基于表面等离子体共振效应的荧光太阳集光器制备及其性能  

Preparation and Performance of Luminescent Solar Concentrator Based on Surface Plasmon Resonance Effect

作　　者：曹修东 张会红[1] 田野 张毅 顾港伟 张晓伟 CAO Xiu-dong;ZHANG Hui-hong;TIAN Ye;ZHANG Yi;GU Gang-wei;ZHANG Xiao-wei(Faculty of Electrical Engineering and Computer Science,Ningbo University,Ningbo 315211,China;National Laboratory of Solid State Microstructures,Nanjing University,Nanjing 210093,China)

机构地区：[1]宁波大学信息科学与工程学院,浙江宁波315211 [2]南京大学固体微结构国家重点实验室,江苏南京210093

出　　处：《发光学报》2022年第3期396-403,共8页Chinese Journal of Luminescence

基　　金：国家自然科学基金(61974078,61704094);浙江省自然科学基金(LY21F040002);浙江省省属高校基本科研业务费专项资金(SJLY2021012)资助项目。

摘　　要：金属纳米颗粒的表面等离子体共振效应能够对特定波长入射光的吸收或者散射增强,正因为其独特的光学性质,金属纳米颗粒被尝试应用于荧光太阳集光器。本文利用全无机钙钛矿CsPbBr_(3)量子点、Au纳米颗粒和硫醇-烯聚合物制备荧光太阳集光器。研究发现,掺杂适量Au纳米颗粒可以通过表面等离子体共振效应提高全无机钙钛矿CsPbBr_(3)量子点荧光太阳集光器的外量子效率。当Au纳米颗粒的掺杂浓度为2.0×10^(-6)时,荧光太阳集光器的外量子效率为12.3%,相比未掺杂Au纳米颗粒的荧光太阳集光器的外量子效率提升了78.2%。进一步提高Au纳米颗粒的掺杂浓度,荧光太阳集光器的外量子效率下降。荧光发射谱和荧光寿命谱测试结果显示,当Au纳米颗粒的掺杂浓度超过2.0×10^(-6)时,过高的Au纳米颗粒掺杂浓度导致CsPbBr_(3)量子点与Au纳米颗粒之间发生非辐射能量转移,荧光太阳集光器荧光量子产率(η_(PL,LSC))下降导致了外量子效率下降。The surface plasmon resonance effect of metal nanoparticles can enhance the absorption and scattering of incident light at a certain wavelength.Because of this unique optical property,the metal nanoparticles are developed for the applications of luminescent solar concentrators.In this paper,the Au nanoparticles with different concentrations are introduced to the luminescent solar concentrators based on the all-inorganic perovskite CsPbBr_(3) quantum dots and the thiol-ene polymer.The results show that the Au nanoparticles with suitable concentration can improve the external quantum efficiency of the luminescent solar concentrators by the surface plasmon resonance effect.When the doping concentration of Au nanoparticles is 2.0×10^(-6),the external quantum efficiency of the luminescent solar concentrator is 12.3%,which is enhanced by 78.2%compared with that of Au-free luminescent solar concentrator.With the further increase of Au nanoparticle doping concentration above 2.0×10^(-6),the external quantum efficiency of the luminescent solar concentrators decreases.According to the photoluminescence emission spectra and the time-resolved photoluminescence emission curves,excessive Au nanoparticle doping concentration leads to the non-radiative energy transfer process between the CsPbBr_(3) quantum dots and Au nanoparticles.The decreasing fluorescence quantum yield(η_(PL,LSC))gives rises to decreasing external quantum efficiency of the luminescent solar concentrator.

关 键 词：钙钛矿量子点 Au纳米颗粒 表面等离子体共振效应 外量子效率 非辐射能量转移 

分 类 号：O482.31[理学—固体物理] TK513[理学—物理]