Department of Chemistry, University of Kansas, Lawrence, KS 66045, USA.
Nanoscale. 2012 Dec 21;4(24):7649-54. doi: 10.1039/c2nr32097e. Epub 2012 Oct 8.
The large absorption coefficient of iron pyrite (FeS(2)) nanocrystals coupled with their low-cost and vast-abundance shows great promise as a potential photovoltaic absorber. Here, we demonstrate that bulk heterojunction (BHJ) nanostructures consisting of 80 nm FeS(2) nanocubes (NCs) and 4 nm CdS quantum dot (QD) matrix, lead to a well-defined percolation network, which significantly improved open-circuit voltage (V(oc)) to 0.79 V and power conversion efficiency of 1.1% under AM 1.5 solar illumination. The localized surface plasmon resonances (LSPRs) arising from p-type colloidal FeS(2) NCs exhibit plasmonic photoelectron conversion. Our approach can be applied to a wide range of colloidal nanocrystals exhibiting the LSPRs effect and is compatible with solution processing, thereby offering a general tactic to enhancing the efficiency of all inorganic BHJ solar cells and LSPRs-based NIR photodetectors.
黄铁矿 (FeS(2)) 纳米晶体具有较大的吸收系数，成本低廉，储量丰富，在作为潜在光伏吸收体方面具有很大的应用前景。在此，我们证明了由 80nm 黄铁矿纳米立方体 (NCs) 和 4nm CdS 量子点 (QD) 基质组成的体异质结 (BHJ) 纳米结构形成了一个明确的渗流网络，这显著提高了开路电压 (V(oc)) 至 0.79V，并在 AM1.5 太阳光照射下将功率转换效率提高到 1.1%。源于 p 型胶体 FeS(2) NCs 的局域表面等离激元共振 (LSPRs) 表现出等离子体光电转换。我们的方法可应用于广泛的表现出 LSPRs 效应的胶体纳米晶体，并与溶液处理兼容，从而为提高所有无机 BHJ 太阳能电池和基于 LSPRs 的近红外光探测器的效率提供了一种通用策略。
