Organic light emitting devices having reduced pixel shrinkage
First Claim
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1. An organic light emitting device comprising an array of pixels defined by a photoresist grid and having a pixel pitch of less than 500 μ
- m, wherein each pixel comprises an emissive layer comprising a phosphorescent emissive material of the formula VII M is a metal atom;
each R1, R2, R3, R4, R9, R10, R11, and R12 is, independently, H, F, Cl, Br, I, R, OR, N(R)2, SR, C(O)R, C(O)OR, C(O)N(R)2, CN, NO2, SO2, SOR, SO2R, SO3R; and
additionally, or alternatively, any one or more of R1 and R2, or R2 and R3, or R3 and R4, or R9 and R10, or R10 and R11, or R11 and R12, together form, independently, a fused 4- to 7-member cyclic group, wherein said cyclic group is cycloalkyl, cycloheteroalkyl, aryl, or heteroaryl, and wherein said cyclic group is optionally substituted by one or more substituents X;
each R is, independently, H, C1–
C20 alkyl, C2–
C20 alkenyl, C2–
C20 alkynyl, C1–
C20 heteroalkyl, C5–
C40 aryl, C5–
C40 heteroaryl, aralkyl;
wherein R is optionally substituted by one or more substituents X;
each X is, independently, H, F, Cl, Br, I, R′
, OR′
, N(R′
)2, SR′
, C(O)R′
, C(O)OR′
, C(O)N(R′
)2, CN, NO2, SO2, SOR′
, SO2R′
, or SO3R′
;
each R′
is, independently, H, C1–
C20 alkyl, C1–
C20 perhaloalkyl, C2–
C20 alkenyl, C2–
C20 alkynyl, C1–
C20 heteroalkyl, C5–
C40 aryl, or C5–
C40 heteroaryl; and
wherein at least one of R1, R2, R3, R4, R9, R10, R11, and R12 is not H.
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Abstract
The present invention relates to organic light emitting devices (OLEDs), and more specifically to efficient OLEDs comprising an array of pixels and having reduced pixel shrinkage. The devices of the present invention comprise further relates to materials for use as emissive materials which give reduced shrinkage when incorporated into an OLED.
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Citations
18 Claims
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1. An organic light emitting device comprising an array of pixels defined by a photoresist grid and having a pixel pitch of less than 500 μ
- m, wherein each pixel comprises an emissive layer comprising a phosphorescent emissive material of the formula VII
M is a metal atom; each R1, R2, R3, R4, R9, R10, R11, and R12 is, independently, H, F, Cl, Br, I, R, OR, N(R)2, SR, C(O)R, C(O)OR, C(O)N(R)2, CN, NO2, SO2, SOR, SO2R, SO3R; and
additionally, or alternatively, any one or more of R1 and R2, or R2 and R3, or R3 and R4, or R9 and R10, or R10 and R11, or R11 and R12, together form, independently, a fused 4- to 7-member cyclic group, wherein said cyclic group is cycloalkyl, cycloheteroalkyl, aryl, or heteroaryl, and wherein said cyclic group is optionally substituted by one or more substituents X;each R is, independently, H, C1–
C20 alkyl, C2–
C20 alkenyl, C2–
C20 alkynyl, C1–
C20 heteroalkyl, C5–
C40 aryl, C5–
C40 heteroaryl, aralkyl;
wherein R is optionally substituted by one or more substituents X;each X is, independently, H, F, Cl, Br, I, R′
, OR′
, N(R′
)2, SR′
, C(O)R′
, C(O)OR′
, C(O)N(R′
)2, CN, NO2, SO2, SOR′
, SO2R′
, or SO3R′
;each R′
is, independently, H, C1–
C20 alkyl, C1–
C20 perhaloalkyl, C2–
C20 alkenyl, C2–
C20 alkynyl, C1–
C20 heteroalkyl, C5–
C40 aryl, or C5–
C40 heteroaryl; andwherein at least one of R1, R2, R3, R4, R9, R10, R11, and R12 is not H. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
- m, wherein each pixel comprises an emissive layer comprising a phosphorescent emissive material of the formula VII
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17. An organic light emitting device having an emissive layer, wherein the emissive layer comprises a phosphorescent emissive material of the formula Ic
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18. The compound having the formula Ic
Specification