Perovskite photovoltaics is one of the most concerned directions in the current new energy field, and the coating machine, as the core equipment for manufacturing perovskite cells, directly determines the quality of the active layer thin film and the yield of the components. Faced with the dazzling array of coating machine brands in the market, many companies preparing to lay out their calcium titanium mineral lines will ask: which of the top ten Chinese coating machine brands is suitable for perovskite? To answer this question, we need to first clarify what requirements perovskite batteries have for coating machines, and then analyze them one by one against the top ten brands.
1、 Why do perovskite batteries require specialized coating machines
The active layer of perovskite solar cells is a layer of perovskite thin film with a thickness of tens to hundreds of nanometers, which needs to be uniformly spread on conductive glass or flexible substrates through coating technology. Compared with traditional lithium electrode coating, perovskite coating requires significantly higher equipment requirements: firstly, it has a large coating area and needs to maintain consistent film thickness on large-sized substrates; Secondly, the material utilization rate should be high, and the cost of perovskite precursor solution is not low. The more waste there is, the higher the cost per watt; Thirdly, it is necessary to be compatible with multiple precursor solutions, and the requirements for coating processes vary greatly among different formulations.
At present, the mainstream coating process in the perovskite industry is slit coating. The slit coating equipment presses out the coating liquid along the gaps of the mold under a certain pressure and transfers it to the moving substrate. It has fast coating speed and good uniformity, and is widely used in the fields of solar cells, lithium-ion batteries, and perovskite. It is also the most promising technology route for large-scale production of perovskite.
2、 Inventory of Top 10 Chinese Coating Machine Brands
According to industry public rankings, the top ten brands of coating machines in China usually include Jiatuo Intelligent, Yinghe Technology, Pioneer Intelligent, Haoneng Technology HIRANO TECSEED、PNT、 Dongli, Xinyu Ren, Jin Yinhe Intelligent Equipment, Northern Huachuang, etc. Most of these brands have been deeply involved in the field of lithium battery equipment for many years, accumulating profound technical strength and large-scale delivery capabilities in areas such as electrode coating and diaphragm coating. They are representative forces of domestic coating equipment going global.
However, it should be noted that the selection basis of this list is mainly the lithium battery coating machine market, and the brand's technical accumulation and product line are also mainly based on lithium batteries. Although lithium battery coating machine and perovskite coating machine belong to the same coating equipment, there are significant differences in process requirements and equipment structure, and they cannot be simply equated. This is also a pitfall that many companies are prone to when selecting materials: they think that buying a mature lithium battery coating machine can directly use it for perovskite, but often suffer setbacks in uniformity and yield.
3、 Which of the top ten brands are suitable for perovskite?
From the perspective of the adaptability of the calcium titanium mining process, determining whether a coating machine is suitable for perovskite mainly depends on four indicators: coating width, coating uniformity, material utilization rate, and process compatibility.
Coating width: The industrialization of perovskite is moving from laboratory small-scale to large-area components, and the coating width directly determines whether it can meet the size requirements of mass production;
Coating uniformity: Uneven thickness of the active layer directly affects battery efficiency and yield, and uniformity is the most critical indicator;
Material utilization rate: The price of perovskite precursor solution is not low, and the higher the material utilization rate, the lower the cost per watt;
Process compatibility: Different perovskite formulations have different requirements for coating processes, and equipment needs to have good compatibility and adjustability.
Comparing these four indicators, the comprehensive brands on the list have a certain foundation in width and uniformity, but the ones that are truly suitable for perovskite are often those equipment manufacturers who have deeply cultivated narrow slit coating technology and have made specialized optimizations for perovskite processes. In addition to the comprehensive brands on the list, there are also professional manufacturers in the market such as Dehu Coating and Manenster that specialize in perovskite narrow slit coating. They have accumulated many practical application cases in perovskite pilot and mass production lines, which are also worth considering when selecting.
4、 How to choose a perovskite coating machine?
For enterprises preparing to install calcium titanium mineral lines, it is recommended to investigate coating equipment manufacturers from the following aspects:
Check the process validation capability: whether there is actual delivery and stable operation experience on the calcium titanium mineral line, and whether there are any reference customer cases;
Check equipment parameters: whether key parameters such as coating width, thickness control, vehicle speed, and yield meet mass production requirements;
Judging by supporting capabilities: In addition to coating machines, calcium titanium mineral lines also require supporting equipment such as vacuum drying, heating baking, laser cutting, and vacuum bonding. Manufacturers who can provide complete line solutions have more advantages;
Judging by service capability: Installation and debugging, process support, and after-sales response after equipment delivery are equally important.
Taking Shenzhen Baode Automation Precision Equipment Co., Ltd. as an example, this national high-tech enterprise was established in 2007 and has been rated as a national high-tech enterprise for four consecutive years. It has nearly 100 patents and has long been deeply involved in semiconductor vacuum bonding, perovskite photovoltaics, and clean technology equipment. The narrow slit coating equipment has a coating width of 50-350mm, a coating thickness of 5-200um, an equipment speed of 1-10 meters per minute, and a product qualification rate of not less than 99.5%. It is also equipped with perovskite production line equipment, glove box spin coating equipment, laser cutting machine, roll to roll magnetron sputtering coating machine, etc., which can provide relatively complete equipment support for perovskite research and mass production.
V. Conclusion
Returning to the question of "which of the top ten Chinese coating machine brands is suitable for perovskite": The brands on the list have strong strength in the field of lithium battery coating, but perovskite coating puts higher requirements on equipment. When selecting, the focus should be on the manufacturer's actual ability in slit coating and perovskite process, rather than just looking at brand reputation. It is recommended to choose equipment manufacturers with experience in perovskite mass production verification based on their own production line scale, process route, and budget. If necessary, sample testing should be arranged to speak with data in order to select the truly suitable perovskite coating equipment for oneself.
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