1. An information processing device having neural network functions for performing information processing comprising: a semiconductor integrated circuit section having a surface and including a plurality of neuronic circuit regions having a neuronic function which is one of said neural network functions formed in said surface; first molecular film means on said integrated circuit section surface, said first molecular film means comprising at least one first wiring line, a photoelectric material contacting a first portion of said first wiring line, and at least one second wiring line having a first portion contacting said photoelectric material, said first portion of said first wiring line, said first portion of said second wiring line, and said photoelectric material defining a junction; a transparent insulating film on said first molecular film means; and second molecular film means having a light-emitting function on said transparent insulating film, said second molecular film means positioned so as to illuminate at least one junction so as to electrically interconnect said first and second wiring lines; wherein coupling between said plurality of neuronic circuit regions occurs through a combination of the light-emitting and photoelectric functions of said first and said second molecular film means.