TY - JOUR
T1 - Plasmonically-Enhanced Radioluminescence Induced by Energy Transfer in Colloidal CsPbBr3 Nanocrystals via Hybridization of Silver Nanoparticles
AU - Jeon, Gi Wan
AU - Cho, Sangeun
AU - Park, Sunjung
AU - Kim, Do Wan
AU - Jana, Atanu
AU - Park, Dong Hyuk
AU - Kwak, Jungwon
AU - Im, Hyunsik
AU - Jang, Jae Won
N1 - Publisher Copyright:
© 2023 Wiley-VCH GmbH.
PY - 2023/9/4
Y1 - 2023/9/4
N2 - Nanocrystals of CsPbBr3, a colloidal perovskite, are hybridized with silver nanoparticles (Ag NPs) and organic molecules (2,5-diphenyloxazole, PPO) to improve X-ray radioluminescence (RL). It is known that charge transfer from the PPO molecules to the CsPbBr3 nanocrystals enhances the RL efficiency of the CsPbBr3 nanocrystals. In this study, Ag NPs are introduced to further enhance the RL efficiency. The plasmonic process of the Ag NPs is activated by the PPO molecules, which contain X-ray-induced high-energy charges. Subsequently, electric fields induced by the plasmonic process of the Ag NPs accelerate the charge transfer from the PPO molecules to the CsPbBr3 nanocrystals. The plasmonic effect of the Ag NPs is demonstrated by the full-width half maximum (FWHM): the photoluminescence FWHM of the hybridized CsPbBr3 nanocrystals is reduced, whereas the RL FWHM remains unchanged. The Ag-NP-induced plasmonic effect improves the RL efficiency of the PPO-decorated CsPbBr3 nanocrystals by ≈10%. The obtained results demonstrate that a plasmonic process can strengthen the RL of X-ray scintillators for X-ray detection and imaging.
AB - Nanocrystals of CsPbBr3, a colloidal perovskite, are hybridized with silver nanoparticles (Ag NPs) and organic molecules (2,5-diphenyloxazole, PPO) to improve X-ray radioluminescence (RL). It is known that charge transfer from the PPO molecules to the CsPbBr3 nanocrystals enhances the RL efficiency of the CsPbBr3 nanocrystals. In this study, Ag NPs are introduced to further enhance the RL efficiency. The plasmonic process of the Ag NPs is activated by the PPO molecules, which contain X-ray-induced high-energy charges. Subsequently, electric fields induced by the plasmonic process of the Ag NPs accelerate the charge transfer from the PPO molecules to the CsPbBr3 nanocrystals. The plasmonic effect of the Ag NPs is demonstrated by the full-width half maximum (FWHM): the photoluminescence FWHM of the hybridized CsPbBr3 nanocrystals is reduced, whereas the RL FWHM remains unchanged. The Ag-NP-induced plasmonic effect improves the RL efficiency of the PPO-decorated CsPbBr3 nanocrystals by ≈10%. The obtained results demonstrate that a plasmonic process can strengthen the RL of X-ray scintillators for X-ray detection and imaging.
KW - liquid scintillators
KW - localized surface plasmon resonance
KW - metal halide perovskites
KW - silver nanoparticles
UR - http://www.scopus.com/inward/record.url?scp=85163886297&partnerID=8YFLogxK
U2 - 10.1002/adom.202300221
DO - 10.1002/adom.202300221
M3 - Article
AN - SCOPUS:85163886297
SN - 2195-1071
VL - 11
JO - Advanced Optical Materials
JF - Advanced Optical Materials
IS - 17
M1 - 2300221
ER -