Light emitting device, light emitting apparatus provided with a light emitting device, and method of manufacturing a light emitting device
First Claim
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1. A double-sided light-emitter that emits light from both sides thereof, comprising:
- a first electrode;
a laminate disposed on the first electrode that includes a charge injection transport layer and a functional layer including a light-emitting layer;
a second electrode disposed on the laminate; and
a bank that is insulative and defines an area in which the light-emitting layer is to be formed, whereinthe first electrode and the second electrode are transparent electrodes,the charge injection transport layer has a recess in an upper surface of the area defined by the bank,an upper peripheral edge of the recess is covered with a portion of the bank, the upper peripheral edge of the recess comprising at least a portion of an inner side surface of the recess,a part of the light-emitting layer is interposed between the second electrode and the upper peripheral edge of the recess,the part of the light-emitting layer is interposed between the second electrode and the portion of the bank, and undergoes charge injection from the second electrode, andthe portion of the bank is interposed between the upper peripheral edge of the recess and the part of the light-emitting layer.
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Abstract
The present disclosure aims to provide a light-emitter having a favorable luminescence property, a light-emitting device having the light-emitter, and a method of manufacturing the light-emitter. Specifically, the light-emitter has the following structure. A hole injection layer and a light-emitting layer are layered between a first electrode and a second electrode which are transparent, and a light-emitting layer exists in an area defined by a bank. Thus, organic EL elements are formed. The hole injection layer has a recess in an upper surface of the area defined by the bank. An upper peripheral edge of the recess in the hole-injection layer is covered with a portion of the bank.
68 Citations
23 Claims
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1. A double-sided light-emitter that emits light from both sides thereof, comprising:
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a first electrode; a laminate disposed on the first electrode that includes a charge injection transport layer and a functional layer including a light-emitting layer; a second electrode disposed on the laminate; and a bank that is insulative and defines an area in which the light-emitting layer is to be formed, wherein the first electrode and the second electrode are transparent electrodes, the charge injection transport layer has a recess in an upper surface of the area defined by the bank, an upper peripheral edge of the recess is covered with a portion of the bank, the upper peripheral edge of the recess comprising at least a portion of an inner side surface of the recess, a part of the light-emitting layer is interposed between the second electrode and the upper peripheral edge of the recess, the part of the light-emitting layer is interposed between the second electrode and the portion of the bank, and undergoes charge injection from the second electrode, and the portion of the bank is interposed between the upper peripheral edge of the recess and the part of the light-emitting layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method of manufacturing a double-sided light-emitter emitting light from both sides thereof and including a first electrode, a laminate disposed on the first electrode that includes a charge injection transport layer and a functional layer including a light-emitting layer, a second electrode disposed on the laminate, and a bank that defines an area in which the light-emitting layer is to be formed, the method comprising:
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forming the first electrode from a transparent electrode; forming the charge injection transport layer; forming a bank material layer that forms the bank on the charge injection transport layer; removing a portion of the bank material layer to partially expose the charge injection transport layer; heat-treating a remaining portion of the bank material layer; forming the functional layer on an exposed surface of the charge injection transport layer after the heat treatment; and forming the second electrode from a transparent electrode, wherein the charge injection transport layer is made from a material that is eroded when exposed to a liquid used while the charge injection transport layer is partially exposed, the charge injection transport layer having a recess in the exposed surface thereof so that an inner bottom surface of the recess is lower than a bottom surface of a remaining portion of the bank material layer, the recess being formed by the exposed surface eroded by the liquid, the remaining portion of the bank material layer being made fluid so that the bank material layer extends to cover an upper peripheral edge of the recess, the upper peripheral edge of the recess comprising at least a portion of an inner side surface of the recess. - View Dependent Claims (18, 19, 20, 21, 22, 23)
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Specification
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Current AssigneeJDI Design and Development GK
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Original AssigneePanasonic Corporation (Panasonic Holdings Corporation)
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InventorsNishiyama, Seiji
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Primary Examiner(s)Such, Matthew W
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Assistant Examiner(s)Kilpatrick, Warren H
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Application NumberUS13/746,481Publication NumberTime in Patent Office665 DaysField of Search257/40, 438/22US Class Current257/40CPC Class CodesH01L 33/42 Transparent materialsH05B 33/22 characterised by the chemic...H10K 2102/3031 Two-side emission, e.g. tra...H10K 2102/331 Nanoparticles used in non-e...H10K 50/805 ElectrodesH10K 50/816 Multilayers, e.g. transpare...H10K 59/805 ElectrodesH10K 59/80517 Multilayers, e.g. transpare...
