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[ Objective ] Frost temperature thresholds of grape are the basis for frost monitoring , prediction , assessment , and prevention. The study investigated the low-temperature tolerance of the main wine grape ‘ Cabernet Sauvignon ’ at different development stages in the eastern foothills of the Helan Mountain , and further established a system of frost temperature thresholds for wine grapes. The study aimed to provide the basis for frost prediction and prevention of wine grapes in the eastern foothills of the Helan Mountain. [ Methods ] We used a field frost chamber to treat the pompom , bud , new leaves , and new shoots of the main wine grape variety ‘ Cabernet Sauvignon ’ at different developmental stages under low temperature in the eastern foothills of the Helan Mountain during the period of April to May 2022. The supercooling point , relative electrical conductivity ( R EC ), and semi-lethal temperature ( L T50 ) were measured. Field survey on frozen ratio under low temperature treatment was carried out. A regression model based on the correlation between frozen ratio and low temperature was set up to calculate the critical temperatures for light , moderate , and severe frost at different development stages of the wine grape. The above mentioned indicators at the temperature of frost were analyzed to determine the frost temperature thresholds at differ- ent development stages of ‘ Cabernet Sauvignon ’ . [ Results ] Low temperature had different effects on ‘ Cabernet Sauvignon ’ during the pompom , bud opening , leaf spreading , and new shoot growth stages. The lower the temperature , the higher the frost exposure rate in each development stage. The supercoo- ling point and the semi-lethal temperature ( L T50 ) were gradually increased with the development of the wine grapes. Low temperature tolerance in the pompom stage was the strongest and followed in the bud opening and leaf spreading stages. The tolerance of new shoot growth stage was the weakest. [ Conclusion ] -7.70 ℃ was the turning point for severe frost at the pompom stage , while the critical temperature of bud opening stage was -4.49 ℃. Temperature lower than -2.79 ℃ at the leaf spreading stage caused ir- reversible damage to the wine grape. Furthermore , below -1.62 ℃ in the new shoot growth stage caused severe frost.

All‐inorganic perovskite quantum dots (PQDs) are widely applied in photoelectronics because of their high luminous efficiency. However, PQDs have poor stability, which hinders their practical applications. In this study, controllable crystallization of PQDs is achieved by adding Al2O3 to alter the glass network. Next, Na2CO3 (aq) washing‐heating treatment is used to improve the protective mechanism. Owing to this dual strategy, the prepared CsPbBr3@glass exhibits a high photoluminescence quantum yield (PLQY > 95%) and excellent stability. In a 1000 h accelerated aging experiment, the luminous intensity remains above 96% of the initial intensity. The luminescence intensity shows almost no change after soaking in water for 20 weeks. Finally, the CsPbBr3@CsPbBr1I2@PET light‐conversion film is prepared by the sandwich method. Its color gamut covers 138% of the NTSC 1953 and 102% of the Rec. 2020. This CsPbBr3@glass with a high PLQY and ultrastability will broaden the scope of perovskite materials in displays. [ABSTRACT FROM AUTHOR]

Perovskite quantum dots can form various forms such as nanowires, nanorods, and nanosheets through self‐assembly. Nanoscale self‐assembly can be used to fabricate materials with excellent device properties. This study introduces AuBr3 into CsPb(Br/I)3 quantum dots, causing them to assemble into nanowires. The nanowires form because part of Au3+ is surface‐doped to replace Pb2+, and the [PbX6]4− octahedral structure is distorted. The symmetry of the structural surface is broken, and a dipole‐moment‐induced field is generated, thus promoting self‐assembly. Moreover, the presence of Au nanoparticles (NPs) causes a localized surface plasmon resonance and generates strong van der Waals forces that promote self‐assembly. Finally, to test other applications of perovskite nanowires, the solution method is used to prepare films by compounding the sample solution and polystyrene (PS) for backlighted displays. [ABSTRACT FROM AUTHOR]

In laser illumination, there is considerable interest in phosphor‐converted laser diodes that boast high efficiency and exceptional thermal stability. Phosphor‐in‐glass (PiG) and phosphor‐in‐glass film (PiF) are highly favored for their efficiency, cost‐effectiveness, and ease of fabrication. To tackle the issue of low thermal conductivity of glass, a novel lithium–aluminum–silicate glass is innovatively developed. This glass induces the precipitation of spodumene crystalline phase, enhancing material stability. Utilizing solid‐state sintering techniques, Y3Al3.5Ga1.5O12:Ce3+ (YAGG:Ce) PiG is fabricated, which exhibited a luminous flux (LF) of 866.76 lm under 450 nm blue light with 3.88 W input power. Benefiting from the high thermal conductivity of sapphire substrate and the high‐intensity glass system, YAGG:Ce PiF demonstrated a saturation threshold of 10.20 W, yielding an impressive LF of 2178.1 lm, which is 2.5 times that of PiG samples. Notably, the thermal conductivity increased significantly from 2.2 W m−1K−1 (PiG) to 7.0 W m−1K−1 (PiF), surpassing traditional organic resin materials. To validate the practicality of the two‐color converters, it integrates them into both starlight lamp and laser flashlight modules for encapsulation, thereby generating attractive green light in various environments. This design holds the potential to become the ideal choice for the next generation of high‐power, high‐brightness laser illumination. [ABSTRACT FROM AUTHOR]