Hydrobromic acid-assisted size control of formamidinium lead bromide perovskite quantum dots at room temperature
Source abstract
Abstract
Abstract Formamidinium lead bromide perovskite (FAPbBr3) nanostructures have aroused increasing attention considering their excellent optoelectronic performance and higher stability than their MA- and Cs-based counterparts. Herein, we synthesized size-tunable FAPbBr3 quantum dots (QDs) at room temperature. The size of the perovskite QDs could be ajusted from 5.4 to 2.3 nm by just varying the amount of Hydrobromic Acid (HBr) added into the precursor. As a result, the photoluminescence (PL) emissions exhibited large blueshift from 531 to 446 nm due to quantum confinement effect. Quantum mechanical calculations of the optical gap fitted well with the experimental results. We found that the addition of HBr not only increased the concentration of the Br− but also protonated the oleylamine ligands. The two events synergically governed the size-decreasing effect of the QDs with increasing amount of HBr. The size-tunable FAPbBr3 QDs showed great application prospect in the field of photoelectric devices.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Perovskite Materials and Applications · Organic Light-Emitting Diodes Research · Quantum Dots Synthesis And Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (36)
Show source-provided references
1. Organometallic halide perovskites: sharp optical absorption edge and its relation to photovoltaic performance10.1021/jz500279b ↗
2. Preparation of single-phase films of CH3NH3Pb(I1–xBrx)3 with sharp optical band edges10.1021/jz501332v ↗
3. Properties and potential optoelectronic applications of lead halide perovskite nanocrystals10.1126/science.aam7093 ↗
4. Lead halide perovskite nanocrystals in the research spotlight: stability and defect tolerance10.1021/acsenergylett.7b00547 ↗
5. Two-Dimensional metal halide perovskites: theory, synthesis, and optoelectronics10.1002/smtd.201600018 ↗
6. In-situ formed type I nanocrystalline perovskite film for highly efficient light-emitting diode10.1021/acsnano.7b00608 ↗
7. Color-pure violet-light-emitting diodes based on layered lead halide perovskite nanoplates10.1021/acsnano.6b02683 ↗
8. Room-temperature ion-exchange-mediated self-assembly toward formamidinium perovskite nanoplates with finely tunable, ultrapure green emissions for achieving Rec. 2020 displays10.1002/adfm.201800248 ↗
9. Efficient green light-emitting diodes based on quasi-two-dimensional composition and phase engineered perovskite with surface passivation10.1038/s41467-018-02978-7 ↗
10. Lead halide perovskite nanowire lasers with low lasing thresholds and high quality factors10.1038/nmat4271 ↗
11. Nanowire lasers of formamidinium lead halide perovskites and their stabilized alloys with improved stability10.1021/acs.nanolett.5b04053 ↗
12. Dimensionality and interface engineering of 2D homologous perovskites for boosted charge-carrier transport and photodetection performances10.1021/acs.jpclett.7b00993 ↗
13. Formamidinium lead trihalide: a broadly tunable perovskite for efficient planar heterojunction solar cells10.1039/c3ee43822h ↗
14. HC(NH2)2PbI3 as a thermally stable absorber for efficient ZnO-based perovskite solar cells10.1039/C6TA01074A ↗
15. Nanocrystals of cesium lead halide perovskites (CsPbX3, X = Cl, Br, and I): novel optoelectronic materials showing bright emission with wide color gamut10.1021/nl5048779 ↗
16. Highly efficient light-emitting diodes of colloidal metal–halide perovskite nanocrystals beyond quantum size10.1021/acsnano.6b07617 ↗
17. Colloidal quantum nanostructures; emerging materials for display applications
18. A. Smith, S. Nie, Smith, A. M. & Nie, S. M. Semiconductor nanocrystals: structure, properties, and band gap engineering. Acc. Chem. Res. 43, 190-200, Accounts of Chemical Research. 43 (2009) 190–200.10.1021/ar9001069 ↗
19. Semiconductor nanocrystals: shape matters10.1038/nmat844 ↗
20. Enhancing exciton binding energy and photoluminescence of formamidinium lead bromide by reducing dimension into 2D nanoplates for efficient light emitting diodes
21. Colloidal synthesis of monolayer-thick formamidinium lead bromide perovskite nanosheets with a lateral size of micrometers10.1039/C8CC01466C ↗
22. Few-layer formamidinium lead bromide nanoplatelets for ultrapure-green and high-efficiency light-emitting diodes10.1007/s12274-018-2197-3 ↗
23. CsPbX 3 quantum dots for lighting and displays: room-temperature synthesis, photoluminescence superiorities, underlying origins and white light-emitting diodes
24. Monodisperse formamidinium lead bromide nanocrystals with bright and stable green photoluminescence10.1021/jacs.6b08900 ↗
25. Stable p-i-n FAPbBr 3 devices with improved efficiency using sputtered ZnO as electron transport layer10.1002/admi.201601143 ↗
26. Shape-controlled synthesis of all-inorganic CsPbBr3 perovskite nanocrystals with bright blue emission10.1021/acsami.6b08528 ↗
27. Brightly luminescent and color-tunable formamidinium lead halide perovskite FAPbX3 (X=Cl, Br, I) colloidal nanocrystals
28. Calculation of the band gap for small CdS and ZnS crystallites10.1103/PhysRevB.39.10935 ↗
29. Retrograde solubility of formamidinium and methylammonium lead halide perovskites enabling rapid single crystal growth10.1039/C5CC06916E ↗
30. Determination of the exciton binding energy and effective masses for methylammonium and formamidinium lead tri-halide perovskite semiconductors10.1039/C5EE03435C ↗
31. Nanometer-sized semiconductor clusters: materials synthesis, quantum size effects, and photophysical properties10.1021/j100155a009 ↗
32. Phonon interaction and phase transition in single formamidinium lead bromide quantum dots10.1021/acs.nanolett.8b01523 ↗
33. Growth mechanism of strongly emitting CH3NH3PbBr3 perovskite nanocrystals with a tunable bandgap10.1038/s41467-017-00929-2 ↗
34. Solution synthesis approach to colloidal cesium lead halide perovskite nanoplatelets with monolayer-level thickness control10.1021/jacs.5b12124 ↗
35. Tunable length and optical properties of few units cell CsPbX3 (X=Cl, Br, I) nanowires10.1021/acs.nanolett.6b04381 ↗
36. Role of Acid−Base equilibria in the size, shape, and phase control of cesium lead bromide nanocrystals10.1021/acsnano.7b08357 ↗