Lal N N, Soares B F, Sinha J K, Huang F, Mahajan S, Bartlett P N, Greenham N C, Baumberg J J
Cavendish Laboratory, University of Cambridge, Cambridge, United Kingdom.
Opt Express. 2011 Jun 6;19(12):11256-63. doi: 10.1364/OE.19.011256.
Localized plasmon resonances of spherical nanovoid arrays strongly enhance solar cell performance by a factor of 3.5 in external quantum efficiency at plasmonic resonances, and a four-fold enhancement in overall power conversion efficiency. Large area substrates of silver nanovoids are electrochemically templated through self-assembled colloidal spheres and organic solar cells fabricated on top. Our design represents a new class of plasmonic photovoltaic enhancement: that of localized plasmon-enhanced absorption within nanovoid structures. Angularly-resolved spectra demonstrate strong localized Mie plasmon modes within the nanovoids. Theoretical modelling shows varied spatial dependence of light intensity within the void region suggesting a first possible route towards Third Generation plasmonic photovoltaics.
球形纳米空洞阵列的局域表面等离子体共振在等离子体共振时将太阳能电池的外量子效率显著提高了3.5倍，并使整体功率转换效率提高了四倍。通过自组装胶体球对大面积银纳米空洞基板进行电化学模板化，并在其上制备有机太阳能电池。我们的设计代表了一种新型的等离子体光伏增强：纳米空洞结构内的局域表面等离子体增强吸收。角分辨光谱表明纳米空洞内存在强烈的局域米氏等离子体模式。理论建模显示了空洞区域内光强的不同空间依赖性，这为第三代等离子体光伏提供了第一条可能的途径。
