Multispectral Plasmon of Anisotropic Core-shell Gold Nanorods@SiO2： Dual-band Absorption Enhancement with Coupling Dye Molecules  

作　　者：CHE Yuping WANG Yang YOU Tingting CHANG Huaiqiu YIN Penggang ZHAI Jin 

机构地区：[1]Key Laboratory of Bio-inspired Smart Interfacial Science and Technology, Ministry of Educate'on, Beijing Key Laboratory of Bio-inspired Energy Materials and Devices, School of Chemistry, Beihang University, Beijing 100191, R R. China [2]Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China [3]National Center for Nanoscience and Technology, Beijing 100190, P. R. China

出　　处：《Chemical Research in Chinese Universities》2018年第5期772-780,共9页高等学校化学研究（英文版）

基　　金：Supported by the National Natural Science Foundation of China（Nos.91333120, 21271016） and the National Basic Research Program of China（No.2012CB720904）.

摘　　要：Direct evidence of effects of surface plasmon resonance（SPR） of gold naaorods（GNRs） on dual-band light absorption enhancement with coupling dye molecules was reported by introducing gold nanorod@SiO2（GNR@SiO2） core-shell nanoparticles into a photoelectric conversion system. GNR with asymmetric shape had unusual anisotropic SPR[transversal surface plasmon resonance（TSPR） and longitudinal surface plasmon resonance（LSPR）]. The excel- lent SPR of GNR made it a promising candidate as enhancing light absorption material to increase power conversion efflciency（PCE）. The PCE was improved nearly 17.2% upon incorporating GNRs, mostly due to the increase in Jsc, while Vo~ and FF were unchanged. The improvement was mostly contributed by the SPR of the GNRs with coupling of N719. And there was also a complementary to N719 in visible light range. Therefore, SPR is an effective tool in improving the photocurrent and consequently enhancement of PCE. The TSPR and LSPR effects of GNRs on light harvesting were reflected in the increased monochromatic incident photon-to-electron conversion efficiency（IPCE）. We also utilized finite-difference tirne-domain（FDTD） to investigate the light coupling of GNRs with TiO2. Compare to the base anode, the IPCE of optimized electrode showed significant improvement and peaks broadening at 500--600 nm and 610--710 nm. We got an increase in overall conversion efficiency from 6.4% to 7.5%.Direct evidence of effects of surface plasmon resonance（SPR） of gold naaorods（GNRs） on dual-band light absorption enhancement with coupling dye molecules was reported by introducing gold nanorod@SiO2（GNR@SiO2） core-shell nanoparticles into a photoelectric conversion system. GNR with asymmetric shape had unusual anisotropic SPR[transversal surface plasmon resonance（TSPR） and longitudinal surface plasmon resonance（LSPR）]. The excel- lent SPR of GNR made it a promising candidate as enhancing light absorption material to increase power conversion efflciency（PCE）. The PCE was improved nearly 17.2% upon incorporating GNRs, mostly due to the increase in Jsc, while Vo~ and FF were unchanged. The improvement was mostly contributed by the SPR of the GNRs with coupling of N719. And there was also a complementary to N719 in visible light range. Therefore, SPR is an effective tool in improving the photocurrent and consequently enhancement of PCE. The TSPR and LSPR effects of GNRs on light harvesting were reflected in the increased monochromatic incident photon-to-electron conversion efficiency（IPCE）. We also utilized finite-difference tirne-domain（FDTD） to investigate the light coupling of GNRs with TiO2. Compare to the base anode, the IPCE of optimized electrode showed significant improvement and peaks broadening at 500--600 nm and 610--710 nm. We got an increase in overall conversion efficiency from 6.4% to 7.5%.

关 键 词：Gold nanorod PLASMON Dual-band absorption Dye-sensitized solar cell（DSSC） N719 

分 类 号：O343.8[理学—固体力学] TN95[理学—力学]