TY - JOUR
T1 - Thermally Activated Delayed Fluorescence Dye-Sensitized Down-Conversion Nanoparticles for Near-Infrared Luminescence Enhancement
AU - Liu, Tongtong
AU - Liang, Ning
AU - Liu, Xiaomeng
AU - Li, Jiaqi
AU - Tu, Langping
AU - Liu, Jianxun
AU - Feng, Yansong
AU - Yao, Chang Jiang
N1 - Publisher Copyright:
© 2024 Wiley-VCH GmbH.
PY - 2024
Y1 - 2024
N2 - Dye-sensitized down-conversion nanoparticles (DCNPs) can significantly enhance photon absorption, bridging the gap of narrow and weak absorption cross-section of lanthanide (Ln) ions, thus fundamentally prompting their near-infrared (NIR) emission. However, the ideal strategy for utilization of both the singlet and triplet energy of the dyes is hindered by the nanostructures and the dependence on the heavy atom effect. Herein, thermally activated delayed fluorescence (TADF) dye is utilized with a small singlet-triplet energy gap as the absorption antenna, achieving a 733 fold emission enhancement. This strategy facilitates efficient intersystem crossing (ISC) and reverse intersystem crossing (RISC) processes, enabling effective energy transfer from singlet (S1) and triplet (T1) excitons to emitted energy levels of Er3+. Combining highly Erbium-doped nanoparticles, the water-dispersed AD-sensitized system shows excellent hydrodynamic stability and photostability. This innovative approach marks the first report of TADF dye-sensitized Ln nanosystems, offering a new direction for photo conversion technology.
AB - Dye-sensitized down-conversion nanoparticles (DCNPs) can significantly enhance photon absorption, bridging the gap of narrow and weak absorption cross-section of lanthanide (Ln) ions, thus fundamentally prompting their near-infrared (NIR) emission. However, the ideal strategy for utilization of both the singlet and triplet energy of the dyes is hindered by the nanostructures and the dependence on the heavy atom effect. Herein, thermally activated delayed fluorescence (TADF) dye is utilized with a small singlet-triplet energy gap as the absorption antenna, achieving a 733 fold emission enhancement. This strategy facilitates efficient intersystem crossing (ISC) and reverse intersystem crossing (RISC) processes, enabling effective energy transfer from singlet (S1) and triplet (T1) excitons to emitted energy levels of Er3+. Combining highly Erbium-doped nanoparticles, the water-dispersed AD-sensitized system shows excellent hydrodynamic stability and photostability. This innovative approach marks the first report of TADF dye-sensitized Ln nanosystems, offering a new direction for photo conversion technology.
KW - down-conversion nanoparticles
KW - dye-sensitization
KW - near-infrared luminescence
KW - thermally activated delayed fluorescence
KW - triplet energy
UR - http://www.scopus.com/inward/record.url?scp=85204635962&partnerID=8YFLogxK
U2 - 10.1002/adom.202402022
DO - 10.1002/adom.202402022
M3 - Article
AN - SCOPUS:85204635962
SN - 2195-1071
JO - Advanced Optical Materials
JF - Advanced Optical Materials
ER -