纳米球和核壳纳米球对有机太阳能电池光吸收增强效果的研究

研究了SiO2纳米球、Ag纳米球、SiO2@Ag核壳纳米球、Ag@SiO2核壳纳米球结构分别掺杂到有机太阳能电池的活性层中对器件活性层的光捕获能力增强作用.结果显示:相较于等效的平板结构,掺杂SiO2介质球使活性层光吸收提高了9.95;;Ag金属球则带来11.0;光吸收增强.表明在有机太阳能电池中的活性层中掺杂参数优化的金属球和介质球都能够带来活性层光吸收增强.另外,对活性层中掺杂核壳纳米球结构的研究表明:掺杂SiO2@Ag核壳纳米球的活性层光吸收随着包覆层厚度的增加而增加,当Ag壳厚度为16 nm时,增强效果与掺杂最优的介质球的效果接近,而且两者增强谱也基本相同;掺杂Ag@SiO2核壳纳米球结构中活性层光吸收随着介质包覆层厚度增加而减弱,当包覆层厚度为1 nm时,吸收效果与金属球相当,且吸收谱也是基本相同.通过在有机太阳能电池活性层中掺杂介质球、金属球以及核壳纳米球所带来的活性层光吸收增强效果的研究,为选择掺杂纳米球和核/壳纳米球来提高光捕获能力提供了指导.

Light Absorption Enhancement of Organic Solar Cells Incorporated by Nanospheres and Core/Shell Nanospheres

The paper investigates the light trapping capability enhancement of the active layer incorporating silica nanosphere, silver nanosphere, silica/silver core/shell-nanospheres, and silver /silica core/shell-nanospheres respectively in the patterned organic solar cells.The results show that compared with the structurally identical planar control cell, the integrated light absorption efficiency in the active layer incorporating silica nanospheres is enhanced by 9.95%, the integrated light absorption efficiency of the active layer incorporating silver nanospheres is enhanced by 11.0%.In addition, the study on organic solar cells incorporating the core/shell nanospheres reveals that the efficiency including silica/silver core/shell-nanosphere increases with the increase of silver coating thickness increase.Moreover, as the metal coating thickness is 16 nm, this light absorption enhancement performance approximates the optimal organic solar cell with silica nanospheres and both absorption spectra exhibit nearly close.The efficiency brought by silver/silica core/shell-nanospheres decreases by the decrease of silica coating thickness.Compared with the silver nanospheres, both exhibit the approximate enhancement performance and approximate absorption spectra as coating thickness is fixed 1 nm.Through the study of light absorption enhancement performance of the active layer incorporating dielectric nanospheres, metal nanospheres, and core/shell-nanospheres, this paper provides the guideline for choose nanospheres and core/shell structures incorporated in the active layer into enhancing the light absorption.