Inorganic "Artificial Phase" CdSe/ZnS QDs Serve as the Host Material for White Emission Quasi-2D Perovskite Light Emitting Devices

Liu, Wenbo1,2,3,4; Jiang, Zhengyan5; Liu, Pai1,2,3; Wang, Kai1,2,3; Xu, Baomin5; Wang, Guoping4; Sun, Xiao Wei1,2,3

2023-06-01

10.1002/adom.202300631

ADVANCED OPTICAL MATERIALS   影响因子和分区

2195-1071

Quasi-2D perovskite light-emitting devices (PeLEDs) show great potential for the next generation of displays due to the surprising improvement of external quantum efficiency (EQE). However, the development of white emission Quasi-2D PeLEDs is frustrating. One obstacle is inefficient energy transfer among different electroluminescence (EL) emissive phases of the Quasi-2D perovskite layer. Here, a new strategy is proposed to resolve this problem, which is inducing an external artificial phase as the host material and building a new energy transfer path between the artificial phase and the EL emissive phases of the Quasi-2D perovskite layer. Blue CdSe/ZnS quantum dots (QDs) are an ideal choice since the size of CdSe/ZnS QDs is similar to that of perovskite grains in Quasi-2D PeLEDs and has good operational stability. The fabricated PeLEDs show a voltage-stable 1931 Commission Internationale de L'Eclairage (CIE) coordinate located at the white emission area (0.33,0.33). The highest luminescence is 365.32 cd m(-2). The fabricated PeLEDs can maintain the 95% EQE for >500 s, which is ten times higher than pure Quasi-2D PeLEDs. This work is the first to propose that inorganic QDs can serve as the host material for Quasi-2D PeLEDs, which offers a powerful tool for researchers to boost the efficiency and stability performance of white emission Quasi-2D PeLEDs.

CdSe ZnS quantum dots quasi-2D perovskite light emitting devices white emission

SCI ; EI

英语

第一 ; 通讯

National Key Research and Development Program[2017YFE0120400] ; National Natural Science Foundation of China["61674074","61875082","61405089","62005115"] ; Key-Area Research and Development Program of Guangdong Province["2019B010925001","2019B010924001"] ; Guangdong University Key Laboratory for Advanced Quantum Dot Displays and Lighting[2017KSYS007] ; Shenzhen Peacock Team Project[ZDSYS201707281632549] ; Shenzhen Key Laboratory for Advanced Quantum Dot Displays and Lighting[2019B121205001] ; null[KQTD2016030111203005]

Materials Science ; Optics

Materials Science, Multidisciplinary ; Optics

WOS:001004621900001

WILEY-V C H VERLAG GMBH

20232414212622

Cadmium compounds ; Current density ; Display devices ; Electroluminescence ; Energy transfer ; II-VI semiconductors ; Nanocrystals ; Organic light emitting diodes (OLED) ; Perovskite ; Quantum efficiency

Minerals:482.2 ; Electricity: Basic Concepts and Phenomena:701.1 ; Semiconducting Materials:712.1 ; Semiconductor Devices and Integrated Circuits:714.2 ; Computer Peripheral Equipment:722.2 ; Light, Optics and Optical Devices:741 ; Nanotechnology:761 ; Quantum Theory; Quantum Mechanics:931.4 ; Crystalline Solids:933.1

Web of Science

1.Southern Univ Sci & Technol, Key Lab Energy Convers & Storage Technol, Minist Educ, Shenzhen 518055, Peoples R China
2.Southern Univ Sci & Technol, Guangdong Hong Kong Macao Joint Lab Photon Thermal, Shenzhen Key Lab Adv Quantum Dot Display & Lightin, Shenzhen 518055, Peoples R China
3.Southern Univ Sci & Technol, Dept Elect & Elect Engn, Shenzhen 518055, Peoples R China
4.Shenzhen Univ, Inst Microscale Optoelect, Shenzhen 518060, Peoples R China
5.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China

Liu, Wenbo,Jiang, Zhengyan,Liu, Pai,et al. Inorganic "Artificial Phase" CdSe/ZnS QDs Serve as the Host Material for White Emission Quasi-2D Perovskite Light Emitting Devices[J]. ADVANCED OPTICAL MATERIALS,2023,11.

Liu, Wenbo.,Jiang, Zhengyan.,Liu, Pai.,Wang, Kai.,Xu, Baomin.,...&Sun, Xiao Wei.(2023).Inorganic "Artificial Phase" CdSe/ZnS QDs Serve as the Host Material for White Emission Quasi-2D Perovskite Light Emitting Devices.ADVANCED OPTICAL MATERIALS,11.

Liu, Wenbo,et al."Inorganic "Artificial Phase" CdSe/ZnS QDs Serve as the Host Material for White Emission Quasi-2D Perovskite Light Emitting Devices".ADVANCED OPTICAL MATERIALS 11(2023).