Polymer Light-Emitting Electrochemical Cells for High-Efficiency Low-Voltage Electroluminescent Devices

Light-emitting electrochemical cells (LECs) are solution-processable thin-film electroluminescent devices consisting of a luminescent material in an ionic environment. The simplest type of LEC is based on only one material, ionic transition-metal complexes (iTMCs). These materials are of interest for different scientific fields such as chemistry, physics, and technology as selected chemical modifications of iTMCs resulted in crucial breakthroughs for the performance of LECs. This short review highlights the different strategies used to design these compounds with the aim to enhance the performances of LECs.

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Yellow-green light-emitting electrochemical cells with long lifetime and high efficiency

Applied Physics Letters ◽

10.1063/1.3299018 ◽

2010 ◽

Vol 96 (5) ◽

pp. 053303 ◽

Cited By ~ 56

Author(s):

Andreas Sandström ◽

Piotr Matyba ◽

Ludvig Edman

Keyword(s):

High Efficiency ◽

Green Light ◽

Electrochemical Cells ◽

Light Emitting ◽

Long Lifetime

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Light-Emitting Electrochemical Cells with Millimeter-Sized Interelectrode Gap: Low-Voltage Operation at Room Temperature

Journal of the American Chemical Society ◽

10.1021/ja0657051 ◽

2006 ◽

Vol 128 (49) ◽

pp. 15568-15569 ◽

Cited By ~ 38

Author(s):

Joon-Ho Shin ◽

Ludvig Edman

Keyword(s):

Room Temperature ◽

Low Voltage ◽

Electrochemical Cells ◽

Light Emitting ◽

Low Voltage Operation ◽

Interelectrode Gap

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Driving and Application of Blue Light Organic Light Emitting Devices

Nanoscience and Nanotechnology Letters ◽

10.1166/nnl.2019.2932 ◽

2019 ◽

Vol 11 (5) ◽

pp. 711-717

Author(s):

Hongbo Liu ◽

Minghui Liu ◽

Lin Cong ◽

Lizhong Wang ◽

Tao Huang ◽

...

Keyword(s):

Blue Light ◽

High Efficiency ◽

Low Voltage ◽

Red Light ◽

Portable Devices ◽

Driving Voltage ◽

Light Emitting ◽

Light Emitting Devices ◽

Organic Light ◽

Organic Light Emitting Devices

The DPVBi (4,4′-bis(2,2-diphenylvinyl-1,1′-biphenyl) is a blue-light organic fluorescence doped material, which can be used as a hole barrier layer or a luminescent layer for fabricating organic light-emitting devices. A blue light device with stable color stability and high efficiency was prepared by co-doping blue light dye DPVBi and red light dye DCJTB as light-emitting layer. In order to prevent the infiltration of O2 and moisture inside the device from affecting the luminescence lifetime of the device, the device was encapsulated by atomic layer deposition. Since the driving voltage of the organic light-emitting device is generally above 5 V and the power consumption is low, in order to facilitate driving with a low voltage, a boost driving circuit based on the XL6009 chip was designed. The driver of the fabricated blue-light device was tested. The results showed that circuit had low-voltage drive characteristics and could be widely used in small toys, lighting, and portable devices. Through the test to achieve the desired goal, the requirements of low voltage and low energy consumption were realized, and the life of the light-emitting device can be tested, which has certain practicability and reference value.

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