Ultrafast carrier dynamics of metal halide perovskite nanocrystals and perovskite-composites

Mondal, Navendu; De, Apurba; Das, Somnath; Paul, Sumanta; Samanta, Anunay

doi:10.1039/c9nr01745c

Cited by 78 publications

(104 citation statements)

References 177 publications

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“…These properties are fundamentally important in studying the electron structure and physical process of complicated systems-the perovskite-based heterojunctions. [168] So far, it is still a developing field with new phenomena and mechanisms emerging. Reproduced with permission.…”

Section: Photophysic Process In Perovskitementioning

confidence: 99%

Perovskite Nano‐Heterojunctions: Synthesis, Structures, Properties, Challenges, and Prospects

Wang

2020

Small Structures

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Scientific and industrial interest on perovskite semiconductor materials has grown rapidly in recent years. Through the efforts of researchers professionals in chemistry, physics, materials and electronics, etc., many records based on perovskites have been and are being refreshed. The brilliant performances emerge not only from the excellent properties of perovskite themselves, but also originate from the composite material systems of hybridizing perovskites with heteromaterials. Herein, first, the crystal and nanostructures of perovskite materials, semiconductor-based heterojunctions, and the categories of perovskite heterojunction are fundamentally introduced. Then, the state-of-the-art synthesis methods, size and structure control, electron structure-related physical properties, and applications of the perovskite-based nano-heterojunctions are comprehensively reviewed. Finally, perspectives on tackling challenges and developing trends are discussed.

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Section: Photophysic Process In Perovskitementioning

confidence: 99%

Perovskite Nano‐Heterojunctions: Synthesis, Structures, Properties, Challenges, and Prospects

Wang

2020

Small Structures

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Section: Crystal Structure and Optoelectronic Properties Of Perovskitmentioning

confidence: 99%

“…B. Schematic illustration of a typical TA signal and different photoinduced processes in a semiconductor, where A and B represent hot exciton/carrier‐induced and ground state bleach, respectively, and C and D represent the signal due to stimulated emission and excited state absorption, respectively. Reproduced with permission . Copyright 2019 Royal Society of Chemistry.…”

Section: Crystal Structure and Optoelectronic Properties Of Perovskitmentioning

confidence: 99%

“…Reproduced with permission. 76 Copyright 2019 Royal Society of Chemistry. B. Schematic illustration of a typical TA signal and different photoinduced processes in a semiconductor, where A and B represent hot exciton/carrier-induced and ground state bleach, respectively, and C and D represent the signal due to stimulated emission and excited state absorption, respectively.…”

Section: Hot Injectionmentioning

confidence: 99%

“…Reproduced with permission. 76 Copyright 2019 Royal Society of Chemistry. C. TA spectra of CsPbBr 3 NCs (λ ex = 350 nm) at different delay times (50 fs to 2000 ps) highlighting formation and decay of various TA signals.…”

Section: Hot Injectionmentioning

confidence: 99%

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Metal halide perovskite nanocrystals and their applications in optoelectronic devices

Wang

et al. 2019

InfoMat

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In recent years, metal halide perovskite nanocrystals (NCs) have been favored by many researchers due to their unique properties including long carrier diffusion length, high carrier mobility, tunable emission wavelength, and narrow full width at half maximum, making them great application potentials in optoelectronic devices. The photoluminescence quantum yields of perovskite NCs are nearly 100%, and the device efficiency of perovskite NC‐based light‐emitting diodes (LEDs) has been improved significantly from below 0.1% to over 20%. In addition, perovskite NC‐based solar cells and photodetectors have also developed rapidly in recent years. Here, we summarize the synthesis and the basic optoelectronic properties of metal halide perovskite NCs and introduce their applications in LEDs, solar cells, and photodetectors.

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Polaron and Spin Dynamics in Organic–Inorganic Lead Halide Perovskite Nanocrystals

Shrivastava

Bodnarchuk

Hazarika

et al. 2020

Advanced Optical Materials

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Long‐lived carrier population and spin‐based behavior in lead halide perovskite nanocrystals (NCs) are extremely interesting for implementing photovoltaic devices with efficiencies exceeding the Shockley–Queisser limit and quantum information processing, respectively. However, a comprehensive understanding of polaron‐mediated charge carrier interactions and an accurate description of the spin‐polarized states for spintronics are still lacking. Herein, the carrier and spin interactions are studied under controlled conditions in FAPbI3 and Cs0.01FA0.99Pb(Br0.11I0.89)3 NCs through ultrafast transient absorption (TA) spectroscopy. At early timescales, TA spectrum shows an asymmetric derivative feature originating from the hot carrier‐induced spectral redshift in FAPbI3 NCs (55 ± 3 meV) and Cs0.01FA0.99Pb(Br0.11I0.89)3 NCs (54 ± 2 meV) at the bandedges that stabilizes to 9 ± 1 and 11 ± 2 meV, respectively, at 1 ps due to the polaron formation. The kinetic analysis indicates that the polaron populations in FAPbI3 and Cs0.01FA0.99Pb(Br0.11I0.89)3 NCs decay with an average lifetime of 657 ± 34 and 532 ± 28 ps, respectively. The circular polarization‐resolved TA reveals that polaron formation can control spin relaxation in NCs, thus providing a powerful tool to explore the development of their prospective applications in spintronics.

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Ultrafast carrier dynamics of metal halide perovskite nanocrystals and perovskite-composites

Abstract: Studies on ultrafast dynamics of various photo-induced processes in perovskite nanocrystals and their composites, and insights obtained from them are presented in this review.

Cited by 78 publications

References 177 publications

Perovskite Nano‐Heterojunctions: Synthesis, Structures, Properties, Challenges, and Prospects

Perovskite Nano‐Heterojunctions: Synthesis, Structures, Properties, Challenges, and Prospects

Metal halide perovskite nanocrystals and their applications in optoelectronic devices

Polaron and Spin Dynamics in Organic–Inorganic Lead Halide Perovskite Nanocrystals

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