LIGHTING EMITTING MATERIAL COMPRISING IRIDIUM COMPLEX HAVING AT LEAST TWO 2-ARYLPYRIDINE LIGANDS, LIGHT EMITTING ELEMENT CONTAINING THE LIGHTING EMITTING MATERIAL, ITS PREPARATION METHOD, AND PREPARATION METHOD OF LIGHT EMITTING LAYER

摘要

PURPOSE: Provided are a light emitting material which is improved in luminous efficiency, a light emitting element containing the light emitting material, its preparation method, and a method for preparing a light emitting layer. CONSTITUTION: The light emitting material comprises a compound having a partial structure represented by the formulas I and II, wherein R1, R2 and R3 are independently H, a halogen atom, a substituted or unsubstituted alkyl, alkoxy, cycloalkyl, alkenyl, alkynyl, aryl, heteroaryl or alkylalkoxy group, an alkylthio group, an acyl group, an acyloxy group, an aminoacyl group, a sulfonyl group, a sulfinyl group, a silyl group or a boron group; Ar is a substituted or unsubstituted arylene or heteroarylene group; G is a substituted or unsubstituted alkyl, alkoxy, aryl, heteroaryl, aryloxy, dialkylamino, alkylamino, diarylamino or amino group, a cyano group, F, a silyl group or a boron group; Z101 comprises a group forming a substituted or unsubstituted aryl or heteroaryl ring together with the carbon atom where Z101 is adhered; R1, R2, R3 and G are not F, -CnF2n+1, -OCnF2n+1 or -OCF2X (wherein n is an integer of 1-6, and X is H, Cl or Br); if Ar is a substituted arylene group, the substituent is not F, -CnF2n+1, -OCnF2n+1 or -OCF2X; and if G is -OCH3 or -N(CH3)2, Ar is not a C6 arylene group.