Rigid organic opto-electronic device air tightness calibration method

Abstract

The invention discloses a calibration method of airtightness of rigid organic optoelectronic device, which includes the following steps: (1) arranging the organic optoelectronic device to be tested in an enclosed cavity; (2) regulating the pressure and components of the gas in the enclosed cavity according to the requirements for the calibration of the airtightness; (3) arranging the enclosed organic optoelectronic device in a vacuum cavity, filling the gas with the required components into the vacuum cavity, and regulating the gas pressure in the vacuum cavity, so that the pressure difference between the organic optoelectronic device and the vacuum cavity can simulate the working environment of the device; (4) arranging the organic optoelectronic device in the vacuum cavity for a certain period of time; (5) using a spectral analyzing instrument which is connected with the vacuum cavity to analyze the corresponding gas which leaks from the organic optoelectronic device into the vacuum cavity, so as to accurately calibrate the airtightness; (7) optimizing the structure of the device, the enclosing material and the enclosing technology according to the calibrated airtightness of different gases or components.

Description

technical field [0001] The invention relates to the technical field of organic optoelectronic devices in electronic components, and relates to a method for calibrating the airtightness of rigid organic optoelectronic devices. Background technique [0002] Organic optoelectronic devices, such as organic electroluminescent devices (OLEDs), photovoltaic cells and field effect transistors (OFETs), have now developed into multidisciplinary international frontier topics and the focus of high-tech competition. At present, one of the reasons hindering the mass production of organic optoelectronic devices is the high cost of improving their life and stability. The cost investment in this aspect is mainly used to prevent the devices from being affected by the intrusion of gases such as water vapor and oxygen. performance. The importance of device sealing (including packaging) and evaluation system is particularly prominent. However, no matter at home or abroad, the test methods and ...

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Problems solved by technology

[0003] Existing methods for measuring the airtightness of organic optoelectronic devices include weighing method (WVP method), calcium film corrosion method and sensor method. Although they are technically easier to implement and have higher sensitivity, they have obvious shortcomings: (1 ) can only measure water vapor permeability, and cannot measure other gases; (2) The measurement speed is slow; (3) It is impossible to measure the outgassing inside the device

[0005] However, when using mass spectrometry to measure and calibrate the impact of gas permeation on organic optoelectronic devices, how to analyze the permeability of different gases to different encapsulated organic optoelectronic devices, so as to aim at the impact of different gases on the performance of organic optoelectronic devices Affects to propose targeted improvement methods, not just limited to the study of the permeability of a certain gas (water vapor, oxygen, carbon dioxide, etc.) relative to a certain material and process

At the same time, the existing airtightness calibration methods are either quite difficult or lack practical operability for the sampling of one or several gases.

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