Fig. 1. Three typical configurations of backlight systems in LCDs with placement of quantum dot materials.（a）On chip；（b）On edge；（c）On surface^［35］.

Fig. 2. Light-emitting devices made with（a）CsPbBr₃@glass slice，（b）CsPb（BrI）₃@glass slice，and（c）CsPbBr₃@glass+CsPb（BrI）₃@glass slices in scheme 1；（d）Luminous efficiency and external quantum efficiency of CsPbBr₃@glass slice and CsPb（BrI）₃@glass slice；（e）CsPbBr₃@glass+ CsPb（BrI）₃@glass slices in schemes 1 and 2 and（f）their chromaticity coordinates as a function of forward bias current^［29］.

Fig. 3. （a）Color reproduction range of LED mounted with the PIG with the BRG arrangement（inset figure）with and without application of the color filter function. The insets are EL+PL spectrum and actual photograph；（b）Transmittance spectra of red，green，and blue（R，G，and B）color filters ^［42］.

Fig. 4. Color gamuts of sRGB，NTSC 1953，DCI-P3 and Rec.2020 in the CIE diagram.

Fig. 5. （a）PLQY value versus emitting wavelength for the CsPbX₃@glass samples prepared with two different kinds of glass compositions. For comparison，the PLQY values of colloidal CsPb（Br/I）₃ PeQDs with different green emission wavelengths are also provided. All the measurements are under the same excitation wavelength of 450 nm；（b）Decay lifetime of exciton recombination versus emitting wavelength for the CsPbX₃@glass samples；Two-dimensional femtosecond pumping transient absorption spectra of（c）CsPbBr₃@glass and（d）CsPbBr_2.52I_0.48@glass samples. The blue and red regions correspond to ground state bleaching and excited emission respectively，indicating that additional defective state trapping exciton radiation is produced when mixed halogen quantum dots are precipitated^［35］.

Fig. 6. Thermal cycling test results of perovskite quantum dot glass samples.（a）～（c）Samples from Liu et al^［29］；（d）Samples from Guo et al^［48］；（e）Samples from Im et al^［42］；（f）Samples from Chen et al^［35］.

Fig. 7. （a）Dependence of PLQYs for the green film（CsPbBr₃@glass@PDMS）on the weight ratio of［CsPbBr₃@glass］/PDMS，insets are the photographs of the luminescent films；（b）Dependence of PLQYs for the CsPbBr₃@glass@PDMS and CsPbBr_1.5I_1.5@glass@PDMS films on the wavelength of incident excitation light；（c）Photostability test under UV light（6 W）irradiation for 7 days；（d）Humidity-resistance test under the strengthening condition by directly immersing CsPbX₃@glass@PDMS films in water maintained at 90 ℃ for 24 h，as a comparison，the data for colloidal CsPbBr₃ PeQDs in PDMS（CsPbBr₃@PDMS）are also provided in（c，d）；Comparison between a display prototype integrated with a perovskite quantum dot glass optical film（e）and a commercial display（f）^［27］；Comparisons between a display prototype integrated with a perovskite quantum dot optical film（g）and Apple MacBook Air（h）^［55］.

Fig. 8. （a）EL spectra of white light backlight unit fabricated by combining blue LGP with CsPbBr₃@glass@PDMS film and KSF∶Mn⁴⁺ film，insets are the backlight unit under daylight and 3.3 V applied voltage；（b）Schematic diagram of the LCD device structure using the as-prepared backlight unit；Display performance of LCD screen with commercial backlight unit（（c），（e））and CsPbBr₃@glass@PDMS film backlight unit（（d），（f））；（g）Color gamut of the commercial screen（green line），the CsPbBr₃@glass@PDMS film screen with and without color filters（dash line and black line，respectively），NSTC 1953 standard（blue line）and Rec. 2020 standard（red line）in the CIE diagram^［60］.