scholarly journals Inch-Sized Thin Metal Halide Perovskite Single-Crystal Wafers for Sensitive X-Ray Detection

2022 ◽  
Vol 9 ◽  
Author(s):  
Anbo Feng ◽  
Shengdan Xie ◽  
Xiuwei Fu ◽  
Zhaolai Chen ◽  
Wei Zhu
Keyword(s):  
Single Crystal ◽  
Single Crystals ◽  
Indium Tin Oxide ◽  
High Sensitivity ◽  
Metal Halide ◽  
Large Area ◽  
X Ray ◽  
Metal Halide Perovskite ◽  
Imaging Application ◽  
Halide Perovskite

Metal halide perovskite single crystals are a promising candidate for X-ray detection due to their large atomic number and high carrier mobility and lifetime. However, it is still challenging to grow large-area and thin single crystals directly onto substrates to meet real-world applications. In this work, millimeter-thick and inch-sized methylammonium lead tribromide (MAPbBr3) single-crystal wafers are grown directly on indium tin oxide (ITO) substrates through controlling the distance between solution surface and substrates. The single-crystal wafers are polished and treated with O3 to achieve smooth surface, lower trap density, and better electrical properties. X-ray detectors with a high sensitivity of 632 µC Gyair−1 cm−2 under –5 V and 525 µC Gyair−1 cm−2 under –1 V bias can be achieved. This work provides an effective way to fabricate substrate-integrated, large-area, and thickness-controlled perovskite single-crystal X-ray detectors, which is instructive for developing imaging application based on perovskite single crystals.

scholarly journals Tailoring the electron and hole dimensionality to achieve efficient and stable metal halide perovskite scintillators

Nanophotonics ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Zhifang Tan ◽  
Jincong Pang ◽  
Guangda Niu ◽  
Jun-Hui Yuan ◽  
Kan-Hao Xue ◽  
...  
Keyword(s):  
Water Solubility ◽  
Radiation Stability ◽  
Metal Halide ◽  
Lead Free ◽  
X Ray ◽  
Metal Halide Perovskite ◽  
Bonding Interaction ◽  
Halide Perovskites ◽  
Halide Perovskite ◽  
Low X

Abstract Metal halide perovskites have recently been reported as excellent scintillators for X-ray detection. However, perovskite based scintillators are susceptible to moisture and oxygen atmosphere, such as the water solubility of CsPbBr3, and oxidation vulnerability of Sn2+, Cu+. The traditional metal halide scintillators (NaI: Tl, LaBr3, etc.) are also severely restricted by their high hygroscopicity. Here we report a new kind of lead free perovskite with excellent water and radiation stability, Rb2Sn1-x Te x Cl6. The equivalent doping of Te could break the in-phase bonding interaction between neighboring octahedra in Rb2SnCl6, and thus decrease the electron and hole dimensionality. The optimized Te content of 5% resulted in high photoluminescence quantum yield of 92.4%, and low X-ray detection limit of 0.7 µGyair s−1. The photoluminescence and radioluminescence could be maintained without any loss when immersing in water or after 480,000 Gy radiations, outperforming previous perovskite and traditional metal halides scintillators.

Impedance Spectroscopy for Metal Halide Perovskite Single Crystals: Recent Advances, Challenges, and Solutions

2021 ◽  
Vol 6 (9) ◽  
pp. 3275-3286
Author(s):  
Mohammad Adil Afroz ◽  
Clara A. Aranda ◽  
Naveen Kumar Tailor ◽  
Yukta ◽  
Pankaj Yadav ◽  
...  
Keyword(s):  
Impedance Spectroscopy ◽  
Single Crystals ◽  
Metal Halide ◽  
Recent Advances ◽  
Metal Halide Perovskite ◽  
Halide Perovskite

scholarly journals Understanding Dark Current-Voltage Characteristics in Metal-Halide Perovskite Single Crystals

2021 ◽  
Vol 15 (1) ◽  
Author(s):  
Elisabeth A. Duijnstee ◽  
Vincent M. Le Corre ◽  
Michael B. Johnston ◽  
L. Jan Anton Koster ◽  
Jongchul Lim ◽  
...  
Keyword(s):  
Single Crystals ◽  
Dark Current ◽  
Metal Halide ◽  
Metal Halide Perovskite ◽  
Current Voltage ◽  
Current Voltage Characteristics ◽  
Halide Perovskite

