V5+-doped CsPbBr3 quantum dots tellurite glass for shortwave shielding

Abstract

Recently, CsPbBr3 quantum dots (QDs) glass has attracted much attention due to its excellent optical properties, high photoluminescence quantum yield (PLQY), and narrowband emission properties, but there is little research on its broadband absorption property. In this work, the CsPbBr3 QDs tellurite glass material is prepared through the traditional melting quenching method. V5+ is added to the QDs glass to form CsPbBr3 QDs with emission band ranging from 479 to 490 nm. Based on the broadband self-absorption phenomenon, the blue emission intensity of CsPbBr3 QDs glass is decreased with the increase of V5+ doping concentration, which confirms that the glass sample possesses a shortwave shielding effect. And the practical test results also indicate that the present material keeps high transmittance in the red wavelength band and exhibits a superior shielding effect in the blue wavelength band. Hence, it can be unambiguously demonstrated that V5+-doped QDs glass as shortwave shielding materials has application prospects in the filter field.