Adaptive and innovative glass for PV and special applications

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1 EUROGLAS PV Flat and EUROGLAS PV Hy TCO Adaptive and innovative glass for PV and special applications

2 Base glass The material glass has a long tradition and will have an excellent future. The outstanding technical properties make it an ideal building material. For more than 4000 years glass has been produced with the raw materials quartz, sand, lime and soda. The production process is being constantly developed. By means of innovative coating technologies, the properties of glass are influenced to meet the photometric requirements of today and in the future. Base glass Type of glass Float glass EUROFLOAT Extra white float glass EUROWHITE Solar Remarks Properties* Light transmission in %* Tvis DIN EN 9050 Energy transmission in %* Tsol DIN EN 9050 Mechanical characteristics annealed 45 DIN EN 572 Mechanical strength in MPa toughened 70 DIN EN 1863 tempered 120 DIN EN Young modulus in Gpa DIN EN 572 Poisson ratio Moh (scratch hardness) 5-6 units Hardness Knoop (idention hardness) ca. 470 HK 0.1/20 Density in kg/m³ Expansion coefficient *10-7K C Thermal conductivity in W/mK 1 DIN EN 572 Chemical properties of glass* SiO 2 in % 72 NaO in % 14 CaO in % 9 MgO in % 4 AL203 in % <1 Fe2O3 in % <0.02 * All values refer to 3.2 mm glass This specification defines the general properties of the uncoated solar glass, which is used in the PV (back glass/ front glass) and solar thermal industry. All properties that are either not included in this document or may differ from this document have to be defined by separate specification in agreement with EUROGLAS and the customer. 2

3 Solar glass solar energy for a better future Green energy is on the rise and not only since the nuclear disaster. There is a great potential for the future to produce energy from our given natural resources like wind and sun. In times of dwindling resources the inexhaustible power of the sun represents the environmentally consciousness in respect of energy production. The production of solar modules differs with regard to the absorbing material. There are two main technology groups on the market: crystalline silicon (c-si) and thin film (CdTe/CIS, CIGS/a-Si/µ-Si). Solar glass from EUROGLAS suits both applications and is optimized for thin film technology. In the solar module, production glass is used as the front cover and the back cover. Long-term stability and consistency rep- resent the two main features of glass. Therefore, it meets the requirement to protect the sensitive absorber. The efficiency of a solar module plays a decisive role for the customers buying decision. This factor can be enhanced by a higher light transmission of front glass through the application of a special coating. More light comes into the module, consequently more energy comes out of it. In addition we offer an adjusted barrier layer in order to seal the glass and improve the resistance against environmental influence Simplified construction of a solar module Front glass Barrier layer TCO coating PV absorber Back glass EUROGLAS PV Flat EUROGLAS PV Hy TCO Customer EUROGLAS PV Flat 3

4 EUROGLAS PV Flat Custom-made quality and processing Dimensions For further processing there is a choice between base glass EUROFLOAT and high transmission glass EUROWHITE Solar. Next to the standard float glass EUROWHITE Solar impresses for having a significantly low iron rate which results in a light transmission of more than 91.5% and therefore the energy yield of the module increases x mm x mm EUROGLAS PV Flat adapts to the individual needs of every customer. Our experienced glass experts can conduct the following four steps: Cutting and processing of base glass is possible up to a maximum dimension of 2.600x mm with an available thickness from 2.5 to 8.0 mm Grinding can be optimized individually by the customer and selected between broken edge and c,-or k-type Drilling is possible to custom-made diameter, quantity and position A special production process creates an ultra-plain tempered glass with extremely low distortion and a high mechanic strength Three options for the separation of glass are available x mm x mm 630 x mm 550 x 550 mm Example formats Tolerances < 0,5 mm Solar glass from EUROGLAS is perfect for integration with a module, especially because of the diversity. High mechanic strength and durability are outstanding advantages which can be applied in all technologies and applications. Whether in building integrated PV or huge solar parks, full size dimensions of x mm are possible.

5 Proceed glass - EUROGLAS PV Flat Type of glass Floatglas Extra white float glass Extra white float glass EUROFLOAT EUROWHITE Solar EUROWHITE Solar Remark Glass thickness in mm Minimum 500 x x x 500 Dimension in mm Maximum x x x Application Frontglas für PV / solar thermal Backglass for PV / Glass for green houses Solar thermal Thermal solar collectors Properties Light transmission in % Tvis DIN EN 9050 Energy transmission in % Tsol DIN EN 9050 Processing Edge KGN (C- or K-edge), KGS Custom request Corners Bumped Hole in mm 4 <> 50/60 Position and size individual Mechanical characteristics Safety glass tempered (ESG) / heat strenghtened (TVG) Custom request Stacking Separation powder, paper, twine Custom request This specification defines the general properties of the uncoated solar glass, which is used in the PV (back glass/ front glass) and solar thermal industry. All properties that are either not included in this document or may differ from this document have to be defined by separate specification in agreement with EUROGLAS and the customer. 5

