Stability of quantum-dot light emitting diodes with alkali metal carbonates blending in mg doped zno electron transport layer

Hyo Min Kim; Wonkyeong Jeong; Joo Hyun Kim; Jin Jang

doi:10.3390/nano10122423

Stability of quantum-dot light emitting diodes with alkali metal carbonates blending in mg doped zno electron transport layer

Hyo Min Kim, Wonkyeong Jeong, Joo Hyun Kim, Jin Jang

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

6 Citations (Scopus)

Abstract

We report here the fabrication of highly efficient and long-lasting quantum-dot light emitting diodes (QLEDs) by blending various alkali metal carbonate in magnesium (Mg) doped zinc oxide (ZnO) (MZO) electron transport layer (ETL). Alkali metal carbonates blending in MZO, X₂ CO₃:MZO, control the band-gap, electrical properties, and thermal stability. This can therefore enhance the operational lifetime of QLEDs. It is found that the conductivity of X₂ CO₃:MZO film can be controlled and the thermal stability of ETLs could be improved by X₂ CO₃ blending in MZO. The inverted red QLEDs (R-QLEDs) with Cs₂ CO₃:MZO, Rb₂ CO₃:MZO, and K₂ CO₃:MZO ETLs exhibited the operational lifetime of 407 h for the R-QLEDs with Cs₂ CO₃:MZO, 620 h with Rb₂ CO₃:MZO and 94 h with K₂ CO₃:MZO ETLs at T₉₅ with the initial luminance of 1000 cd/m² . Note that all red QLEDs showed the high brightness over 150,000 cd/m² But, the R-QLEDs with Na₂ CO₃:MZO and Li₂ CO₃:MZO ETLs exhibited shorter operational lifetime and poor brightness than the R-QLED with pristine MZO ETL.

Original language	English
Article number	2423
Pages (from-to)	1-14
Number of pages	14
Journal	Nanomaterials
Volume	10
Issue number	12
DOIs	https://doi.org/10.3390/nano10122423
Publication status	Published - Dec 2020

Bibliographical note

Publisher Copyright:
© 2020 by the authors. Licensee MDPI, Basel, Switzerland.

Keywords

Alkali metal carbonate
Metal oxide
Mg doped ZnO
Operational lifetime
QLED

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10.3390/nano10122423

Cite this

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title = "Stability of quantum-dot light emitting diodes with alkali metal carbonates blending in mg doped zno electron transport layer",

abstract = "We report here the fabrication of highly efficient and long-lasting quantum-dot light emitting diodes (QLEDs) by blending various alkali metal carbonate in magnesium (Mg) doped zinc oxide (ZnO) (MZO) electron transport layer (ETL). Alkali metal carbonates blending in MZO, X2 CO3:MZO, control the band-gap, electrical properties, and thermal stability. This can therefore enhance the operational lifetime of QLEDs. It is found that the conductivity of X2 CO3:MZO film can be controlled and the thermal stability of ETLs could be improved by X2 CO3 blending in MZO. The inverted red QLEDs (R-QLEDs) with Cs2 CO3:MZO, Rb2 CO3:MZO, and K2 CO3:MZO ETLs exhibited the operational lifetime of 407 h for the R-QLEDs with Cs2 CO3:MZO, 620 h with Rb2 CO3:MZO and 94 h with K2 CO3:MZO ETLs at T95 with the initial luminance of 1000 cd/m2 . Note that all red QLEDs showed the high brightness over 150,000 cd/m2 But, the R-QLEDs with Na2 CO3:MZO and Li2 CO3:MZO ETLs exhibited shorter operational lifetime and poor brightness than the R-QLED with pristine MZO ETL.",

keywords = "Alkali metal carbonate, Metal oxide, Mg doped ZnO, Operational lifetime, QLED",

author = "Kim, {Hyo Min} and Wonkyeong Jeong and Kim, {Joo Hyun} and Jin Jang",

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AU - Kim, Hyo Min

AU - Jeong, Wonkyeong

AU - Kim, Joo Hyun

AU - Jang, Jin

PY - 2020/12

Y1 - 2020/12

N2 - We report here the fabrication of highly efficient and long-lasting quantum-dot light emitting diodes (QLEDs) by blending various alkali metal carbonate in magnesium (Mg) doped zinc oxide (ZnO) (MZO) electron transport layer (ETL). Alkali metal carbonates blending in MZO, X2 CO3:MZO, control the band-gap, electrical properties, and thermal stability. This can therefore enhance the operational lifetime of QLEDs. It is found that the conductivity of X2 CO3:MZO film can be controlled and the thermal stability of ETLs could be improved by X2 CO3 blending in MZO. The inverted red QLEDs (R-QLEDs) with Cs2 CO3:MZO, Rb2 CO3:MZO, and K2 CO3:MZO ETLs exhibited the operational lifetime of 407 h for the R-QLEDs with Cs2 CO3:MZO, 620 h with Rb2 CO3:MZO and 94 h with K2 CO3:MZO ETLs at T95 with the initial luminance of 1000 cd/m2 . Note that all red QLEDs showed the high brightness over 150,000 cd/m2 But, the R-QLEDs with Na2 CO3:MZO and Li2 CO3:MZO ETLs exhibited shorter operational lifetime and poor brightness than the R-QLED with pristine MZO ETL.

AB - We report here the fabrication of highly efficient and long-lasting quantum-dot light emitting diodes (QLEDs) by blending various alkali metal carbonate in magnesium (Mg) doped zinc oxide (ZnO) (MZO) electron transport layer (ETL). Alkali metal carbonates blending in MZO, X2 CO3:MZO, control the band-gap, electrical properties, and thermal stability. This can therefore enhance the operational lifetime of QLEDs. It is found that the conductivity of X2 CO3:MZO film can be controlled and the thermal stability of ETLs could be improved by X2 CO3 blending in MZO. The inverted red QLEDs (R-QLEDs) with Cs2 CO3:MZO, Rb2 CO3:MZO, and K2 CO3:MZO ETLs exhibited the operational lifetime of 407 h for the R-QLEDs with Cs2 CO3:MZO, 620 h with Rb2 CO3:MZO and 94 h with K2 CO3:MZO ETLs at T95 with the initial luminance of 1000 cd/m2 . Note that all red QLEDs showed the high brightness over 150,000 cd/m2 But, the R-QLEDs with Na2 CO3:MZO and Li2 CO3:MZO ETLs exhibited shorter operational lifetime and poor brightness than the R-QLED with pristine MZO ETL.

KW - Alkali metal carbonate

KW - Metal oxide

KW - Mg doped ZnO

KW - Operational lifetime

KW - QLED

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JF - Nanomaterials

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ER -

Stability of quantum-dot light emitting diodes with alkali metal carbonates blending in mg doped zno electron transport layer

Abstract

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Keywords

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