当前位置: X-MOL 学术Laser Photonics Rev. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
All-Inorganic Rare-Earth-Based Double Perovskite Nanocrystals with Near-Infrared Emission
Laser & Photonics Reviews ( IF 9.8 ) Pub Date : 2021-08-27 , DOI: 10.1002/lpor.202100218
Ruixiang Wu 1 , Peigeng Han 2, 3 , Daoyuan Zheng 2 , Junfeng Zhang 1 , Songqiu Yang 4 , Yang Zhao 5 , Xiangyang Miao 1 , Keli Han 2, 4
Affiliation  

Lead-free halide perovskite nanocrystals (NCs) with the unique optical properties are of interest for broad applications. There are a few studies on near-infrared (NIR) emission in perovskite NCs. Here, all-inorganic rare-earth-based Cs2NaEr1−xBxCl6 (B: In, Sb, or Bi; x = 0, 0.13, and 0.5) double perovskite (DP) NCs have been successfully sythesized. The Cs2NaErCl6 NCs show good air stability and emit a sharp NIR photoluminescence (PL) at telecommunication wavelength of 1543 nm, originating from 4I13/24I15/2 transition of the Er3+, and its average lifetime is 35.7 µs. Especially for Cs2NaEr0.5Sb0.5Cl6 NCs, NIR PL can be enhanced 23-fold with the lifetime being 119.1 µs. Moreover, femtosecond transient absorption measurements prove that a long-lifetime trap state promotes NIR emitting in the mixed Sb/Er DP NCs.

中文翻译:

具有近红外发射的全无机稀土基双钙钛矿纳米晶体

具有独特光学特性的无铅卤化物钙钛矿纳米晶体 (NCs) 具有广泛的应用前景。有一些关于钙钛矿 NC 中近红外 (NIR) 发射的研究。在这里,全无机稀土基 Cs 2 NaEr 1− x B x Cl 6(B:In、Sb 或 Bi;x = 0、0.13和 0.5)双钙钛矿 (DP) NC 已成功合成。Cs 2 NaErCl 6 NCs 显示出良好的空气稳定性,并在 1543 nm 的电信波长处发出尖锐的 NIR 光致发光 (PL),源自Er 的4 I 13/24 I 15/2跃迁3+,其平均寿命为 35.7 µs。特别是对于 Cs 2 NaEr 0.5 Sb 0.5 Cl 6 NCs,NIR PL 可以提高 23 倍,寿命为 119.1 µs。此外,飞秒瞬态吸收测量证明长寿命陷阱状态促进了混合 Sb/Er DP NC 中的 NIR 发射。
更新日期:2021-08-27
down
wechat
bug