Item Infomation
Title: | Suppression of non-radiative recombination to improve performance of colloidal quantum-dot LEDs with a Cs2CO3 solution treatment |
Authors: | Nguyen, Huu Tuan |
Advisor: | Ryu, Shinyoung Duong, Anh Tuan Lee, Soonil |
Issue Date: | 2021 |
Publisher: | Nanotechnology |
Abstract: | 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. |
Description: | Q1 |
URI: | https://iopscience.iop.org/article/10.1088/1361-6528/abd780 https://dlib.phenikaa-uni.edu.vn/handle/PNK/1763 |
Appears in Collections | Bài báo khoa học |
ABSTRACTS VIEWS
34
FULLTEXT VIEWS
0
Files in This Item:
There are no files associated with this item.