TY - JOUR
T1 - Controlled Synthesis of Terbium-Doped Colloidal Gd2O2S Nanoplatelets Enables High-Performance X-ray Scintillators
AU - Yorov, Khursand E.
AU - Nematulloev, Saidkhodzha
AU - Saidzhonov, Bedil M.
AU - Skorotetcky, Maxim S.
AU - Karluk, Azimet A.
AU - Hasanov, Bashir E.
AU - Mir, Wasim J.
AU - Sheikh, Tariq
AU - Gutiérrez-Arzaluz, Luis
AU - Phielepeit, Maximilian Emanuel Maria
AU - Ashraf, Nawal
AU - Blick, Robert H.
AU - Mohammed, Omar F.
AU - Bayindir, Mehmet
AU - Bakr, Osman M.
N1 - Publisher Copyright:
© 2024 American Chemical Society.
PY - 2024/8/6
Y1 - 2024/8/6
N2 - Terbium-doped gadolinium oxysulfide (Gd2O2S:Tb3+), commonly referred to as Gadox, is a widely used scintillator material due to its exceptional X-ray attenuation efficiency and high light yield. However, Gadox-based scintillators suffer from low X-ray spatial resolution due to their large particle size, which causes significant light scattering. To address this limitation, we report the synthesis of terbium-doped colloidal Gadox nanoplatelets (NPLs) with near-unity photoluminescence quantum yield (PLQY) and high radioluminescence light yield (LY). In particular, our investigation reveals a strong correlation between PLQY, LY, particle size, and Tb3+concentration. Our synthetic approach allows precise control over the lateral size and thickness of the Gadox NPLs, resulting in a LY of 50,000 photons/MeV. Flexible scintillating screens fabricated with the solution-processable Gadox NPLs exhibited a 20 lp/mm X-ray spatial resolution, surpassing commercial Gadox scintillators. These high-performance and flexible Gadox NPL-based scintillators enable enhanced X-ray imaging capabilities in medicine and security. Our work provides a framework for designing nanomaterial scintillators with superior spatial resolution and efficiency through precise control of dimensions and dopant concentration.
AB - Terbium-doped gadolinium oxysulfide (Gd2O2S:Tb3+), commonly referred to as Gadox, is a widely used scintillator material due to its exceptional X-ray attenuation efficiency and high light yield. However, Gadox-based scintillators suffer from low X-ray spatial resolution due to their large particle size, which causes significant light scattering. To address this limitation, we report the synthesis of terbium-doped colloidal Gadox nanoplatelets (NPLs) with near-unity photoluminescence quantum yield (PLQY) and high radioluminescence light yield (LY). In particular, our investigation reveals a strong correlation between PLQY, LY, particle size, and Tb3+concentration. Our synthetic approach allows precise control over the lateral size and thickness of the Gadox NPLs, resulting in a LY of 50,000 photons/MeV. Flexible scintillating screens fabricated with the solution-processable Gadox NPLs exhibited a 20 lp/mm X-ray spatial resolution, surpassing commercial Gadox scintillators. These high-performance and flexible Gadox NPL-based scintillators enable enhanced X-ray imaging capabilities in medicine and security. Our work provides a framework for designing nanomaterial scintillators with superior spatial resolution and efficiency through precise control of dimensions and dopant concentration.
KW - colloidal nanocrystals
KW - nanoplatelets
KW - phosphors
KW - terbium-doped rare-earth oxysulfides
KW - X-ray scintillators
UR - http://www.scopus.com/inward/record.url?scp=85197470425&partnerID=8YFLogxK
U2 - 10.1021/acsnano.4c01652
DO - 10.1021/acsnano.4c01652
M3 - Article
C2 - 38951541
AN - SCOPUS:85197470425
SN - 1936-0851
VL - 18
SP - 20111
EP - 20122
JO - ACS Nano
JF - ACS Nano
IS - 31
ER -