Patent ID: 6338977
Filing Date: 2002-01-15
Classification: H01L,Y02E

Abstract:
A method of fabricating an molecular light emitting diode that changes colors as a function of analyte vapors, said method comprising:(a) forming a first electrode; (b) forming a hole transport layer on said first electrode; (c) forming a sensing layer on said hole transport layer, said sensing layer consisting essentially of a homogeneous crystalline organic complex material that changes color from a first color to a second color upon exposure to said analyte vapors and is reversible back to said first color upon removal of said analyte vapors or upon exposure of said sensing/emitting layer to a different analyte; (d) forming an electron conductor layer on said sensing/emitting layer; and (e) forming a second electrode on said electron conductor layer, wherein said hole transport layer emits light at a shorter wavelength than said sensing layer and wherein at least said fist electrode comprises an optically transparent material.