A roadmap for the commercialization of perovskite light emitters

Phase‐Transition‐Cycle‐Induced Recrystallization of FAPbI3 Film in An Open Environment Toward Excellent Photodetectors with High Reproducibility

“…[21][22][23] Most state-of-the-art perovskite devices are fabricated by solution-based methods, which require several steps, such as spincoating and annealing, to transform the precursor solution into a final perovskite film. [24][25][26][27][28][29][30] However, these steps are very sensitive to external conditions such as temperature [31,32] or atmosphere. [33,34] Furthermore, mechanical errors such as disturbance in the time point or the volume of dropping antisolvent will also affect the final device.…”

Ligand Chemistry of Inorganic Lead Halide Perovskite Nanocrystals

“…Colloidal nanocrystals are ligand-capped tiny particles with at least one of their dimensions in the range of 1–100 nm and are constituted of hundreds to thousands of atoms. − Because of their extremely small size, they exhibit a high surface-to-volume ratio; thus, the surfaces play a vital role in their optical, electronic, and catalytic properties. ,− Importantly, materials at the nanoscale exhibit unique size-dependent properties that can be harnessed for a variety of applications. ,,, Semiconductor quantum dots (QDs) are one of the most important classes of materials that exhibit size and shape-dependent optical properties. , Over the last few decades, colloidal semiconductor QDs with the compositions of II–VI and III–V groups have been greatly investigated regarding their synthesis and optoelectronic applications. ,, The emission color of QDs is precisely tunable across the visible spectrum of light by their size without changing the composition. ,− However, these classical QDs require an epitaxially coated wide-bandgap inorganic shell that passivates the surface traps to achieve high photoluminescence quantum yields (PLQY), while the organically passivated QDs exhibit low PLQY because of surface-related trap states. Over the last 7–8 years, the research focus has been partially shifted to the newly emerged colloidal lead halide perovskite (LHP) nanocrystals (NCs) because of their remarkable optical and optoelectronic properties, such as near-unity PLQY, narrow emission line widths, tunable emission color by halide composition and by accessing quantum confinement effects, suppressed blinking, and defect tolerant nature. ,− Unlike classical core–shell QDs, organic ligand-capped colloidal halide (Br and I) perovskite NCs without an inorganic shell exhibit extremely high PLQY because of their defect-tolerant nature. , These interesting properties confer them a multitude of applications, including light-emitting diodes (LEDs), near-eye displays for augmented and virtual reality (AR and VR), single-photon emission, photodetectors, lasers, and photovoltaics. ,,− …”

Recent progress of single-halide perovskite nanocrystals for advanced displays

“…Methods to increase the intrinsic stability include A-site and B-site cation engineering to increase the structural stability of perovskites. 134,135 Smaller B-site doping was used to obtain highly efficient and structural stability by inducing lattice contraction. 31,73 Moreover, the epitaxial incorporation of NCs within a semiconducting shell seems to be an efficient strategy (Fig.…”