The invention first relates to a method for depositing a layer consisting of an organic starting substance onto a substrate (11), wherein the organic starting substance is introduced into an evaporator (1) as an aerosol in the form of suspended particles in a carrier gas stream, wherein the suspended particles come into contact with a heat transfer face (15) there, which transfer face is heated by a temperature control system, and evaporate after an average dwell time, which also depends on the temperature of the heat transfer face (15), wherein the vapour thus produced from the carrier gas is brought as an output gas stream out of the evaporator (1) into the process chamber (10), where said vapour condenses onto the surface of the substrate (11) and forms the layer.; To reduce the chronological variation rates of vapour produced by evaporating an aerosol, according to the invention the temperature of the heat transfer face (15) is varied in response to a chronological change in the mass flow of the produced vapour (c) in the output gas stream. Furthermore, the invention relates to a device for evaporating organic suspended particles transported in a carrier gas stream, and to a device for depositing OLEDs.