Title:
ORGANIC LIGHT EMITTING DEVICES BASED ON THE FORMATION OF AN ELECTRON-HOLE PLASMA
Document Type and Number:
WIPO Patent Application WO2004001796
Kind Code:
A3
Abstract:
When the density of excitons in an organic single crystal (302) (including the linear acenes, polyacenes, and thiophenes) approaches the density of molecular sites, an electron-hole plasma may form in the material altering the overall excitonic character of the system. The formation of the electron-hole plasma arises as a result of the screening of Coulomb interactions within individual excitons by injected free carriers. The large excitation densities required to accomplish this screening process can only be realized when excitation collect near dislocations, defects, traps, or are confined in heterostructures. Such confinement and subsequently large excitation densities allows for the observation of physical phenomena not generally accessible in an organic material. Specifically, the formation of an electron-hole plasma in an organic single crystal (302) can allow for the observation of field-effect transistor action and electrically-pumped lasing. Amorphous organic materials and polymeric organic materials can also used to sustain an electron-hole plasma and demonstrate similar phenomena as well.
Inventors:
HOLMES RUSSELL JAMES DELMAR (US)
BALDO MARC A (US)
FORREST STEPHEN R (US)
BALDO MARC A (US)
FORREST STEPHEN R (US)
Application Number:
PCT/US2003/014060
Publication Date:
July 15, 2004
Filing Date:
May 06, 2003
Export Citation:
Assignee:
UNIV PRINCETON (US)
HOLMES RUSSELL JAMES DELMAR (US)
BALDO MARC A (US)
FORREST STEPHEN R (US)
HOLMES RUSSELL JAMES DELMAR (US)
BALDO MARC A (US)
FORREST STEPHEN R (US)
International Classes:
H01S5/12; H01S5/36; H01L51/50; H01S5/125; H01S5/20; (IPC1-7): H01S3/14; H01L29/08; H01L29/22; H01L29/227; H01L29/24; H01L31/109
Foreign References:
| US6515314B1 | 2003-02-04 | |||
| US5371817A | 1994-12-06 | |||
| US6097147A | 2000-08-01 | |||
| US5580523A | 1996-12-03 | |||
| US6124964A | 2000-09-26 |
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