Metal halide perovskite for X-ray and gamma-ray detection

2020 ◽  
Author(s):  
Jingjing Zhao ◽  
Yuanxiang Feng ◽  
Lei Pan ◽  
Lei R. Cao ◽  
Jinsong Huang
Keyword(s):  
Gamma Ray ◽  
Metal Halide ◽  
X Ray ◽  
Metal Halide Perovskite ◽  
Halide Perovskite

scholarly journals Robot-Accelerated Perovskite Investigation and Discovery (RAPID): 1. Inverse Temperature Crystallization

2019 ◽  
Author(s):  
Zhi Li ◽  
Mansoor Ani Najeeb ◽  
Liana Alves ◽  
Alyssa Sherman ◽  
Peter Cruz Parrilla ◽  
...  
Keyword(s):  
Machine Learning ◽  
Single Crystal ◽  
High Throughput ◽  
Metal Halide ◽  
Crystal Formation ◽  
Inverse Temperature ◽  
High Quality ◽  
Metal Halide Perovskite ◽  
Halide Perovskite ◽  
Temperature Crystallization

Metal halide perovskites are a promising class of materials for next-generation photovoltaic and optoelectronic devices. The discovery and full characterization of new perovskite-derived materials are limited by the difficulty of growing high quality crystals needed for single-crystal X-ray diffraction studies. We present the first automated, high-throughput approach for metal halide perovskite single crystal discovery based on inverse temperature crystallization (ITC) as a means to rapidly identify and optimize synthesis conditions for the formation of high quality single crystals. Using this automated approach, a total of 1928 metal halide perovskite synthesis reactions were conducted using six organic ammonium cations (methylammonium, ethylammonium, n-butylammonium, formamidinium, guanidinium, and acetamidinium), increasing the number of metal halide perovskite materials accessible by ITC syntheses by three and resulting in the formation of a new phase, [C<sub>2</sub>H<sub>7</sub>N<sub>2</sub>][PbI<sub>3</sub>]. This comprehensive dataset allows for a statistical quantification of the total experimental space and of the likelihood of large single crystal formation. Moreover, this dataset enables the construction and evaluation of machine learning models for predicting crystal formation conditions. This work is a proof-of-concept that combining high throughput experimentation and machine learning accelerates and enhances the study of metal halide perovskite crystallization. This approach is designed to be generalizable to different synthetic routes for the acceleration of materials discovery.

scholarly journals Shape Control of Metal Halide Perovskite Single Crystals: From Bulk to Nanoscale

2020 ◽  
Vol 32 (18) ◽  
pp. 7602-7617 ◽  
Author(s):  
Anbo Feng ◽  
Xiaomei Jiang ◽  
Xiaoyu Zhang ◽  
Xiaopeng Zheng ◽  
Weitao Zheng ◽  
...  
Keyword(s):  
Single Crystals ◽  
Shape Control ◽  
Metal Halide ◽  
Metal Halide Perovskite ◽  
Halide Perovskite

scholarly journals Resolving spatial and energetic distributions of trap states in metal halide perovskite solar cells

Science ◽  
2020 ◽  
Vol 367 (6484) ◽  
pp. 1352-1358 ◽  
Author(s):  
Zhenyi Ni ◽  
Chunxiong Bao ◽  
Ye Liu ◽  
Qi Jiang ◽  
Wu-Qiang Wu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Single Crystals ◽  
Surface Passivation ◽  
Perovskite Solar Cells ◽  
Hole Transport ◽  
Metal Halide ◽  
Trap States ◽  
Deep Traps ◽  
Metal Halide Perovskite ◽  
Halide Perovskite

We report the profiling of spatial and energetic distributions of trap states in metal halide perovskite single-crystalline and polycrystalline solar cells. The trap densities in single crystals varied by five orders of magnitude, with a lowest value of 2 × 1011 per cubic centimeter and most of the deep traps located at crystal surfaces. The charge trap densities of all depths of the interfaces of the polycrystalline films were one to two orders of magnitude greater than that of the film interior, and the trap density at the film interior was still two to three orders of magnitude greater than that in high-quality single crystals. Suprisingly, after surface passivation, most deep traps were detected near the interface of perovskites and hole transport layers, where a large density of nanocrystals were embedded, limiting the efficiency of solar cells.

High Performance X-ray to Current Converters Fabricated Via Sintering or Melting of a Metal-halide Perovskite

2019 ◽  
Author(s):  
Gebhard J. Matt ◽  
Ievgen Levchuk ◽  
Judith Knüttel ◽  
Shreetu Shrestha ◽  
Johannes Dallmann ◽  
...  
Keyword(s):  
High Performance ◽  
Metal Halide ◽  
X Ray ◽  
Metal Halide Perovskite ◽  
Halide Perovskite
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