Affiliation:
1. Qingdao University of Science and Technology
2. Nanjing Normal University
Abstract
Mn2+ doped lead-free double perovskites are emerging afterglow materials that can avoid the usage of rare earth ions. However, the regulation of the afterglow time is still a challenge. In this work, the Mn doped Cs2Na0.2Ag0.8InCl6 crystals with afterglow emission at about 600 nm are synthesized by a solvothermal method. Then, the Mn2+ doped double perovskite crystals are crushed into different sizes. As the size decreases from 1.7 mm to 0.075 mm, the afterglow time decreases from 2070 s to 196 s. Steady-state photoluminescence (PL) spectra, time resolved PL, thermoluminescence (TL) reveal the afterglow time monotonously decreases due to the enhanced nonradiative surface trapping. The modulation on afterglow time will greatly promote their applications in various fields, such as bioimaging, sensing, encryption, and anti-counterfeiting. As a proof of concept, dynamic display of information is realized based on different afterglow times.
Funder
Qingdao Municipal Science and Technology Bureau, China
National Natural Science Foundation of China
Taishan Scholar Project of Shandong Province
Natural Science Foundation of Shandong Province
Subject
Atomic and Molecular Physics, and Optics
Cited by
1 articles.
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