Abstract: A solar cell includes an N-type silicon substrate, a P-type doped region, an anti-reflective layer, an n+ back surface field (BSF), aluminum electrodes, aluminum doped regions, and a backside electrode. The N-type silicon substrate has a first surface and a second surface opposite to the first surface. The P-type doped region is formed in the first surface of the N-type silicon substrate. The anti-reflective layer is formed on the P-type doped region. The aluminum electrodes are formed on the P-type doped region, and the aluminum doped regions are formed in the P-type doped region under the aluminum electrodes, wherein the aluminum doped regions are in direct contact with the aluminum electrodes. The n+ BSF is formed in the second surface of the N-type silicon substrate, and the backside electrode is formed on the second surface of the N-type silicon substrate.

Abstract: A fabricating method of nano-powder is provided. First, a mixture having at least a first material and a second material is provided. Then, the mixture is sintered to obtain a single phase alloy body. After that, the single phase alloy body is pre-crumbled to obtain a powder to be ground. Then, a chemical dispersant is added into the powder to further be ground, so as to obtain the nano-powder.