Cadmium telluride vs Polysilicon
Cadmium telluride and Polysilicon are genuine alternatives to one another — a choice somebody actually makes — and differ on 2 measured properties, density most clearly.
Cadmium telluride vs Polysilicon
These are different kinds of thing (compound, material). Fewer properties mean the same thing across both, so a like-for-like reading may not be available.
Cadmium telluride
CdTe
A semiconductor that absorbs sunlight in a layer a few microns thick — the only thin-film solar technology to have taken serious market share from silicon.
Polysilicon
Silicon purified to nine or eleven nines — the traded commodity the entire solar industry rests on, and the most energy-intensive step in making a panel.
| Property | Cadmium telluride | Polysilicon |
|---|---|---|
| Density | 5.85 g/cm³ higher | 2.33 g/cm³ |
| Melting point | 1092 °C | 1414 °C higher |
Choosing between them
Polysilicon is recorded as a substitute for Cadmium telluride — less supply-constrained.
What it gives up: Uses roughly a hundred times more semiconductor per panel and far more energy to purify it, which is why the thin film holds a steady minority share rather than losing outright.
In this application, on the evidence cited above.