Exploring plasmons weakly coupling to perovskite excitons with tunable emission by energy transfer  

作　　者：严国栋 张振华 郭衡 陈金平 蒋青松 崔乾楠 石增良 徐春祥 Guo-Dong Yan;Zhen-Hua Zhang;Heng Guo;Jin-Ping Chen;Qing-Song Jiang;Qian-Nan Cui;Zeng-Liang Shi;Chun-Xiang Xu(State Key Laboratory of Bioelectronics,School of Physics,Southeast University,Nanjing 210096,China;Faculty of Electronic Information Engineering,Huaiyin Institute of Technology,Huaian 223001,China)

机构地区：[1]State Key Laboratory of Bioelectronics,School of Physics,Southeast University,Nanjing 210096,China [2]Faculty of Electronic Information Engineering,Huaiyin Institute of Technology,Huaian 223001,China

出　　处：《Chinese Physics B》2023年第6期537-544,共8页中国物理B（英文版）

基　　金：Project supported by the National Key R&D Program of China (Grant Nos. 2017YFA0700503 and 2018YFA0209101);the National Natural Science Foundation of China (Grant Nos. 61821002, 11734005, 62075041, and 61704024)。

摘　　要：Localized surface plasmon resonance(LSPR) has caused extensive concern and achieved widespread applications in optoelectronics. However, the weak coupling of plasmons and excitons in a nanometal/semiconductor system remains to be investigated via energy transfer. Herein, bandgap tunable perovskite films were synthesized to adjust the emission peaks,for further coupling with stable localized surface plasmons from gold nanoparticles. The degree of mismatch, using steadystate and transient photoluminescence(PL), was investigated systematically in two different cases of gold nanoparticles that were in direct contacting and insulated. The results demonstrated the process of tuning emission coupled to LSPR via wavelength-dependent photoluminescence intensity in the samples with an insulating spacer. In the direct contact case,the decreased radiative decay rate involves rapid plasmon resonance energy transfer to the perovskite semiconductor and non-radiative energy transfer to metal nanoparticles in the near-field range.

关 键 词：PLASMONS photoluminescence tunable emission PEROVSKITE 

分 类 号：O469[理学—凝聚态物理] O53[理学—电子物理学]