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(Chemistry) a cathode that undergoes or is used for photoemission
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˌfoʊ toʊˈkæθ oʊd)

a cathode, typically of a cesium or sodium compound, having the property of emitting electrons when activated by light or other radiation.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.photocathode - a cathode that emits electrons when illuminated
cathode - a negatively charged electrode that is the source of electrons entering an electrical device
electric eye, magic eye, photocell, photoconductive cell, photoelectric cell - a transducer used to detect and measure light and other radiations
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
The beam was created by the plasma photocathode method, in which electrons were released from neutral atoms inside plasma.
Xile Hu's group developed a molybdenum-sulfide catalyst for the hydrogen evolution reaction, while Michael Gratzel's team found that the molybdenum sulfide could be deposited on a copper oxide photocathode to power solar water splitting.
For those passing through one quartz window of the cryostat, the integral glow of the sample (if necessary through an optical filter) was focused by a quartz lens on a photocathode PMT-106.
A photocathode is photoemissive material that emits electrons when exposed to light or other radiation.
When light strikes the intensifier's photocathode, the emitted electrons enter the perforations, ricochet off the tunnel walls, and create more electrons.
Despite the low overall efficiency (less than 0.1%), these results represented in principle a quite remarkable step forward especially in comparison with the modest performance of one of the first p-DSCs that utilized a semiconducting photocathode with compact morphology [330].
The UV sensitive detector is a side-window photomultiplier tube with a bialkali photocathode (model DH10) that employs an analog-to-digital converter (model 228A) to relay spectral irradiance to a dedicated personal computer (PC) for storage.
Moreover, the nanoporous morphology of the p-type electrode permits the adsorption of greater amounts of dye per unit area regarding a compact layer, and favors injection of the charge from the sensitizer to the photocathode in the whole film.
These devices consisted of a photocathode that converted photons into electrons.