Monocrystalline
Solar cell type made from single-crystal silicon with high efficiency and a characteristically dark, uniform surface.
Also known as: Monocrystalline Solar Cell, Mono-Si
What Does Monocrystalline Mean?
Monocrystalline solar cells are made from a single, uniformly grown silicon crystal. They are manufactured using the Czochralski process, in which a seed crystal is slowly drawn from a silicon melt. The result is a high-purity material with an ordered crystal structure.
Properties
| Property | Value |
|---|---|
| Efficiency (module) | 20—24% |
| Appearance | Dark, uniformly black |
| Temperature coefficient | approx. -0.3 to -0.4%/°C |
| Market share (2024) | approx. 95% |
| Lifespan | 25—30+ years |
Advantages over Polycrystalline
- Higher efficiency for the same area
- Better low-light performance
- More uniform, aesthetically appealing appearance
- Longer performance warranties common
Further Developments
Monocrystalline cells form the basis for modern high-performance technologies such as PERC, TOPCon, and HJT. Through additional passivation layers and optimised contact structures, ever higher efficiencies are achieved.
Practical Tip
Monocrystalline modules are the standard today and have almost entirely displaced polycrystalline modules from the market. For new installations, there is hardly any reason to choose other technologies.
Related Terms
Polycrystalline
Solar cell type made from multi-crystalline silicon with a bluish appearance and slightly lower efficiency than monocrystalline cells.
Solar Cell
Semiconductor device that converts sunlight directly into electrical current through the photoelectric effect.
PERC
Passivated Emitter and Rear Cell -- cell technology with an additional passivation layer on the rear side for higher efficiency.
TOPCon
Tunnel Oxide Passivated Contact -- advanced cell technology with a tunnel oxide layer achieving efficiencies above 24%.
HJT (Heterojunction)
Heterojunction cell technology combining crystalline and amorphous silicon, achieving very high efficiencies.
Efficiency
Ratio of usable electrical energy to incident solar energy -- indicates the effectiveness of a solar cell or system.