| 136 / | HD | BATTERIES: THERMOELECTRIC AND PHOTOELECTRIC |
|
| 243 | DF | PHOTOELECTRIC {2} |
| 252 |  | .~ Cells {12} |
| 253 | DF | .~.~> Radioactive, ionic, or thermo photo |
| 254 | DF | .~.~> Photoemissive, capacitive, magnetic, or ferroelectric |
| 255 | DF | .~.~> Schottky, graded doping, plural junction or special junction geometry |
| 256 | DF | .~.~> Contact, coating, or surface geometry {1} |
| 258 | DF | .~.~> Polycrystalline or amorphous semiconductor |
| 259 | DF | .~.~> With concentrator, housing, cooling means, or encapsulated |
| 260 | DF | .~.~> Cadmium containing |
| 261 | DF | .~.~> Silicon or germanium containing |
| 262 | DF | .~.~> Gallium containing |
| 263 | DF | .~.~> Organic active material containing |
| 264 | DF | .~.~> Selenium or tellurium containing |
| 265 | DF | .~.~> Copper, lead, or zinc containing |