Realizing White Emission of Single-Layer Dual-Color Perovskite Light-Emitting Devices by Modulating the Electroluminescence Emission Spectra

Liu, Wenbo1,2,3,4; Jiang, Zhengyan4; Fan, Weijun5; Zhang, Qichun6; Sun, Xiao Wei2,3,4

2021-10-21

10.1021/acs.jpclett.1c02599

Journal of Physical Chemistry Letters   影响因子和分区

1948-7185

Dual-color emission in a single perovskite layer would make perovskite light-emitting devices (PLEDs) more competitive compared with other display technologies. However, due to the carrier dynamics in a blended perovskite film and the low reaction activation energy of the halide exchange reaction, it is very difficult to achieve the dual-color emission in a perovskite layer. Here, dual-color electroluminescence (EL) emission in a single perovskite layer has been realized by slowing the energy transfer from wide-bandgap energy levels to narrow-bandgap energy levels. Moreover, the EL spectra can be controlled by modulating the composition of the perovskite layer. When the amount of CH3NH3I(MAI) in the precursor was varied, white emission with CIE coordinates of (0.33, 0.34) could be achieved. Our work proposes a new strategy for white emission from PLEDs. Also, the analysis and discussion of carrier dynamics in this work may help to enhance our understanding of the working mechanism of PLEDs.

SCI ; EI

英语

NI论文

通讯

Ministry of Science and Technology of China[2016YFB0401702] ; National Natural Science Foundation of China[61674074,61875082,61405089,62005115] ; Key-Area Research and Development Program of Guangdong Province["2019B010925001","2019B010924001"] ; Shenzhen Key Laboratory for Advanced Quantum Dot Displays and Lighting[ZDSYS201707281632549] ; Shenzhen Peacock Team Project[KQTD2016030111203005]

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

Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Atomic, Molecular & Chemical

WOS:000711025300027

AMER CHEMICAL SOC

20214411096006

Activation energy ; Color ; Display devices ; Electroluminescence ; Emission spectroscopy ; Energy gap ; Energy transfer ; Light ; Organic light emitting diodes (OLED) ; Perovskite

Minerals:482.2 ; Electricity: Basic Concepts and Phenomena:701.1 ; Semiconductor Devices and Integrated Circuits:714.2 ; Computer Peripheral Equipment:722.2 ; Light, Optics and Optical Devices:741 ; Light/Optics:741.1

Web of Science

1.Shenzhen Univ, Inst Microscale Optoelect, Shenzhen 518060, Peoples R China
2.Southern Univ Sci & Technol, Guangdong Univ Key Lab Adv Quantum Dot Displays &, Guangdong Hong Kong Macao Joint Lab Photon Therma, Shenzhen 518055, Peoples R China
3.Southern Univ Sci & Technol, Dept Elect & Elect Engn, Shenzhen 518055, Peoples R China
4.Southern Univ Sci & Technol, Minist Educ, Key Lab Energy Convers & Storage Technol, Shenzhen 518055, Peoples R China
5.Nanyang Technol Univ, Sch Elect & Elect Engn, Singapore 639798, Singapore
6.City Univ Hong Kong, Dept Mat Sci & Engn, Kowloon, Hong Kong, Peoples R China

Liu, Wenbo,Jiang, Zhengyan,Fan, Weijun,et al. Realizing White Emission of Single-Layer Dual-Color Perovskite Light-Emitting Devices by Modulating the Electroluminescence Emission Spectra[J]. Journal of Physical Chemistry Letters,2021,12(41):10197-10203.

Liu, Wenbo,Jiang, Zhengyan,Fan, Weijun,Zhang, Qichun,&Sun, Xiao Wei.(2021).Realizing White Emission of Single-Layer Dual-Color Perovskite Light-Emitting Devices by Modulating the Electroluminescence Emission Spectra.Journal of Physical Chemistry Letters,12(41),10197-10203.

Liu, Wenbo,et al."Realizing White Emission of Single-Layer Dual-Color Perovskite Light-Emitting Devices by Modulating the Electroluminescence Emission Spectra".Journal of Physical Chemistry Letters 12.41(2021):10197-10203.