GB378451A - Improvements relating to photo-electric devices - Google Patents
Improvements relating to photo-electric devicesInfo
- Publication number
- GB378451A GB378451A GB13817/31A GB1381731A GB378451A GB 378451 A GB378451 A GB 378451A GB 13817/31 A GB13817/31 A GB 13817/31A GB 1381731 A GB1381731 A GB 1381731A GB 378451 A GB378451 A GB 378451A
- Authority
- GB
- United Kingdom
- Prior art keywords
- electrode
- photo
- layer
- insulating layer
- caesium
- 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
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J40/00—Photoelectric discharge tubes not involving the ionisation of a gas
- H01J40/16—Photoelectric discharge tubes not involving the ionisation of a gas having photo- emissive cathode, e.g. alkaline photoelectric cell
Landscapes
- Ink Jet Recording Methods And Recording Media Thereof (AREA)
Abstract
378,451. Light-sensitive cells. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN, 13D, Emmasingel, Eindhoven, Holland. May 9, 1931, No. 13817. Convention date, May 10, 1930. [Class 40 (iii).] One electrode consists, at least in part, of a photo-electric substance separated by a layer of less thickness than one millimeter, containing one or more solid insulating substances from the other electrode, both electrodes and the separating layer being supported on one another. The cell will operate without the application of a potential between the electrodes. The photoelectric substance may be caesium, barium, or other alkali or alkaline-earth metals. The separating layer may be the oxide or other compound of one of the electrodes and the photo-electric substance is preferably very thin and adsorbed in the separating layer. The resistance of the insulating layer may be reduced by incorporating with it particles of conducting material such as tungsten or the photo-electric substance. In the cell shown, one electrode 3 consists of a plate of zirconium the surface of which is oxidized to form a thin insulating layer 6. The cell is evacuated and caesium is admitted, for example from a mixture of caesium. chromate and a reducing agent such as zirconium, the metal being deposited as a layer 9 on the insulating layer 6. The filling may be an inert gas or vapour. It is stated that the polarity of the difference of potential set up, depends on the portion of the electrode 9 which is illuminated. Illumination of the upper part of the electrode 9 causes that electrode to become the negative pole, but illumination of the lower part around the junction with the lead 10, where the layer of insulating oxide is thicker, causes the electrode 9 to become the positive pole. In another arrangement the electrode 3 is of nickel, the insulating layer consists of barium oxide, and the photo-electric substance of barium. The insulating layer may also consist of calcium fluoride in which caesium is adsorbed as the photo-electric electrode. A substance such as caesium oxide, which adsorbs the photo-electric substance, may be mixed with or coated on zirconium oxide or other insulating layer.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL378451X | 1930-05-10 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB378451A true GB378451A (en) | 1932-08-09 |
Family
ID=19785620
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB13817/31A Expired GB378451A (en) | 1930-05-10 | 1931-05-09 | Improvements relating to photo-electric devices |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB378451A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106935475A (en) * | 2016-08-03 | 2017-07-07 | 成都青岗科技有限公司 | A kind of high sensitivity inflates ultraviolet phototube |
-
1931
- 1931-05-09 GB GB13817/31A patent/GB378451A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106935475A (en) * | 2016-08-03 | 2017-07-07 | 成都青岗科技有限公司 | A kind of high sensitivity inflates ultraviolet phototube |
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