Recent Research Trends for Improving the Stability of Organo/Inorgano Halide Perovskites

Abstract

Because of their superior optical, and electrical properties, lead halide perovskites have emerged as potential materials for light-emitting-diodes. However, some obstacles have yet to be overcome for practical applications including low exciton binding energy, the difficulty of fabricating uniform perovskite films,, and their instability to heat, light, and moisture. In this review, we focus on strategies to improve the lifetime, and stability of perovskites such as core-shell structure, ligand exchange, and doping.

Optimal Solvents for Interfacial Solution Engineering of Perovskite Solar Cells

“…Equation (2) indicates that the smaller the contact angle, the lower is the Gibbs free energy for nonuniform nucleation, which results in a denser, high-quality film. [53][54][55] The interfacial engineering of the SnO 2 film through this solvent treatment considerably affected the morphology of the perovskite film, as evidenced by field-emission scanning electron microscopy (FESEM) analysis of the pristine and solvent-treated perovskite films (Figure 5d-f ).…”

“…Organic-inorganic hybrid halide perovskites with excellent optoelectronic properties are extensively used in various semiconductor devices, such as solar cells, photodetectors, lightemitting diodes (LEDs), and lasers. [1][2][3][4][5][6][7][8] In particular, perovskite solar cells (PSCs) are attracting considerable attention as nextgeneration photovoltaic technology owing to their high absorption coefficient, low-exciton binding energy, long carrier diffusion length, and straightforward and cost-effective fabrication. Moreover, their power conversion efficiency (PCE) has been rapidly improved from 3.8% to 25.7%.…”

CsPbBr3 and Cs4PbBr6 perovskite light-emitting diodes using a thermally evaporated host–dopant system

“…Although the dual-source evaporation method is more complicated than single-source evaporation, it is suitable for large-area perovskite devices because it enables uniform thin-film growth without pinholes. [54][55][56] Research on manufacturing host-dopant systems through dual-source evaporation has progressed from organic lightemitting diodes (OLEDs). [55][56][57][58][59][60] When tris(8-quinolinolato) aluminum(III) (Alq 3 ) is adopted as the host, 4-(dicyanomethylene)-2-t-butyl-6-(1,1,7,7-tetramethyljulolidyl-9-enyl)-4H-pyran (DCTJB) and 2,3,6,7-tetrahydro-1,1,7,7-tetramethyl-1H,5H,11H-10-(2-benzothiazolyl)quinolizino [9,9a,1gh]coumarin (C545T) were doped as dopants and utilized for red and green emitting layers, respectively.…”

“…[54][55][56] Research on manufacturing host-dopant systems through dual-source evaporation has progressed from organic lightemitting diodes (OLEDs). [55][56][57][58][59][60] When tris(8-quinolinolato) aluminum(III) (Alq 3 ) is adopted as the host, 4-(dicyanomethylene)-2-t-butyl-6-(1,1,7,7-tetramethyljulolidyl-9-enyl)-4H-pyran (DCTJB) and 2,3,6,7-tetrahydro-1,1,7,7-tetramethyl-1H,5H,11H-10-(2-benzothiazolyl)quinolizino [9,9a,1gh]coumarin (C545T) were doped as dopants and utilized for red and green emitting layers, respectively. 61 And inorganic materials such as Cs 2 CO 3 and lithium fluoride (LiF) are doped in Alq 3 , and an improved OLED is fabricated.…”

Recent Patterning Methods for Halide Perovskite Nanoparticles

“…These properties include a tunable band gap, small full width half maximum (FWHM), low-temperature process, and easy synthesis capabilities (making them easy to mass produce); these are excellent properties for optical devices. [11][12][13][14] However, the low stability of halide perovskites makes it difficult to fabricate optical devices, especially via patterning processes.…”