Stable electroluminescent device
View Patent ↗Disclosed is an OLED device comprising an anode and a cathode and, located therebetween, a light emitting layer (LEL) containing a host and a stabilizer, wherein the stabilizer contains at least 5 fused rings and exhibits a first triplet energy level below 130 kJ/mol.
1. An OLED device comprising an anode and a cathode and, located therebetween, a light emitting layer (LEL) containing a host, an emissive dopant, and a stabilizer, wherein the stabilizer is a material different from the emissive dopant and contains at least 5 fused rings and is represented by Formula (1):
wherein,
each X a , X b , X c , X d is an independently selected substituent, two of which having the same superscript_may join to form a fused ring and k, l, m, and n are independently 0 to 4;
each Y a , Y b , Y c , Y d is independently selected as either carbon or nitrogen atoms and X e , X f , X g , X h exist only in cases of carbon atoms;
each X e , X f , X g , X h is hydrogen or an independently selected substituent;
X i is a substituent and o is 0-2; and
M is a metal atom of copper or cobalt;
wherein the emissive dopant is one emitting blue or green light.
2. An imaging device including the OLED device of claim 1 .
3. An illuminating device including the OLED device of claim 1 .
4. An OLED device comprising a light-emitting layer containing a host, an emissive dopant, and a stabilizer, wherein the stabilizer is a material different from the emissive dopant and is an arylpyrene compound of formula Inv-9
and wherein the emissive dopant is selected from the group consisting of a phosphorescent dye or a fluorescent dye selected from anthracene, tetracene, xanthene, rubrene, coumarin, rhodamine, quinacridone, dicyanomethylenepyran, thiopyran , polymethine, pyrilium thiapyrilium, and carbostyryl compounds.
5. An imaging device including the OLED device of claim 4 .
6. An illuminating device including the OLED device of claim 4 .
7. An OLED device comprising an anode and a cathode and, located therebetween, a light emitting layer (LEL) containing a host, an emissive dopant, and a stabilizer, wherein the stabilizer is a material different from the emissive dopant and contains at least 5 fused rings and is represented by Formula (1):
wherein, each X a , X b , X c , X d is an independently selected substituent, two of which may join to form a fused ring and k, l, m, and n are independently 0 to 4;
each Y a , Y b , Y c , Y d is independently selected as either carbon or nitrogen atoms and X e , X f , X g , X h exist only in cases of carbon atoms;
each X e , X f , X g , X h is hydrogen or an independently selected substituent;
X i is a substituent and o is 0-2; and
M is a metal atom of copper or cobalt; wherein the compound of formula (1) is asymmetric, and
wherein the emissive dopant is one emitting blue or green light.
8. An OLED device comprising an anode and a cathode and, located therebetween, a light emitting layer (LEL) containing a host, an emissive dopant, and a stabilizer, wherein the stabilizer is a material different from the emissive dopant and contains at least 5 fused rings and is represented by Formula (1):
wherein,
each X a , X b , x c , X d is an independently selected substituent, two of which may join to form a fused ring and k, l, m, and n are independently 0 to 4;
each Y a , Y b , Y c , Y d is independently selected as either carbon or nitrogen atoms and X e , X f ,X g , X h exist only in cases of carbon atoms;
each X e , X f , X g , X h is hydrogen or an independently selected substituent;
X i is a substituent and o is 0-2; and
M is a metal atom; wherein the compound of formula (1) is asymmetric, and wherein the emissive dopant is selected from the group consisting of a phosphorescent dye or a fluorescent dye selected from anthracene, tetracene, xanthene, perylene, rubrene, coumarin, rhodamine, quinacridone, dicyanomethylenepyran, thiopyran , polymethine, pyrilium thiapyrilium, and carbostyryl compounds.
9. An OLED device comprising an anode and a cathode and, located therebetween, a light emitting layer (LEL) containing a host, an emissive dopant, and a stabilizer, wherein the stabilizer is a material different from the emissive dopant and contains at least 5 fused rings and is represented by Formula (1):
wherein,
each X a , X b , X c , X d is an independently selected substituent, two of which may join to form a fused ring and k, l, m, and n are independently 0 to 4;
each Y a , Y b , Y c , Y d is independently selected as either carbon or nitrogen atoms and X e , X f , X g , X h exist only in cases of carbon atoms;
each X e , X f , X g , X h is hydrogen or an independently selected substituent;
X i is a substituent and o is 0-2; and
M is a metal atom of copper or cobalt; wherein the compound of formula (1) is asymmetric, and
wherein the emissive dopant is selected from the group consisting of a phosphorescent dye or a fluorescent dye selected from anthracene, tetracene, xanthene, perylene, rubrene, coumarin, rhodamine, quinacridone, dicyanomethylenepyran, thiopyran , polymethine, pyrilium thiapyrilium, and carbostyryl compounds.
10. An OLED device comprising a light-emitting layer containing a host, an emissive dopant, and a stabilizer, wherein the host is a chelated oxinoid and the stabilizer contains at least 5 fused rings and is a indenoperylene compound.
11. The OLED device of claim 10 wherein the indenoperylene compound is selected from the following: