TY - JOUR
T1 - Zeolite-confined carbon dots
T2 - Tuning thermally activated delayed fluorescence emission: Via energy transfer
AU - Zhang, Hongyue
AU - Liu, Jiancong
AU - Wang, Bolun
AU - Liu, Kaikai
AU - Chen, Guangrui
AU - Yu, Xiaowei
AU - Li, Jiyang
AU - Yu, Jihong
N1 - Publisher Copyright:
© the Partner Organisations 2020.
PY - 2020/5
Y1 - 2020/5
N2 - Confining carbon dots (CDs) in zeolites may boost the thermally activated delayed fluorescence (TADF) emission. However, so far only blue-emissive CD-based TADF materials are reported, and rationally tuning the TADF emission of these materials remains challenging. Herein, by in situ embedding different emissive CDs into a zeolite matrix, we have successfully prepared a series of CD@zeolite composites with tunable TADF emission from blue to green by utilizing energy transfer (ET) between confined CDs. The as-prepared CD@zeolite composites exhibit lifetimes varying from 271 ms to 860 ms and quantum yields ranging from 20% to 42%. The ET process occurs from the singlet excited state of the blue emissive CD donor to the singlet excited state of green emissive CD acceptors with different polymerization degrees, promoting tunable TADF with cyan, mint green and olive green emission. The design concept proposed in this work may open a way to judicious tuning of the emission of TADF materials, and thus may broaden the applications of CD-based TADF materials.
AB - Confining carbon dots (CDs) in zeolites may boost the thermally activated delayed fluorescence (TADF) emission. However, so far only blue-emissive CD-based TADF materials are reported, and rationally tuning the TADF emission of these materials remains challenging. Herein, by in situ embedding different emissive CDs into a zeolite matrix, we have successfully prepared a series of CD@zeolite composites with tunable TADF emission from blue to green by utilizing energy transfer (ET) between confined CDs. The as-prepared CD@zeolite composites exhibit lifetimes varying from 271 ms to 860 ms and quantum yields ranging from 20% to 42%. The ET process occurs from the singlet excited state of the blue emissive CD donor to the singlet excited state of green emissive CD acceptors with different polymerization degrees, promoting tunable TADF with cyan, mint green and olive green emission. The design concept proposed in this work may open a way to judicious tuning of the emission of TADF materials, and thus may broaden the applications of CD-based TADF materials.
UR - http://www.scopus.com/inward/record.url?scp=85078660509&partnerID=8YFLogxK
U2 - 10.1039/c9qm00549h
DO - 10.1039/c9qm00549h
M3 - Article
AN - SCOPUS:85078660509
SN - 2052-1537
VL - 4
SP - 1404
EP - 1410
JO - Materials Chemistry Frontiers
JF - Materials Chemistry Frontiers
IS - 5
ER -