In:
Journal of Materials Chemistry C, Royal Society of Chemistry (RSC), Vol. 10, No. 17 ( 2022), p. 6837-6845
Abstract:
Single crystalline perovskites with long carrier lifetime, large carrier mobility and high atomic number emerge as highly sensitive X-ray detection materials. Precisely controlling the growth of high-quality perovskite single crystals (SCs) is still a big challenge to date. Herein, a simple, convenient and highly reproducible method, low-temperature controllable metastable crystallization (LCMC), is shown to prepare high-quality CH 3 NH 3 PbBr 3 (MAPbBr 3 ) SCs at a low temperature of 45 °C. A surprisingly reduced full width at half-maximum of the (001) and (002) planes and hence a higher crystalline quality was achieved for the LCMC-MAPbBr 3 SCs as compared to the inverse temperature crystallization (ITC) SCs. Moreover, the LCMC-MAPbBr 3 SCs possess longer carrier lifetime increased by nearly 248% to 1126 ns, larger carrier mobility increased by 146% to 87.8 cm 2 V −1 s −1 , and significantly lower trap density of 2.1 × 10 9 cm −3 (reduced by around 89%) compared with the ITC samples. Based on the high-quality SCs, the as-developed X-ray detector demonstrates a high sensitivity of 2975.7 μC Gy air −1 cm −2 and a lowest detectable dose rate of 0.48 μGy air s −1 . Evidently, this work may pave the way for controlling the crystallization process of perovskites, which is essential for enhancing the further application of perovskite SCs.
Type of Medium:
Online Resource
ISSN:
2050-7526
,
2050-7534
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2022
detail.hit.zdb_id:
2702245-6
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