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
Abstract 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 steady-state 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.
Fund: Project supported by the National Key R&D Program of China (Grant Nos. 2017YFA0700503 and 2018YFA0209101) and the National Natural Science Foundation of China (Grant Nos. 61821002, 11734005, 62075041, and 61704024).
Guo-Dong Yan(严国栋), Zhen-Hua Zhang(张振华), Heng Guo(郭衡), Jin-Ping Chen(陈金平),Qing-Song Jiang(蒋青松), Qian-Nan Cui(崔乾楠), Zeng-Liang Shi(石增良), and Chun-Xiang Xu(徐春祥) Exploring plasmons weakly coupling to perovskite excitons with tunable emission by energy transfer 2023 Chin. Phys. B 32 067302
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