The system provides complete solution for thin film solar cell production and different manufacturing module.
With Htc's vacuum coating deposition systems, uniform thin-film coatings are deposited on the rolling substrate as it passes through the vacuum chamber. The thin films and other coatings (Front Contact, Window Layer, Absorber, Back Contact) are deposited by physical vapor deposition (PV, PVD, PE-PVD), or sputtering (by either DC, RF, AC or pulsed DC power and evaporation).
Our technologies are designed to optimize the solar cell manufacturing process with excellent uniform coatings, able to be produced in less time, with minimum waste of materials along the way, helping today’s solar cell producers to maximize profits while playing an important role in preserving our global environment.
Features:
The fully-automated thin film coating systems offer the customer a safe and reliable production capacity of up to 20 MW per line, and the following features:
- Single-sided wet chemical coating
- Modular system (simple expandability for increased throughput)
- Reproducible process results
- Integrated automatic dosing and mixing unit
- Integrated spot-free, even drying (dry-in/dry-out)
- Wastewater and exhaust air management system
- Complies with European and U.S. safety standards
- Modular and flexible configuration to meet different production requirements
- Far-infrared heating modules for fast and effective heating of substrates
- Rotational target achieves high target utilization
- No substrate holding carrier design to reduce heat capacity
Benefits
- Low process temperatures
- High system availability
- Max. reduction in chemicals consumption
- Max. reduction of DI water consumption
- MF Rotary Sputtering of Cylindrical Target
- Future expandable for higher throughput
- Fast Deposition and short Tact time
- Easier maintenance and operation
- Optimized Magnetron design for a high target utilization, low deposit formation at the sputter source
- Easy-to-maintain design of the Magnetron surrounding allows for a fast and efficient servicing of
the plant
- Vacuum components and plant control that were tested under industry conditions stand for trouble-free
- Long-term operation
Applications
Photovoltaic cells rely on substances known as semiconductors. Semiconductors are insulators in their pure form, but are able to conduct electricity when heated or combined with other materials. A semiconductor mixed, or "doped," with phosphorous develops an excess of free electrons. This is known as an n-type semiconductor. A semiconductor doped with other materials, such as boron, develops an excess of "holes," spaces that accept electrons. This is known as a p-type semiconductor.
A PV cell joins n-type and p-type materials, with a layer in between known as a junction. Even in the absence of light, a small number of electrons move across the junction from the n-type to the p-type semiconductor, producing a small voltage. In the presence of light, photons dislodge a large number of electrons, which flow across the junction to create a current. This current can be used to power electrical devices, from light bulbs to cell phone chargers.
There are three main types of thin-film solar cells, depending on the type of semiconductor used: amorphous silicon (a-Si), cadmium telluride (CdTe) and copper indium gallium deselenide (CIGS).
Without the expensive and often sparse silicon, the cells are cheaper in terms of materials costs. The non-silicon materials can also be printed on flexible or light substances, which can create new applications for solar. But thin films, aren’t yet as efficient as silicon-based solar, and can remain pricey due to their high production costs.
