A temperature-reduced method for the rapid growth of hybrid perovskite single crystals with primary alcohols

Höcker, Julian; Brust, Felix; Armer, Melina; Dyakonov, Vladimir

doi:10.1039/d0ce01759k

Cited by 14 publications

(25 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Methylammonium (MA/CH 3 NH 3 ) lead iodine (MAPbI 3 ) single crystals were low temperature solution grown in a reactive inverse temperature crystallization (RITC) process, Ref. 34 As compared to the pure inverse temperature crystallization, instead of pure γ-butyrolactone GBL precursor solvent an alcohol-GBL mixture was used. The mixed precursor solvent polarity is changed causing a lower solubility of MAPbI 3 and an optimization of the nucleation rate and centers, resulting in an earlier crystallization as compared to conventional growth temperatures.…”

Section: Methodsmentioning

confidence: 99%

“…Black MAPbI 3 single crystals were grown at a temperature of 85 • C instead of 110 • C. At room temperature a tetragonal crystal phase with the lattice constants a = 8.93 Å, c = 12.5 Å was determined with XRD. 34 Optical measurements. The sample was placed in a cryostat with temperatures variable from 1.6 K up to 300 K. For T = 1.6 K, the sample is immersed in superfluid helium, while for the temperatures from 4.2 K to 300 K the sample is in cooling helium gas.…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Spin dynamics of electrons and holes interacting with nuclei in MAPbI$_3$ perovskite single crystals

Kirstein,

Yakovlev,

Zhukov

et al. 2022

Preprint

View full text Add to dashboard Cite

Methylammonium lead triiodine (MAPbI 3 ) is a material representative of the hybrid organicinorganic lead halide perovskites which attract currently great attention due to their photovoltaic efficiency and bright optoelectronic properties. Here, the coherent spin dynamics of charge carriers and spin dependent phenomena induced by the carrier interaction with nuclear spins are studied in MAPbI 3 single crystals, using time-resolved Kerr rotation at cryogenic temperatures in magnetic fields up to 3 T. Spin dephasing times up to a few nanoseconds and a longitudinal spin relaxation time of 37 ns are measured. The Larmor spin precession of both resident electrons and holes is identified in the Kerr rotation signals. The Landé factors (gfactors) in the orthorhombic crystal phase show a strong anisotropy, ranging for the holes from −0.28 to −0.71 and for the electrons from +2.46 to +2.98, while the g-factor dispersion of about 1% is rather small. An exciton g-factor of +2.3 is measured by magneto-reflectivity. A dynamic nuclear polarization by means of spin polarized electrons and holes is achieved in tilted magnetic fields giving access to the carrier-nuclei exchange interaction and the nuclei spin relax-ation time exceeding 16 minutes.

show abstract

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Spin dynamics of electrons and holes interacting with nuclei in MAPbI$_3$ perovskite single crystals

Kirstein,

Yakovlev,

Zhukov

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

“…MAPbI 3 single crystals were low temperature solution grown in a reactive inverse temperature crystallization (ITC) process. 64 As compared to the pure inverse temperature crystallization instead the pure γ-butyrolactone (GBL) precursor solvent, an alcohol-GBL mixture was used. The polarity of the mixed precursor changes, which leads to the lower solubility of the dissociated perovskite MAPbI 3 , and thus to an optimization of the nucleation rate.…”

Section: Methodsmentioning

confidence: 99%

“…Black MAPbI 3 single crystals were obtained at a temperature of 85 • C instead of about 110 • C. At room temperature a tetragonal phase with lattice constant a = 0.893 nm and c = 1.25 nm was determined with X-ray diffraction (XRD) technique. 64 The size of the crystal is about 2 × 2 × 2 mm 3 . The crystal shape is noncuboid, but the crystal structure exhibits arisotype cubic symmetry.…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Photon echo polarimetry of excitons and biexcitons in a CH$_3$NH$_3$PbI$_3$ perovskite single crystal

