Abstract
Recent advances in perovskite nanocrystals-enhanced solid-state lighting (SSL) and liquid-crystal displays (LCDs) are reviewed. We first discuss the development, optical properties, and stability issue of materials, and then we evaluate the performance of SSL and LCDs with perovskite downconverters adopted. In SSL performance evaluation, we investigate the fitting-curve effect in calculations and optimizations where simple Gaussian fitting and precise fitting are compared in detail, and we further optimize for highly efficient, good color-rendering, and human-healthy SSL sources. For LCD performance evaluation, we study the intrinsic tradeoffs between total light efficiency and color gamut coverage. Through optimizations using real line shapes, Rec. 2020 standard coverage as large as 92.8% can be achieved through hybrid integration. Finally, we briefly discuss two future challenges: materials development and device integration. We believe the emerging perovskite nanocrystals are highly promising for next-generation SSL and LCDs.
Highlights
Since the invention of high-performance blue light-emitting diodes (LEDs) [1,2,3], phosphor-converted white light-emitting diodesdiodes (LED) has found widespread applications, especially in solid-state lighting (SSL) and liquid-crystal display (LCD) backlight, due to its high efficiency, long lifetime, low cost, simple optical configuration, high brightness, and fast response time [4,5,6].The huge market share and still-growing needs promote the studies further
We evaluate the performance of optimized SSL for both RGp B and RYp Gp B types at a fixed correlated color temperatures (CCTs) (2700 K), where luminous efficacy of radiation (LER), color quality scale (CQS), and circadian action factor (CAF) are the three objectives
We have briefly reviewed the recent advances in perovskite nanocrystals-enhanced SSL and LCDs
Summary
Since the invention of high-performance blue light-emitting diodes (LEDs) [1,2,3], phosphor-converted white LED (pc-WLED) has found widespread applications, especially in solid-state lighting (SSL) and liquid-crystal display (LCD) backlight, due to its high efficiency, long lifetime, low cost, simple optical configuration, high brightness, and fast response time [4,5,6]. Crystals 2019, 9, 59 contender for next-generation SSL and LCD backlight As downconverters, they are color-tunable and narrow-band, and easy-to-synthesize and low-cost. They are color-tunable and narrow-band, and easy-to-synthesize and low-cost These properties can potentially fulfill the SSL’s requirements, including high efficiency and capability of tailoring the SPD. The narrow-band emission ensures vivid colors, which are essential for large color gamut LCDs. In this review, we summarize recent advances of perovskite downconverter-enabled high-performance SSL and LCD backlight.
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