Recently, Yingli announced that it has learned from SEMI's global headquarters in the United States that the three SEMI international standards PV65-0715 "RGB-based crystalline silicon solar battery color test method" led by Yingli, PV66-0715 "solar cell grid raster aspect ratio Test: Laser Scanning Confocal Microscopy "and PV67-0815" Crystalline silicon wafer corrosion rate test method: Weighing "was officially approved. The simultaneous issuance of these three standards set a precedent for China's PV enterprises to participate in the formulation of international standards and achieved a new breakthrough in China's participation in international standard-setting.
It is reported that the three SEMI standards, PV65-0715 standard provides a method based on the RGB test solar cell color, the test standard compared with the current routine manual test, the accuracy of the test, the stability has greatly improved, The color value of the battery surface can be quickly obtained, which provides an effective solution to the color difference problem of the photovoltaic module.
PV66-0715 proposes a method for measuring the aspect ratio of a grid line of a battery electrode by using a laser scanning confocal microscope. The method does not touch the test sample during the test, does not damage the test sample, and can test the three-dimensional Topography data can be more intuitive and more stereoscopic observation solar cell grid electrode grid printing effect, the development of this standard will optimize the raster line aspect ratio, improve solar cell conversion efficiency is of great significance.
The PV67-0815 standard proposes a method for measuring the silicon wafer etch rate by the weighing method. The corrosion depth of the silicon wafer in the photovoltaic industry determines the electrical parameters of the photovoltaic battery. The development of this standard will be of great significance for improving the battery conversion efficiency.
The three SEMI standards released by the Yingli organization's technical team in October 2013 and June 2014, respectively, to apply and successfully set the project, the standard development process has undergone many global repeated solicit opinions. Among them, "RGB-based crystalline silicon solar cell color test method" has held six working group meetings, three submitted to SEMI China Standard Committee review, three global network solicitation opinions, which lasted nearly 2 years and finally in July 2015 to Global release.
Dr. Song Dengyuan, chief technology officer of Yingli Group and core member of SEMI China PV Standard Technical Committee, said: "With the rapid development of the global PV market and the implementation of China's photovoltaic leader program, the efficiency and quality of crystalline silicon solar cells have been raised Requirements.The three SEMI standards led by Yingli in the field of photovoltaic cells provide a guarantee for the improvement of solar cell quality and conversion efficiency from the test method of solar cell key preparation process and also indicate that China's photovoltaic industry is gradually changing from the International Photovoltaic Standards Developers follow the shift towards standard-setting leaders. "
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