Trifonov,

Grisard,

Kosarev

et al. 2021

Preprint

View full text Add to dashboard Cite

Lead halide perovskites show remarkable performance when used in photovoltaic and optoelectronic devices. However, the peculiarities of light-matter interactions in these materials in general are far from being fully explored experimentally and theoretically. Here we specifically address the energy level order of optical transitions and demonstrate photon echos in a methylammonium lead triiodide single crystal, thereby determining the optical coherence times T 2 for excitons and biexcitons at cryogenic temperature to be 0.79 ps and 0.67 ps, respectively. Most importantly, we have developed an experimental photon-echo polarimetry method that not only identifies the contributions from exciton and biexciton complexes, but also allows accurate determination of the biexciton binding energy of 2.4 meV, even though the period of quantum beats between excitons and biexcitons is much longer than the coherence times of the resonances. Our experimental and theoretical analysis methods contribute to the understanding of the complex mechanism of quasiparticle interactions at moderate pump density and show that even in high-quality perovskite crystals and at very low temperatures, inhomogeneous broad-ening of excitonic transitions due to local crystal potential fluctuations is a source of optical dephasing.

show abstract

Pre‐Nucleation Strategy for Room‐Temperature Growth of Perovskite Single Crystals toward Efficient Perovskite Light‐Emitting Diodes

Wang,

Tian,

Cheng

et al. 2024

Adv Funct Materials

View full text Add to dashboard Cite

Metal lead perovskite (MHP) single crystals (SCs) with extraordinary optical properties are promising candidates for high‐performance SC‐based perovskite light‐emitting diodes (SC‐PeLEDs). However, the heating process involved in traditional methods to initiate crystal nucleation and growth inevitably induces massive defects in MHP SCs, leading to inferior electroluminescence performance and poor operational stability of the SC‐PeLEDs. Preparation of low‐defect thin MHP SCs for high‐performance SC‐PeLEDs remains a formidable challenge. Here, a facile pre‐nucleation strategy is developed to enable room‐temperature (RT) growth of high‐quality MAPbBr3 (MA+ = CH3NH3+) SCs. By avoiding the detrimental effect of high growth temperature, the MAPbBr3 SCs prepared at RT show improved crystallinity with lower trap‐state density, giving rise to higher photoluminescence quantum yield and uniform fluorescence. Consequently, the MAPbBr3‐based SC‐PeLEDs achieve a high external quantum efficiency up to 9.7%, along with an ultrahigh luminance of 126 800 cd m−2, which is among the highest for MAPbBr3‐based SC‐PeLEDs. Moreover, the SC‐PeLEDs demonstrate remarkably high operational stability with half‐lifetimes as long as 594 min and 33.2 min at initial luminances of ≈1000 cd m−2 and ≈10 000 cd m−2, respectively. The work has excellent universality and paves the way toward the fabrication of high‐performance SC‐PeLEDs for future lighting, display, and laser applications.

show abstract

A temperature-reduced method for the rapid growth of hybrid perovskite single crystals with primary alcohols

Abstract: Blending the primary alcohols and organo-lead trihalide perovskite (OLTP) precursors solutions with the stoichiometry ABX3 (A = MA+ or FA+; B = Pb2+; X = Cl-, Br- or I-) leads...

Cited by 14 publications

References 38 publications

Spin dynamics of electrons and holes interacting with nuclei in MAPbI$_3$ perovskite single crystals

Spin dynamics of electrons and holes interacting with nuclei in MAPbI$_3$ perovskite single crystals

Photon echo polarimetry of excitons and biexcitons in a CH$_3$NH$_3$PbI$_3$ perovskite single crystal

Pre‐Nucleation Strategy for Room‐Temperature Growth of Perovskite Single Crystals toward Efficient Perovskite Light‐Emitting Diodes

Contact Info

Product

Resources

About