纳米金掺杂二氧化钛复合材料制备及表面等离子体效应  

Preparation of Au@TiO2 Composites and Its Surface Plasmon Effect

作　　者：李杭 南辉[1] 赵晓冲 LI Hang;NAN Hui;ZHAO Xiaochong(College of Mechanical Engineering,Qinghai University,Xining 810016,China;Institute of Materials,Chinese Academy of Engineering Physics,Mianyang 621908,China)

机构地区：[1]青海大学机械工程学院,西宁810016 [2]中国工程物理研究院材料研究所,绵阳621908

出　　处：《硅酸盐通报》2020年第11期3697-3700,3708,共5页Bulletin of the Chinese Ceramic Society

基　　金：四川省科技厅应用基础研究(JY20170318)。

摘　　要：当纳米金颗粒受到可见光和近红外光波照射时,其表面导带的自由电子会以一定的频率局限在纳米金颗粒周围振荡,并在其表面激发较强的等离子体共振效应。本文基于纳米金颗粒的表面等离子体效应,设计了一种纳米金颗粒掺杂二氧化钛电荷传输层的器件结构(FTO/TiO2 dense layer(d-TiO2)/Au@TiO2/amorphous TiO2(a-TiO2)/CH 3 NH3PbI3/spiro/Au)。在该结构中,采用致密的非晶TiO2和介孔层TiO2能够缩短光电子的迁移距离,降低电子-空穴的复合概率,提高器件的光电性能。纳米金掺杂二氧化钛的表面等离子体效应,促进了光电子的吸收,提高了复合材料的吸光系数和光电性能。When Au nanoparticles(AuNPs)are irradiated by visible and near-infrared light,the free electrons in the conduction band oscillate around the AuNPs at a certain frequency,and excite strong plasma resonance effect on the surface.Based on the surface plasmon effect of AuNPs,a device structure of AuNPs doped TiO2 charge transport layer(FTO/TiO2 dense layer(d-TiO2)/Au@TiO2/amorphous TiO2(a-TiO2)/CH 3NH3PbI3/spiro/Au)was designed in this paper.The structure with compact amorphous TiO2 and mesoporous TiO2 shortens the photoelectron migration distance,reduces the electron hole recombination probability,and improves the photoelectric performance of the device.In addition,with the surface plasmon effect of Au@TiO2,the absorption of photoelectron is promoted,and the absorption coefficient and photoelectric properties of the composite are improved.

关 键 词：纳米金 TIO2 钙钛矿 表面等离子体效应 吸光系数 

分 类 号：O484[理学—固体物理]