Singlet harvesting with organic molecules for optoelectronic devices

A technology of organic molecules and optoelectronic devices, applied in the field of organic pigments as emitters in OLEDs and other optoelectronic devices, can solve problems such as insufficient long-term stability

Active Publication Date: 2013-04-10
SAMSUNG DISPLAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] - Such emitters based on metal-organic complexes have in many cases only insufficient long-term stability

Method used

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  • Singlet harvesting with organic molecules for optoelectronic devices
  • Singlet harvesting with organic molecules for optoelectronic devices
  • Singlet harvesting with organic molecules for optoelectronic devices

Examples

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specific Embodiment approach

[0104] Different examples include loaded organic molecules and counterions. These emitter molecules can preferably be used in light-emitting electrochemical cells (LEECs or LECs), the theoretical construction of which is known to the skilled person. When applying this loaded organic molecule in an OLED, it may be recommendable to use a larger counterion with the same charge, such as (PF 6 ) - , (BF 4 ) - 、[CF 3 SO 2 ] - , single negatively charged hexa-phenylphosphate, single negatively charged tetraphenylborate, etc., instead of smaller counter ions.

[0105] A few examples - Molecules are symmetrically structured on the surface and thus contain no separate D-groups or A-groups on the surface. However, the molecule is polarized in solution and / or by the action of a counterion, leading to a corresponding donor- or acceptor-action.

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Abstract

The invention relates to a composition comprising an organic emitter molecule, this molecule having a [delta]E(S1-T1) value between the lowermost excited singlet state (S1) and the triplet state beneath it (T1) of less than 2500 cm-1, and an optically inert atom or molecule for reducing the inter-system crossing time constant of the organic molecule to less than 10-6 s.

Description

technical field [0001] The present invention relates to the use of organic pigments as emitters in OLEDs (Organic Light Emitting Diodes) and other optoelectronic devices. Background technique [0002] Currently, there is a huge shift in display technology and lighting technology. It is possible to manufacture flat-panel displays or light-emitting surfaces with a thickness below 0.5 mm. They have many attractive features. It is thus possible, for example, to use the luminous surface as a wall cladding with very low energy consumption. It is of particular interest that it is possible to manufacture color displays with hitherto unachievable color fidelity, brightness and viewing angle independence, which also have an extremely small weight and very low power consumption. The displays can be configured as microdisplays or as rigid or flexible large displays with an area of ​​several square meters, but also as transmissive or reflective displays. In addition, simple and cost-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/06H01L51/50H05B33/14H01L51/00
CPCH05B33/14Y02E10/549H10K50/121H10K50/11H10K2101/10H10K2101/20C09K11/06H10K85/60H10K85/649H10K85/657H10K85/6576H10K85/6574H10K85/6572
Inventor H·耶辛
Owner SAMSUNG DISPLAY CO LTD
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