High efficiency low cost crystalline-si thin film solar module

A double-sided heterojunction solar cell, comprising:

• a frontside glass cover;
• a semiconductor multilayer structure situated below the frontside glass cover, comprising:
• a frontside electrode grid,
• a first layer of heavily doped amorphous Si (a-Si) situated below the frontside electrode,
• a layer of lightly doped crystalline-Si (c-Si) situated below the first layer of heavily doped a-Si, and
• a layer of heavily doped c-Si situated below the lightly doped c-Si layer;
• a second layer of heavily doped a-Si situated below the multilayer structure;
• a backside electrode situated below the second layer of heavily doped a-Si;
• and
• a backside cover situated below the backside electrode.

A double-sided heterojunction solar cell module, comprising:

• a frontside glass cover;
• a backside cover situated below the frontside glass cover;
• and
• a number of solar cells situated between the frontside glass cover and the backside glass cover, wherein each solar cell comprises:
• a semiconductor multilayer structure situated below the frontside glass cover, comprising:
• a frontside electrode grid,
• a first layer of heavily doped amorphous Si (a-Si) situated below the frontside electrode,
• a layer of lightly doped crystalline-Si (c-Si) situated below the first layer of heavily doped a-Si, and
• a layer of heavily doped c-Si situated below the lightly doped c-Si layer;
• a second layer of heavily doped a-Si situated below the multilayer structure;
• and
• a backside electrode situated below the second layer of heavily doped a-Si.