Centimeter‐Sized Single Crystal of Two‐Dimensional Halide Perovskites Incorporating Straight‐Chain Symmetric Diammonium Ion for X‐Ray Detection

Shen, Yue; Liu, Yucheng; Ye, Haochen; Zheng, Yiting; Wei, Qi; Xia, Yingdong; Chen, Yonghua; Zhao, Kui; Huang, Wei; Liu, Shengzhong

doi:10.1002/anie.202004160

Cited by 172 publications

(166 citation statements)

References 52 publications

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“…The detector has a higher charge collection efficiency close to the crystal surface owing to a higher electric field strength. [30,31] The X-ray response of the TMCM-CdCl 3 crystal based device was recorded by modified DX-2700 X-ray diffractometer under a tungsten anode X-ray source at the continuous 40 kV acceleration voltage. The dose rates can be regulated by changing the X-ray tube current from 40 to 5 mA and number of the aluminum attenuators.…”

Section: X-ray Detectionmentioning

confidence: 99%

Centimeter‐Sized Molecular Perovskite Crystal for Efficient X‐Ray Detection

Chen

Song

et al. 2021

Adv Funct Materials

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Molecular perovskites have demonstrated great potential for ferroelectrics and nonlinear optics; however, their charge transport properties for optoelectronics have rarely been explored. Here, understanding of charge transport behavior of molecular perovskite under X-ray excitation based on centimeter-scale TMCM-CdCl 3 (TMCM + , trimethylchloromethyl ammonium) single crystal is demonstrated. The crystal is fabricated from an aqueous solution and exhibits a large bandgap of 5.51 eV, with the valence band maximum mainly dominated by the Cl-p/Cd-d states and the conduction band minimum primarily by Cd-s/Cl-p states. Charge mobility exceeding 40 cm 2 V −1 s −1 and mobility-lifetime (µτ) product on the order of 10 −4 cm 2 V −1 for the crystal are observed. These excellent optoelectronic properties translate to an efficient photoresponse under X-ray excitation, with the sensitivity reaching 128.9 ± 4.64 µC Gy air −1 cm −2 [fivefold higher than that of the commercialized amorphous selenium (α-Se)] and a low detection limit of 1.06 µC Gy air −1 s −1 (10 V bias). This work pioneers a superior metal-based molecular perovskite single-crystal based paradigm for optoelectronic investigation, which may lead to the discovery of a new generation of X-ray detection and imaging materials.

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Section: X-ray Detectionmentioning

confidence: 99%

Centimeter‐Sized Molecular Perovskite Crystal for Efficient X‐Ray Detection

Chen

Song

et al. 2021

Adv Funct Materials

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“…[28][29][30] The RP, DJ, and Aurivillius families adopt the general formulas A 0 2 A nÀ1 B n X 3nþ1 , A 0 0 A nÀ1 B n X 3nþ1 , and (Bi 2 O 2 )(A nÀ1 B n X 3nþ1 ), respectively, where A denotes a univalent organic cation: formamidinium (FA þ ) or methylammonium (MA þ ), A 0 is a large univalent organic cation spacer such as butylammonium (BA þ ), [14,31] or phenylethylammonium (PEA þ ), [6,32,33] etc., A 0 0 is a divalent organic cation spacer such as 3-(aminomethyl)piperidinium (3AMP 2þ ) [34,35] or 1,4-butanediamine (BDA 2þ ). [23,25,36] The ACI perovskites, a new type of 2D halide perovskites that feature two different ACIs in the interlayer space, was first introduced by Soe et al [28] The ACI families can be described by the formula of (GA)MA n Pb n I 3nþ1 (GA ¼ guanidinium, MA ¼ methylammonium). This unique structure type blends the structural features of the DJ perovskites with the chemical formula of the RP perovskites.…”

Section: Introductionmentioning

confidence: 99%

Stable 2D Alternating Cation Perovskite Solar Cells with Power Conversion Efficiency >19% via Solvent Engineering

Yang

Liu

et al. 2021

Solar RRL

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Two‐dimensional alternating cation (ACI)‐type perovskites self‐assemble in solution to form highly ordered periodic stacks with unique physical properties and improved optoelectronic devices. Tailoring composition and distribution of quantum wells (QWs) is of vital importance for the optoelectronic properties and stability, which, however, have been less reported in contrast to their Ruddlesden–Popper (RP) and Dion–Jacobson (DJ) counterparts. Herein, crystallization control via solvent engineering for ACI perovskite (GA)MA n Pb n I3n+1 ( = 5, GA = guanidinium, MA = methylammonium) that enables preferential QW distribution within the film and augments the crystallinity and smoothness of the films is proposed. It is found that such morphological improvements are further reflected in the optoelectronic properties, including enhanced charge carrier transport/extraction and suppressed nonradiative charge recombination. Thus, efficient and stable ACI perovskite solar cells with a power conversion efficiency (PCE) of 19.18%, standing the highest among all reported RP, DJ, and ACI ( ≤ 5) solar cells, are realized. Meanwhile, the device exhibits superior reproducibility and environmental stability. These findings highlight the importance of crystallization control and pave the way for the realization of high‐performance 2D perovskite solar cells.

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“…The value was 9-fold higher than the dominant commercial X-ray detector a-Se (20 μC Gy air −1 cm −2 ). The lowest detection limit of (BDA)PbI 4 was 1.58–3.13 µGy air ·s −1 at 10–50 V voltage bias, which is lower than the regular medical diagnostics and makes 2D (BDA)PbI 4 a candidate material for soft X-ray detector [ 54 ].…”

Section: X-ray Optoelectronic Propertiesmentioning

confidence: 99%

2D Organic–Inorganic Hybrid Perovskite Quantum Well Materials and Their Dramatical X-ray Optoelectronic Properties

Chen

Xue

2021

Materials

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Two-dimensional organic–inorganic hybrid perovskites (2D OIHPs) have attracted extensive attention in the field of X-ray detection due to their excellent stability compared to traditional three-dimensional OIHPs and the strong optoelectronic response to X-ray along the quantum wells. In this review, the nucleation and growth process as well as intermolecular forces for controlling out-of-plane growth are summarized along with the oriented growth mechanism. The optoelectronic properties in 2D OIHP under irradiation of X-ray are also discussed. Finally, conclusions and outlook for orientation 2D OIHP quantum wells and their challenges in application of direct X-ray detection are given. This review will provide a basic understanding on the strategy of designing 2D OIHP thick films as promising X-ray photoconductors, which may inspire the development of next-generation X-ray detectors.

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Centimeter‐Sized Single Crystal of Two‐Dimensional Halide Perovskites Incorporating Straight‐Chain Symmetric Diammonium Ion for X‐Ray Detection

Cited by 172 publications

References 52 publications

Centimeter‐Sized Molecular Perovskite Crystal for Efficient X‐Ray Detection

Centimeter‐Sized Molecular Perovskite Crystal for Efficient X‐Ray Detection

Stable 2D Alternating Cation Perovskite Solar Cells with Power Conversion Efficiency >19% via Solvent Engineering

2D Organic–Inorganic Hybrid Perovskite Quantum Well Materials and Their Dramatical X-ray Optoelectronic Properties

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