Deep red emission from Cs4PbI6/CsPbI3/ZnS heterostructure for enhanced stability and photoluminescence quantum yield

Adhesion, stability, structural and electronic properties of perovskite/BaWO4 heterostructures: first-principles and experimental characterizations

“…[11][12][13][14][15][16] Although perovskite NC heterostructures have been successfully designed to enhance their optical stability and emission intensity, their applications are still limited to a few combinations. [17][18][19][20][21][22] The design of perovskite NC heterostructures in combination with lattice-matched materials is still a topic that requires further investigation.…”

Tuning Conductivity of Lead-Free Cs2AgBiBr6 Double Perovskite Ternary Composite with PEDOT:PSS and Carbon Black for Supercapacitor Application

“…The crystal structure of lead halide perovskites allows material to accommodate various types of defects, such as halide vacancies and antisite defects. This flexibility of lead halide perovskites is thought to contribute to the high defect tolerance which is a key factor for their excellent optoelectronic properties including high absorption coefficients, tunable band gap, high photoluminescence quantum yields, long carrier lifetimes, long electron/hole diffusion lengths, and high charge carrier mobility because of which they have been identified as a promising class of materials for solar cells, light-emitting diodes (LEDs), lasers, photoelectrodes, and optical sensors. − Despite their unprecedented growth in the field of solar cells, LEDs, and other optoelectronic application, the instability of the materials under ambient conditions or in operation inhibits commercialization . The major cause of photo- and field induced degradation is due to the migration of halide ions and ion vacancies.…”

Recent Advances and Perspectives of Metal Halide Perovskite Heteronanocrystals

“…Colloidal heteronanocrystals that combine different semiconductors together through a lattice matched heterointerface are widely known for their excellence in surface passivation and engineering optical and electrical properties, which have fueled significant progress for nanocrystals composed of II–VI, III–V, IV–VI, and I–III–V group semiconductors. − Lead halide perovskite nanocrystals (PNCs) have recently emerged as promising candidates for a broad range of applications in light conversion and harvesting because of their remarkable optical and electrical properties, such as high photoluminescent efficiency, high defect tolerance, and significant cost advantage over classical nanocrystals. − However, the soft ionic nature and low formation energy of the perovskites lead to their labile surface and dynamic ligand capping, which induce rapid decomposition and halide ion segregation when the PNCs are exposed in a combination of light, heat, and moisture. , Fabrication of perovskite heteronanocrystals (PHNCs) by growing a semiconductor with more covalent characteristic on ionic PNCs provides enormous benefits, including minimized surface trap states, increased carrier transfer or exciton recombination, widened tuning range of optical and electrical properties, and significantly improved stability. , Over the past years this has spurred an intense research activity to grow PHNCs with metal salts, , metal chalcogenide, , and metal oxides. , …”

“…7,8 Fabrication of perovskite heteronanocrystals (PHNCs) by growing a semiconductor with more covalent characteristic on ionic PNCs provides enormous benefits, including minimized surface trap states, increased carrier transfer or exciton recombination, widened tuning range of optical and electrical properties, and significantly improved stability. 9,10 Over the past years this has spurred an intense research activity to grow PHNCs with metal salts, 11,12 metal chalcogenide, 13,14 and metal oxides. 15,16 To date, the classical heteronanocrystals are usually synthesized based on the hot-injection route in nonpolar solvents, which involves manipulation of the same reagents and parameters used to synthesize individual nanocrystals.…”