Efficient Red/Green/Blue Tandem Quantum-Dot Light-Emitting Diodes with External Quantum Efficiency Exceeding 21%

Zhang, Heng; Chen, Shuming; Sun, Xiao Wei

2018-01

10.1021/acsnano.7b07867

ACS Nano   影响因子和分区

1936-0851

1936-086X

Highly efficient tandem quantum-dot light emitting diodes (QLEDs) are developed by using an interconnecting layer (ICL) with the structure of ZnMgO/Al/HATCN/MoO3. The developed ICL exhibits high transparency, efficient charge generation/injection capability, and high robustness to resist solvent damage during deposition of the upper functional layers. With the proposed ICL; full color (red/green/blue, R/G/B) tandem QLEDs are demonstrated with extremely high current efficiency and external quantum efficiency (EQE): 17.9 cd/A and 21.4% for B-QLEDs, 121.5 cd/A and 27.6% for G-QLEDs, 41.5 cd/A and 23.1% for R-QLEDs. To the best of our knowledge, these are the highest values ever reported. In addition, the EQEs of R-, G-, and B-QLEDs all exceed 21%. The high efficiency can be well maintained over a wide range of luminance from 10(2) to 104 cd/m(2). For example, even at a high brightness of 20 000 cd/m(2), the EQE of R-, G-, and B-QLEDs can still sustain its 96%, 99%, and 78% maximum value, respectively. The demonstrated full-color tandem QLEDs, with extremely high efficiency, tong operational lifetime, low roll-off efficiency, and high color purity, would be ideal candidates to bring QLEDs into the next generation of full-color displays and the solid-state lighting market.

quantum dot light-emitting diodes tandem structure interconnecting layer high efficiency

SCI ; EI

英语

NI论文

第一 ; 通讯

Shenzhen Peacock Plan[KQTD2015071710313656]

Chemistry ; Science & Technology - Other Topics ; Materials Science

Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary

WOS:000423495200075

AMER CHEMICAL SOC

20180804821602

Color ; Diodes ; Efficiency ; Light emitting diodes ; Luminance ; Nanocrystals ; Organic light emitting diodes (OLED) ; Semiconductor quantum dots

Semiconductor Devices and Integrated Circuits:714.2 ; Light/Optics:741.1 ; Nanotechnology:761 ; Production Engineering:913.1 ; Quantum Theory; Quantum Mechanics:931.4

Web of Science

Southern Univ Sci & Technol, Dept Elect & Elect Engn, Shenzhen 518055, Peoples R China

Zhang, Heng,Chen, Shuming,Sun, Xiao Wei. Efficient Red/Green/Blue Tandem Quantum-Dot Light-Emitting Diodes with External Quantum Efficiency Exceeding 21%[J]. ACS Nano,2018,12(1):697-704.

Zhang, Heng,Chen, Shuming,&Sun, Xiao Wei.(2018).Efficient Red/Green/Blue Tandem Quantum-Dot Light-Emitting Diodes with External Quantum Efficiency Exceeding 21%.ACS Nano,12(1),697-704.

Zhang, Heng,et al."Efficient Red/Green/Blue Tandem Quantum-Dot Light-Emitting Diodes with External Quantum Efficiency Exceeding 21%".ACS Nano 12.1(2018):697-704.