Organic semiconductor devices and organic electroluminescent...

Details Organic semiconductor devices and organic electroluminescent... Organic semiconductor devices and organic electroluminescent...

2006-03-08

2010-02-23

Mulpuri, Savitri (Department: 2812)

Semiconductor device manufacturing: process

Making device or circuit emissive of nonelectrical signal

C438S099000

Reexamination Certificate

active

07666691

ABSTRACT:
The present invention provides a method for manufacturing an organic semiconductor thin film by a wet process with a composite solution prepared by dissolving at least two organic semiconductor compounds in a mixed organic solvent including at least two organic solvents having different volatility and having different solubilities of the organic compounds at room temperature. Due to the differences in the evaporation speeds of the solvents and the solubilities of the organic compounds, the organic compounds are continuously deposited according to the composition of solvent that sequentially evaporates. Thus, the organic semiconductor thin film having a continuous multi-layer (non-boundary multi-layer) structure can be manufactured where different organic compounds coexist between the organic layers. Especially, the composite solution including at least two organic EL materials are used, and the organic materials are controlled to deposit on the anode in the order of hole injecting—hole transporting—light emitting—electron transporting—electron injecting layers to form an organic EL device.

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