GB1385911A - Electroluminescent devices - Google Patents

Electroluminescent devices

Info

Publication number
GB1385911A
GB1385911A GB786071A GB786071A GB1385911A GB 1385911 A GB1385911 A GB 1385911A GB 786071 A GB786071 A GB 786071A GB 786071 A GB786071 A GB 786071A GB 1385911 A GB1385911 A GB 1385911A
Authority
GB
United Kingdom
Prior art keywords
anthracene
anode
naphthaldiazine
dihydroxy
luminescence
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB786071A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
EMI Ltd
Original Assignee
EMI Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by EMI Ltd filed Critical EMI Ltd
Priority to GB786071A priority Critical patent/GB1385911A/en
Publication of GB1385911A publication Critical patent/GB1385911A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B33/00—Electroluminescent light sources
    • H05B33/12—Light sources with substantially two-dimensional radiating surfaces
    • H05B33/14—Light sources with substantially two-dimensional radiating surfaces characterised by the chemical or physical composition or the arrangement of the electroluminescent material, or by the simultaneous addition of the electroluminescent material in or onto the light source
    • H05B33/145—Arrangements of the electroluminescent material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K2/00—Non-electric light sources using luminescence; Light sources using electrochemiluminescence
    • F21K2/06—Non-electric light sources using luminescence; Light sources using electrochemiluminescence using chemiluminescence
    • F21K2/08—Non-electric light sources using luminescence; Light sources using electrochemiluminescence using chemiluminescence activated by an electric field, i.e. electrochemiluminescence
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B33/00—Electroluminescent light sources
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
    • H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
    • H10K50/125—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers specially adapted for multicolour light emission, e.g. for emitting white light

Landscapes

  • Chemical & Material Sciences (AREA)
  • Electrochemistry (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Luminescent Compositions (AREA)
  • Electroluminescent Light Sources (AREA)

Abstract

1385911 Electroluminescence EMI Ltd 17 Feb 1972 [24 March 1971] 7860/71 Heading C4S [Also in Division H1] A double injection electroluminescent device comprises a first material which luminesces at one wavelength and a second material provided in the first material as host lattice, the second material being stimulated to luminescence at a second wavelength by the luminescence of the first material. The first material may be anthracene, the second material, rubrene, perylene, tetracene or 2-21-dihydroxy- 1 - 1<SP>1</SP> - naphthaldiazine. The anthracene may be 99À999% pure with a 50% transparent anode. The anode may comprise a thin layer or grid of Au or an alloy of Se and Te. The cathode may comprise Na or K or an alloy thereof. The anode and/or cathode may alternatively comprise C fibres as in Specification 1,380,417. Encapsulation prevents oxygen and water ingress. Anthracene emits in the 4300 Š region and 1-10 p.p.m. 2-2<SP>1</SP>-dihydroxy-1-1<SP>1</SP>- naphthaldiazine for example, converts to yellowish green light to which the eye is more sensitive. The converter material is incorporated within the lattice by doping. Exciton and resonance transfer mechanisms are mentioned.
GB786071A 1971-03-24 1971-03-24 Electroluminescent devices Expired GB1385911A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB786071A GB1385911A (en) 1971-03-24 1971-03-24 Electroluminescent devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB786071A GB1385911A (en) 1971-03-24 1971-03-24 Electroluminescent devices

Publications (1)

Publication Number Publication Date
GB1385911A true GB1385911A (en) 1975-03-05

Family

ID=9841188

Family Applications (1)

Application Number Title Priority Date Filing Date
GB786071A Expired GB1385911A (en) 1971-03-24 1971-03-24 Electroluminescent devices

Country Status (1)

Country Link
GB (1) GB1385911A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0281381A2 (en) * 1987-03-02 1988-09-07 EASTMAN KODAK COMPANY (a New Jersey corporation) Electroluminescent device with modified thin film luminescent zone
US5281489A (en) * 1990-03-16 1994-01-25 Asashi Kasei Kogyo Kabushiki Kaisha Electroluminescent element

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0281381A2 (en) * 1987-03-02 1988-09-07 EASTMAN KODAK COMPANY (a New Jersey corporation) Electroluminescent device with modified thin film luminescent zone
EP0281381A3 (en) * 1987-03-02 1989-06-28 Eastman Kodak Company Electroluminescent device with modified thin film luminescent zone
US5281489A (en) * 1990-03-16 1994-01-25 Asashi Kasei Kogyo Kabushiki Kaisha Electroluminescent element

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees