VISIBLE LIGHT EMITTING DIODE FABRICATED FROM SOLUBLE SEMICONDUCTING POLYMER

摘要

PROBLEM TO BE SOLVED: To provide a visible light emitting diode fabricated from a soluble semiconducting polymer.;SOLUTION: A method of fabricating the light emitting diode emitting visible light and turned on at a voltage lower than 5V comprises (i) a process of precoating a substrate using a transparent conducting first layer having a high work function and acting as a hole discharge electrode, (ii) a process of casting a transparent layer formed of a soluble semiconducting luminescent conjugated polymer, directly from a solution onto the first layer, (iii) a process of forming an electron emission contact of metal with a low work function on the semiconducting conjugated polymer layer. The metal with the low work function is calcium, or metal or an alloy with the work function lower than calcium.;COPYRIGHT: (C)2004,JPO