dsm khepricoat™ high transmission coating
DESCRIPTION
Discover KhepriCoat™ anti-reflective coating technology for solar modules from DSM that is truly like no other.This revolutionary technology increases the daily performance of solar Photovoltaic (PV) modules by up to 4% and solar thermal modules by up to 8%.For more info please visit www.khepricoat.com or send us email to [email protected]TRANSCRIPT
Introduction to KhepriCoat™
DSM’s Anti-Reflective glasscoating technology
Page 2
Introduction to KhepriCoat™ - DSM’s Anti-Reflective glass coating technology
Introducing DSM
Royal DSM N.V. uses its competences in life sciences and materials sciences to create solutions that nourish, protect and improve performance
•Annual net sales of € ~9 billion•Locations in five continents•~ 24,000 employees•Leader in the Dow JonesSustainability World Index
Page 3
Introduction to KhepriCoat™ - DSM’s Anti-Reflective glass coating technology
Why use anti-reflectivecoatings on solar cover glass?
• About 4% of the light hitting the glass of a solar modules is reflected and thus lost for electricity production.
• Reflections can be reduced and thus light transmission can be increased by using antireflective (AR) coatings.
• The higher electricity output results in a reduction of the cost per Wp!
• ‘Traditional’ AR coatings are either expensive or have to compromise on the balance optical vs mechanical properties.
• DSM has developed a unique single layer AR coating which minimizes reflection without compromising on the durability.
• DSM’s AR coating technology is marketed under the brand-name KhepriCoat™ and is available via a licensing model
Page 4
Introduction to KhepriCoat™ - DSM’s Anti-Reflective glass coating technology
Why is KhepriCoat™ differentfrom traditional AR coatings?
In contrast to ‘traditional’ AR coatings, the DSM AR coating has a closedsilica-based structure with a high internal nano-porosity
•Voids are formed in the coating layer by using core-shell particles with a silica shell•The voids between the particles are completely filled with a solid silica-based binder giving a very strong bond•The closed and smooth surface for excellent durability, mechanical properties and cleanability
Page 5
binder
Solid silica particles
Glass substrate Glass substrate
Coating layer(100-150 nm)
“Traditional” AR coating
KhepriCoat™ AR coating
Introduction to KhepriCoat™ - DSM’s Anti-Reflective glass coating technology
KhepriCoat is a very versatileAR coating technology
• The technology is suitable for use on all types of PV and solar thermal modules
• The coating can be applied 1- and 2-sided• DSM’s AR coating can be applied by various coating technologies,
like dip, roll, spray or slot-die coating• DSM’s AR coating can be applied on both (ultrawhite) float glass
and structured/patterned glass• The coating can be cured in the temper step
Page 6
SEM picture to demonstrate the closed surface structure
Introduction to KhepriCoat™ - DSM’s Anti-Reflective glass coating technology
KhepriCoat™: DSM’s AR coatingfor solar cover glassTransmission curves for 2-sided coated 4 mm ultrawhite float glass
• Maximum gain in transmission up to 8%• Average gain in transmission up to 6% (depending on the
wavelength range) at perpendicular angle
Page 7
80
82
84
86
88
90
92
94
96
98
100
350 450 550 650 750 850 950
Wavelength (nm)
Tra
ns
mit
tan
ce
(%
)
Khepricoat
Khepricoat uncoated
80
82
84
86
88
90
92
94
96
98
100
300 800 1300 1800 2300
Wavelength (nm)
Tra
ns
mit
tan
ce
(%
)
Khepricoat
Khepricoat uncoated
Introduction to KhepriCoat™ - DSM’s Anti-Reflective glass coating technology
KhepriCoat™: DSM’s AR coatingfor solar cover glassTransmission curves for 1-sided coated 4 mm float and patterned glass
• Maximum gain in transmission (perpendicular) up to 4% for 1-sided coatings
• Average gain in transmission up to 3% (depending on wavelength range)
Page 8
Transmission Single side Khepricoat(TM) on 4mm Pilkington Optiwhite
88
89
90
91
92
93
94
95
96
350 400 450 500 550 600 650 700 750 800 850
Wavelength [nm]
% T
ran
sm
iss
ion
0
0,5
1
1,5
2
2,5
3
3,5
4
4,5
% g
ain
[re
d l
ine
]
Uncoated
With 1-side Kherpicoat(TM)
% gain
% gain (2nd Y-axis)
Transmission single side Khepricoat(TM) on 4mm SG Albarino-T
88
89
90
91
92
93
94
95
96
350 400 450 500 550 600 650 700 750 800 850
Wavelength [nm]
% T
ran
sm
iss
ion
-1
-0,5
0
0,5
1
1,5
2
2,5
3
3,5
4
4,5
% g
ain
[re
d l
ine
]
Uncoated
With 1-side Kherpicoat(TM)
% gain
% gain (2nd Y-axis)
Introduction to KhepriCoat™ - DSM’s Anti-Reflective glass coating technology
Optical Performance:Angle-Dependent Transmission
• The gain in transmission increases at higher angles of incidence to almost 10% (green line)!
• The highest gain in transmission is obtained at angles above 30 degrees
Page 9
Transmission - Angle Dependency
80
85
90
95
100
0 10 20 30 40 50 60 70
Angle of incidence [deg]
Av
era
ge
tra
ns
mis
sio
n 3
70
-80
0 n
m [
%]
6
7
8
9
10
Tra
ns
mis
sio
n g
ain
(%
)
uncoated glass
AR-coated glass
Transmission gain
Introduction to KhepriCoat™ - DSM’s Anti-Reflective glass coating technology
Performance of PV-modules coated with KhepriCoat™
Module tests performed at Photovoltaik Institut Berlin (www.pi-berlin.com)
•Passed all tests according to IEC 61215 (damp-heat, humidity-freeze, thermal cycling and others)•TüV certification for commercial modules with KhepriCoat™ AR coating obtained•No degradation visible during damp-heat test for 2000 hours (twice the IEC test norm)•Up to 3% performance increase at normal angle of incidence (flash test)•up to 5% performance increase at 60 degrees angle of incidence (flash test)
Page 10
Introduction to KhepriCoat™ - DSM’s Anti-Reflective glass coating technology
KhepriCoatTM was used for the world record 17% efficiencyfor multi-crystalline Si solar panels
Page 11
Page 12
Khepri is the name of one of the major Gods in ancient Egyptian mythology. He was believed to push the sun across the sky and is responsible for the dawn. This name was chosen as sunrise and sunset are the times when the benefits of KhepriCoat™ offer the highest yield increase versus normal solar glass.
