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Alcohol soluble material in poly-fluorene group containing phosphate group in use for luminescent material

A phosphate group and phosphate-containing technology, which is applied in the field of optoelectronic materials and information, can solve the problems of device aging and cannot fundamentally solve aging, and achieve high current efficiency, simple preparation method, and high spectral stability.

Active Publication Date: 2006-09-06
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In order to solve this problem, researchers have done a lot of research work. One of the main methods is to use calcium metal with low work function as the electrode to reduce the injection barrier. However, although the calcium electrode is surrounded by metal aluminum, it is still very easy to It reacts with oxygen and moisture in the air, causing the aging of the device. Although the packaging can slow down the aging, it still cannot fundamentally solve the aging
Another method is to evaporate a layer of inorganic salt, such as lithium fluoride or cesium fluoride, and then protect it with metal aluminum. center, and evaporation also brings difficulty and cost of device preparation

Method used

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  • Alcohol soluble material in poly-fluorene group containing phosphate group in use for luminescent material
  • Alcohol soluble material in poly-fluorene group containing phosphate group in use for luminescent material
  • Alcohol soluble material in poly-fluorene group containing phosphate group in use for luminescent material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1: the application of poly[2,7-dibromo-9,9-(3'-phosphoethoxypropyl)fluorene]

[0016] The basic structure of an electroluminescent (EL) device is as shown in Figure 1. The specific structure of this embodiment is: ITO / PEDOT / Polymer / Ca / Al, and its preparation process is: using pre-cleaned ITO (indium tin oxide ) glass as the anode, and then a layer of conductive polymer-polythiophene derivative (PEDOT) (50nm) was spin-coated at a speed of 3000 rpm. A chloroform solution of poly[2,7-dibromo-9,9-(3'-phosphoethoxypropyl)fluorene] (Polymer) with a concentration of 10 mg / mL was spin-coated on ITO at a speed of 1500 rpm. surface. Subsequently, 10nm of metallic calcium and 100nm of metallic aluminum were sequentially vapor-deposited under the condition of a vacuum degree of 10-3Pa. The performance of the single-layer electroluminescent device is as follows: start-up voltage 6.0V, maximum brightness 901cd / m 2 , the brightness is 100cd / m 2 The electroluminescence e...

Embodiment 2

[0017] Embodiment 2: the application of poly[2,7-dibromo-9,9-(3'-phosphoethoxypropyl)fluorene]

[0018] The basic structure of an electroluminescent (EL) device is as shown in Figure 1. The specific structure of this embodiment is: ITO / PEDOT / Polymer / Ca / Al, and its preparation process is: using pre-cleaned ITO (indium tin oxide ) glass as the anode, and then spin-coat a layer of conductive polymer-polythiophene derivative (PEDOT) (45nm) at a speed of 3000 rpm. A chloroform solution of 10 mg / mL poly[2,7-dibromo-9,9-(3'-phosphoethoxypropyl)fluorene] (Polymer) was spin-coated on the ITO surface at a rotational speed of 1500 rpm. Subsequently, at 9×10 -4 Under Pa vacuum condition, 100° C. is treated for one hour, and after cooling, 10 nm of metallic calcium and 100 nm of metallic aluminum are sequentially vapor-deposited. The performance of the single-layer electroluminescent device is as follows: start-up voltage 5.0V, maximum brightness 1279cd / m 2 , the brightness is 100cd / m ...

Embodiment 3

[0019] Embodiment 3: the application of poly[2,7-dibromo-9,9-(3'-phosphoethoxypropyl)fluorene]

[0020] The basic structure of an electroluminescent (EL) device is as shown in Figure 1. The specific structure of this embodiment is: ITO / PEDOT / Polymer / Ca / Al, and its preparation process is: using pre-cleaned ITO (indium tin oxide ) glass as the anode, and then spin-coat a layer of conductive polymer-polythiophene derivative (PEDOT) (55nm) at a speed of 3000 rpm. A 10 mg / mL ethanol solution of poly[2,7-dibromo-9,9-(3'-phosphoethoxypropyl)fluorene] (Polymer) was spin-coated on the ITO surface at a rotational speed of 1500 rpm. Subsequently, at 4×10 -4 Under the vacuum condition of Pa, metal calcium of 10 nm and metal aluminum of 100 nm are successively vapor-deposited. The performance of the single-layer electroluminescent device is as follows: start-up voltage 4.5V, maximum brightness 520cd / m 2 , the brightness is 100cd / m 2 The electroluminescent efficiency is 0.10cd / A, and th...

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Abstract

An alcohol-soluble polyfluorene material containing phosphate radicals is disclosed, which can be used as the luminescent material of electroluminescent device, flat display and fluorescent senor. Its advantages are high brightness, high efficiency, low power consumption, and low environmental pollution.

Description

technical field [0001] The invention belongs to the field of optoelectronic materials and information technology, and relates to the application of alcohol-soluble polyfluorene polymer materials containing phosphate groups as light-emitting materials in electroluminescent devices and fluorescent sensors. technical background [0002] Since Friend et al first reported polymer electroluminescent devices in 1990, this field has developed rapidly, and its most important application, flat panel display, has also been commercialized. For electroluminescent devices, the balanced injection and effective transport of electrons and holes are the basic conditions for obtaining high-efficiency luminescence, but the known polymer materials are basically p-type semiconductor materials, and n-type is rarely reported, so , the electron injection barrier is larger and the transport mobility is lower. In order to solve this problem, researchers have done a lot of research work. One of the ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G61/12C09K11/06H01L33/00G01N21/64H01L51/54
Inventor 王利祥周刚钱钢程延祥谢志元
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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