Luminescence and nonlinear optical properties of stable MAPbBr3 quantum dots in SiO2 mesopores

被引：1

作者：

Wu, Yanwen ^{[1
]}

Xiang, Guangbiao ^{[1
]}

Zhang, Man ^{[1
]}

Shan, Baojie ^{[1
]}

Miao, Xiaona ^{[1
]}

Leng, Jiancai ^{[2
]}

Wei, Dongmei ^{[1
]}

Chen, Cheng ^{[1
]}

Ma, Hong ^{[1
]}

机构：

[1] Shandong Normal Univ, Collaborat Innovat Ctr Light Manipulat & Applicat, Sch Phys & Elect, Shandong Prov Key Lab Opt & Photon Device, Jinan 250014, Peoples R China

[2] Shandong Acad Sci, Qilu Univ Technol, Sch Elect & Informat Engn, Dept Phys, Jinan 250353, Peoples R China

来源：

JOURNAL OF NONLINEAR OPTICAL PHYSICS & MATERIALS | 2023年 / 32卷 / 03期

基金：

中国国家自然科学基金;

关键词：

MAPbBr(3) perovskite; mesopores; ultrafast carrier dynamics; nonlinear absorption; PEROVSKITES; ABSORPTION; EMISSION; BR; CL;

D O I：

10.1142/S021886352350025X

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

MAPbBr(3) quantum dots in SiO2 mesopores (similar to 4.4 nm) were prepared by the spin-coating method, and their luminescence and nonlinear optical properties were studied by time-resolved photoluminescence (TRPL) and Z-scan techniques. The results showed that the absorption and photoluminescence peaks are at 464 nm and 476 nm, respectively. The TRPL spectroscopy showed two relaxation processes, a short lifetime (1.04 ns) and a long lifetime (4.49 ns), attributed to the trap-capture recombination and the electron-hole radiative recombination, respectively. Two-photon absorption (TPA) coefficient was 529 cm/GW at 800 nm. The nonlinear signal changed from TPA to saturable absorption with increase in light intensity.

引用

页数：13

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