ORGANIC ELECTROLUMINESCENT DEVICE
An organic electroluminescent device includes an anode and a cathode that are a pair of electrodes, at least one of the electrodes being transparent or translucent; and an organic compound layer interposed between the electrodes, the organic compound layer including at least one layer containing a cured film obtained from a composition that contains an amine compound having six or more crosslinkable groups. The cured film has a residual film ratio of 90% or more after a condition described below, and a rate of change in surface roughness Ra of the cured film before and after the condition described below is 0.99 or more: condition: placing toluene on the cured film and leaving toluene thereon for 30 seconds.
1 . An organic electroluminescent device comprising:
an anode and a cathode that are a pair of electrodes, at least one of the electrodes being transparent or translucent; and
an organic compound layer interposed between the electrodes, the organic compound layer including at least one layer containing a cured film obtained from a composition that contains an amine compound having six or more crosslinkable groups,
wherein the cured film has a residual film ratio of 90% or more after a condition described below, and a rate of change in surface roughness Ra of the cured film before and after the condition described below is 0.99 or more:
condition: placing toluene on the cured film and leaving toluene thereon for 30 seconds.
2 . The organic electroluminescent device according to claim 1 , wherein the surface roughness Ra of the cured film after the condition is 25 nm or less.
3 . The organic electroluminescent device according to claim 1 , wherein the crosslinkable groups in the amine compound contain a vinylphenyl group.
4 . The organic electroluminescent device according to claim 3 , wherein a functional group that contains the vinylphenyl group is a group that has at least one of groups represented by general formulae (A-1) and (A-2):
wherein, in (A-1) and (A-2), X each independently represent a divalent linking group formed of one or a combination of two or more selected from an alkylene group, —C═C—, —C(═O)—, —N(R)—, —O—, and —S—, R represents a hydrogen atom, an alkyl group, an aryl group, or an aralkyl group, and p11 and p12 each independently represent an integer of 0 or 1.
5 . The organic electroluminescent device according to claim 4 , wherein the amine compound is selected from the group consisting of compounds represented by general formulae (B-1), (B-2), and (B-3):
wherein:
R 101 , R 102 , R 103 , R 104 , R 105 , R 106 , R 107 , R 108 , R 109 , R 110 , R 111 , R 112 , R 113 , R 114 , and R 115 each independently represent a hydrogen atom, a halogen atom, an alkyl group, an alkoxy group, an aryl group, a group represented by general formula (A-1), or a group represented by general formula (A-2) provided that the number of the crosslinkable groups in the compound is six or more;
R 201 , R 202 , R 203 , R 204 , R 205 , R 206 , R 207 , R 208 , R 209 , R 210 , R 211 , R 212 , R 213 , R 214 , R 215 , R 216 , R 217 , R 218 , R 219 , R 220 , R 221 , R 222 , R 223 , R 224 , R 225 , R 226 , R 227 , and R 228 each independently represent a hydrogen atom, a halogen atom, an alkyl group, an alkoxy group, an aryl group, a group represented by general formula (A-1), or a group represented by general formula (A-2) provided that the number of the crosslinkable groups in the compound is six or more; and
R 301 , R 302 , R 303 , R 304 , R 305 , R 306 , R 307 , R 308 , R 309 , R 310 , R 311 , R 312 , R 313 , R 314 , R 315 , R 316 , R 317 , R 318 , R 319 , R 320 , R 321 , R 322 , R 323 , R 324 , R 325 , R 326 , R 327 , and R 328 each independently represent a hydrogen atom, a halogen atom, an alkyl group, an alkoxy group, an aryl group, a group represented by general formula (A-1), or a group represented by general formula (A-2) provided that the number of the crosslinkable groups in the compound is six or more.
6 . The organic electroluminescent device according to claim 1 , wherein the composition further contains a radical generating agent selected from the group consisting of a thermal radical generating agent and a photo-radical generating agent.
7 . The organic electroluminescent device according to claim 6 , wherein 0.1 to 25 parts by mass of the thermal radical generating agent is contained relative to a total solid content of 100 parts by mass in the composition.
8 . The organic electroluminescent device according to claim 6 , wherein 0.001 to 10 parts by mass of the photo-radical generating agent is contained relative to a total solid content of 100 parts by mass in the composition.
9 . The organic electroluminescent device according to claim 1 , wherein the cured film has a volume resistivity in a range of 1×10 5 Ω·cm to 1×10 15 Ω·cm.
10 . The organic electroluminescent device according to claim 1 , wherein the cured film has a volume resistivity in a range of 1×10 5 Ω·cm to 1×10 10 Ω·cm.
11 . The organic electroluminescent device according to claim 1 , wherein the residual film ratio is 95% or more.