Flexible photoelectric device substrate, flexible photoelectric device and preparation method

Abstract

The invention discloses a flexible photoelectric device substrate, a flexible photoelectric device and a preparation method. The flexible photoelectric device substrate comprises a glass baseplate and a metal thin film which is used for buffering expansion amount difference between a macromolecule thin film and the glass baseplate so that the macromolecule thin film can be prevented from falling off from the glass baseplate. The metal thin film is arranged on the edge area of the surface of the glass baseplate. The metal thin film is enclosed on the surface of the glass baseplate so that a panel forming area used for processing the flexible photoelectric device is formed. The flexible photoelectric device substrate is used for preparing the flexible photoelectric device. With application of the flexible photoelectric device substrate, the macromolecule thin film can be prevented from falling off from the glass baseplate. The flexible photoelectric device substrate provided by the invention is applicable to preparation of an OLED, OLED lighting, electronic paper display, a touch screen and other non-display technologies.

Description

technical field [0001] The invention relates to the field of preparation of flexible photoelectric devices, in particular to a flexible photoelectric device substrate, a flexible photoelectric device and a preparation method. Background technique [0002] Organic light-emitting devices (hereinafter referred to as OLED) are currently mainly used in the screens of small-sized smartphones below 5 inches, and are currently challenging large-sized screens above 10 inches. So far, the largest OLED screens produced by humans have reached more than 50 inches, such as: Samsung, LG's 55-inch and Sony's, Panasonic's 56-inch OLED TV. However, in the field of large-size display screens, LCD (liquid crystal display) is currently the mainstream product, because LCD is far better than OLED in terms of cost performance, making it difficult for OLED to enter the market. Flexible display is one of the main directions for the differentiation of OLED and LCD products. OLED is an active light-e...

AI Technical Summary

Problems solved by technology

This method has the following disadvantages in the following three aspects: 1. Difficulty in alignment during the production process; 2. There is residual glue after the plastic substrate is separated from the carrier; 3. The engineering temperature of the TFT-array (liquid crystal layer) is limited, which directly leads to TFT (thin film field effect transistor) device mobility is small

[0005] Through the above method, flexible optoelectronic devices can be produced on a production line with a small glass substrate, but due to the large difference in thermal expansion coefficient between the polymer film (>15ppm / °C) and the glass substrate (3ppm / °C), in TFT-array During the manufacturing process, after repeated temperature changes, the polymer film bulges, especially the phenomenon that the polymer film falls off around the substrate

In the process of TFT-array engineering, the substrate is repeatedly mixed with pure water, developer, various acids of etching series (such as nitric acid, acetic acid, phosphoric acid, etc.), stripping solution (60-70°C), diluent and other liquids. In contact with liquid medicine, it is difficult to ensure that the polymer film is always tightly adhered to the glass substrate during the entire engineering process

Once a gap occurs somewhere, the polymer film will be peeled from the glass substrate from the gap, and the polymer film may be completely peeled off from the glass substrate before the TFT-array process is completed, so it is difficult to mass-produce

This phenomenon is more likely to occur on large-sized glass substrates and is more serious

Due to the above reasons, although the industry has intensively and extensively studied flexible display technology, it has not yet achieved success in mass production.

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