TY - JOUR
T1 - Template-Modulated Afterglow of Carbon Dots in Zeolites
T2 - Room-Temperature Phosphorescence and Thermally Activated Delayed Fluorescence
AU - Liu, Jiancong
AU - Zhang, Hongyue
AU - Wang, Ning
AU - Yu, Yue
AU - Cui, Yuanzheng
AU - Li, Jiyang
AU - Yu, Jihong
N1 - Publisher Copyright:
© 2019 American Chemical Society.
PY - 2019/7/1
Y1 - 2019/7/1
N2 - Room-temperature phosphorescence (RTP) and thermally activated delayed fluorescence (TADF) materials with long afterglow lifetimes have aroused considerable interest. Here, we successfully achieve the modulation of RTP and TADF properties in a carbon dots (CDs)-in-zeolite system based on different organic templates via an in situ solvothermal synthetic method. Benefitting from the efficient stabilizing effect of triplet states of CDs by SBT zeolite matrix, CDs@SBT-1 with a larger singlet-triplet energy gap (ΔEST) of 0.36 eV exhibits predominant RTP with a lifetime of 574 ms, while CDs@SBT-2 with a smaller ΔEST value of 0.18 eV shows TADF with a lifetime of 153 ms. Further investigations reveal that different organic templates result in different CDs structures, thus modulating the ΔEST values of CDs@zeolites. This work demonstrates a facile strategy to modulate the afterglow properties of CDs@zeolite composites, which opens the possibility of designing the novel afterglow materials desired for various advanced applications.
AB - Room-temperature phosphorescence (RTP) and thermally activated delayed fluorescence (TADF) materials with long afterglow lifetimes have aroused considerable interest. Here, we successfully achieve the modulation of RTP and TADF properties in a carbon dots (CDs)-in-zeolite system based on different organic templates via an in situ solvothermal synthetic method. Benefitting from the efficient stabilizing effect of triplet states of CDs by SBT zeolite matrix, CDs@SBT-1 with a larger singlet-triplet energy gap (ΔEST) of 0.36 eV exhibits predominant RTP with a lifetime of 574 ms, while CDs@SBT-2 with a smaller ΔEST value of 0.18 eV shows TADF with a lifetime of 153 ms. Further investigations reveal that different organic templates result in different CDs structures, thus modulating the ΔEST values of CDs@zeolites. This work demonstrates a facile strategy to modulate the afterglow properties of CDs@zeolite composites, which opens the possibility of designing the novel afterglow materials desired for various advanced applications.
UR - http://www.scopus.com/inward/record.url?scp=85071611671&partnerID=8YFLogxK
U2 - 10.1021/acsmaterialslett.9b00073
DO - 10.1021/acsmaterialslett.9b00073
M3 - Article
AN - SCOPUS:85071611671
SN - 2639-4979
VL - 1
SP - 58
EP - 63
JO - ACS Materials Letters
JF - ACS Materials Letters
IS - 1
ER -
