Modulation of optical properties for lighting applications based on CsPbBr3−xIx quantum dot doped glasses

Abstract

All inorganic halide perovskite quantum dots (PQDs) exhibit excellent optical properties and have been intensively exploited for diverse applications in the field of optoelectronics. However, their inherent frangibility remains an enormous challenge for both practical applications and scientific research. The recently emerged oxide glasses doped with such PQDs exhibit high stability against degradation, which is promising for practical applications. Here, borosilicate glasses doped with CsPbBr3−xIx PQDs were prepared by the traditional melt-quenching and subsequent annealing process. By introducing alkaline metal oxides as the glass network modifier to adjust glass network structure, the optical properties of the precipitated PQDs are significantly enhanced. The photoluminescence (PL) intensity and photoluminescence quantum yield (PLQY) can be enhanced by up to 200 % and 29 % for the sample fabricated under optimal conditions, respectively. By leveraging the strong PL of the developed PQD-doped glasses, we demonstrate the fabrication of phosphor-converted light emitting devices for white light illumination and plant illumination based on samples with PL peak wavelengths at approximately 570 nm and 650 nm, respectively.