Improving stability and photoluminescence of CsPbBr3 quantum dots/CMC polymer composite for optoelectronics application

Tunable Optoelectronic Properties of CsPbBr3 Perovskite Nanocrystals for Photodetectors Applications

“…The functional groups of the COO – and C–H-stretching modes are represented by the peaks at 1380–1491 and 2864–3030 cm –1 , respectively . The peaks at 1682 and 1003–1107 cm –1 are observed as a result of the CO and C–O stretching bond, respectively, while the peak at 722 cm –1 appears due to the CC stretching of hydrocarbons in long-chained OA and OLA present in the nanocrystals. , This observation is consistent with previous studies on the optical and structural properties of CsPbBr 3 nanocrystals . Overall, these results suggest that the size of the nanocrystals plays a crucial role in determining the optical properties of CsPbBr 3 NCs.…”

“…41,42 This observation is consistent with previous studies on the optical and structural properties of CsPbBr 3 nanocrystals. 35 Overall, these results suggest that the size of the nanocrystals plays a crucial role in determining the optical properties of CsPbBr 3 NCs. The excitonic absorption and steady state PL of all samples are listed in Figure 4.…”

“…The synthesis of CsPbBr 3 nanocrystals (NCs) is according to our previously reported method of ligand-assisted supersaturated recrystallization process synthesized at room temperature. , CsBr (0.2 mmol) and PbBr 2 (0.2 mmol) along with ligands OA (0.5 mL) and OLA (0.25 mL) were dissolved in DMF (5 mL) by continuous stirring. Ligands were used to stabilize the CsBr-PbBr 2 -DMF precursor solution.…”

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

“…10−12 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. 13 The major cause of photo-and field induced degradation is due to the migration of halide ions and ion vacancies. The ion migration in halide perovskites is a doubleedged sword: while it can lead to instability in optoelectronic devices, these same properties can be beneficial for photorechargeable cells and energy storage applications 14 where ionic conductivity can be exploited to improve device performance.…”

“…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.…”