Ag Nanoparticles Optimized the Optical Properties and Stability of CsPbBrI2 Glass for High Quality Backlight Display

All-inorganic perovskite CsPbX3 (X = Cl, Br,I) nanocrystals(NCs) have generated significant attention in the emerging displayindustry because of their narrow-band emission, high color purity,and facile preparation and processing. By controlling the depositionof Ag nanoparticles in the B-Si-Zn glass matrix, CsPbBrI2 NC glass with significantly enhanced photoluminescence (PL)intensity (about 6.3 times) was successfully prepared, and the photoluminescencequantum yield (PLQY) is increased from 12.4% to 36.9%. More meaningfully,the high-performance glass powders were incorporated into polystyrene(PS) films through solution and blending techniques, and the filmsprepared by the latter had superior color coordinates and environmentalstability, particularly the intense blue light stability. Under conditionsof 60 degrees C, 90% relative humidity (RH), and 10 000 nit bluelight irradiation for 40 d, the PL intensity decline rate of blendedfilm does not exceed 5%. In addition, the light conversion film basedon Ag@CsPbBrI2 glass with CsPbBr3 glass powdersexhibits a wide color gamut of 125.2% of the NTSC 1953 standard, whichshows richer colors than commercial displays on the liquid crystaldisplay (LCD) screen, further opening the space for the developmentof the quantum dot film industry. The opticalproperties of CsPbBrI2 NCs glassesare significantly enhanced by the deposition of silver nanoparticlesfor high-quality backlight displays.