Recent progress and future prospects on halide perovskite nanocrystals for optoelectronics and beyond

Mu, Yuncheng; He, Ziyu; Wang, Kun; Pi, Xiaodong; Zhou, Shu

doi:10.1016/j.isci.2022.105371

Cited by 19 publications

(17 citation statements)

References 350 publications

(516 reference statements)

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“…It is worth noting that the PCE of CsPbBr 3 solar cells with gold electrode typically have a PCE < 6% although gold has been frequently used for high performance hybrid perovskite solar cells. 12,26,41 Recent studies indicate that the PCE of CsPbBr 3 solar cells can be greatly improved to be >10% when gold electrode is replaced by carbon electrode. [42][43][44][45] It is expected that significant improvement could be further achieved through optimizing the device configuration by taking advantages of the carbon electrode for CsPbBr 3 solar cells.…”

Section: Resultsmentioning

confidence: 99%

Efficient thin-film perovskite solar cells from a two-step sintering of nanocrystals

et al. 2023

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Section: Resultsmentioning

confidence: 99%

Efficient thin-film perovskite solar cells from a two-step sintering of nanocrystals

et al. 2023

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Section: Introductionmentioning

confidence: 99%

“…Halide perovskite nanocrystals (HPNCs) are potentially attractive for optoelectronic devices, even at the industrial level, due to their fascinating luminescent and light-harvesting properties. , They have demonstrated near-unity photoluminescence quantum yield (PLQY) by surface engineering with ligands. , However, their stability under ambient conditions is one of the biggest challenges for their practical applications . Compared to widely investigated hybrid organic–inorganic perovskites, all-inorganic halide perovskites possess higher stability, , although they are still far from the desired levels for real-life applications.…”

Section: Introductionmentioning

confidence: 99%

Cu-Doping Induced Phase Transformation in CsPbI₃ Nanocrystals with Enhanced Structural Stability and Photoluminescence Quantum Yield

et al. 2023

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The synthesis of air-stable and cubic phases of all-inorganic halide perovskite nanocrystals (HPNCs) by a hot-injection approach is still challenging due to their rapid in situ phase transformations. Therefore, understanding and preventing this phase conversion by doping of cations is the key to improve the structural stability, environmental durability, and photoluminescence quantum yield. Here, the doping of divalent Cu ions at the Pb-site of cesium lead iodide (CsPbI3) is reported to achieve cubic-phase (α-phase) HPNCs with superior quantum yield and enhanced stability compared to undoped CsPbI3. Rietveld refined X-ray diffraction patterns and atomic-resolution transmission electron microscopy analyses reveal structural transformation from a mixed (γ-orthorhombic and α-cubic) phase to a cubic (α-CsPbI3) one with a smaller lattice constant at an optimal (5.6%) Cu concentration. Computational density functional theory (DFT) analysis credits the resultant structural and environmental stability for the Cu-doped sample to the charge accumulation at the dopant site that leads to increased bond strength with consequent minimization of the energy of the system to give rise to the maximum stability of the HPNCs at this dopant ratio. With the increase of Cu-doping, a red shift is observed in the absorbance and photoluminescence spectra up to a critical doping level, making the system optically tuneable. The optimally doped (5.6% Cu) CsPbI3 HPNCs exhibit stronger light emission with higher carrier lifetime and higher quantum yield (>80%), which are absolutely essential requirements in air-stable optoelectronic devices.

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“…In comparison to bulk perovskites, perovskite nanocrystals (NCs) appear to be better positioned for synaptic memristors with low power consumption approaching or even surpassing biological synapses . On one hand, the increase of the specific surface area is usually accompanied by the exposure of more surface and edge sites, which is easy to form ion vacancy defects .…”

mentioning

confidence: 99%

“…16,17 In comparison to bulk perovskites, perovskite nanocrystals (NCs) appear to be better positioned for synaptic memristors with low power consumption approaching or even surpassing biological synapses. 18 On one hand, the increase of the specific surface area is usually accompanied by the exposure of more surface and edge sites, which is easy to form ion vacancy defects. 19 On the other hand, the increase of the surface and interface can provide more transport channels for ion migration, which is beneficial for reducing the energy barrier of ion migration.…”

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Solution-Processed Synaptic Memristors Based on Halide Perovskite Nanocrystals

Liu

Guan

Yin

et al. 2022

J. Phys. Chem. Lett.

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Exploring new materials and structures to construct synaptic devices represents a promising route to fundamentally approach novel forms of computing. Nanocrystals (NCs) of halide perovskites possess unique charge transport characteristics, i.e., ionic−electronic coupling, holding considerable promise for energy-efficient and reconfigurable artificial synapses. Herein, we report solution-processed thin-film memristors from all-inorganic CsPbBr 3 perovskite NCs, functioning as an electrically programmable analog memory with good stability. The devices are demonstrated to successfully emulate a number of essential synaptic functions with low power consumption, including reversible potentiation and depression, short-term plasticity (STP), paired-pulse facilitation (PPF), and long-term plasticity (LTP), such as spike-number-dependent plasticity (SNDP), spike-rate-dependent plasticity (SRDP), spike-timing-dependent plasticity (STDP), and spike-voltage-dependent plasticity (SVDP). It is proposed that a coupled capacitive and inductive phenomenon originating from charge trapping and ion migration in CsPbBr 3 NC films, controlled by the amplitude and timing of the programming pulses, defines the degree of synaptic plasticity. A transition emerges from the fast traprelated capacitive regime to a slow ionic inductive regime, which enables continuous change of the film resistance and the magnitude of the electronic current, analogous to the synaptic weight modulation in biological synapses.

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Recent progress and future prospects on halide perovskite nanocrystals for optoelectronics and beyond

Cited by 19 publications

References 350 publications

Efficient thin-film perovskite solar cells from a two-step sintering of nanocrystals

Efficient thin-film perovskite solar cells from a two-step sintering of nanocrystals

Cu-Doping Induced Phase Transformation in CsPbI₃ Nanocrystals with Enhanced Structural Stability and Photoluminescence Quantum Yield

Solution-Processed Synaptic Memristors Based on Halide Perovskite Nanocrystals

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Recent progress and future prospects on halide perovskite nanocrystals for optoelectronics and beyond

Cited by 19 publications

References 350 publications

Efficient thin-film perovskite solar cells from a two-step sintering of nanocrystals

Efficient thin-film perovskite solar cells from a two-step sintering of nanocrystals

Cu-Doping Induced Phase Transformation in CsPbI3 Nanocrystals with Enhanced Structural Stability and Photoluminescence Quantum Yield

Solution-Processed Synaptic Memristors Based on Halide Perovskite Nanocrystals

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Cu-Doping Induced Phase Transformation in CsPbI₃ Nanocrystals with Enhanced Structural Stability and Photoluminescence Quantum Yield