材料科学
吸收(声学)
纳米化学
光电子学
纳米线
光伏系统
吸收效率
兴奋剂
纳米技术
作者
Jinnan Zhang,Lingmei Ai,Xin Yan,Yao Wu,Wei Wei,Mingqian Zhang,Xia Zhang
标识
DOI:10.1186/s11671-018-2727-7
摘要
The photovoltaic performance of axial and radial pin junction GaAs nanocone array solar cells is investigated. Compared with the cylinder nanowire arrays, the nanocone arrays not only improve the whole optical absorption but more importantly enhance the effective absorption (absorption in the depletion region). The enhanced effective absorption is attributed to the downward shift and extension of the absorption region induced by the shrinking top, which dramatically suppresses the absorption loss in the high-doped top region and enhances the absorption in the depletion region. The highest conversion efficiencies for axial and radial GaAs nanocone solar cells are 20.1% and 17.4%, obtained at a slope angle of 5° and 6°, respectively, both of which are much higher than their cylinder nanowire counterparts. The nanocone structures are promising candidates for high-efficiency solar cells.
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