TECHNOLOGY FOCUS - ELECTRONICS - Preferred Method: In the method (M2) before the step (a1), the method (M2) further comprises: providing a film material including an organic material; providing a first heat source to heat the film material; and providing a second heat source which is a hot air generator and/or an infrared heating device to facilitate evaporation of the organic solvent within the film material. In the method (M3) before the step (a2), the method (M3) further comprises: providing a substrate; providing a first heat source to heat the substrate; and disposing a film material on the substrate, where the film material includes an organic material, the first heat source is disposed under the substrate, and the first heat source heats the film material. In the method (M3): the film material is formed to be one of a hole-transport layer (3510) and an emitting layer after it is heated; the first carrier transport layer is formed by heating the film material by a second heat source, where the second heat source is hot air generator and/or an infrared heating device; the film material is heated by the first heat source and the second heat source for facilitating evaporation of the solvent; the second heat source is disposed above the substrate; and the first heat source has a temperature of 20-150 degrees C, and the second heat source has a temperature of 20-200 degrees C. Preferred Components: In the method (M3): the first carrier transport layer includes a first electron transport layer (3520), and the second carrier transport layer includes a second electron transport layer (3521), where the second electron transport layer is formed through heating by the first heat source and the second heat source; the first electron transport layer and the second electron transport layer have a first electron transport rate and a second electron transport rate respectively, and the second electron transport rate is higher than the first electron transport rate; and the first electron transport layer has an electron injection barrier, and the organic electronic component has a conduction voltage, where the second electron transport layer is used to decrease the electron injection barrier and the conduction voltage.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The organic solution includes a solvent, having high volatility, and the solvent is methanol, ethanol, acetone, formaldehyde and/or ethyl ether. In the method (M1), each of the first and the second organic solvents is formaldehyde and/or ethyl ether, and the first heating device heats the substrate to a constant temperature. EXAMPLE - No suitable example given.