The invention discloses a
silicon solar cell and a manufacturing method of the
silicon solar cell. The manufacturing method of the
silicon solar cell includes the following steps of firstly providing a metallurgical grade silicon
wafer substrate and cleaning the metallurgical grade silicon
wafer substrate, secondly
etching the metallurgical grade silicon
wafer substrate and conducting purification on the metallurgical grade silicon wafer substrate, thirdly conducting morphology modification on the surface of a silicon nanometer array, fourthly conducting morphology modification on the surface of the silicon nanometer array again, and fifthly
coating the silicon nanometer array with conjugated
organic matter. According to the manufacturing method of the
silicon solar cell, the metallurgical grade silicon materials are applied to preparation of the solar
cell, surface morphology treatment and surface purification treatment are conducted on the metallurgical grade silicon materials by fully applying the wet
metal auxiliary chemical
etching technology, and a silicon nanometer structure is formed. Passivating treatment is conducted on organic materials and the silicon nanometer structure,
electrical performance and optical performance of a metallurgical grade
silicon cell are improved, and
charge separation performance and charge
transmission performance are improved. Stability of the
cell is improved through modification to organic-inorganic
hybrid heterojunction, and the charge transmission capacity of the solar
cell is enhanced.