Impedance spectroscopy for quantum dot light-emitting diodes

Qu, Xiangwei1,2,3,4; Sun, Xiaowei1,2,3,4

2023-09-01

10.1088/1674-4926/44/9/091603

JOURNAL OF SEMICONDUCTORS   影响因子和分区

1674-4926

Impedance spectroscopy has been increasingly employed in quantum dot light-emitting diodes (QLEDs) to investigate the charge dynamics and device physics. In this review, we introduce the mathematical basics of impedance spectroscopy that applied to QLEDs. In particular, we focus on the Nyquist plot, Mott-Schottky analysis, capacitance-frequency and capacitance-voltage characteristics, and the dC/dV measurement of the QLEDs. These impedance measurements can provide critical information on electrical parameters such as equivalent circuit models, characteristic time constants, charge injection and recombination points, and trap distribution of the QLEDs. However, this paper will also discuss the disadvantages and limitations of these measurements. Fundamentally, this review provides a deeper understanding of the device physics of QLEDs through the application of impedance spectroscopy, offering valuable insights into the analysis of performance loss and degradation mechanisms of QLEDs.

quantum dot light-emitting diode impedance spectroscopy equivalent circuit model charge dynamics

ESCI ; EI

英语

第一 ; 通讯

National Key Research and Development Program of China["2021YFB3602703","2022YFB3606504","2022YFB3602903"] ; Shenzhen Key Laboratory for Advanced Quantum Dot Displays and Lighting[ZDSYS201707281632549] ; Shenzhen Science and Technology Program[JCYJ20220818100411025]

Physics

Physics, Condensed Matter

WOS:001074191800001

IOP Publishing Ltd

20234314960885

Circuit simulation ; Degradation ; Equivalent circuits ; Nanocrystals ; Organic light emitting diodes (OLED) ; Semiconductor quantum dots ; Spectrum analysis ; Timing circuits

Electricity: Basic Concepts and Phenomena:701.1 ; Electric Network Analysis:703.1.1 ; Pulse Circuits:713.4 ; Semiconductor Devices and Integrated Circuits:714.2 ; Nanotechnology:761 ; Chemical Reactions:802.2 ; Crystalline Solids:933.1

Web of Science

1.Southern Univ Sci & Technol, Inst Nanosci & Applicat, Shenzhen 518055, Peoples R China
2.Southern Univ Sci & Technol, Dept Elect & Elect Engn, Shenzhen 518055, Peoples R China
3.Southern Univ Sci & Technol, Key Lab Energy Convers & Storage Technol, Minist Educ, Shenzhen 518055, Peoples R China
4.Southern Univ Sci & Technol, Shenzhen Key Lab Adv Quantum Dot Displays & Lighti, Shenzhen 518055, Peoples R China

Qu, Xiangwei,Sun, Xiaowei. Impedance spectroscopy for quantum dot light-emitting diodes[J]. JOURNAL OF SEMICONDUCTORS,2023,44(9).

Qu, Xiangwei,&Sun, Xiaowei.(2023).Impedance spectroscopy for quantum dot light-emitting diodes.JOURNAL OF SEMICONDUCTORS,44(9).

Qu, Xiangwei,et al."Impedance spectroscopy for quantum dot light-emitting diodes".JOURNAL OF SEMICONDUCTORS 44.9(2023).