6 EUROGLAS PV Hy TCO The excellent features of the coated solar glass are the result of the combination of the optical and electrical parameters. An increase in the trapped light for optimized light scattering is possible due to an adaptable Haze. The distribution can vary optionally between 0 % and 90 %. Customer could choose the specific distribution. EURO- GLAS applies the electric conductive material aluminum zinc oxide for TCO coating. The processing is carried out offline which allows a high degree of flexibility by adjusting the main parameters of transmission and sheet resistance (feasible range between 4 to 20 ohm) To improve the long-term stability of solar glass a barrier coating can be applied. The silicon oxide barrier layer avoids the cationic diffusion from glass in the coating sys- tem. Furthermore, it helps to protect the sensitive coating and makes it more resistant and conductive. High transparency and light scattering-custom layers To reach high efficiency and get the optimum energy of the sun for PV Modules, the front glass has to fulfill major requirements. Using EUROGLAS PV HY TCO the power of the module increases significantly. TCO means Transparent Conductive Oxide, a transparent and electrically conductive layer for thin film modules. EUROGLAS PV HY TCO enables the module producers the possibility of differentiation for a highly competitive market. TCO coating is custom-made to the individual process. The very flat surface of EUROWHITE Solar amplifies the aesthetic look of the module. 6

7 Electrically conductive glass - EUROGLAS PV Hy TCO Specifications Examples EUROFLOAT or Extra white float glass Extra white float glass Floatglas Type of glass EUROWHITE Solar EUROWHITE Solar EUROWHITE Solar EUROFLOAT Thickness in mm 2.0 / 3.2 / 4.0 / Minimum 500 x x x x 500 Dimensions Maximum x x x x 300 Front contact for silicon thin-film photovoltaics (a-si, a-si/a-si tandem, a-si/µc-si tandem, triple, ), CdTe, Circuit boards, OLED, SMART glass a-si/a-si a-si/µc-si OLED switchable glass Properties Tvis** to 89 88* 87* 86 Light transmission in % T*** to 87 86* 85* 81 Energy transmission in % Tsol to 77 76* 75* 76 Mechanical characteristics Safety glass ESG/TVG selectable Coating properties Sheet resistance in Ω Haze (int) in % 0 (untextured) (450 nm) (850 nm) Barrier layer Yes Textured Yes Yes No Texture**** *Measured with CH2I2, ** to DIN EN 410, ***wavelength range nm, **** edge length 10 x 10 µm 2 Application: a-si = amorph Silizium, a-si/ a-si = amorph Silizium, a-si/ µ-si = tandem cell, OLED = Organic Light Emitting Diode, Smart Glass = Switchable glass Reference: Sunfilm 7

8 Special application Conductive glass for innovative future technologies Switchable glass The usage of coated glass is not restricted to the solar business. It also allows for a wide range of applications, because of the variably adaptable optical and electrical parameters. OLED-area light source Shading of spaces and buildings without additional blinds is possible by the electro chrome effect. EUROGLAS zinc oxide coating is best suited for this application. Features of coated glass are high transmission and excellent conductivity. The conductivity of the coated glass is used to create light in an energy-saving and aesthetic manner. OLED is the name for Organic Light Emitting Diodes, the light source for the next gen- eration. In the future it could be possible to have a store window which can be either transparent or also used as a display. Furthermore, the application as a room divider with light tiles is conceivable. EUROGLAS PV Hy TCO is coated with zinc oxid. Due to the low sheet resistance, high transmission and surface roughness it meets all requirements for an mum carrier glass for OLED. PCB-printed circuit boards of glass opti- In the future the electronic market will need more and more pow- erful components. Thereby the imagination for glass applications is limitless, from touch lights to LED lights to glass displays to name only a few. The material glass is superior in hygienic, size, design, functionality and lifespan compared to related products. Silicon-based barrier layers The durability of glass depends on surrounding environmental influences. EUROGLAS offers a special silicon-based coating which increases enormously the long-term stability. This barrier layer prevents the glass from corrosion. Reference: Osram Reference: econtrol 8

9 EUROGLAS solar glass at a glance Advantages EUROGLAS PV Flat Application of thinner foils during further processing Substantial cost saving with an encapsulating material Accurate laser scribing due to excellent distortion Long-term glass expertise and consultant competence Advantages EUROGLAS PV Hy TCO Considerable increase of technical performance Improvement of cell efficiency by surfacing texturing Additional polishing requirement becomes unnecessary and therefore offers substantial cost savings Optimal light transmission with ultra transparent EUROWHITE Solar Individual adjustment to the type of absorber Integrated barrier layer prevents corrosion of glass Safety glass is optionally available Full scale coating up to x mm 9

10 Production and quality Front and back glass out of one-side EUROGLAS has long term glass expertise in all glass processes. The Company is a subsidiary of the Swiss Glas Troesch Group which has over a 100 years of history, tradition and experience in the production and handling of glass. Since 1997 float glass has been produced in Haldensleben. Solar glass is a part of the EUROGLAS family since The supply of glass from the self-contained glass plant guarantees optimal delivery times. A team of specialists monitor the quality from base glass through to the coated end product. Our glass experts will support you with regard to quality questions as well. The highly precise production process complies with the European quality standards. The Know-How of our employees and modern production equipment is represented by our high quality products. Glass is fabricated to the DIN standard and the specific customer requirement. Modern inspection systems supervise the production around the clock. An optional 2D Code can be stamped on every sheet of glass. This guarantees transparency in the whole value chain. EUROGLAS is certificated to ISO 9001 and from TÜV. Reference: Panasonic 10

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12 Adresses to contact TA WERBEAGENTUR 11/2011 Euroglas GmbH, D Haldensleben Tel (0)3904/638-0, Fax ++49 (0)3904/ Presented by: