Bandgap narrowing and piezochromism of doped two-dimensional hybrid perovskite nanocrystals under pressure

Shi, Yue; Jin, Zongqing; Lv, Pengfei; Wang, Kai; Xiao, Guanjun; Bo, Zhishan

doi:10.1039/d2tc05158c

Cited by 5 publications

(2 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…High-pressure studies of lower-dimensional nanoperovskites and nanodouble perovskites are still relatively new with few published reports available. − In one example, Zou et al showed that 2D lead-free halide perovskite Cs 3 Bi 2 Br 9 NCs exhibit a band gap narrowing of about 0.69 eV originating from Bi–Br bond contractions and Br–Bi–Br bond angle changes . The band gap reduction rate increases at ∼6 GPa, which is attributed to the trigonal to monoclinic phase transition under compression.…”

Section: Pressure-induced Structural and Property Changes In Perovski...mentioning

confidence: 99%

Theoretical and Experimental Advances in High-Pressure Behaviors of Nanoparticles

Meng,

Vu,

Criscenti

et al. 2023

Chem. Rev.

View full text Add to dashboard Cite

Using compressive mechanical forces, such as pressure, to induce crystallographic phase transitions and mesostructural changes while modulating material properties in nanoparticles (NPs) is a unique way to discover new phase behaviors, create novel nanostructures, and study emerging properties that are difficult to achieve under conventional conditions. In recent decades, NPs of a plethora of chemical compositions, sizes, shapes, surface ligands, and self-assembled mesostructures have been studied under pressure by in-situ scattering and/or spectroscopy techniques. As a result, the fundamental knowledge of pressure–structure–property relationships has been significantly improved, leading to a better understanding of the design guidelines for nanomaterial synthesis. In the present review, we discuss experimental progress in NP high-pressure research conducted primarily over roughly the past four years on semiconductor NPs, metal and metal oxide NPs, and perovskite NPs. We focus on the pressure-induced behaviors of NPs at both the atomic- and mesoscales, inorganic NP property changes upon compression, and the structural and property transitions of perovskite NPs under pressure. We further discuss in depth progress on molecular modeling, including simulations of ligand behavior, phase-change chalcogenides, layered transition metal dichalcogenides, boron nitride, and inorganic and hybrid organic–inorganic perovskites NPs. These models now provide both mechanistic explanations of experimental observations and predictive guidelines for future experimental design. We conclude with a summary and our insights on future directions for exploration of nanomaterial phase transition, coupling, growth, and nanoelectronic and photonic properties.

show abstract

Section: Pressure-induced Structural and Property Changes In Perovski...mentioning

confidence: 99%

Theoretical and Experimental Advances in High-Pressure Behaviors of Nanoparticles

Meng,

Vu,

Criscenti

et al. 2023

Chem. Rev.

View full text Add to dashboard Cite

show abstract

“…By combining the in situ high-pressure PL experiments with PEA 2 PbBr 4 films (Figure S4), we attributed the observed characteristic peaks to specific phases. The peaks at 414, 440, 469, and 521 nm correspond to the n = 1, n = 2, n = 3, and n = ∞ phases, respectively. − As the pressure increased, all four PL peaks exhibited red-shifts with intensity changes, as shown in Figure S5. At 1.62 GPa, the PL peaks of the n = 3 and n = ∞ phases nearly disappeared, indicating phase transitions in these phases, while the n = 1 PL intensity increased (Figure a).…”

mentioning

confidence: 99%

Pressure-Induced Changes in the Phase Distribution and Carrier Dynamics of Quasi-Two-Dimensional Ruddlesden–Popper Perovskites

Hu,

Niu,

Jiang

et al. 2024

J. Phys. Chem. Lett.

View full text Add to dashboard Cite

Quasi-two-dimensional (quasi-2D) perovskites hold significant potential for diverse design strategies due to their tunable structures, exceptional optical properties, and environmental stability. Due to the complexity of the structure and carrier dynamics, characterization methods such as photoluminescence and absorption spectroscopy can observe but cannot precisely distinguish or identify the phase distribution within quasi-2D perovskite films or correlate phases with carrier dynamics. In this study, we used pressure to modulate the intralayer and interlayer structures of (PEA) 2 Cs n−1 Pb n Br 3n+1 quasi-2D perovskite films, investigating charge carrier dynamics. Steady-state spectroscopy revealed phase transitions at 1.62, 3, and 8 GPa, with free excitons transforming into self-trapped excitons after 8 GPa. Transient absorption spectroscopy elucidated the structural evolution, energy transfer, and pressure-induced transition mechanisms. The results demonstrate that combining pressure and spectroscopy enables the precise identification of phase distribution and pressure response ranges and reveals photophysical mechanisms, providing new insights for optimizing optoelectronic materials.

show abstract

Band gap tailoring with octahedral distortion and bader charge analysis for 2D-Ruddlesden–Popper monolayer tin halide perovskites

Javed

Noureddine

Benkraouda

2023

Materials Science in Semiconductor Processing

View full text Add to dashboard Cite

Bandgap narrowing and piezochromism of doped two-dimensional hybrid perovskite nanocrystals under pressure

Abstract: Two-dimensional (2D) halide perovskites that incorporate organic interlayers greatly improve the environmental stability and optical tunability. Here, we provide a facile pressure engineering to achieve the control of optical features...

Cited by 5 publications

References 40 publications

Theoretical and Experimental Advances in High-Pressure Behaviors of Nanoparticles

Theoretical and Experimental Advances in High-Pressure Behaviors of Nanoparticles

Pressure-Induced Changes in the Phase Distribution and Carrier Dynamics of Quasi-Two-Dimensional Ruddlesden–Popper Perovskites

Band gap tailoring with octahedral distortion and bader charge analysis for 2D-Ruddlesden–Popper monolayer tin halide perovskites

Contact Info

Product

Resources

About