Mixed powder for an organic electroluminescence device and method for producing the same, method for fabricating organic electroluminescence device by using the mixed powder, method for selecting compounds in the mixed powder, and composition for vacuum deposition

9:

• The mixed powder according to claim 8, wherein the following formula is satisfied:
• 0.2
• ≦
• MOL
• ⁢
• 2
• /
• (
• MOL
• ⁢
• 1
• +
• MOL
• ⁢
• 2
• )
• ≦
• 0.45
• .

10:

• The mixed powder according to claim 8, wherein the following formula is satisfied:
• 0.2
• ≦
• MOL
• ⁢
• 2
• /
• (
• MOL
• ⁢
• 1
• +
• MOL
• ⁢
• 2
• )
• ≦
• 0.4
• .

11:

• The mixed powder according to claim 8, wherein the following formula is satisfied:
• 0.2
• ≦
• MOL
• ⁢
• 2
• /
• (
• MOL
• ⁢
• 1
• +
• MOL
• ⁢
• 2
• )
• ≦
• 0.35
• .

12:

• The mixed powder according to claim 8, wherein the following formula is satisfied:
• 0.2
• ≦
• MOL
• ⁢
• 2
• /
• (
• MOL
• ⁢
• 1
• +
• MOL
• ⁢
• 2
• )
• ≦
• 0.3
• .

14:

• The mixed powder according to claim 13, wherein the following formula is satisfied:
• 0
• <
• MOL
• ⁢
• 2
• /
• (
• MOL
• ⁢
• 1
• +
• MOL
• ⁢
• 2
• )
• ≦
• 0.2
• .

15:

• The mixed powder according to claim 13, wherein the following formula is satisfied:
• 0
• <
• MOL
• ⁢
• 2
• /
• (
• MOL
• ⁢
• 1
• +
• MOL
• ⁢
• 2
• )
• ≦
• 0.15
• .

16:

• The mixed powder according to claim 13, wherein the following formula is satisfied:
• 0
• <
• MOL
• ⁢
• 2
• /
• (
• MOL
• ⁢
• 1
• +
• MOL
• ⁢
• 2
• )
• ≦
• 0
• .
• 1
• ⁢
• 0
• .

17:

• The mixed powder according to claim 13, wherein the following formula is satisfied:
• 0
• <
• MOL
• ⁢
• 2
• /
• (
• MOL
• ⁢
• 1
• +
• MOL
• ⁢
• 2
• )
• ≦
• 0
• .
• 0
• ⁢
• 5
• .

19:

• The mixed powder according to claim 18, wherein the following formula is satisfied:
• 0
• <
• MOL
• ⁢
• 2
• /
• (
• MOL
• ⁢
• 1
• +
• MOL
• ⁢
• 2
• )
• ≦
• 0.2
• .

20:

• The mixed powder according to claim 18, wherein the following formula is satisfied:
• 0
• <
• MOL
• ⁢
• 2
• /
• (
• MOL
• ⁢
• 1
• +
• MOL
• ⁢
• 2
• )
• ≦
• 0
• .
• 1
• ⁢
• 5
• .

21:

• The mixed powder according to claim 18, wherein the following formula is satisfied:
• 0
• <
• MOL
• ⁢
• 2
• /
• (
• MOL
• ⁢
• 1
• +
• MOL
• ⁢
• 2
• )
• ≦
• 0
• .
• 1
• ⁢
• 0
• .

22:

• The mixed powder according to claim 18, wherein the following formula is satisfied:
• 0
• <
• MOL
• ⁢
• 2
• /
• (
• MOL
• ⁢
• 1
• +
• MOL
• ⁢
• 2
• )
• ≦
• 0
• .
• 0
• ⁢
• 5
• .

24:

• The mixed powder according to claim 23, wherein the following formula is satisfied:
• 0
• .
• 2
• ⁢
• 0
• ≦
• MOL
• ⁢
• 2
• /
• (
• MOL
• ⁢
• 1
• +
• MOL
• ⁢
• 2
• )
• ≦
• 0
• .
• 4
• ⁢
• 5
• .

25:

• The mixed powder according to claim 23, wherein the following formula is satisfied:
• 0
• .
• 2
• ⁢
• 0
• ≦
• MOL
• ⁢
• 2
• /
• (
• MOL
• ⁢
• 1
• +
• MOL
• ⁢
• 2
• )
• ≦
• 0
• .
• 4
• ⁢
• 0
• .

26:

• The mixed powder according to claim 23, wherein the following formula is satisfied:
• 0
• .
• 2
• ⁢
• 0
• ≦
• MOL
• ⁢
• 2
• /
• (
• MOL
• ⁢
• 1
• +
• MOL
• ⁢
• 2
• )
• ≦
• 0
• .
• 3
• ⁢
• 5
• .

27:

• The mixed powder according to claim 23, wherein the following formula is satisfied:
• 0
• .
• 2
• ⁢
• 0
• ≦
• MOL
• ⁢
• 2
• /
• (
• MOL
• ⁢
• 1
• +
• MOL
• ⁢
• 2
• )
• ≦
• 0
• .
• 3
• ⁢
• 0
• .

