Title: Excited state management

Abstract

Arrangements and techniques for providing organic emissive layers are provided, in which the emissive layer includes a first dopant having a dissociative energy level. A second dopant in the emissive layer provides a solid state sink energy level, to which doubly excited excitons and/or polarons may transition instead of to the dissociative energy level, thereby decreasing the undesirable effects of transitions to the dissociative energy level.

Inventors:

Forrest, Stephen R.; Slootsky, Michael; Thompson, Mark E.

Issue Date:

2018-03-27

Research Org.:

Univ. of Michigan, Ann Arbor, MI (United States); Univ. of Southern California, Los Angeles, CA (United States)

Sponsoring Org.:

USDOE

OSTI Identifier:

1532078

Patent Number(s):

9929365

Application Number:

14/724,238

Assignee:

The Regents of the University of Michigan (Ann Arbor, MI); University of Southern California (Los Angeles, CA)

Patent Classifications (CPCs):

C - CHEMISTRY C09 - DYES C09K - MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE

H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01L - SEMICONDUCTOR DEVICES

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C - CHEMISTRY C09 - DYES C09K - MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE

C09K2211/1088 - containing oxygen as the only heteroatom
C09K2211/1011 - Condensed systems

H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01L - SEMICONDUCTOR DEVICES

H01L51/5016 - {Triplet emission}

C - CHEMISTRY C09 - DYES C09K - MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE

C09K11/06 - containing organic luminescent materials

H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01L - SEMICONDUCTOR DEVICES

H01L51/5028 - {for assisting energy transfer, e.g. sensitization}

C - CHEMISTRY C09 - DYES C09K - MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE

C09K2211/1044 - containing two nitrogen atoms as heteroatoms
C09K2211/1007 - Non-condensed systems

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DOE Contract Number:  

SC00001013

Resource Type:

Patent

Resource Relation:

Patent File Date: 2015-05-28

Country of Publication:

United States

Language:

English