Method for thermally evaporating and preparing organic material nanometer cluster

Abstract

The invention relates to a method for evaporating and preparing an organic light emitting device by utilizing a cluster, which comprises the following steps: arranging a boron nitride crucible (3) in a vacuum chamber (5) as a nanometer cluster film preparation device, firstly, compressing air to be in a superhigh vacuum state of 5*10<5> Pa by using the film preparation device during the preparation process of an organic material nanometer cluster film and leading a resistance wire on the boron nitride crucible to switch on a current source (4) to heat the boron nitride crucible; then, leading the current of the current source to be 22-25 amperes during the evaporation process; gradually increasing the pressure intensity in the crucible during the heating and ceaselessly accumulating material steam inside the boron nitride crucible; and finally, quickly spraying high-temperature gaseous materials through a small hole (1) and absorbing the high-temperature gaseous materials to a base plate (2). The temperature of the base plate (2) is at a room temperature during the whole process. The film has strong adhesion, stable performance and high aggregation density. The device prepared by adopting the method has long service life, the photoelectric property of the device is improved remarkably and the luminous efficiency and the brightness of the device are also improved.

Description

technical field [0001] The invention provides a method for preparing a thin film with stable thermal and electrical properties, which is mainly used for preparing semiconductor and organic optical thin films, and particularly relates to the field of organic light-emitting display devices. Background technique [0002] Compared with organic small molecules, polymers have unique advantages such as good electrothermal stability and machinability, simple molding and processing, easy to realize functional integration, and easy to make large-area multi-color flat panel displays, but the disadvantage is that the charge carriers after film formation The transmission capability is poor and the device efficiency is not high. In order to balance the number of carriers and improve luminous efficiency, people use composite organic functional layer structure to obtain excellent device performance. [0003] However, in order to realize the industrialization of organic light-emitting, the ...

AI Technical Summary

Problems solved by technology

If the device packaging is not good, the organic material will react with water vapor, oxygen and other gases, resulting in device failure and reducing the life of the organic light-emitting device. The existing packaging technology is to use desiccant plus glass packaging or polymer film packaging , there are disadvantages such as low vacuum degree and complicated process

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