What is Ultrasonic Solar Cell Spraying?

 

Ultrasonic spray is a unique spray technology, which is based on ultrasonic spray nozzle technology. The material sprayed is first in a liquid state, which can be a solution, sol, suspension, etc. The liquid coating is first atomized into fine particles through an ultrasonic atomization device, and then uniformly coated on the surface of the substrate with a certain amount of current carrying gas, forming a coating or thin film. Compared to traditional pneumatic two fluid spraying, ultrasonic atomization spraying can achieve better uniformity, thinner coating thickness, and higher accuracy. Meanwhile, due to the fact that ultrasonic nozzles do not require air pressure assistance to atomize, the use of ultrasonic spraying can significantly reduce paint splashing during the spraying process, achieving the goal of saving paint. The paint utilization rate of ultrasonic spraying is more than four times that of traditional two fluid spraying.

 

 

Principle:

 

It is achieved by converting high-frequency sound waves into mechanical energy through piezoelectric transducers, and then converting mechanical energy into liquid. This vertical upward and downward vibration generates standing waves in the liquid film at the tip of the ultrasonic spraying equipment manufacturer's nozzle, where the amplitude of these waves can be controlled by a power generator. These stationary liquid waves can extend upwards from the top of the ultrasonic nozzle, and when the droplets leave the atomization surface of the nozzle, they are decomposed into fine mist of uniform micrometer or even nanometer sized droplets.

 

 

Applied to solar cell coatings:

 

Ultrasonic spraying technology can successfully deposit anti reflective layers, TCO coatings, buffer layer coatings, PEDOT, as well as active layers in the manufacturing of thin film and perovskite solar cells. OPV,CIG,CdTE,CzT, Perovskite and DSC are solutions and suspensions that can be deposited using ultrasonic wet spraying technology in the manufacturing of thin film solar cells. As a small part of the cost of CVD and sputtering equipment, the ultrasonic atomization nozzle system reduces the cost per watt of manufacturing thin film solar cells while still providing high battery efficiency.

The ultrasonic spraying machine is a small part of the cost of sputtering and CVD equipment, and the system is used for the research and development of perovskite spraying and other thin film solar manufacturing applications. Ultrasonic spraying technology, as a feasible method to upgrade to larger and higher capacity thin film solar manufacturing, is constantly gaining recognition. The validated R&D process plays an important role in the large-scale manufacturing of solar cell technologies and thin film solar cell coatings for many different layers and types.

 

 

Quantum dot:

 

Nanocrystalline semiconductor dots contain Zn, Pb, Cd, and Se. The advantages of ultrasonic spraying include a significant reduction in capital equipment costs for initial investment, depolymerization of suspended particles during the spraying process, validated scalable production solutions that can be transferred from research and development to production through online processing, and up to 95% transfer efficiency, reducing the consumption of expensive raw materials.

 

Advantages of coating for solar cells:

1. The spray pattern is easy to shape and suitable for coating applications of solar cells.

2. It can spray any shape of object to form a uniform micron level coating.

3. Self cleaning, non clogging ultrasonic nozzles can reduce downtime in critical manufacturing.

4. With ultra-low flow capacity, it can work intermittently or continuously.

5. The highly controllable spray amount makes the spraying quality more reliable.

6. Low energy consumption, high atomization efficiency, and minimal restrictions on atomized liquids.

7. High transmission efficiency, which can reduce waste and air pollution caused by reverse spraying, and save a lot of costs.

8. No pressure, no noise, and no wear on moving parts.

9. The spray ice dragon is made of titanium alloy material, which has the characteristics of high strength and corrosion resistance.

10. Low maintenance time, further improving productivity.

11. High precision pressure reducing valve and liquid control valve, achieving gas-liquid coordination at various speeds. (Complete machine)

12. Use laser alignment to quickly align the spraying position. (Complete machine)

13. It can work at high temperatures of several hundred degrees and is used for coating solar cells, with a simple process and high efficiency