Elucidating the phase transitions and temperature-dependent photoluminescence of MAPbBr<sub>3</sub> single crystal

Chen, Cheng; Hu, Xiangmin; Lu, Wengao; Chang, Shuai; Shi, Lei; Li, Liang; Zhong, Haizheng; Han, Junbo

doi:10.1088/1361-6463/aaa0ed

Cited by 60 publications

(97 citation statements)

References 45 publications

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“…The phase transition for MAPbBr 3 crystal occurs near 160 K which is also not the origin for a sharp decrease in rise time. [ 37–39 ] Combining the observation of voltage instability during detector operation (Figure 2 and Figure S1, Supporting Information) and the large temperature dependent rise time changes in Figure 3, we attribute the slow detector rise time to the ion migration induced charge trapping, which is greatly suppressed once the temperature is lowered.…”

Section: Resultsmentioning

confidence: 74%

Methylammonium Lead Tribromide Single Crystal Detectors towards Robust Gamma‐Ray Photon Sensing

Tisdale

Yoho

Tsai

et al. 2020

Advanced Optical Materials

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photo voltaics, perovskite solar cells have already exceeded 23% in power conversion efficiency in a short development period. [1][2][3][4] OMHPs have also become popular in many other optoelectronic applications, such as light-emitting diodes, [5,6] photodetectors, [7,8] and lasing applications. [9] Properties such as tunable band gaps, [10,11] low trap state densities, [12] and long carrier diffusion lengths make OMHPs a desirable material for a wide range of optoelectronic applications, as well as being a focus for other semiconducting device applications. [13,14] These fascinating optoelectronic properties have recently sparked a new interest for applications of OMHPs for high-energy radiation detectors, which are considered as a critical technology in many fields, including nuclear safeguards, nuclear forensics, and astrophysics. Notably, current solid-state detector technologies using classical semiconductors have many challenges that must be overcome for wide spread development. For example, Cadmium Zinc Telluride (CZT) is a commercial γ-ray detection semiconductor achieving reasonable resolution (≈2% at 662 keV) at room temperature. However, the complicated and costly high-quality crystal growth for this semiconductor fabrication prohibits its broad adaptation. Another example of a more cost-effective semiconductor is high purity Germanium, (HPGe) which achieves an impressive resolution, (≈0.2% at 662 keV) albeit under operation at liquid nitrogen temperatures. [15] Thus, achieving cost efficient, robust high resolution detection at ambient conditions has been a long-time aim for semiconductor γ-ray detectors. In this arena, lead-halide based perovskites have been proposed as a new generation semiconductors in γ -spectroscopy for its low-cost solution process and simple crystal growth for room temperature detectors. [16][17][18] The incorporation of high-Z elements (i.e., Pb) underscores the opportunity for enhanced photoelectric interaction probability. Large band gaps and high resistivities are also essential for highly sensitive operation in the resistive mode. [19] Moreover, the long carrier lifetime and decent ambipolar mobility give great potential for single photon counting and pulse mode radiation sensing. [15] Previous reports have shown promising proof-of-principle results for the application of perovskites as ionizing radiation In recent years, hybrid perovskite single crystalline solid-state detectors have shown promise in γ-ray spectroscopy. Here, the γ-ray photon induced electrical pulses are investigated, which are produced by perovskite solid-state detectors made with the commonly used methylammonium lead tribromide crystals with chlorine incorporation. Under low electric field detector operation, slow pulses generated by γ-rays with average rise times of 65 µs are observed, which decreases to 20 µs when a higher electrical field of 500 V cm −1 is applied. However, the baseline becomes noisy quickly, which prevents collection of clean pulses for spectra construction. Further, by systematic...

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Section: Resultsmentioning

confidence: 74%

Methylammonium Lead Tribromide Single Crystal Detectors towards Robust Gamma‐Ray Photon Sensing

Tisdale

Yoho

Tsai

et al. 2020

Advanced Optical Materials

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“…The perovskite structural phase transitions under multiple temperature points need to be considered as they may alter the electronic band structure, in turn manifested as distinguished carrier dynamics and light emission properties of perovskite . Previous works have shown obvious double emission peaks due to the coexistence of orthorhombic and tetragonal phase for MAPbBr 3 and MAPbI 3– x Cl x NCs at low temperature of 160 K . The observed structural phase transition is not abrupt but instead features as a rather large phase‐coexistence region spanning tens of degrees (the width of the temperature range is depended on the details of the morphology of material).…”

