Light quality shows strong effects on humans in many aspects, including aesthetics, psychology, physiology, and health. By assuming that natural light has the best light quality, devising a pseudo‐natural light is hence important and critical. Here, an all‐weather pseudo‐natural light is demonstrated based on a high number of broad‐band emitters. By doping six broad‐band organic light‐emitting dyes in three separate emission layers, for example, the light source can exhibit a 92–96% similarity with the sunlight from dawn to dusk, and a color gamut of 80% in terms of NTSC. By combining six narrow‐band light‐emitting diodes (LEDs), a much wider gamut of 121% NTSC is achievable, but with a slightly poor daylight similarity, i.e., ranging between 80% and 83%. The daylight similarity, however, can easily be enhanced to at least 94% upon incorporating broad‐band phosphors, even with the use of only one or two LEDs.

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Dependences of gas-barrier performance on the deposition temperature of atomic-layer-deposited (ALD) AlO, HfO, and ZnO films were studied to establish low-temperature ALD processes for encapsulating organic light-emitting diodes (OLEDs). By identifying and controlling the key factors, i.e. using HO as an oxidant, laminating AlO with HfO or ZnO layers into AHO or AZO nanolaminates, and extending purge steps, OLED-acceptable gas-barrier performance (water vapor transmission rates ∼ 10 g m d) was achieved for the first time at a low deposition temperature of 50 °C in a thermal ALD mode. The compatibility of the low-temperature ALD process with OLEDs was confirmed by applying the process to encapsulate different types of OLED devices, which were degradation-free upon encapsulation and showed adequate lifetime during accelerated aging tests (pixel shrinkage <5% after 240 h at 60 °C/90% RH).

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This study aims to explore the impact of gender and anxiety on various preventative health behaviors, and the relationships among these preventative health behaviors, individual well-being and depression, from the perspective of altruism. This study employed an online questionnaire survey, and 136 males and 204 females participated in the survey. The results of this study showed that females exhibited better preventative health behaviors than males, including hygiene habits, social distancing and behaviors intended to help others mitigate the epidemic. Anxiety regarding COVID-19 infection encouraged individuals to adopt hygienic habits and social distancing measures rather than to help others mitigate the epidemic. Hygiene habits improved the individual’s psychological well-being. Helping others mitigate the epidemic improved the individual’s psychological well-being and social well-being and contributed to reducing individual depression. However, the preventative health behavior involved in social distancing was not conducive to emotional well-being or social well-being. Affective elements are related to individual behaviors. Therefore, the use of prosocial, altruistic language may play an important role with respect to encouraging people to comply with preventative health behaviors in the context of COVID-19. In addition, it is worth noting that different preventative health behaviors may have different effects on people’s mental health, especially when implementing social distancing-related epidemic mitigation behaviors. The question of how to prevent negative psychological effects in restricted actors must be answered, and the degree of life satisfaction experienced by those actors must also be taken into account.