28:

• The mixed powder according to claim 1, wherein T1 and T2 satisfy the following formula:
• -
• 20
• ⁢
• °
• ⁢
• C
• .
• ≦
• T
• ⁢
• 1
• -
• T
• ⁢
• 2
• ≦
• 20
• ⁢
• °
• ⁢
• C
• .

32:

• A method for fabricating an organic electroluminescence device, wherein the organic electroluminescence device comprises a cathode, an anode, and an emitting layer arranged between the cathode and the anode, and comprising a compound C2 having delayed fluorescence, and
• the method comprises:
• depositing a mixed powder or a mixture obtained by heating and melting the mixed powder and by solidifying it, by heating and vaporizing the mixed powder or the mixture in a deposition source to form the emitting layer,
• wherein the mixed powder comprises a first organic compound and a second organic compound, and is solid at ordinary temperatures and pressures,
• each of the first organic compound and the second organic compound is a compound selected from the group consisting of a fluorescent emitting compound C1, the compound C2, and a compound C3 different from both the compound C1 and the compound C2,
• wherein the first organic compound is the compound C3, and the second organic compound is the compound C2,
• the first organic compound is the compound C3, and the second organic compound is the compound C1,
• the first organic compound is the compound C2, and the second organic compound is the compound C1, or
• the first organic compound is the compound C2, and the second organic compound is the compound C3,
• wherein when MOL1 [mol %] is used as the molar concentration of the first organic compound in the mixed powder, and
• when MOL2 [mol %] is used as the molar concentration of the second organic compound in the mixed powder,
• MOL1 [mol %] and MOL2 [mol %] satisfy the following formula (1),
• wherein when M1 [kg/mol] is used as the molecular weight of the first organic compound,
• when P1 [Pa] is used as the vapor pressure obtained by ThermoGravimetry-Differential Thermal Analysis of the first organic compound at arbitrary temperature,
• when M2 [kg/mol] is used as the molecular weight of the second organic compound, and
• when P2 [Pa] is used as the vapor pressure obtained by ThermoGravimetry-Differential Thermal Analysis of the second organic compound at arbitrary temperature,
• the temperature T1 [° C.] of the first organic compound in the case of P1/M1/2=0.04×{MOL1/(MOL1+MOL2)} and
• the temperature T2 [° C.] of the second organic compound in the case of P2/M1/2=0.04×{MOL2/(MOL1+MOL2)} satisfy the following formula (2):
• 0
• <
• MOL
• ⁢
• 2
• /
• (
• MOL
• ⁢
• 1
• +
• MOL
• ⁢
• 2
• )
• ≦
• 0
• .45
• (
• 1
• )
• -
• 20
• ⁢
• °
• ⁢
• C
• .
• ≦
• T
• ⁢
• 1
• -
• T
• ⁢
• 2
• ≦
• 40
• ⁢
• °
• ⁢
• C
• .
• (
• 2
• )
• .

34:

• A method for selecting a first organic compound and a second organic compound in a mixed powder for an organic electroluminescence device, which comprises the first organic compound and the second organic compound and which is solid at ordinary temperatures and pressures,
• wherein the organic electroluminescence device comprises a cathode, an anode, and an emitting layer arranged between the cathode and the anode, and comprising a compound C2 having delayed fluorescence, and
• each of the first organic compound and the second organic compound is a compound selected from the group consisting of a fluorescent emitting compound C1, the compound C2, and a compound C3 different from both the compound C1 and the compound C2,
• wherein the first organic compound is the compound C3, and the second organic compound is the compound C2,
• the first organic compound is the compound C3, and the second organic compound is the compound C1,
• the first organic compound is the compound C2, and the second organic compound is the compound C1, or
• the first organic compound is the compound C2, and the second organic compound is the compound C3,
• wherein when MOL1 [mol %] is used as the molar concentration of the first organic compound in the mixed powder, and
• when MOL2 [mol %] is used as the molar concentration of the second organic compound in the mixed powder,
• MOL1 [mol %] and MOL2 [mol %] satisfy the following formula (1),
• wherein when M1 [kg/mol] is used as the molecular weight of the first organic compound,
• when P1 [Pa] is used as the vapor pressure obtained by ThermoGravimetry-Differential Thermal Analysis of the first organic compound at arbitrary temperature,
• when M2 [kg/mol] is used as the molecular weight of the second organic compound, and when P2 [Pa] is used as the vapor pressure obtained by ThermoGravimetry-Differential Thermal Analysis of the second organic compound at arbitrary temperature,
• the first organic compound and the second organic compound are selected so that the temperature T1 [° C.] of the first organic compound in the case of P1/M1/2=0.04×{MOL1/(MOL1+MOL2)} and
• the temperature T2 [° C.] of the second organic compound in the case of P2/M1/2=0.04×{MOL2/(MOL1+MOL2)} satisfy the following formula (2):
• 0
• <
• MOL
• ⁢
• 2
• /
• (
• MOL
• ⁢
• 1
• +
• MOL
• ⁢
• 2
• )
• ≦
• 0
• .45
• (
• 1
• )
• -
• 20
• ⁢
• °
• ⁢
• C
• .
• ≦
• T
• ⁢
• 1
• -
• T
• ⁢
• 2
• ≦
• 40
• ⁢
• °
• ⁢
• C
• .
• (
• 2
• )
• .

