Study of the spin on dopant technique as alternative for the fabrication of c-Si solar cells

摘要

In this work is reported a simple fabrication process of crystalline silicon (c-Si) solar cells using a n-type liquid source (Spin-On-Dopant, SOD) for the solar cell emitter formation. The solar cells were fabricated on p-type (5-15 Ωcm), (100), low cost Czochralski (Cz) silicon wafers and were textured using a solution based on potassium hydroxide (KOH). The efficiency reached in this work was of 14 % in a solar cell of 100 mm2. Despite the efficiency reported in this work is still lower than that achieved in high efficiency c-Si solar cells, it is important to stress that the simplicity of the fabrication process, the use of low cost CZ wafers and the use of SOD instead of doping gases (PH3 or POCL3), made this work interesting for a low cost and industrially compatible fabrication process of solar cells.