Patent ID: 11411182

Abstract:
A mixed powder for an organic electroluminescence device, including a first organic compound and a different second organic compound, wherein the mixed powder is solid at normal temperature and pressure, and the following formulas (1) and (2) are satisfied: 0<MOL2/(MOL1+MOL2)≤0.2 . . . (1) and −20° C.≤T1−T2≤40° C. . . . (2), wherein MOL1 [mol %] is a molar concentration of the first organic compound, MOL2 [mol %] is a molar concentration of the second organic compoundb, T1 [° C.] is a temperature of the first organic compound when P1/M11/2=0.04×{MOL1/(MOL1+MOL2)} is satisfied, T2 [° C.] is a temperature of the second organic compound when P2/M21/2=0.04×{MOL2/(MOL1+MOL2)} is satisfied, M1 [kg/mol] is the molecular weight of the first organic compound, P1 [Pa] is a vapor pressure of the first organic compound, M2 [kg/mol] is the molecular weight of the second organic compound, P2 [Pa] is a vapor pressure of the second organic compound.