Reversible Thermochromism in All‐Inorganic Lead‐Free Cs3Sb2I9 Perovskite Single Crystals

Singh, Anupriya; Satapathi, Soumitra

doi:10.1002/adom.202101062

Cited by 33 publications

(22 citation statements)

References 34 publications

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“…It is noted that size of the obtained single crystals can be increased even further by using a bigger scintillation vial, significantly larger than most of the other Pb‐free perovskites. [ 25 , 26 , 27 , 28 ] The large‐scale uniform rod morphology lays the foundation for the design of centimeter‐level single‐crystal devices. [ 28 , 29 ] It is important to note that the successful application of this method for crystallization depends on the use of H 3 PO 2 , which was added to prevent the oxidation of Cu + , [ 17 ] otherwise nonluminescent Cu 2+ ‐contained compounds can be produced (Figure S1 , Supporting Information).…”

Section: Resultsmentioning

confidence: 99%

Organic–Inorganic Hybrid Cuprous‐Based Metal Halides for Warm White Light‐Emitting Diodes

Meng

Wang

et al. 2022

Advanced Science

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Single-component emitters with stable and bright warm white-light emission are highly desirable for high-efficacy warm white light-emitting diodes (warm-WLEDs), however, materials with such luminescence properties are extremely rare. Lowdimensional lead (Pb) halide perovskites can achieve warm white photoluminescence (PL), yet they suffer from low stability and PL quantum yield (PLQY). While Pb-free air-stable perovskites such as Cs 2 AgInCl 6 emit desirable warm white light, sophisticated doping strategies are typically required to increase their PL intensity. Moreover, the use of rare metal-bearing compounds along with the typically required vacuum-based thin-film processing may greatly increase their production cost. Herein, organic-inorganic hybrid cuprous (Cu + )-based metal halide MA 2 CuCl 3 (MA = CH 3 NH 3 + ) that meets the requirements of i) nontoxicity, ii) high PLQY, and iii) dopant-free is presented. Both single crystals and thin films of MA 2 CuCl 3 can be facilely prepared by a low-cost solution method, which demonstrate bright warm white-light emission with intrinsically high PLQYs of 90-97%. Prototype electroluminescence devices and down-conversion LEDs are fabricated with MA 2 CuCl 3 thin films and single crystals, respectively, which show bright luminescence with decent efficiencies and operational stability. These findings suggest that MA 2 CuCl 3 has a great potential for the single-component indoor lighting and display applications.

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Section: Resultsmentioning

confidence: 99%

Organic–Inorganic Hybrid Cuprous‐Based Metal Halides for Warm White Light‐Emitting Diodes

Meng

Wang

et al. 2022

Advanced Science

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“…In contrast, replacing lead with low toxic or nontoxic ions, such as Sn, Ge, Cu, Bi, and Sb, will result in environmentally friendly perovskites with outstanding photoelectric properties, which has been revealed by pioneering studies (Figure ). − For example, Seo et al demonstrated 2D perovskites (DA) 2 MnCl 4 (DA = decylammonium) and (NA) 2 CuBr 4 (NA = nonylammonium) with narrow hysteresis and pressure-sensitive order–disorder phase transitions (Figure ).…”

Section: Perovskitementioning

confidence: 99%

Section: Perovskitementioning

confidence: 99%

Thermochromic Energy Efficient Windows: Fundamentals, Recent Advances, and Perspectives

Zhang

Zhou

et al. 2023

Chem. Rev.

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Thermochromic energy efficient windows represent an important protocol technology for advanced architectural windows with energy-saving capabilities through the intelligent regulation of indoor solar irradiation and the modulation of window optical properties in response to real-time temperature stimuli. In this review, recent progress in some promising thermochromic systems is summarized from the aspects of structures, the micro-/mesoscale regulation of thermochromic properties, and integration with other emerging energy techniques. Furthermore, the challenges and opportunities in thermochromic energy-efficient windows are outlined to promote future scientific investigations and practical applications in building energy conservation.

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“…The high temperature phase would be converted back to the low temperature phase in moist environments. Recently, lead-free perovskites are developed, [33,34] of which the TC properties are induced by the length change of chemical bonds under different temperatures. For instance, the cesium silver bismuth bromide (Cs 2 AgBiBr 6 ) shows a slight color transition from 25 °C (light red) to 100 °C (dark red) due to the changes in the bond lengths of AgBr and BiBr.…”

Section: Thermo-responsive Materialsmentioning

confidence: 99%

Solar and Thermal Radiation‐Modulation Materials for Building Applications

Chai

Fan

2022

Advanced Energy Materials

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the building envelope, which mainly consists of transparent and opaque components. For transparent components (e.g., window), the STRMMs should have high transparency of visible light (0.38-0.76 µm) under both hot and cold ambient conditions to guarantee natural lighting. Nearinfrared (NIR) light (0.77-2.5 µm), which accounts for 52% of solar heat, [9] should be reflected in summer for cooling purpose but be transmitted into room in winter to induce solar heat gains. For opaque components (e.g., wall), the STRMMs should have high reflectance of both visible and NIR lights in summer but low reflectance of both lights in winter. Meanwhile, as both transparent and opaque components continuously emit thermal radiation into the outdoor ambient, the STRMMs should have low infrared thermal emissivity in winter to suppress radiative heat loss but high infrared thermal emissivity in summer to accelerate radiative heat dissipation. Figure 1b shows the ideal optical properties of STRMMs applied on transparent and opaque components in both heating and cooling modes. Existing reviews mainly focused on the daytime radiative cooling materials with fixed solar reflectance and thermal emissivity, [10][11][12] which only helps reduce building cooling loads in summer but inevitably increases building heating loads in winter, leading to limited building energy savings. Recently, owing to the rapid development of material science, the STRMMs have been widely explored, which can dynamically modulate the optical properties under external triggers (e.g., thermo and electrical) to accommodate the heating/cooling needs of building in different seasons, showing improved building energy-saving potentials. [13][14][15][16][17] Although there are reviews reporting the materials with modulating optical properties, [15,18] they merely focused on either solar or thermal radiation modulation, which provide limited or even negative building energy savings, which may mislead the researchers to design low energy-efficient materials in practice. For instance, the thermochromic (TC) window can achieve low solar transmittance in hot season but high solar transmittance in cold season. [13,19] Nonetheless, it maintains high thermal emissivity (above 90%) in both seasons. This would accelerate heat loss of building in cold season, and result in limited energy savings. The vanadium dioxide (VO 2 )-based Fabry-Perot (FP) resonator can achieve low thermal emissivity in cold season but high thermal emissivity in hot season, while it maintains constant solar absorptance (25%) in both seasons. This would induce much more solar heating than the conventional cooling materials with smaller solar absorptance (10%), resulting in Regulation of solar and thermal radiation of building envelope shows huge energy-saving potentials. Existing reviews mainly focus on the materials with fixed solar and thermal optical properties. Although there are reviews reporting the materials with modulated optical properties (e.g., radiative cooling materials with modulating thermal emi...

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Reversible Thermochromism in All‐Inorganic Lead‐Free Cs₃Sb₂I₉ Perovskite Single Crystals

Cited by 33 publications

References 34 publications

Organic–Inorganic Hybrid Cuprous‐Based Metal Halides for Warm White Light‐Emitting Diodes

Organic–Inorganic Hybrid Cuprous‐Based Metal Halides for Warm White Light‐Emitting Diodes

Thermochromic Energy Efficient Windows: Fundamentals, Recent Advances, and Perspectives

Solar and Thermal Radiation‐Modulation Materials for Building Applications

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