Packing-Shape Effects of Optical Properties in Amplified Spontaneous Emission through Dynamics of Orbit–Orbit Polarization Interaction in Hybrid Perovskite Quantum Dots Based on Self-Assembly

Zhu, Xixiang; Dai, Shu-Wen; Lai, Ying-Lin; Dou, Yixuan; Wang, Miaosheng; Ho, Jian-Syun; Chang, Young-Il; Chuang, Yung‐Tang; Lin, Hao‐Wu; Hu, Bin

doi:10.1021/acs.jpclett.1c02978

Cited by 3 publications

(1 citation statement)

References 57 publications

(73 reference statements)

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“…The orbital momentum provides the precondition to realize the interaction between incident electromagnetic waves and photoinduced polarizations when electrons are excited by high-power laser excitation, leading to multi-photon absorption up-conversion ASE. Furthermore, our previous work has found that long-range orbital-orbital polarization interactions occur at the generation of ASE in perovskite, which provides the necessary conditions for coherent interactions between light-emitting excitons through polarization-dependent ASE studies [18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 97%

Achieving Up-Conversion Amplified Spontaneous Emission through Spin Alignment between Coherent Light-Emitting Excitons in Perovskite Microstructures

Zhu

Xie

2022

Photonics

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Metal hybrid perovskites have presented interesting infrared-to-visible up-conversion light-emitting lasing properties through multi-photon absorption. Here, when the optical pumping switches between circular and linear polarization, up-conversion amplified spontaneous emission (ASE) intensity exhibits large and small amplitudes, respectively, leading to a positive up-conversion ΔASE in the CsPbBr3 perovskite microrods. This observed phenomenon demonstrates that the coherent interaction between coherent light-emitting excitons is indeed established at the up-conversion ASE regime in the CsPbBr3 perovskite microrods. In addition, the positive up-conversion ΔASE indicates the orbital magnetic dipoles between coherent light-emitting excitons are conserved during up-conversion ASE action. Essentially, the up-conversion ΔASE results provide evidence that shows up-conversion ASE can be realized by the orbit−orbit polarization interaction between light-emitting excitons. Moreover, up-conversion ASE proportionally increased as the pumping fluence increased, which shows that orbit–orbit polarization interaction can be gradually enhanced between coherent light-emitting excitons by increasing pumping density in the CsPbBr3 perovskite microrods. Substantially, our studies provide a fundamental understanding of the spin alignment between coherent light-emitting excitons towards developing spin-dependent nonlinear lasing actions in metal halide perovskites.

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Section: Introductionmentioning

confidence: 97%

Achieving Up-Conversion Amplified Spontaneous Emission through Spin Alignment between Coherent Light-Emitting Excitons in Perovskite Microstructures

Zhu

Xie

2022

Photonics

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High‐Reproducibility Layer‐by‐Layer Non‐Fullerene Organic Photovoltaics with 19.18% Efficiency Enabled by Vacuum‐Assisted Molecular Drift Treatment

Xie,

Zhou,

et al. 2024

Advanced Energy Materials

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The thin film deposition engineering of layer‐by‐layer (LbL) non‐fullerene organic solar cells (OSCs) favors vertical phase distributions of donor:acceptor (D:A), effectively boosting the power conversion efficiency (PCE). However, previous deposition strategies mainly aimed at optimizing the morphology of LbL films, and paid limited attention to the reproducibility of device performance. To achieve high device performance and maintain reproducibility, a strategy for hierarchical morphology manipulation in LbL OSCs is developed. A series of LbL devices are fabricated by introducing vacuum‐assisted molecular drift treatment (VMDT) to the donor or acceptor layer individually or simultaneously to elucidate the functionalities of this treatment. Essentially, the VMDT provides an extended drift driving force to manipulate the donor and acceptor molecules, resulting in a well‐defined vertical phase distribution and ordered molecular packing. These enhancements facilitate improvement in the D:A interface area and charge transport channel, ultimately contributing to impressive PCEs of 19.18% from 18.27% in the LbL devices. More importantly, using VMDT overcomes the notorious batch‐dependent and heat treatment degradation issues of OSCs, leading to excellent batch‐to‐batch reproducibility and enhanced stability of the devices. This reported method provides a promising strategy available for industrial and laboratory use to controllably manipulate the morphology of LbL OSCs.

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Semiconductor nanomaterial-based polarized light emission: From materials to light emitting diodes

Fang

Zhang

et al. 2023

Sci. China Mater.

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The overall optical efficiency of backlight-based liquid crystal displays (LCDs) is less than 5% due to the loss of backlight source by polarizers, color filter, liquid crystal layer and so on. Self-emissive light emitting diodes (LEDs) have been undergoing huge development due to their substantial market potentials to meet the demand of future display. More importantly, the polarized LEDs could enhance the energy utilization efficiency by avoiding light loss caused by polarizers. Therefore, it is desirable to look for effective methods to assemble high-quality anisotropic nanomaterial films so as to fabricate polarized LEDs with high degree of polarization and external quantum efficiency. Here, the photoelectrical properties of some semiconductor nanomaterials and their potential applications for polarized LEDs are introduced. The research progress in the field of polarized light emission from materials to films and then to LEDs is reviewed. Mechanisms of polarized emission, and different assembly strategies for polarized light emitting films and LEDs are also summarized and compared. Finally, several current challenges are discussed, and perspectives on future potential commercial application of polarized LEDs are offered. We hope this review will provide a valuable summary on current status and stimulate some new insightful ideas for future development of polarized LEDs.

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Packing-Shape Effects of Optical Properties in Amplified Spontaneous Emission through Dynamics of Orbit–Orbit Polarization Interaction in Hybrid Perovskite Quantum Dots Based on Self-Assembly

Cited by 3 publications

References 57 publications

Achieving Up-Conversion Amplified Spontaneous Emission through Spin Alignment between Coherent Light-Emitting Excitons in Perovskite Microstructures

Achieving Up-Conversion Amplified Spontaneous Emission through Spin Alignment between Coherent Light-Emitting Excitons in Perovskite Microstructures

High‐Reproducibility Layer‐by‐Layer Non‐Fullerene Organic Photovoltaics with 19.18% Efficiency Enabled by Vacuum‐Assisted Molecular Drift Treatment

Semiconductor nanomaterial-based polarized light emission: From materials to light emitting diodes

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