Section: Carrier Dynamics In Metal Halide Perovskite Lasersmentioning

confidence: 99%

Recent Progress in Metal Halide Perovskite Micro‐ and Nanolasers

Wei

Liang

et al. 2019

Advanced Optical Materials

109

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Lead halide perovskites are considered as very promising photovoltaic materials due to their tunable direct bandgaps, large absorption coefficients, long carrier diffusion lengths, and ultralow trap state densities, etc. With these unique properties, the lead halide perovskites have also demonstrated great potential for use as semiconductor gain materials. In this review, a snapshot on the recent advances of lead halide perovskite micro‐ and nanolasers is given. The dependence of lasing performance on the perovskite dimensionality, crystal size, and operation temperature is systematically discussed. Furthermore, the development of continuous wave (cw) pumped perovskite lasers and lead‐free perovskite lasers is also summarized. In the final section, the challenges and future prospects of metal halide perovskite lasers are provided. These pieces of knowledge would help advancing the development of perovskite on‐chip coherent light sources.

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“…The exchange integral J b depends on the exciton Bohr radius and Kane energy (E P S ), while α, β and γ depend on the strength of the spin-orbit coupling and the crystal field (see detailed discussion in supplementary information). From our magneto-optical measurements, we can extract the exciton Bohr radius (3.8 nm), the effective mass (µ = 0.185) and the dielectric constant ( r = 13.1) which lies between the accepted high (5.6-6.7) [56][57][58] and low frequency (25)(26)(27)(28)(29)(30)(31)(32)(33)(34)(35)(36)(37)(38) 58,59 values. Such a discrepancy is typical for materials with smaller exciton radii.…”

Section: Introductionmentioning

confidence: 99%

Giant Fine Structure Splitting of the Bright Exciton in a Bulk MAPbBr₃ Single Crystal

et al. 2019

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Exciton fine structure splitting in semiconductors reflects the underlying symmetry of the crystal and quantum confinement. Since the latter factor strongly enhances the exchange interaction, most work has focused on nanostructures. Here, we report on the first observation of the bright exciton fine structure splitting in a bulk semiconductor crystal, where the impact of quantum confinement can be specifically excluded, giving access to the intrinsic properties of the material. Detailed investigation of the exciton photoluminescence and reflection spectra of a bulk methylammonium lead tribromide single crystal reveals a zero magnetic field split-ting as large as ∼ 200µ eV. This result provides an important starting point for the discussion of the origin of the large bright exciton fine structure observed in perovskite nanocrystals.In an ideally pure semiconductor, the lowest energy electronic excitation is a bound electronhole pair (exciton). The exchange interaction between electron and the hole spins lifts the degeneracy between dark singlet and bright multiplet excitonic states producing a fine structure. The physics of the fine structure splitting (FSS) has been the subject of intense in-1 arXiv:1909.06054v1 [cond-mat.mes-hall]

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Elucidating the phase transitions and temperature-dependent photoluminescence of MAPbBr₃ single crystal

Cited by 60 publications

References 45 publications

Methylammonium Lead Tribromide Single Crystal Detectors towards Robust Gamma‐Ray Photon Sensing

Methylammonium Lead Tribromide Single Crystal Detectors towards Robust Gamma‐Ray Photon Sensing

Recent Progress in Metal Halide Perovskite Micro‐ and Nanolasers

Giant Fine Structure Splitting of the Bright Exciton in a Bulk MAPbBr₃ Single Crystal

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Elucidating the phase transitions and temperature-dependent photoluminescence of MAPbBr3 single crystal

Cited by 60 publications

References 45 publications

Methylammonium Lead Tribromide Single Crystal Detectors towards Robust Gamma‐Ray Photon Sensing

Methylammonium Lead Tribromide Single Crystal Detectors towards Robust Gamma‐Ray Photon Sensing

Recent Progress in Metal Halide Perovskite Micro‐ and Nanolasers

Giant Fine Structure Splitting of the Bright Exciton in a Bulk MAPbBr3 Single Crystal

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Product

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Elucidating the phase transitions and temperature-dependent photoluminescence of MAPbBr₃ single crystal

Giant Fine Structure Splitting of the Bright Exciton in a Bulk MAPbBr₃ Single Crystal