Method for processing a lithium-sodium-antimony photocathode

Details Method for processing a lithium-sodium-antimony photocathode Method for processing a lithium-sodium-antimony photocathode

1981-06-30

1983-10-04

Smith, John D.

Coating processes

Electrical product produced

Photoelectric

445 9, 445 10, 445 11, 445 12, 445 13, 445 14, 445 15, 445 16, 445 17, H01J 3900

Patent

active

044078579

ABSTRACT:
A method is provided for making a lithium-sodium-antimony photocathode including the step of forming a base layer including antimony on a substrate. Sodium is then deposited onto the base layer at an elevated temperature to a first peak value of responsivity, thereby forming a sodium-antimony surface. Next, at room temperature, lithium is deposited onto the substrate containing the sodium-antimony surface until the lithium-sodium-antimony photocathode develops a hazy brown color. The photocathode is sensitized by heating the substrate to an elevated temperature until a second peak value of responsivity, greater than the first peak value, is obtained. Antimony, sodium and lithium are then alternately deposited on the photocathode in order to stabilize the second responsivity peak.

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A. Sommer, Photoemissive Materials, Wiley and Sons, Inc., 1968, pp. 108-114.

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