| 释义 |
ˌphotogalˈvanic, a.
Also photo-galvanic.
[f. photo- 2 + galvanic.]
1. = photo-galvanographic; cf. photoelectric a. a.
1852Joubert in Journal Soc. Arts 26 Nov. in Circ. Sc. (c 1865) I. 241/1 This process will be found extremely valuable..for photogalvanic plates.
2. Physics. Designating or utilizing the generation of a potential difference between two electrodes by a photo-chemical reaction in the electrolyte containing them.
1940E. Rabinowitch in Jrnl. Chem. Physics VIII. 551/1 The term ‘photogalvanic effect’ is used in the present series of papers to denote a special case of the so-called Becquerel effect, in which the influence of light on the electrode potential is due to a photochemical process in the body of the electrolyte (as distinct from photo⁓chemical or photoelectric processes in the surface layer of the electrode..). Ibid. 553/2 The top curve shows L [sc. the intensity of illumination] as a function of time... The lower curve represents the simultaneous changes in the potential of a Pt-electrode placed in the solution—the ‘photogalvanic effect’. Ibid. 560 The oxidation-reduction system thionine-iron..provides an extremely sensitive photogalvanic cell. 1956Nature 21 Jan. 110/2 Electrical processes for the direct conversion of radiation to electricity, including thermoelectric generators, photo⁓voltaic cells and p-n junctions and photogalvanic cells. 1976Interdisciplinary Sci. Rev. I. 132/2 The irradiation of an electrode/electrolyte system produces a change in the electrode potential (on open circuit) or in the current flowing (on closed circuit). The cause of this may be a photochemical reaction in bulk solution, the products of which are electroactive, in which case the cell is commonly called a photogalvanic cell. |