The effect of wire diameter on the performance of solar cells based on graphene and silicon quantum wires
作者： Zahra Arefinia , Asghar Asgari
DOI: 10.1109/NUSOD.2017.8009974
关键词: Heterojunction 、 Optoelectronics 、 Direct and indirect band gaps 、 Photonic crystal 、 Quantum dot 、 Silicon 、 Band gap 、 Graphene 、 Absorption (electromagnetic radiation) 、 Materials science
摘要: The effect of silicon quantum wires (SiQWs) diameter heterojunction solar cells based on SiQWs with rectangular cross sections and graphene (SiQWs/G) is investigated using a coupled optical electrical model. It found that SiQWs/G small section area (d2=4 nm2) shows high efficiency. because, the band gap obtained from distance energy state wave function lowest conduction bands highest valence increases as wire decreases. Also, confinement results in direct indirect bulk gap. other hand, large d2 also efficiency due to better light absorption larger surface d.
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