Enhanced photoabsorption in front-tapered single-nanowire solar cells.
作者： Yaohui Zhan , Xiaofeng Li , Shaolong Wu , Ke Li , Zhenhai Yang
DOI: 10.1364/OL.39.005756
关键词: Nanowire 、 Optoelectronics 、 Dielectric 、 Materials science 、 Solar energy 、 Antenna (radio) 、 Optics 、 Absorption (electromagnetic radiation) 、 Aspect ratio (image) 、 Solar cell 、 Photovoltaic system
摘要: Vertically aligned single-nanowire is verified to be a unique building block realize the high-efficiency solar cell beyond Schockley–Queisser limit. We proposed front-tapered vertically (V-SNSC) and investigated numerically possibility of this configuration improve photoabsorption efficiency compared conventional designs, by using 2.5D full-wave finite-element method. The influences feature sizes aspect ratio, bottom radius, nanowire length on light-trapping properties were explored; detailed field distribution carrier generation rate revealed as well based theory dielectric resonant antenna, in order elucidate underlying physical mechanism. Results showed that, with cylindrical counterparts, absorption capability V-SNSCs could greatly enhanced less material utilized, that such positive effect can further strengthened increasing length. provides promising approach engineer photovoltaic other optoelectronic devices.
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