| 摘要 |
A QD protecting material having high compatibility with a binder component in a luminescent layer. The luminescent layer contains, as a part of its chemical structure, a compound containing a moiety A having a sum atomic weight MA of 100 or more and quantum dots protected by a protecting material, the protecting material contains, as a part of its chemical structure, a linking group connected to a quantum dot surface and a moiety B that has a sum atomic weight MB of 100 or more, satisfies a relationship between MB and MA represented by |MA−MB|/MB (2, and satisfies the requirement that the sum atomic weight MB is larger than one-third of the molecular weight of the protecting material, and a solubility parameter SA of the moiety A and a solubility parameter SB of the moiety B satisfy a relationship represented by |SA (SB| (2. |
| 主权项 |
1. A light emitting device comprising: a substrate; two or more opposed electrodes provided on the substrate; and a luminescent layer provided between two of the electrodes; the light emitting device further optionally comprising a metal layer provided on the electrodes, wherein
the luminescent layer contains, as a part of its chemical structure, a compound containing a moiety A having a sum atomic weight MA of 100 or more and quantum dots protected by a protecting material, the sum atomic weight MA of the moiety A is larger than one-third of the molecular weight of the compound comprising the moiety A, the protecting material contains, as a part of its chemical structure, a linking group having the function of connecting to a quantum dot surface and a moiety B that has a sum atomic weight MB of 100 or more, satisfies a relationship between the sum atomic weight MB and the sum atomic weight MA represented by formula (I), and satisfies the requirement that the sum atomic weight MB is larger than one-third of the molecular weight of the protecting material, a solubility parameter SA of the moiety A and a solubility parameter SB of the moiety B satisfy a relationship represented by formula (II):
|MA−MB|/MB≦2 formula (I); and|SA−SB|≦2 formula (II), and the compound comprising the moiety A constituting the luminescent layer is a compound represented by chemical formula (2), and the protecting material is a compound represented by chemical formula (3), wherein Ar1 to Ar4, which may be the same or different, represent an unsubstituted or substituted aromatic hydrocarbon group having 6 to 60 carbon atoms involved in a conjugated bond, or an unsubstituted or substituted heterocyclic group having 4 to 60 carbon atoms involved in a conjugated bond; n is 1 to 10000 and m is 0 to 10000, provided that n+m=1 to 20000; the two repeating units are arranged in any order; when two or more repeating units represented by the repeating unitare present in an identical molecule, they may be the same or different; and, when two or more repeating units represented by —(Ar4)— are present in an identical molecule, they may be the same or different, and wherein Ar5 to Ar8, which may be the same or different, represent an unsubstituted or substituted aromatic hydrocarbon group having 6 to 60 carbon atoms involved in a conjugated bond, or an unsubstituted or substituted heterocyclic group having 4 to 60 carbon atoms involved in a conjugated bond; q is 1 to 10 and r is 0 to 10, provided that q+r=1 to 20; the two repeating units are arranged in any order; the linking group —O—P(═O)Cl2 may be linked to a repeating unit —(Ar8)— or may be linked to another repeating unitwhen two or more repeating units represented by the repeating unitare present in an identical molecule, they may be the same or different; and when two or more repeating units represented by —(Ar8)— are present in an identical molecule, they may be the same or different. |
