Jo Hanggochnuri, Sohn Ahrum, Shin Kyung-Sik, Kumar Brijesh, Kim Jae Hyun, Kim Dong-Wook, Kim Sang-Woo
School of Advanced Materials Science and Engineering, Sungkyunkwan University (SKKU) , Suwon 440-746, Republic of Korea.
ACS Appl Mater Interfaces. 2014 Jan 22;6(2):1030-5. doi: 10.1021/am4045585. Epub 2014 Jan 5.
An efficient approach to producing hexagonally self-assembled and well-dispersed gold (Au) nanoparticles (NPs) in the pores of porous anodic aluminum oxide (AAO) is reported. This approach is particularly useful for tuning the surface plasmon resonance frequency of Au NPs by varying the effective dielectric constant of AAO. A strongly enhanced Raman spectrum of dye molecule rhodamine 6G using these well-dispersed Au NPs revealed that such a self-assembled Au NP array can induce a strong plasmonic field. Furthermore, we demonstrated a new architecture of plasmon excitation in a bulk heterojunction (BHJ) inverted organic solar cell (IOSC) using the Au NP array with AAO. The optical response of an active layer poly(3-hexylthiophene):(6,6)-phenyl-C61-butyric acid methyl ester was enhanced by this strong plasmonic field associated a well-dispersed Au NP array. A comparative study of AAO with and without Au NPs confirmed plasmonic improvement of the BHJ IOSC. Simulation results showed that Au NPs concentrate the incoming light into a strongly localized field and enhance light absorption in a wide wavelength range.
报道了一种在多孔阳极氧化铝（AAO）孔中制备六方自组装且分散良好的金（Au）纳米颗粒（NPs）的有效方法。该方法对于通过改变AAO的有效介电常数来调节Au NPs的表面等离子体共振频率特别有用。使用这些分散良好的Au NPs对染料分子罗丹明6G的拉曼光谱进行了强烈增强，结果表明这种自组装的Au NP阵列可以诱导出强等离子体场。此外，我们展示了一种使用带有AAO的Au NP阵列在体异质结（BHJ）倒置有机太阳能电池（IOSC）中进行等离子体激发的新架构。与分散良好的Au NP阵列相关的这种强等离子体场增强了活性层聚（3-己基噻吩）：（6,6）-苯基-C61-丁酸甲酯的光学响应。对有无Au NPs的AAO进行的对比研究证实了BHJ IOSC的等离子体性能得到了改善。模拟结果表明，Au NPs将入射光集中到一个强局部场中，并在宽波长范围内增强光吸收。
