Тип публикации: статья из журнала
Год издания: 2020
Идентификатор DOI: 10.1002/ange.202004562
Ключевые слова: doping, energy transfer, perovskite nanocrystals, photoluminescence, terbium
Аннотация: The incorporation of impurity ions or doping is a promising method for controlling the electronic and optical properties and the structural stability of halide perovskite nanocrystals (NCs). Herein, we establish relationships between rare-earth ions doping and intrinsic emission of lead-free double perovskite Cs2AgInCl6NCs to imparПоказать полностьюt and tune the optical performances in the visible light region. Tb(3+)ions were incorporated into Cs2AgInCl6NCs and occupied In(3+)sites as verified by both crystallographic analyses and first-principles calculations. Trace amounts of Bi doping endowed the characteristic emission (D-5(4)-> F-7(6-3)) of Tb(3+)ions with a new excitation peak at 368 nm rather than the single characteristic excitation at 290 nm of Tb3+. By controlling Tb(3+)ions concentration, the emission colors of Bi-doped Cs2Ag(In1-xTbx)Cl6NCs could be continuously tuned from green to orange, through the efficient energy-transfer channel from self-trapped excitons to Tb(3+)ions. Our study provides the salient features of the material design of lead-free perovskite NCs and to expand their luminescence applications.
Журнал: ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Выпуск журнала: Vol. 59, Is. 28
Номера страниц: 11634-11640
ISSN журнала: 14337851
Место издания: WEINHEIM
Издатель: WILEY-V C H VERLAG GMBH