NOVELTY - Fabricating an organic light emitting device (100), comprises: providing an electrode; depositing a first organic layer in contact with the electrode by a solution process, where the first organic layer comprises an organic electron acceptor, and an organic electron donor; and heating the first organic layer to form a layer that is insoluble in a non-polar solvent.    USE - The first device is useful as consumer product, where the device is organic light emitting device (all claimed), and the consumer product comprises panel displays, computer monitors, televisions, billboards, lights for interior or exterior illumination and/or signaling, heads up displays, fully transparent displays, flexible displays, laser printers, telephones, cell phones, personal digital assistants, laptop computers, digital cameras, camcorders, viewfinders, micro-displays, vehicles, a large area wall, theater or stadium screen, or a sign. The organic light emitting device is useful as optoelectronic devices such as organic solar cells and organic photodetectors.    ADVANTAGE - The device has improved properties including longer lifetime, good reproducibility, lower operating voltage while maintaining luminous efficiency, and improved purification.    DETAILED DESCRIPTION - Fabricating an organic light emitting device (100), comprises: providing an electrode; depositing a first organic layer in contact with the electrode by a solution process, where the first organic layer comprises an organic electron acceptor, and an organic electron donor has of formula (I); and heating the first organic layer to form a layer that is insoluble in a non-polar solvent.    A-C = 5 or 6 membered cyclic or heterocyclic rings;    RA-RC = H, halo, alkyl, alkoxy, amino, alkenyl, alkynyl or (hetero)aryl, where RA-RC are optionally fused to A, B, and C, and at least two of RA-RC has of amine group of formula (II);    X, Y1 = A; and    RX, RY1 = RA, where RX and RY1 are optionally fused to X and Y1, and RX and RY1 are optionally connected to A and B.    An INDEPENDENT CLAIM is included for a first device comprising: an organic light emitting device, an anode (115), a cathode (160), and a first organic layer disposed between the anode and the cathode, where the first organic layer comprises an organic electron acceptor, and the organic electron donor, and the organic electron acceptor and the organic electron donor form an insoluble organic layer when the composition is heated.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of an organic light emitting device.    Organic light emitting device (100)    Anode (115)    Hole transport layer (125)    Electron blocking layer (130)    Cathode. (160)