Related references
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Article
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Summary: Perovskite gain materials can sustain continuous-wave lasing at room temperature. However, electrical stimulation supplementing optical has reduced gain performance in the past. In this study, researchers found that the addition of an electric field can turn on/off the amplified spontaneous emission (ASE) in a CsPbBr3 perovskite light-emitting diode (LED), and a positive bias voltage leads to a reduction in the optical ASE threshold.
Article
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Dandan Hao et al.
Summary: Massive data processing with high efficiency and low power consumption is needed for the development of artificial intelligence and information technology. The current computing systems with separated memory and processor consume a large amount of energy and have a slow running speed during massive data processing. To address this issue, the brain-inspired neuromorphic computing system has been developed, which provides hardware support for emulating biological synaptic functions and achieving highly intensive data processing with low power consumption. The optoelectronic synaptic device (OSD), as a neuromorphic device, is considered an ideal replacement for the von Neumann-based computer due to its ultrafast signal transmission, large bandwidth, low energy consumption, and wireless communication. Metal halide perovskites (MHPs), with their unique optoelectronic properties, have gained increasing attention as effective photosensitive materials in OSDs. This review introduces the recent progress on MHPs-based OSDs (MHPs-OSDs), including the structures and properties of MHPs, and the architectures and performance characteristics of MHPs-OSDs. The applications of MHPs-OSDs are also presented. Finally, the outlook and opportunities of MHPs-OSDs are discussed.
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Summary: By modifying the interface molecules for CsPbI3 perovskite, the electron transfer barrier is reduced and the crystal quality is improved, resulting in a decrease of trap-assisted charge recombination and interfacial energetic loss. As a result, the devices achieve an impressive efficiency of 20.98% and a record-low V-OC deficit of 0.451 V.
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Summary: In recent years, two-dimensional metal halide perovskites have gained significant attention for radiation detection and imaging purposes due to their comparable efficiency to three-dimensional perovskites and superior stability. This review provides a comprehensive overview of the crystallographic structure, preparation methods, working principles, performance evaluation, and recent advances in two-dimensional perovskite x-ray detectors, while also highlighting the major obstacles that need to be overcome.
Article
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Summary: The study utilized atomic models including grain boundaries to analyze the distribution of rubidium cations in perovskite structures, which was thoroughly identified using synchrotron-based grazing-incidence X-ray diffraction. This research sheds light on the subtle changes in Rb+ concentration and their impact on electronic defects, ion migration, and phase stability.
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Summary: This article discusses the design of a multifunctional trap deactivating reagent that effectively eliminates deep level metallic lead traps in perovskite optoelectronics. It shows improved device performance and stability.
Article
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Article
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Jun Peng et al.
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Editorial Material
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Summary: In this study, a highly tunable enhancement and switching of nonlinear emission from metal halide perovskites were demonstrated using an asymmetrically biased metal-insulator-semiconductor structure. The enhancement of two-photon-pumped photoluminescence was achieved by electric-field-induced passivation/activation of Br vacancies, ranging from approximately 61.2-fold to 370.3-fold. Efficient modulation of two-photon-pumped lasing with a high on/off ratio of 67:1 was also demonstrated.
Article
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Summary: This review provides a comprehensive overview of recent advances in metal halide perovskites for image sensing applications, including performance parameters, device types, applications of different dimensional materials, preparation methods, single-pixel imaging, and strategies for color discrimination.
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