Organic electroluminescent materials and devices

An organic light emitting device (OLED) comprising:

• an anode;
• a cathode;
• and
• an organic layer disposed between the anode and the cathode, wherein the organic layer comprises a compound comprising:
• a metal planar tetradentate coordination configuration of Formula I,
• wherein:
• metal M is Pt or Pd;
• Z11, Z12, Z13, and Z14 are four coordinating atoms of a tetradentate ligand;
• and
• each one of Z11, Z12, Z13, and Z14 is independently selected from the group consisting of C, N, O, S, P, B, and Si;
• and
• a ring system consisting of all atoms of all metal-containing rings that are defined by the metal M and the tetradentate ligand,
• wherein each metal-containing ring in the ring system independently comprises the metal M, two of Z11, Z12, Z13, and Z14, and all atoms of the tetradentate ligand that define said metal-containing ring with the metal M and said two of Z11, Z12, Z13, and Z14, such that when outline of each of the metal-containing ring is traced, the outline does not use any atom more than once;
• wherein atoms M, Z11, Z12, Z13, and Z14 define a first plane that passes through the metal M and is positioned to have a minimum sum of shortest distances with Z11, Z12, Z13, and Z14;
• wherein a first atom is an atom of the ring system on a first side of the first plane that the furthest perpendicular distance h1 from the first plane;
• a second atom is another atom of the ring system on a second side of the first plane that the furthest perpendicular distance h2 from the first plane, wherein the first side and the second side are on opposite sides of the first plane;
• and
• h1+h2 is at least 6.1 Å.

A consumer product comprising an organic light-emitting device comprising:

• an anode;
• a cathode;
• and
• an organic layer disposed between the anode and the cathode, wherein the organic layer comprises a compound comprising:
• a metal planar tetradentate coordination configuration of Formula I,
• wherein:
• metal M is Pt or Pd;
• Z11, Z12, Z13, and Z14 are four coordinating atoms of a tetradentate ligand;
• and
• each one of Z11, Z12, Z13, and Z14 is independently selected from the group consisting of C, N, O, S, P, B, and S1;
• and
• a ring system consisting of all atoms of all metal-containing rings that are defined by the metal M and the tetradentate ligand, wherein each metal-containing ring in the ring system independently comprises the metal M, two of Z11, Z12, Z13, and Z14, and all atoms of the tetradentate ligand that define said metal-containing ring with the metal M and said two of Z11, Z12, Z13, and Z14, such that when outline of each of the metal-containing ring is traced, the outline does not use any atom more than once;
• wherein atoms M, Z11, Z12, Z13, and Z14 define a first plane that passes through the metal M and is positioned to have a minimum sum of shortest distances with Z11, Z12, Z13, and Z14;
• wherein a first atom is an atom of the ring system on a first side of the first plane that the furthest perpendicular distance h1 from the first plane;
• a second atom is another atom of the ring system on a second side of the first plane that the furthest perpendicular distance h2 from the first plane, wherein the first side and the second side are on opposite sides of the first plane;
• and
• h1+h2 is at least 6.1 Å.