anti-reflective coating TT

• Performance increase for PV-modules + 3 % (one-sided, AM 1.5, 300 nm to 1200 nm)
• Performance increase for Solar-Thermal applications + 5 % (two-sided, AM 1.5, 300 nm to 2500 nm)
• Improved incident angle modifier (IAM) > improved yield!
• Closed pure silica surface for excellent mechanical properties
• Excellent proven durability
• Uniform optical appearance
• Different surface structure with AR-coating:

 

 

 

  

	Solar transmittance for PV		Solar transmittance thermal collectors
	%, AM1.5, 300 nm - 1200 nm		%, AM1.5, 300 nm - 2500 nm
SILK 3,2 one-sided	94,9	(+ 2,9 %)*	94,0	(+ 2,4 %)*
SILK 3,2 two-sided	-		96,7	(+ 5,1 %)*
SILK 4,0 one-sided	94,8	(+ 2,9 %)	93,9	(+ 2,3 %)
SILK 4,0 two-sided	-		96,6	(+ 5,0 %)

* Measurement Institut für Solartechnik SPF, Rapperswil, Switzerland

 

 

Durability:

Long-term performance through unique closed pore nanostructure.

The advantage of the closed and smooth surface is the sharply reduced risk of hydrolysis –that means no water molecule penetration into the surface.

 

 

 

 

 

Proven durability in the laboratory and in-situ on life-sized modules:

Test	Description	ΔƬ [%]
Abrasion resistance (EN 1096-2)	Felt rubbing	– 0,33 %
Immersion test	Immersion in 85ºC water for 100 hours	+ 0,22 %
Immersion test saline	Immersion in 35ºC salt solution (50 g NaCl per liter) for 100 hours	+ 0,05 %
Immersion test	Acid immersion in 35ºC acid solution (0,1 M H2SO4) for 100 hours	+ 0,05 %
Vapor test	Exposure to water vapor	– 0,21 %
Damp-heat test (IEC 61215)	Exposure to 85ºC, 85% humidity for 1000 hours	– 0,53 %
Thermal cycling test (IEC 61215)	200 cycles from -40ºC to 85ºC	– 0,12 %
Humidity-freeze test (IEC 61215)	10 cycles from 85ºC, 85% humidity to -40ºC	– 0,50 %

 

 

 

 

 

Red line: two-sided for thermal collectors blue line: one-sided for PV-modules 

black line: no coating