Organic electroluminescent dopant material and light-emitting device

An organic electroluminescent dopant material, comprising a compound M(LA)2(LB), wherein M is a metal;

• LA and LB are both ligands, and LA and LB are compounds having the following general structural formulas:
• Ar1 and Ar2 are independently selected from any one of —F, —CN, —CH3, —CD3, —CT3, —CF3, —CH2F, —CHF2, —Ge(Me)3, —Si(Me)3, substituted or unsubstituted C2-C6 alkyl, substituted or unsubstituted C3-C20 cycloalkyl, substituted or unsubstituted C6-C10 aryl, and substituted or unsubstituted 4- to 8-membered aromatic heterocyclyl;
• R1, R2, R3, R4, R5, R6, R7, R8, and R9 are independently selected from any one of —H, —F, —CN, —CH3, —CD3, —CT3, —CF3, —CH2F, —CHF2, —Ge(Me)3, —Si(Me)3, substituted or unsubstituted C2-C6 alkyl, substituted or unsubstituted C3-C20 cycloalkyl, substituted or unsubstituted C6-C10 aryl, and substituted or unsubstituted 4- to 8-membered aromatic heterocyclyl;
• R10, R11, and R12 are independently selected from any one of —H, -D, -T, —F, —CN, —CH3, —CD3, —CT3, —CF3, —CH2F, —CHF2, —Ge(Me)3, —Si(Me)3, substituted or unsubstituted C2-C6 alkyl, substituted or unsubstituted C3-C20 cycloalkyl, substituted or unsubstituted C6-C10 aryl, and substituted or unsubstituted 4- to 8-membered aromatic heterocyclyl;
• the “substitution” means being capable of being substituted with —H, -D, -T, —F, —CN, —CH3, —CD3, —CT3, —CF3, —CH2F, —CHF2, —Ge(Me)3, —Si(Me)3, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, tert-butyl, cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, thiocyclopentane, phenyl, biphenyl, terphenyl, naphthyl, fluorenyl, phenanthryl, anthracyl, indenyl, triphenylenyl, fluoranthenyl, furyl, thienyl, imidazolyl, pyrazolyl, thiazolyl, pyridinyl, pyrazinyl, pyrimidinyl, benzofuryl, benzothienyl, isobenzofuryl, dibenzofuryl, dibenzothienyl, benzimidazolyl, benzothiazolyl, benzisothiazolyl, benzothiadiazolyl, quinolyl, isoquinolyl, quinazolinyl, quinoxalinyl, and carbazolyl groups.