in Fermi level, reduction of barrier heights, and passivation of mid-gap defect states are the main results of Cs2CO3 treatment. In spite of a large luminance difference, light-extraction efficiency remains the same at 9% regardless of Cs2CO3 treatment because of the similarity in optical structures. 2021-06-15T03:02:10Z 2021-06-15T03:02:10Z 2021 Article Working Paper https://iopscience.iop.org/article/10.1088/1361-6528/abd780 https://dlib.phenikaa-uni.edu.vn/handle/PNK/1763 https://doi.org/10.1088/1361-6528/abd780 en Nanotechnology
institution Digital Phenikaa
collection Digital Phenikaa
language English
description Q1
author2 Ryu, Shinyoung
author_facet Ryu, Shinyoung
Nguyen, Huu Tuan
format Article
author Nguyen, Huu Tuan
spellingShingle Nguyen, Huu Tuan
Suppression of non-radiative recombination to improve performance of colloidal quantum-dot LEDs with a Cs2CO3 solution treatment
author_sort Nguyen, Huu Tuan
title Suppression of non-radiative recombination to improve performance of colloidal quantum-dot LEDs with a Cs2CO3 solution treatment
title_short Suppression of non-radiative recombination to improve performance of colloidal quantum-dot LEDs with a Cs2CO3 solution treatment
title_full Suppression of non-radiative recombination to improve performance of colloidal quantum-dot LEDs with a Cs2CO3 solution treatment
title_fullStr Suppression of non-radiative recombination to improve performance of colloidal quantum-dot LEDs with a Cs2CO3 solution treatment
title_full_unstemmed Suppression of non-radiative recombination to improve performance of colloidal quantum-dot LEDs with a Cs2CO3 solution treatment
title_sort suppression of non-radiative recombination to improve performance of colloidal quantum-dot leds with a cs2co3 solution treatment
publisher Nanotechnology
publishDate 2021
url https://iopscience.iop.org/article/10.1088/1361-6528/abd780
https://dlib.phenikaa-uni.edu.vn/handle/PNK/1763
https://doi.org/10.1088/1361-6528/abd780
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score 8.893527

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