Calcium titanium ore battery research started late, but its conversion efficiency is much faster than crystalline silicon batteries. Single junction chalcogenide battery in just over ten years will be the conversion efficiency from 3.8% to 26.1%, crystalline silicon / chalcogenide stacked battery conversion efficiency is rapidly rising to 33.9%, while crystalline silicon solar cells to reach a conversion efficiency of 26.1% with nearly 40 years.Email:amy@etelux.com
Calcium titanite battery belongs to the third generation of new solar cells, product structure principle and silicon-based batteries differ greatly, need a new process and production line equipment, in the research and development and production, coating, etching, encapsulation is the three core processes:
Coating: The preparation process of chalcogenide is similar to that of other thin film batteries, which requires the preparation of high purity, less defective, high coverage, dense chalcogenide layer film and transport film by solution coating method, solution spraying method, vapor deposition method, etc., in order to improve the electrical contact between the different layer structures, to reduce the loss in the transport process, and to achieve a high conversion efficiency of the battery.
Etching: The circuit structure in the chalcogenide cell can be constructed by multi-pass laser etching to connect multiple chalcogenide cells in series to form an assembly.
Encapsulation: the current encapsulation technology used similar to crystalline silicon technology, mainly to replace the original crystalline silicon with EVA film, because EVA is polyvinyl acetate, its polymerization can not be 100% complete, there must be acetic acid residues, and acetic acid will react with amines into amino acids, so from the principle of EVA can not be used in the calcite titanium, calcite titanium is mainly used in POE materials.
No matter which kind of solar energy, are inseparable from the surface coating: the current mainstream technology methods, can not be a good solution to the problem of uniformity of the coating layer. Spray method of coating process, spray center coating liquid enrichment more, resulting in splotch; surface etching method due to embossed glass surface composition is difficult to uniform, resulting in inconsistent speed of etching reaction caused by uneven film thickness; even if the uniformity of the roller coating method, subject to the constraints of the difference between the thickness of the glass, the jitter of the roller conveyor transmission and a variety of other factors, it is difficult to achieve consistency of high precision. In the case of coating uniformity can not be further improved, the result on the one hand, the color difference of the module affects the appearance, on the other hand, due to the inconsistency of the transmittance of the various regions of the coated glass caused by the hot spot effect, affecting the durability of the module.
To address this issue, in the preparation of solar cells, generally need to use vacuum coating glove box: by the vacuum coating system and vacuum glove box system integration, can be completed in a high vacuum vaporization chamber thin film evaporation, and in the glove box under the atmosphere of high-purity inert gas for the storage of samples, the preparation of samples, as well as the detection of samples after the evaporation. In the glove box nitrogen environment in the spin coating of titania precursor liquid, to avoid contact with water and air, can be directly connected to the collection chamber will be prepared by the titania cell to the evaporation chamber, evaporation of electrodes, the whole experiment can be done under the operation of the environment of no water and no oxygen.
Square chamber automatic door thermal evaporation coating machine embedded in the glove box, supporting the film thickness meter, molecular pump, mechanical pump, four evaporation sources, a reasonable layout of the evaporation source to ensure that each evaporation source to the substrate distance is exactly the same, to improve the quality of the film and uniformity; the whole system is integrated by the vacuum coating system and glove box system, can be completed in the high-vacuum evaporation chamber thin film evaporation, and in the glove box in the high-purity inert gas atmosphere for sample storage, preparation and storage of samples under the atmosphere of high purity inert gas. Under the glove box high-purity inert gas atmosphere for sample storage, preparation and testing of samples after vaporization. It is mainly used for experimental research and application of solar cell chalcogenide, OLED and PLED, and semiconductor preparation.
