Controllable metastable growth of perovskite single crystals for highly sensitive X-ray detection
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, conveni...
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Veröffentlicht in: | Journal of materials chemistry. C, Materials for optical and electronic devices Materials for optical and electronic devices, 2022-05, Vol.1 (17), p.6837-6845 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | 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.
MAPbBr
3
single crystals (SCs) were obtained by a low-temperature controllable metastable crystallization method, which regulates the growth process to low temperature and ensures excellent optoelectronic properties of the as-prepared SCs. |
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ISSN: | 2050-7526 2050-7534 |
DOI: | 10.1039/d2tc00235c |