Polymer hybrid white quantum dots light-emitting diodes with a nanostructured electron injection layer

Hsin Ying Lee; Shuo Wen Yen; Ching Ting Lee

doi:10.1364/OE.392915

Polymer hybrid white quantum dots light-emitting diodes with a nanostructured electron injection layer

Hsin Ying Lee, Shuo Wen Yen, Ching Ting Lee

Department of Photonics

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

In this study, poly(N-vinylcarbazole) (PVK) polymer was blended with various dimensional CdSe/ZnS core-shell quantum dots to be used as a single emissive layer of white quantum dots light-emitting diodes (WQLEDs). Besides, the nanostructured ITO/ZnO nanorod array was used as electron transport/injection layer to shorten carrier transport distance, accelerate carrier transport velocity, and enhance carrier transport surface area. Consequently, luminance and luminous efficiency were increased by the resulting increase of the carrier injection current density and the hole-electron recombination opportunity. The CIE of (0.329, 0.331) was obtained for the WQLEDs by using the weight ratio of 1.5:1.3:2.2 of the red, green, and blue (RGB) quantum dots. Compared with the WQLEDs without the nanorod array, the WQLEDs with the 1.5-μm-periodic ITO/ZnO nanorod array obtained an increased luminance of 16333 cd/m2 (compared with 7191 cd/m2) and an increased luminous efficiency of 3.13 cd/A (compared with 2.30 cd/A).

Original language	English
Pages (from-to)	17299-17306
Number of pages	8
Journal	Optics Express
Volume	28
Issue number	12
DOIs	https://doi.org/10.1364/OE.392915
Publication status	Published - 2020 Jun 8

All Science Journal Classification (ASJC) codes

Atomic and Molecular Physics, and Optics

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10.1364/OE.392915

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title = "Polymer hybrid white quantum dots light-emitting diodes with a nanostructured electron injection layer",

abstract = "In this study, poly(N-vinylcarbazole) (PVK) polymer was blended with various dimensional CdSe/ZnS core-shell quantum dots to be used as a single emissive layer of white quantum dots light-emitting diodes (WQLEDs). Besides, the nanostructured ITO/ZnO nanorod array was used as electron transport/injection layer to shorten carrier transport distance, accelerate carrier transport velocity, and enhance carrier transport surface area. Consequently, luminance and luminous efficiency were increased by the resulting increase of the carrier injection current density and the hole-electron recombination opportunity. The CIE of (0.329, 0.331) was obtained for the WQLEDs by using the weight ratio of 1.5:1.3:2.2 of the red, green, and blue (RGB) quantum dots. Compared with the WQLEDs without the nanorod array, the WQLEDs with the 1.5-μm-periodic ITO/ZnO nanorod array obtained an increased luminance of 16333 cd/m2 (compared with 7191 cd/m2) and an increased luminous efficiency of 3.13 cd/A (compared with 2.30 cd/A).",

author = "Lee, {Hsin Ying} and Yen, {Shuo Wen} and Lee, {Ching Ting}",

note = "Funding Information: We gratefully acknowledge the Ministry of Science and Technology of Taiwan and the Taiwan Semiconductor Research Institute for the support. Publisher Copyright: {\textcopyright} 2020 Optical Society of America.",

year = "2020",

month = jun,

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doi = "10.1364/OE.392915",

language = "English",

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T1 - Polymer hybrid white quantum dots light-emitting diodes with a nanostructured electron injection layer

AU - Lee, Hsin Ying

AU - Yen, Shuo Wen

AU - Lee, Ching Ting

N1 - Funding Information: We gratefully acknowledge the Ministry of Science and Technology of Taiwan and the Taiwan Semiconductor Research Institute for the support. Publisher Copyright: © 2020 Optical Society of America.

PY - 2020/6/8

Y1 - 2020/6/8

N2 - In this study, poly(N-vinylcarbazole) (PVK) polymer was blended with various dimensional CdSe/ZnS core-shell quantum dots to be used as a single emissive layer of white quantum dots light-emitting diodes (WQLEDs). Besides, the nanostructured ITO/ZnO nanorod array was used as electron transport/injection layer to shorten carrier transport distance, accelerate carrier transport velocity, and enhance carrier transport surface area. Consequently, luminance and luminous efficiency were increased by the resulting increase of the carrier injection current density and the hole-electron recombination opportunity. The CIE of (0.329, 0.331) was obtained for the WQLEDs by using the weight ratio of 1.5:1.3:2.2 of the red, green, and blue (RGB) quantum dots. Compared with the WQLEDs without the nanorod array, the WQLEDs with the 1.5-μm-periodic ITO/ZnO nanorod array obtained an increased luminance of 16333 cd/m2 (compared with 7191 cd/m2) and an increased luminous efficiency of 3.13 cd/A (compared with 2.30 cd/A).

AB - In this study, poly(N-vinylcarbazole) (PVK) polymer was blended with various dimensional CdSe/ZnS core-shell quantum dots to be used as a single emissive layer of white quantum dots light-emitting diodes (WQLEDs). Besides, the nanostructured ITO/ZnO nanorod array was used as electron transport/injection layer to shorten carrier transport distance, accelerate carrier transport velocity, and enhance carrier transport surface area. Consequently, luminance and luminous efficiency were increased by the resulting increase of the carrier injection current density and the hole-electron recombination opportunity. The CIE of (0.329, 0.331) was obtained for the WQLEDs by using the weight ratio of 1.5:1.3:2.2 of the red, green, and blue (RGB) quantum dots. Compared with the WQLEDs without the nanorod array, the WQLEDs with the 1.5-μm-periodic ITO/ZnO nanorod array obtained an increased luminance of 16333 cd/m2 (compared with 7191 cd/m2) and an increased luminous efficiency of 3.13 cd/A (compared with 2.30 cd/A).

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Polymer hybrid white quantum dots light-emitting diodes with a nanostructured electron injection layer

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