All‐Perovskite Integrated X‐Ray Detector with Ultrahigh Sensitivity

Li, Xiaoming; Meng, Cuifang; Huang, Bo; Yang, Dandan; Xu, Xiaobao; Zeng, Haibo

doi:10.1002/adom.202000273

Cited by 75 publications

(75 citation statements)

References 35 publications

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“…The small redshift compared to the PL peak is in accord with other halides. 19,40 It is worth noting Mn 2+ PL is still weak in low doping concentration as shown in Fig. S8, but the RL intensity of Mn3% is much higher than that of pure Cs 3 Cu 2 I 5 .…”

Section: Main Textmentioning

confidence: 93%

“…Also, it is reported that taking full advantage of the direct and indirect conversion approaches can achieve better device performance. 4,40 Therefore, we should make a balance between scintillator lm thickness and X-ray absorption. With the increase of scintillator lm thickness, the output power showed a rst rising and then decline trend.…”

Section: Characterization Of Nuclear Batterymentioning

confidence: 99%

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Mn2+ Induced Significant Improvement and Robust Stability of Radioluminescence in Cs3Cu2I5 for High Performance Nuclear Battery

Zeng

Chen

et al. 2020

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Fluorescent type nuclear battery (NB) consisting of scintillator and photovoltaic device (PVD) enables semipermanent power source for both small and large devices working under harsh circumstances without instant energy supply. In spite of the progress of device structure design, the development of scintillators with high light yield (LY) and longer emission wavelength catering to PVDs is far behind. Here, a novel Cs3Cu2I5: Mn scintillator, which exhibits an ultrahigh LY of ~ 67000 ph/MeV at an emission wavelength of 564 nm is presented, and this is the highest value at such a long wavelength based on low cost precursors. Besides, doping and intrinsic features endow Cs3Cu2I5: Mn with robust thermal stability and irradiation hardness that 71% or > 90% of the initial radioluminescence (RL) intensity can be maintained in an ultra-broad temperature range of 77 K-433 K or after a total irradiation dose of 38.7 Gy at 333 K, respectively. These superiorities allow the fabrication of an efficient and stable NB, which showed an output improvement of 337% respect to that without scintillator. Luminescence mechanisms including self-trapped exciton, energy transfer, and impact excitation are proposed for the dramatic RL improvement. It is expected that such a new and robust scintillator will open a window for the fields of NBs and radiography.

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Section: Main Textmentioning

confidence: 93%

Section: Characterization Of Nuclear Batterymentioning

confidence: 99%

Mn2+ Induced Significant Improvement and Robust Stability of Radioluminescence in Cs3Cu2I5 for High Performance Nuclear Battery

Zeng

Chen

et al. 2020

Preprint

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“…In recent years, perovskite materials with excellent photoelectric properties have been proved to be potential scintillator materials. [ 124–128 ] In this chapter, we review perovskite and their applications in detectors and imaging from single crystals (SCs), 2D and nanocrystals (NCs)/quantum dots (QDs), and their characteristics are listed in Table 2 .…”

Section: Scintillator Materialsmentioning

confidence: 99%

“…To overcome this difficulty, Li et al. proposed a full perovskite high sensitivity integrated X‐ray detector through carrier management (as shown in Figure a), [ 125 ] which greatly improved the sensitivity of the X‐rays detector. They found that the efficient ultrafast exciton routing in CsPbBr 3 NCs resulted in larger stokes shift, which greatly enhance the quantum yield of PL (>50%) and luminescence efficiency (>threefold).…”

Section: Scintillator Materialsmentioning

confidence: 99%

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Halide Perovskite, a Potential Scintillator for X‐Ray Detection

et al. 2020

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the coincidence efficiency. This indicates that the solid angle controlled by the PET system and the efficiency of the intrinsic detector are greater. [11,12] More significantly, the Compton events in the pulse height spectrum are mainly caused by scattering in the scintillator. Therefore, these deficiencies can be avoided by lowering the threshold. However, the signal provided by Compton scattering quanta in adjacent crystals may be higher than the threshold, and thus may affect the position resolution and make it worse. In X-ray computed tomography (CT), the body is mainly irradiated continuously from multiple directions by fan-shaped X-rays, while attenuation profiles are recorded, and finally reconstructed from the cross-sectional view of the body. [13] This technology mainly uses complex scanning methods in the field of clinical practice. At present, the realized way of X-rays detector can be roughly divided into two types, direct and indirect. The former one directly absorbs incident X-rays, generates electronic signals through semiconductors or engenders chemical signals through thin films. [14-17] This method can directly convert X-rays into visible light without going through other processes. Therefore, an X-ray detector with a wide linear response range, fast pulse rise time, high-energy resolution, and spatial resolution can be obtained, which makes it copiously applied in X-ray detection. [18-21] However, X-ray detectors based on semiconductors face the challenges of high cost and low efficiency. In addition, although the film is cheap, it is difficult to apply in digital form, which may limit its further development. The latter one refers to the conversion of X-rays (in the highenergy radiation, in addition to X-rays, α, β, and γ rays are also included) into ultraviolet visible (UV) light through scintillators which can be further captured by optical devices. [22-24] It consists of a scintillator and an array photodiode (PD). In contrast, since the scintillator that converts X-rays indirectly is cheap, it is easier to implement in the industry than direct detectors, and has the characteristics of low cost and abundant options, stability, and flexible conversion rate. [25,26] At present, indirect X-ray detectors are widely used in ordinary flat panel X-ray detectors. Moreover, it can be flexibly combined with commercially mature sensor arrays (e.g., amorphous silicon PDs, thin film transistor arrays, photomultiplier tubes, complementary metal oxide semiconductors, silicon avalanche PDs, and X-ray imaging charge-coupled devices [CCD]), therefore, they have attracted more attention. Scintillator is a unique class of luminescent materials, which is extensively used in many fields such as nondestructive testing, medical imaging, space probes, etc. Compared with the disadvantages of traditional scintillator materials which have high cost, are fragile, have long response time and low spatial resolution disadvantages, metal halide perovskites are considered to be the most potential scintillator materials in ...

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