Bright infra-red quantum dot light-emitting diodes through efficient suppressing of electrons

Marus, M.1,2,3; Xia, Y.4; Zhong, H.2,3; Li, D.2,3; Ding, S.1,2,3; Turavets, U.2,3; Xu, B.1,2,3; Wang, K.2,3; Zhang, J.4; Sun, X. W.1,2,3

2020-05-11

10.1063/5.0005843

APPLIED PHYSICS LETTERS   影响因子和分区

0003-6951

1077-3118

Colloidal quantum dots are promising materials for near infrared light emitting diodes (NIR QLEDs) owing to the widely tunable wavelength of emitted light, high quantum efficiency, and full integration with solution processing techniques. However, the imbalance of charge carriers in NIR QLEDs greatly limits their performance, which in turn narrows the scope of their application. Here, we propose an approach for improving the brightness and stability of NIR PbS QLEDs through balancing the device current by an ultra-thin inorganic aluminum oxide (Al2O3) electron suppressing layer. This modification resulted in a 7.42 W/sr/m(2) peak radiance at 1.3 mu m wavelength. Moreover, the halide-capped PbS-based NIR QLEDs remained stable under constant current drive for over 144 h. Published under license by AIP Publishing.

SCI ; EI

英语

NI期刊 ; NI论文

通讯

National Key Research and Development Program of China[2016YFB0401702] ; National Natural Science Foundation of China[61674074][61405089][61974052] ; Shenzhen Peacock Team Project[KQTD2016030111203005] ; Shenzhen Innovation Project[JCYJ20160301113356947][JCYJ20160301113537474]

Physics

Physics, Applied

WOS:000543738300001

AMER INST PHYSICS

20214711187206

Alumina ; Aluminum oxide ; IV-VI semiconductors ; Lead compounds ; Nanocrystals ; Organic light emitting diodes (OLED) ; Quantum efficiency ; Semiconductor quantum dots ; Sols

Semiconducting Materials:712.1 ; Semiconductor Devices and Integrated Circuits:714.2 ; Nanotechnology:761 ; Chemical Products Generally:804 ; Inorganic Compounds:804.2 ; Quantum Theory; Quantum Mechanics:931.4 ; Crystalline Solids:933.1

PHYSICS

Web of Science

1.Shenzhen Planck Innovat Technol Co Ltd, Shenzhen 518112, Peoples R China
2.Southern Univ Sci & Technol SUSTech, Shenzhen Key Lab Adv Quantum Dot Displays & Light, Guangdong Higher Educ Key Lab Adv Quantum Dot Dis, 1088 Xueyuan Ave, Shenzhen 518055, Peoples R China
3.Southern Univ Sci & Technol SUSTech, Dept Elect & Elect Engn, 1088 Xueyuan Ave, Shenzhen 518055, Peoples R China
4.Huazhong Univ Sci & Technol, Sch Opt & Elect Informat, Wuhan 430074, Peoples R China

Marus, M.,Xia, Y.,Zhong, H.,et al. Bright infra-red quantum dot light-emitting diodes through efficient suppressing of electrons[J]. APPLIED PHYSICS LETTERS,2020,116(19).

Marus, M..,Xia, Y..,Zhong, H..,Li, D..,Ding, S..,...&Sun, X. W..(2020).Bright infra-red quantum dot light-emitting diodes through efficient suppressing of electrons.APPLIED PHYSICS LETTERS,116(19).

Marus, M.,et al."Bright infra-red quantum dot light-emitting diodes through efficient suppressing of electrons".APPLIED PHYSICS LETTERS 116.19(2020).