Ultrasonic Photovoltaic Cell Spraying

Dec 31, 2024

Ultrasonic Spray Coater 3 -

Ultrasonic spraying is a unique atomization technology based on ultrasonic atomization nozzle technology. The sprayed material is first in a liquid state, which can be a solution, sol, suspension, etc. The coated liquid is atomized into small particles by an ultrasonic atomization device, and then uniformly coated on the surface of the substrate by a certain amount of carrier gas, thereby forming a coating or coating film. Compared with traditional pneumatic dual fluid spraying, ultrasonic atomization spraying has better uniformity, thinner coating thickness, and higher accuracy. Meanwhile, since ultrasonic nozzles do not require air pressure for atomization, the use of ultrasonic spraying can greatly reduce the spraying process of raw material splashing, achieving the goal of saving raw materials. Coatings sprayed with ultrasonic spraying are more than four times that of traditional two fluid spraying.

Ultrasonic nozzles use piezoelectric transducers to convert high-frequency sound waves into mechanical energy for longitudinal high-frequency vibration. The liquid wave extends upwards from the tip of the ultrasonic nozzle until it is separated into uniformly sized droplets. The secondary molding gas or surrounding air can easily wrap the droplets into the desired shape and speed, thus achieving various spraying applications.

Ultrasonic Spray Coater 2

China has become a major global producer of solar cells. In 2006, the national production of solar cells was 438MW, and in 2007, the national production of solar cells was 1188MW. China has become the world's largest producer of solar cells, surpassing Europe and Japan. The production continued to increase in 2008, reaching 2 million kilowatts.

Solar photovoltaic cells (PV cells for short) are used to directly convert light energy from the sun into electrical energy. A large number of silicon-based solar cells are used in ground-based photovoltaic systems, which can be divided into monocrystalline silicon, polycrystalline silicon, and amorphous silicon solar cells. In terms of energy conversion efficiency and service life, monocrystalline silicon and polycrystalline silicon cells are superior to amorphous silicon cells.

Applied to photovoltaic cell coatings:

Ultrasonic spraying technology can successfully deposit anti reflective layers, TCO coatings, buffer layer coatings, PEDOT, and active layers in the manufacturing of thin films and perovskite solar cells. OPV, CIG, CdTE, CzT, Perovskite and DSC are some solutions and suspensions that can be deposited in the preparation of thin film solar cells using ultrasonic wet spraying technology. The ultrasonic spraying system reduces the cost of manufacturing thin-film solar cells while still providing high cell efficiency.