Highly spectra-stable pure blue perovskite light-emitting diodes based on copper and potassium co-doped quantum dots

Chen，Fang1,2,3; Ming，Wenjie5; Li，Yongfei6; Gao，Yun1,2; Pasquale，Lea7; Yao，Kexin6; Huang，Boyuan5; Cai，Qiuting1,2; Lu，Guochao1,2; Song，Jizhong8; Prato，Mirko7; Dai，Xingliang1,2,3,4; He，Haiping1,2,3,4; Ye，Zhizhen1,2,3,4

2023-05-01

10.1007/s12274-023-5452-1

Nano Research   影响因子和分区

1998-0124

1998-0000

Halide perovskite light emitting diodes (LEDs) have gained great progress in recent years. However, mixed-halide perovskites for blue LEDs usually suffer from electroluminescence (EL) spectra shift at a high applied voltage or current density, limiting their efficiency. In this work, we report a strategy of using single-layer perovskite quantum dots (QDs) film to tackle the electroluminescence spectra shift in pure-blue perovskite LEDs and improve the LED efficiency by co-doping copper and potassium in the mixed-halide perovskite QDs. As a result, we obtained pure-blue halide perovskite QD-LEDs with stable EL spectra centred at 469 nm even at a current density of 1,617 mA·cm. The optimal device presents a maximum external quantum efficiency (EQE) of 2.0%. The average maximum EQE and luminance of the LEDs are 1.49% and 393 cd·m, increasing 62% and 66% compared with the control LEDs. Our study provides an effective strategy for achieving spectra-stable and highly efficient pure-blue perovskite LEDs. [Figure not available: see fulltext.]

blue LED light-emitting diode metal doping perovskite quantum dot stable electroluminescence spectra

SCI ; EI

英语

其他

National Natural Science Foundation of China["52102188","52072337"] ; Key Research and Development Program of Zhejiang Province[2021C01030] ; Natural Science Foundation of Zhejiang Province[LQ21F040005] ; Postdoctoral Science Foundation of Zhejiang Province[ZJ2022132] ; Science and Technology Project of Wenzhou[2022G0253] ; Leading Talent Entrepreneurship Project of Ouhai District, Wenzhou City, the Young Elite Scientists Sponsorship Program by CAST[YESS20210444] ; Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering[2022SZ-TD004]

Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics

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

WOS:001000950900008

TSINGHUA UNIV PRESS

20231613942153

Electroluminescence ; Nanocrystals ; Organic light emitting diodes (OLED) ; Potassium compounds ; Quantum efficiency ; Semiconductor doping ; Semiconductor quantum dots

Minerals:482.2 ; Electricity: Basic Concepts and Phenomena:701.1 ; Semiconducting Materials:712.1 ; Semiconductor Devices and Integrated Circuits:714.2 ; Light, Optics and Optical Devices:741 ; Nanotechnology:761 ; Quantum Theory; Quantum Mechanics:931.4 ; Crystalline Solids:933.1

2-s2.0-85152798717

Scopus

1.School of Materials Science and Engineering,State Key Laboratory of Silicon Materials,Zhejiang University,Hangzhou,310027,China
2.Wenzhou Key Laboratory of Novel Optoelectronic and Nano Materials,Institute of Wenzhou,Zhejiang University,Wenzhou,325006,China
3.Wenzhou XINXINTAIJING Tech. Co. Ltd.,Wenzhou,325006,China
4.Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering,Taiyuan,030000,China
5.Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
6.Multi-scale Porous Materials Center,Institute of Advanced Interdisciplinary Studies & School of Chemistry and Chemical Engineering,Chongqing University,Chongqing,400044,China
7.Materials Characterization Facility,Istituto Italiano di Tecnologia,Genova,16163,Italy
8.School of Physics and Microelectronics,Zhengzhou University,Zhengzhou,450052,China

Chen，Fang,Ming，Wenjie,Li，Yongfei,et al. Highly spectra-stable pure blue perovskite light-emitting diodes based on copper and potassium co-doped quantum dots[J]. Nano Research,2023,16(5):7654-7660.

Chen，Fang.,Ming，Wenjie.,Li，Yongfei.,Gao，Yun.,Pasquale，Lea.,...&Ye，Zhizhen.(2023).Highly spectra-stable pure blue perovskite light-emitting diodes based on copper and potassium co-doped quantum dots.Nano Research,16(5),7654-7660.

Chen，Fang,et al."Highly spectra-stable pure blue perovskite light-emitting diodes based on copper and potassium co-doped quantum dots".Nano Research 16.5(2023):7654-7660.