36:

• A method for producing a mixed powder for an organic electroluminescence device, comprising a first organic compound and a second organic compound, and being solid at ordinary temperatures and pressures,
• wherein the organic electroluminescence device comprises a cathode, an anode, and an emitting layer arranged between the cathode and the anode, and comprising a compound C2 having delayed fluorescence, and
• each of the first organic compound and the second organic compound is a compound selected from the group consisting of a fluorescent emitting compound C1, the compound C2, and a compound C3 different from both the compound C1 and the compound C2,
• wherein the first organic compound is the compound C3, and the second organic compound is the compound C2,
• the first organic compound is the compound C3, and the second organic compound is the compound C1,
• the first organic compound is the compound C2, and the second organic compound is the compound C1, or
• the first organic compound is the compound C2, and the second organic compound is the compound C3,
• wherein when MOL1 [mol %] is used as the molar concentration of the first organic compound in the mixed powder, and
• when MOL2 [mol %] is used as the molar concentration of the second organic compound in the mixed powder,
• MOL1 [mol %] and MOL2 [mol %] satisfy the following formula (1),
• wherein when M1 [kg/mol] is used as the molecular weight of the first organic compound,
• when P1 [Pa] is used as the vapor pressure obtained by ThermoGravimetry-Differential Thermal Analysis of the first organic compound at arbitrary temperature,
• when M2 [kg/mol] is used as the molecular weight of the second organic compound, and
• when P2 [Pa] is used as the vapor pressure obtained by ThermoGravimetry-Differential Thermal Analysis of the second organic compound at arbitrary temperature,
• the temperature T1 [° C.] of the first organic compound in the case of P1/M1/2=0.04×{MOL1/(MOL1+MOL2)} and
• the temperature T2 [° C.] of the second organic compound in the case of P2/M1/2=0.04×{MOL2/(MOL1+MOL2)} satisfy the following formula (2):
• 0
• <
• MOL
• ⁢
• 2
• /
• (
• MOL
• ⁢
• 1
• +
• MOL
• ⁢
• 2
• )
• ≦
• 0
• .45
• (
• 1
• )
• -
• 20
• ⁢
• °
• ⁢
• C
• .
• ≦
• T
• ⁢
• 1
• -
• T
• ⁢
• 2
• ≦
• 40
• ⁢
• °
• ⁢
• C
• .
• (
• 2
• )
• .

38:

• A composition for a deposition in an organic electroluminescence device, comprising a first organic compound and a second organic compound,
• wherein the organic electroluminescence device comprises a cathode, an anode, and an emitting layer arranged between the cathode and the anode, and comprising a compound C2 having delayed fluorescence, and
• each of the first organic compound and the second organic compound is a compound selected from the group consisting of a fluorescent emitting compound C1, the compound C2, and a compound C3 different from both the compound C1 and the compound C2,
• wherein the first organic compound is the compound C3, and the second organic compound is the compound C2,
• the first organic compound is the compound C3, and the second organic compound is the compound C1,
• the first organic compound is the compound C2, and the second organic compound is the compound C1, or
• the first organic compound is the compound C2, and the second organic compound is the compound C3,
• wherein when MOL1 [mol %] is used as the molar concentration of the first organic compound in the composition, and
• when MOL2 [mol %] is used as the molar concentration of the second organic compound in the composition,
• MOL1 [mol %] and MOL2 [mol %] satisfy the following formula (1),
• wherein when M1 [kg/mol] is used as the molecular weight of the first organic compound,
• when P1 [Pa] is used as the vapor pressure obtained by ThermoGravimetry-Differential Thermal Analysis of the first organic compound at arbitrary temperature,
• when M2 [kg/mol] is used as the molecular weight of the second organic compound, and
• when P2 [Pa] is used as the vapor pressure obtained by ThermoGravimetry-Differential Thermal Analysis of the second organic compound at arbitrary temperature,
• the temperature T1 [° C.] of the first organic compound in the case of P1/M1/2=0.04×{MOL1/(MOL1+MOL2)} and
• the temperature T2 [° C.] of the second organic compound in the case of P2/M1/2=0.04×{MOL2/(MOL1+MOL2)} satisfy the following formula (2):
• 0
• <
• MOL
• ⁢
• 2
• /
• (
• MOL
• ⁢
• 1
• +
• MOL
• ⁢
• 2
• )
• ≦
• 0
• .45
• (
• 1
• )
• -
• 20
• ⁢
• °
• ⁢
• C
• .
• ≦
• T
• ⁢
• 1
• -
• T
• ⁢
• 2
• ≦
• 40
• ⁢
• °
• ⁢
• C
• .
• (
• 2
• )
• .