DE1234873B - Method of manufacturing a photocathode - Google Patents
Method of manufacturing a photocathodeInfo
- Publication number
- DE1234873B DE1234873B DE1952Z0003156 DEZ0003156A DE1234873B DE 1234873 B DE1234873 B DE 1234873B DE 1952Z0003156 DE1952Z0003156 DE 1952Z0003156 DE Z0003156 A DEZ0003156 A DE Z0003156A DE 1234873 B DE1234873 B DE 1234873B
- Authority
- DE
- Germany
- Prior art keywords
- antimony
- bismuth
- layer
- alkali metal
- base
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/02—Manufacture of electrodes or electrode systems
- H01J9/12—Manufacture of electrodes or electrode systems of photo-emissive cathodes; of secondary-emission electrodes
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Common Detailed Techniques For Electron Tubes Or Discharge Tubes (AREA)
Description
Verfahren zur Herstellung einer Photokathode Die Erfindung betrifft ein Verfahren zur Herstellung einer Photokathode, die aus einer Legierung oder intermetallischen Verbindung von Antimon oder Wismut mit einem Alkalimetall besteht, bei dem zunächst eine Antimon- oder Wismut-Schicht auf eine Unterlage aufgebracht wird und dann die Unterlage mit der Schicht der Einwirkung eines Alkalimetalls ausgesetzt wird.Method of Making a Photocathode The invention relates to a method of manufacturing a photocathode made of alloy or intermetallic There is a compound of antimony or bismuth with an alkali metal, in which initially an antimony or bismuth layer is applied to a base and then the Underlay with the layer is exposed to the action of an alkali metal.
Derartige Verfahren sind bekannt. Als Metall geringer Leitfähigkeit wird Antimon oder Wismut verwendet. Die zweite Legierungskomponente kann beispielsweise aus Cäsium bestehen. Bekanntlich weisen die Alkalimetalle ein besonders großes Atomvolumen auf, was zur Folge hat, daß die Durchmischung mit dem Metall geringer Leitfähigkeit nicht vollständig ist, so daß die Legierung weniger Alkalimetall enthält, als zur Herstellung einer Photozelle hoher Empfindlichkeit erforderlich ist. Die Ursache dieser geringeren Aufnahmefähigkeit ist darin zu sehen, daß sie bei den bisher üblichen Auftragsverfahren als dichte, metallisch glänzende Schicht erhalten wird.Such methods are known. As a metal of low conductivity antimony or bismuth is used. The second alloy component can, for example consist of cesium. It is known that the alkali metals have a particularly large atomic volume on, which has the consequence that the mixing with the metal of low conductivity is not complete, so that the alloy contains less alkali metal than for Manufacture of a photocell of high sensitivity is required. The cause this lower capacity is to be seen in the fact that it is common to the hitherto usual Application method is obtained as a dense, shiny metallic layer.
Um die Aufnahmefähigkeit der Metallschicht der Photokathode zu erhöhen, wird gemäß der Erfindung die Antimon- oder Wismut-Schicht in einer inerten Atmosphäre bei einem Druck von 0,1 bis 30 mm Hg auf die Unterlage aufgedampft. Die Gasatmosphäre kann z. B. aus Argon, aus einem Gemisch aus Argon und Wasserstoff oder aus Wasserstoff allein bestehen.To increase the absorption capacity of the metal layer of the photocathode, According to the invention, the antimony or bismuth layer is in an inert atmosphere vapor-deposited onto the substrate at a pressure of 0.1 to 30 mm Hg. The gas atmosphere can e.g. B. from argon, from a mixture of argon and hydrogen or from hydrogen exist alone.
Die Aufnahmefähigkeit der Metallschicht der Photokathode kann auch durch ein elektrolytisches Auftragsverfahren erhalten werden, und zwar gemäß der Erfindung dadurch, daß die Antimon- oder Wismut-Schicht durch die Elektrolyse bei einer Stromdichte von mehr als 0,05 A/cm2 auf die Unterlage aufgebracht wird.The absorption capacity of the metal layer of the photocathode can also can be obtained by an electrolytic deposition process according to FIG Invention in that the antimony or bismuth layer by the electrolysis a current density of more than 0.05 A / cm2 is applied to the substrate.
