Polychromatic tunable luminescence of Eu3+ doped CsPbBr3 quantum dot glass ceramic induced by mechanical crystallization

Abstract

Nowadays, inorganic perovskite quantum dots (QDs) glass has become a hot topic in the field of new optical materials. In this work, the Eu3+ doped CsPbBr3 QDs phosphate glass has been successfully prepared. Different from the traditional heat treatment method, the CsPbBr3 QDs were prepared by mechanical crystallization. When the QDs glass was ground at different times, due to the synergistic effect of red emission (Eu3+) and green emission (CsPbBr3 QDs), the prepared QDs glass can produce the red-yellow-green polychromatic luminescence phenomenon. Benefit from the dual-emission centers of CsPbBr3 QDs and Eu3+ which do not interfere with each other, the relative sensitivity of the temperature sensing is up to 2.11% K-1, proving that the prepared Eu3+ doped QDs glass has practical application in the field of temperature sensing. The glass material obtained in this way not only has tunability and favorable sensitivity but also provides an effective way for the preparation of QDs.