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首页> 外文期刊>Journal of Materials Chemistry, C. materials for optical and electronic devices >Enhanced broadband spectral response and energy conversion efficiency for hetero-junction solar cells with graded-sized Si quantum dots/SiC multilayers
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Enhanced broadband spectral response and energy conversion efficiency for hetero-junction solar cells with graded-sized Si quantum dots/SiC multilayers

机译：具有渐变尺寸的Si量子点/ SiC多层膜的异质结太阳能电池具有增强的宽带光谱响应和能量转换效率

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摘要

In order to circumvent the narrow spectral response of Si quantum dots (Si QDs)-based solar cells, a novel hetero-junction cell structure containing graded-sized QDs-based multilayers was proposed. The size of Si QDs varies from 8 nm to 2 nm which corresponds with the bandgap from 1.2 eV to 2.1 eV. The graded-sized Si QDs-based hetero-junction cell exhibits an enhanced spectral response in a wavelength range from 400 nm to 1200 nm, which is obviously improved compared with that of conventional Si QDs-based cells. Furthermore, by combining the graded-sized Si QDs multilayers with Si nanowire arrays, a Si QDs/Si NWs hetero-junction solar cell was fabricated and the corresponding power conversion efficiency can be as high as 12.80%, due to the significant spectral loss suppression and optical absorption enhancement by forming nano-patterned light trapping structures.
机译：为了规避基于硅量子点（Si QDs）的太阳能电池的窄光谱响应，提出了一种新型的异质结电池结构，该结构包含渐变尺寸的基于QDs的多层。 Si QD的尺寸从8 nm到2 nm不等，对应于1.2 eV至2.1 eV的带隙。渐变尺寸的基于Si QDs的异质结单元在400 nm至1200 nm的波长范围内表现出增强的光谱响应，与常规基于Si QDs的单元相比，明显得到了改善。此外，通过将渐变尺寸的Si QDs多层膜与Si纳米线阵列相结合，制造出了Si QDs / Si NWs异质结太阳能电池，并且由于显着的光谱损失抑制，相应的功率转换效率可以高达12.80％。通过形成纳米图案的光捕获结构来增强光吸收。

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