First, silicon crystal frontier technology

Since 2006, crystalline silicon modules have accounted for more than 80% of the global photovoltaic application market, accounting for the dominant position in photovoltaic applications. As the mainstream of the current photovoltaic market, crystalline silicon photovoltaic technology has also been seeking breakthroughs in conversion efficiency. From double-glass modules, high-efficiency photovoltaic modules to concentrated photovoltaic, technology has been constantly iterating forward. The following is a detailed introduction to several emerging crystalline silicon photovoltaic technologies.

1. N-type high-efficiency single crystal photovoltaic cell technology

At present, the N-type single-crystal high-efficiency batteries are mainly: PERT battery, PERL battery, HIT battery, IBC battery, HBC battery and so on. According to the different light receiving surface of the battery, it is divided into single-side light receiving type and double-side light receiving type. The efficiency of the 6-inch large-area IBC cell independently developed by a national key laboratory of Trina Solar Photovoltaic Science and Technology in Changzhou has reached 22.9%, becoming the highest conversion efficiency of the 6-inch IBC cell. The conversion efficiency of N-PERT small area cell (4cm2) prepared by Fraunhofer Laboratory in Germany using PassDop technology can reach 23.2% (Voc=699mV, Jsc=41.3mA/cm2, FF=80.5%). Continuous pursuit of efficiency improvement and cost reduction is the eternal theme of the photovoltaic industry, N-type crystalline silicon cells compared with traditional P-type crystalline silicon cells, due to its natural advantages such as non-light attenuation, with greater efficiency improvement space and potential, is the inevitable choice of high-efficiency battery technology route, and with the introduction of new battery technology, the efficiency advantage of N-type crystalline silicon cells will become more and more obvious.

2, concentrating photovoltaic cell technology

Concentrating solar energy is the use of optical elements such as lenses or reflective mirrors to turn large areas of sunlight.