Progress in thin-film silicon solar cells based on photonic-crystal structures
Progress in thin-film silicon solar cells based on photonic-crystal structures
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DOI：
10.7567/jjap.57.060101
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发表时间：
2018-05
影响因子：
1.5
通讯作者：
K. Ishizaki;M. de Zoysa;Yoshinori Tanaka;Seungwoo Jeon;S. Noda
中科院分区：
文献类型：
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作者：
K. Ishizaki;M. de Zoysa;Yoshinori Tanaka;Seungwoo Jeon;S. Noda
本文综述了利用光子晶体的大面积共振效应增强吸收的光子晶体薄膜硅太阳电池的最新研究进展。首先，一个明确的指导方针，用于增强在宽波长范围（600-1100 nm）的光吸收的介绍，示出的形成，利用高阶模式限制在厚度方向上的多个带边和光子超晶格结构的引入，使显着的吸收增强，超过了传统的随机散射体观察到的。随后，这种增强的实验证据被证明为各种薄膜硅太阳能电池：10500 nm厚的微晶硅电池，几微米厚的微晶硅电池，和1020微米厚的薄单晶硅电池。对于每个电池结构观察到的高短路电流密度和/或效率证实了使用光子晶体的多个带边谐振模式来增强实际太阳能电池中的宽带吸收的有效性。
We review the recent progress in thin-film silicon solar cells with photonic crystals, where absorption enhancement is achieved by using large-area resonant effects in photonic crystals. First, a definitive guideline for enhancing light absorption in a wide wavelength range (600–1100 nm) is introduced, showing that the formation of multiple band edges utilizing higher-order modes confined in the thickness direction and the introduction of photonic superlattice structures enable significant absorption enhancement, exceeding that observed for conventional random scatterers. Subsequently, experimental evidence of this enhancement is demonstrated for a variety of thin-film Si solar cells: ∼500-nm-thick ultrathin microcrystalline silicon cells, few-µm-thick microcrystalline silicon cells, and ∼20-µm-thick thin single-crystalline silicon cells. The high short-circuit current densities and/or efficiencies observed for each cell structure confirm the effectiveness of using multiple band-edge resonant modes of photonic crystals for enhancing broadband absorption in actual solar cells.