Suppression of non-radiative recombination to improve performance of colloidal quantum-dot LEDs with a Cs2CO3 solution treatment
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| Ngôn ngữ: | English |
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Nanotechnology
2021
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| Truy cập trực tuyến: | 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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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 |
| _version_ |
1751856251222884352 |
| score |
8.881002 |