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|1. (WO2018157493) P-TYPE PERC DOUBLE-SIDED SOLAR CELL AND PREPARATION METHOD THEREFOR, AND ASSEMBLY AND SYSTEM THEREOF|
|Applicants:||GUANGDONG AIKO SOLAR ENERGY TECHNOLOGY CO., LTD
ZHEJIANG AIKO SOLAR ENERGY TECHNOLOGY CO., LTD
|Title:||P-TYPE PERC DOUBLE-SIDED SOLAR CELL AND PREPARATION METHOD THEREFOR, AND ASSEMBLY AND SYSTEM THEREOF|
A P-type PERC double-sided solar cell and a preparation method therefor, and an assembly and system thereof. The cell comprises back silver main gates (1), aluminum gate lines (2), a back silicon nitride film (3), a back aluminum oxide film (4), P-type silicon (5), an N-type emitter (6), a front silicon nitride film (7), and a front silver electrode (8) that are stacked in sequence from bottom to top. The back silicon nitride film and the back aluminum oxide film are subjected to laser grooving to form 30-500 laser grooving areas arranged in parallel. 1-50 sets of laser grooving units are provided in each laser grooving area. The aluminum gate lines are connected to the P-type silicon by means of the laser grooving areas. The aluminum gate lines are perpendicularly connected to the back silver main gates. The cell can absorb sunlight from two sides, enlarges the application range of the solar cell, and improves the photoelectric conversion efficiency.