TY - JOUR
T1 - Deterministic Light Yield, Fast Scintillation, and Microcolumn Structures in Lead Halide Perovskite Nanocrystals
AU - Maddalena, Francesco
AU - Xie, Aozhen
AU - Chin, Xin Yu
AU - Begum, Raihana
AU - Witkowski, Marcin E.
AU - Makowski, Michal
AU - Mahler, Benoit
AU - Drozdowski, Winicjusz
AU - Springham, Stuart Victor
AU - Rawat, Rajdeep Singh
AU - Mathews, Nripan
AU - Dujardin, Christophe
AU - Birowosuto, Muhammad Danang
AU - Dang, Cuong
N1 - Publisher Copyright:
© 2021 American Chemical Society
PY - 2021/7/1
Y1 - 2021/7/1
N2 - Lead halide perovskite (LHP) nanocrystals (NCs) have recently attracted attention due to both their high quantum yield and their potential for X-ray imaging applications. In this paper, we investigated the scintillation properties of three different LHP NCs; CsPbBr3, FAPbBr3, and CsPbI3. The featured NCs exhibited high X-ray excited luminescence (XL) at cryogenic temperatures. While FAPbBr3and CsPbI3NCs display thermal quenching, CsPbBr3NCs show negative thermal quenching and high XL at high temperatures, with a light yield of 24,000 ± 2,100 photons/MeV at 300 K. The LHP NCs exhibit a small afterglow and low trap density and exhibit a very fast XL decay time, under 20 ns, faster than those of some currently used commercial scintillators. Overall, CsPbBr3NCs are the best performing materials investigated here, making them particularly attractive for fast-timing applications such as positron emission tomography or particle detectors in high-energy physics. In the end, we demonstrate the proof of concept for using a CsPbBr3NC matrix for imaging applications and the flexibility of NCs for developing microstructure scintillators.
AB - Lead halide perovskite (LHP) nanocrystals (NCs) have recently attracted attention due to both their high quantum yield and their potential for X-ray imaging applications. In this paper, we investigated the scintillation properties of three different LHP NCs; CsPbBr3, FAPbBr3, and CsPbI3. The featured NCs exhibited high X-ray excited luminescence (XL) at cryogenic temperatures. While FAPbBr3and CsPbI3NCs display thermal quenching, CsPbBr3NCs show negative thermal quenching and high XL at high temperatures, with a light yield of 24,000 ± 2,100 photons/MeV at 300 K. The LHP NCs exhibit a small afterglow and low trap density and exhibit a very fast XL decay time, under 20 ns, faster than those of some currently used commercial scintillators. Overall, CsPbBr3NCs are the best performing materials investigated here, making them particularly attractive for fast-timing applications such as positron emission tomography or particle detectors in high-energy physics. In the end, we demonstrate the proof of concept for using a CsPbBr3NC matrix for imaging applications and the flexibility of NCs for developing microstructure scintillators.
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U2 - 10.1021/acs.jpcc.1c03392
DO - 10.1021/acs.jpcc.1c03392
M3 - Article
AN - SCOPUS:85110504940
SN - 1932-7447
VL - 125
SP - 14082
EP - 14088
JO - Journal of Physical Chemistry C
JF - Journal of Physical Chemistry C
IS - 25
ER -