Crystallization of CsPbBr3 single crystals in water for X-ray detection

Abstract

Metal halide perovskites have fascinated the research community over the past decade, and demonstrated unprecedented success in optoelectronics. In particular, perovskite single crystals have emerged as promising candidates for ionization radiation detection, due to the excellent opto-electronic properties. However, most of the reported crystals are grown in organic solvents and require high temperature. In this work, we develop a low-temperature crystallization strategy to grow CsPbBr3 perovskite single crystals in water. Then, we carefully investigate the structure and optoelectronic properties of the crystals obtained, and compare them with CsPbBr3 crystals grown in dimethyl sulfoxide. Interestingly, the water grown crystals exhibit a distinct crystal habit, superior charge transport properties and better stability in air. We also fabricate X-ray detectors based on the CsPbBr3 crystals, and systematically characterize their device performance. The crystals grown in water demonstrate great potential for X-ray imaging with enhanced performance metrics.

Design of two-dimensional halide perovskite composites for optoelectronic applications and beyond

“…The record of photoluminescence and electroluminescence efficiency 216 of 2D perovskites has continuously been broken in display, encryption, biological imaging and X-Ray detection. 52,217,218 For instance, Chandra et al 219 reported the use of specific antibody attached water-resistant CsPbBr 3 nanocrystals in different dimensions for two-photon imaging of breast cancer cells in the near IR region, superior to conventional organic fluorescence labels.…”

Reproducible X‐ray Imaging with a Perovskite Nanocrystal Scintillator Embedded in a Transparent Amorphous Network Structure

“…The application of a scintillator for X-ray detection and imaging realizes an industrially feasible component for bioimaging, [1,2] radiotherapy, [3] and non-destructive testing. [4,5] Recently, all-inorganic CsPbX 3 (X = Cl, Br, I) perovskite scintillators have been explored due to their large X-ray absorption efficiency, intense radio-luminescence (RL), low X-ray detection limit and fast light decay, [6][7][8][9][10][11] which make them highly competitive with the commercial counterparts, e.g., CsI:Tl [12] and Bi 4 Ge 3 O 12 (BGO). [13] To date, impressive progress has been achieved in the CsPbBr 3 -perovskitebased ultrasensitive X-ray detectors and low-dose X-ray radiography.…”

Limits to Electrical Mobility in Lead-Halide Perovskite Semiconductors

“…In particular, single-junction solar cells based on these materials have shown rapid growth in solar-to-electrical power conversion efficiency (PCE) from 3.8% to over 25%, whereas perovskite–silicon tandem solar cells have reached efficiencies of over 29%. 1 , 13 MHP single crystals have attracted intense interest because of their potential in fabricating photodetectors, 14 X-ray scintillators and detectors, 15 − 17 as well as applications in photocatalysis and photoelectrochemical fields. 18 On the other hand, the cutting-edge photovoltaic devices have been mostly developed on a platform of polycrystalline thin films because of their ease of fabrication.…”