Cells wherein radiation is applied to the junction of different semiconductor materials
G21H 1/08
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Cells in which radiation ionises a gas in the presence of a junction of two dissimilar metals, i.e. contact potential-difference cells (discharge tubes Fulltext... Hierarchy... Expanded...H01J)
Cells using conversion of the radiation into light combined with subsequent photoelectric conversion into electric energy
G21H 3/00
Arrangements for direct conversion of radiation energy from radioactive sources into forms of energy other than electric energy, e.g. light (lasers Fulltext... Hierarchy... Expanded...H01S 3/00)
G21H 3/02
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in which material is excited to luminesce by the radiation (lamps in which a gas filling or screen or coating is excited to luminesce by radioactive material structurally associated with the lamp Fulltext... Hierarchy... Expanded...H01J 65/00)