Self Aligned Cell: Scaling Up Manufacture of a Cost Effective Cell Architecture for Multicrystalline Silicon Photovoltaics

Gabor, A. ; van Mierlo, F.

关键词: COPPER;    COST;    DAMAGE;    DECOUPLING;    DEPOSITION;    EFFICIENCY;    FABRICATION;    FINGERS;    LAYERS;    MATERIALS;    REFLECTIVITY;    SCALING;    SCREEN PRINTING;    SEEDS;    SILICON;    SILVER;    SOLAR CELLS;    TEXTURE MULTICRYSTALLINE;   

DOI  :  10.2172/1001446
RP-ID  :  NREL/SR-5200-49934
PID  :  OSTI ID: 1001446
Others  :  Other: NAT-9-88012-01
Others  :  TRN: US201104%%95

美国|英语

来源: SciTech Connect

【 摘 要 】

Two areas of technology for fabrication of higher efficiency Si-wafer solar cells were addressed: (1) the formation of structured texturing that is an improvement over the industry-standard isotexture process for multicrystalline wafers. (2) the formation of fine line (<50 micron) metallization seed layers in a self-aligned manner where the fingers can be automatically and perfectly lined up to a selective emitter and where expensive silver screen printing paste can be mostly replaced by plating up the seed layers with silver or copper. The benefits are: a) Lower reflectivity , b) Decoupling the performance of the texture from the saw damage, thus allowing for better advances in sawing and a more robust wet process. 1366 Technologies developed 2 pilot machines for 1) deposition and patterning of low-cost resist layers to enable simultaneous Honeycomb front texturing and groove formation for multicrystalline Si wafers, and 2) fine-line dispensing of materials that are self aligned to the grooves.