A gold complex, wherein the gold complex has a chemical structure as shown in formula: wherein X 1, X 2, X 3 are independently selected from carbon and nitrogen, and only one of X 1, X 2, X 3 is nitrogen; Y 1 is O, CR 15 R 16 or S; R 1 -R 16 are independently selected from hydrogen, deuterium, halogen, nitro, cyano, isocyano, trifluoromethyl, or independently selected from the following substituted or unsubstituted groups: alkyl, cycloalkyl, alkenyl, cycloalkenyl, alkynyl, aryl, aralkyl, heteroalkyl, heterocycloalkyl, heterocycloalkenyl, heteroaryl, heteroaralkyl, alkoxy, aryloxy, heteroaryloxy, NR 17 R 18, acyl, acylamino, acyloxy, ester group, acylamido, sulfonylamino, sulfonyloxy, sulfonato, sulfonylamido or trialkylsilyl; wherein R 17 and R 18 are independently selected from the following substituted or unsubstituted groups: alkyl, cycloalkyl, alkenyl, cycloalkenyl, alkynyl, aryl, aralkyl, heteroalkyl, heterocycloalkyl, heterocycloalkenyl, heteroaryl, heteroaralkyl, alkoxy, aryloxy and heteroaryloxy, wherein, when substituted, the values representing variables R1-R16 may contain substituents of deuterium, fluorine, chlorine, bromine, iodine; hydroxyl, oxo; amino (primary, secondary, tertiary), imino, nitro, nitroso; cyano, isocyano, alkyl, heteroalkyl, cycloalkyl, heterocycloalkyl, aryl, heteroaryl, alkenyl, cycloalkenyl, alkynyl; lower alkoxy, aryloxy; mercapto, thioether; phosphine; carboxyl, sulfonalo, phosphono; acyl, thiocarbonyl, sulfonyl; amide, sulfonamide; ketone; aldehyde; ester, sulfonate; haloalkyl (for example, difluoromethyl, trifluoromethyl); monocyclic or fused or non-fused polycycliccarbocycloalkyl (for example, cyclopropyl, cyclobutyl, cyclopentyl or cyclohexyl); or monocyclic or fused or non-fused polycyclic heterocycloalkyl (for example, pyrrolidinyl,piperidinyl, piperazinyl, morpholinyl or thiazinyl); or a monocyclic or fused or non-fused polycyclic carbocyclic or heterocyclic aryl (eg., phenyl, naphthyl, thiazolyl, oxazolyl, imidazolyl, isoxazolyl, pyrrolyl, pyrazolyl, triazolyl, tetrazolyl, thienyl, furyl, pyridyl, pyrimidinyl, pyrazinyl, pyridazinyl, indolyl, quinolinyl, isoquinolinyl, quinoxalinyl, bipyridyl, acridinyl, phenanthridinyl, phenanthrolinyl, quinazolonyl, benzimidazolyl, benzofuranyl, benzothienyl, benzothiazolyl, benzoxazolyl, benzisoxazolyl); or aryl-lower alkyl; -CHO; -CO (alkyl); -CO (aryl); -CO2 (alkyl);-CO2 (aryl); -CONH2; -SO2NH2; - OCH2CONH2; -OCHF2; -OCF3; -CF3; -NH2; -NH(alkyl);-N(alkyl)2; -NH(aryl); -N(alkyl)(aryl); -N(aryl)2 or when the substituent is oxygen, two hydrogen atoms on the same or different carbons together form a carbonyl or cyclic ether, such as ketone carbonyl, aldehyde carbonyl, ester carbonyl, amide carbonyl, ethylene oxide, and wherein these parts can also be substituted such as to form fused ring structures or bridges as for example in -OCH2O-. X 1, X 2, X 3 are independently selected from carbon and nitrogen, and only one of X 1, X 2, X 3 is nitrogen; Y 1 is O, CR 15 R 16 or S; R 1 -R 16 are independently selected from hydrogen, deuterium, halogen, nitro, cyano, isocyano, trifluoromethyl, or independently selected from the following substituted or unsubstituted groups: alkyl, cycloalkyl, alkenyl, cycloalkenyl, alkynyl, aryl, aralkyl, heteroalkyl, heterocycloalkyl, heterocycloalkenyl, heteroaryl, heteroaralkyl, alkoxy, aryloxy, heteroaryloxy, NR 17 R 18, acyl, acylamino, acyloxy, ester group, acylamido, sulfonylamino, sulfonyloxy, sulfonato, sulfonylamido or trialkylsilyl; wherein R 17 and R 18 are independently selected from the following substituted or unsubstituted groups: alkyl, cycloalkyl, alkenyl, cycloalkenyl, alkynyl, aryl, aralkyl, heteroalkyl, heterocycloalkyl, heterocycloalkenyl, heteroaryl, heteroaralkyl, alkoxy, aryloxy and heteroaryloxy, wherein, when substituted, the values representing variables R1-R16 may contain substituents of deuterium, fluorine, chlorine, bromine, iodine; hydroxyl, oxo; amino (primary, secondary, tertiary), imino, nitro, nitroso; cyano, isocyano, alkyl, heteroalkyl, cycloalkyl, heterocycloalkyl, aryl, heteroaryl, alkenyl, cycloalkenyl, alkynyl; lower alkoxy, aryloxy; mercapto, thioether; phosphine; carboxyl, sulfonalo, phosphono; acyl, thiocarbonyl, sulfonyl; amide, sulfonamide; ketone; aldehyde; ester, sulfonate; haloalkyl (for example, difluoromethyl, trifluoromethyl); monocyclic or fused or non-fused polycycliccarbocycloalkyl (for example, cyclopropyl, cyclobutyl, cyclopentyl or cyclohexyl); or monocyclic or fused or non-fused polycyclic heterocycloalkyl (for example, pyrrolidinyl,piperidinyl, piperazinyl, morpholinyl or thiazinyl); or a monocyclic or fused or non-fused polycyclic carbocyclic or heterocyclic aryl (eg., phenyl, naphthyl, thiazolyl, oxazolyl, imidazolyl, isoxazolyl, pyrrolyl, pyrazolyl, triazolyl, tetrazolyl, thienyl, furyl, pyridyl, pyrimidinyl, pyrazinyl, pyridazinyl, indolyl, quinolinyl, isoquinolinyl, quinoxalinyl, bipyridyl, acridinyl, phenanthridinyl, phenanthrolinyl, quinazolonyl, benzimidazolyl, benzofuranyl, benzothienyl, benzothiazolyl, benzoxazolyl, benzisoxazolyl); or aryl-lower alkyl; -CHO; -CO (alkyl); -CO (aryl); -CO2 (alkyl);-CO2 (aryl); -CONH2; -SO2NH2; - OCH2CONH2; -OCHF2; -OCF3; -CF3; -NH2; -NH(alkyl);-N(alkyl)2; -NH(aryl); -N(alkyl)(aryl); -N(aryl)2 or when the substituent is oxygen, two hydrogen atoms on the same or different carbons together form a carbonyl or cyclic ether, such as ketone carbonyl, aldehyde carbonyl, ester carbonyl, amide carbonyl, ethylene oxide, and wherein these parts can also be substituted such as to form fused ring structures or bridges as for example in -OCH2O-.