Mit den beschriebenen Verfahren können Photozellen mit einer wesentlich höheren Empfindlichkeit hergestellt werden als bisher; ihre Aktivierungszeit wird durch diese Maßnahmen verkürtzt, so daß sich diese Verfahren für eine Massenproduktion von Photozellen besonders eignen.With the methods described, photocells with a significantly higher sensitivity can be produced than before; their activation time will be shortened by these measures, so that these processes are suitable for mass production photocells are particularly suitable.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1952Z0003156 DE1234873B (en) | 1952-12-13 | 1952-12-13 | Method of manufacturing a photocathode |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1952Z0003156 DE1234873B (en) | 1952-12-13 | 1952-12-13 | Method of manufacturing a photocathode |
Publications (1)
Publication Number | Publication Date |
---|---|
DE1234873B true DE1234873B (en) | 1967-02-23 |
Family
ID=7618747
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE1952Z0003156 Pending DE1234873B (en) | 1952-12-13 | 1952-12-13 | Method of manufacturing a photocathode |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE1234873B (en) |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT135959B (en) * | 1932-03-14 | 1933-12-27 | Max A E Pressler | Photocell with external photoelectric effect. |
FR840976A (en) * | 1937-07-22 | 1939-05-08 | Special photo-sensitive layer photocell | |
DE710006C (en) * | 1928-09-25 | 1941-09-01 | Philips Patentverwaltung | Method of manufacturing a photoelectric cell |
DE717810C (en) * | 1928-01-28 | 1942-02-23 | Rudolf Suhrmann Dr | Photoelectric cell |
CH228761A (en) * | 1941-11-12 | 1943-09-15 | Philips Nv | Electron tube with a photocathode and a secondary emission electrode, and a method for manufacturing such a tube. |
DE744768C (en) * | 1938-07-17 | 1944-01-25 | Fernseh Gmbh | Process for the vapor deposition of metals on several photo and / or secondary emission electrodes to be treated differently located in the same vessel and arrangement for its implementation |
DE864585C (en) * | 1936-07-04 | 1953-01-26 | Zeiss Ikon Ag | Photo- or secondary emission-sensitive electrodes |
-
1952
- 1952-12-13 DE DE1952Z0003156 patent/DE1234873B/en active Pending
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE717810C (en) * | 1928-01-28 | 1942-02-23 | Rudolf Suhrmann Dr | Photoelectric cell |
DE710006C (en) * | 1928-09-25 | 1941-09-01 | Philips Patentverwaltung | Method of manufacturing a photoelectric cell |
AT135959B (en) * | 1932-03-14 | 1933-12-27 | Max A E Pressler | Photocell with external photoelectric effect. |
DE864585C (en) * | 1936-07-04 | 1953-01-26 | Zeiss Ikon Ag | Photo- or secondary emission-sensitive electrodes |
FR840976A (en) * | 1937-07-22 | 1939-05-08 | Special photo-sensitive layer photocell | |
DE744768C (en) * | 1938-07-17 | 1944-01-25 | Fernseh Gmbh | Process for the vapor deposition of metals on several photo and / or secondary emission electrodes to be treated differently located in the same vessel and arrangement for its implementation |
CH228761A (en) * | 1941-11-12 | 1943-09-15 | Philips Nv | Electron tube with a photocathode and a secondary emission electrode, and a method for manufacturing such a tube. |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE1089483B (en) | Process for the manufacture of a cathode for an electrical discharge tube | |
DE1764681A1 (en) | Rotating anode for X-ray tubes | |
DE2358574A1 (en) | METHOD OF MANUFACTURING COLORED GLASS OBJECTS | |
DE1234873B (en) | Method of manufacturing a photocathode | |
DE1220937B (en) | Method for producing an electrolytic capacitor with a sintered body made of titanium | |
DE1269253B (en) | See-through photocathode | |
DE673505C (en) | Process for the production of compact metal bodies | |
DE836533C (en) | Process for the manufacture of secondary emitting electrodes | |
GB527618A (en) | A process for the production of sintered bodies of light metals | |
DE868026C (en) | Process for the production of an electrode for an electrical discharge vessel that does not serve as a glow cathode | |
DE845338C (en) | Production of magnesium-aluminum-hydride | |
DE2256739A1 (en) | Valve metal-manganese dioxide electrolytic condenser - mfd by depositing manganese nitrate on anode body and by heating in presence of nitric acid and manganese dioxide powder | |
DE852452C (en) | Alloy of gold and an alkali metal | |
AT133124B (en) | Sintered carbide alloys containing borearbide for implements and tools and processes for their manufacture. | |
DE717810C (en) | Photoelectric cell | |
DE706980C (en) | Process for the production of largely free metal contacts on electrical semiconductors | |
DE3314668C2 (en) | ||
DE756337C (en) | Material for electrical contacts | |
DE974826C (en) | Process for the production of secondary emitting layers | |
DE852988C (en) | Process for the production of cobalt carbonyl hydrogen and optionally cobalt carbonyl | |
DE677996C (en) | Process for improving the compressibility of powder mixtures | |
DE593491C (en) | Process for the production of cold cathodes for electric gas discharge tubes | |
DE1813767C (en) | Method for producing a supply cathode for electrical discharge vessels | |
DE695029C (en) | Arrangement for converting radiation energy into electrical energy | |
DE454646C (en) | Process for the production of chemically pure aluminum |