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Preparing method for organic white LED illumination light source with high color-rendering index and adjustable color temperature

A LED lighting and high color rendering technology, which is applied in semiconductor/solid-state device manufacturing, electrical components, electric solid-state devices, etc., can solve problems such as inability to achieve white light, poor heat dissipation, and uneven light output

Inactive Publication Date: 2013-03-27
江苏广发光电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this technology has several disadvantages that are difficult to overcome: complex production process, uneven light output, white light cannot be achieved if any LED lamp of the primary color fails, and poor heat dissipation, etc.

Method used

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  • Preparing method for organic white LED illumination light source with high color-rendering index and adjustable color temperature
  • Preparing method for organic white LED illumination light source with high color-rendering index and adjustable color temperature
  • Preparing method for organic white LED illumination light source with high color-rendering index and adjustable color temperature

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Embodiment Construction

[0035] An imitation embodiment of the present invention is described as follows with reference to the drawings:

[0036] See figure 2 As shown, the preparation method of the four-band high color rendering index white organic LED lighting source with adjustable color temperature is as follows:

[0037] a). Select an ITO glass substrate 1 that meets the required size and surface resistance, clean it with deionized water, and then use deionized water and alcohol for ultrasound respectively. The ultrasound time is 30min and 20min, respectively. After ultrasound, dry and treat with a UV-ozone cleaner. 15 minutes;

[0038] b) Using a vacuum evaporation method, the hole injection layer 2 and the hole transport layer 3 are prepared by evaporation on the ITO substrate 1 at a rate of 0.06-0.1 nm / s and a thickness of 40 nm and 10 nm, respectively.

[0039] c). Above the hole transport layer 3, the light-emitting layer 4 is prepared by a dual-source co-evaporation method. The light-emitting laye...

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Abstract

Disclosed is a preparing method for organic white LED illumination light source with high color-rendering index and adjustable color temperature. Four dyes, including blue, green, yellow and red dyes, are selected. Either two dyes are capable of forming into a complementary color. Blue and yellow dyes are mixed in a light-emitting layer of one host material while green and red dyes are mixed in a light-emitting layer of another host material. By utilizing a preparation of a blue fluorescent material collocating with green and red phosphor materials, the host materials of the two color-complementing light-emitting layers are consistent. The host material selected for the light-emitting layer close to a positive pole has good hole-transmission capability while the host material selected for the light-emitting layer close to a negative pole has good electronic transmission capacity. The host material selected by the blue and yellow light layers is of a hole type, while the host material selected by the green and red light layers is of an electronic type. Manufactured is a white illumination light source with high color-rendering index and adjustable color temperature. Specific technical parameters are provided for manufacturing the illumination light source with high color-rendering index and adjustable color temperature.

Description

Technical field [0001] The invention relates to a preparation method of a four-band high color rendering index white organic LED lighting source with adjustable color temperature. The emitted white light covers the four bands of blue, green, yellow and red, and the color rendering index can reach 90. With the adjustment of the voltage, the conversion from cold white light to warm white light can be realized. Background technique [0002] Since Edison invented the incandescent lamp in 1879, various lighting products have come out one after another. At present, the main white lighting products on the market are: incandescent lamps, fluorescent lamps, light-emitting diodes, etc. In recent years, light-emitting diode or solid-state lighting technology has developed rapidly. This technology can be divided into two categories, one is LED technology, and the other is organic light-emitting diode (Organic light-emitting diode) technology. [0003] Incandescent lamps are facing the situat...

Claims

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Application Information

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IPC IPC(8): H01L51/56
Inventor 于建宁张民艳尚玉柱吕燕芳
Owner 江苏广发光电科技有限公司
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