TY - JOUR
T1 - Large-Area Fabrication of Hexaazatrinaphthylene-Based 2D Metal-Organic Framework Films for Flexible Photodetectors and Optoelectronic Synapses
AU - Song, Jiajun
AU - Liu, Chun Ki
AU - Piradi, Venkatesh
AU - Chen, Changsheng
AU - Zhu, Ye
AU - Zhu, Xunjin
AU - Li, Li
AU - Wong, Wai Yeung
AU - Yan, Feng
N1 - J.S., C.-K.L., and V.P. contributed equally to this work. This work was financially supported by the Research Grants Council (RGC) of Hong Kong, China (Project No. 15306822) and The Hong Kong Polytechnic University (Project No. 1-WZ0V, 1-YXBS, and 1-ZE2X). L.L. thanks the support by the NSFC General Program (Grant Number 32071906) from the National Natural Science Foundation of China. X.Z. thanks the financial support by General Research Fund (HKBU 12304320) and NSFC/RGC Joint Research Scheme (N_HKBU213/22) from RGC, and Initiation Grant for Faculty Niche Research Areas (IG-FNRA) (2020/21)-RC-FNRA-IG/20-21/SCI/06 from Hong Kong Baptist University. W.-Y.W. thanks the RGC Senior Research Fellowship Scheme (SRFS2021-5S01), the Hong Kong Research Grants Council (PolyU 15307321), and Miss Clarea Au for the Endowed Professorship in Energy (847S).
Publisher Copyright:
© 2023 The Authors. Advanced Science published by Wiley-VCH GmbH.
PY - 2024/4/3
Y1 - 2024/4/3
N2 - 2D conjugated metal-organic frameworks (c-MOFs) have emerged as promising materials for (opto)electronic applications due to their excellent charge transport properties originating from the unique layered-stacked structures with extended in-plane conjugation. The further advancement of MOF-based (opto)electronics necessitates the development of novel 2D c-MOF thin films with high quality. Cu-HHHATN (HHHATN: hexahydroxyl-hexaazatrinaphthylene) is a recently reported 2D c-MOF featuring high in-plane conjugation, strong interlayer π–π stacking, and multiple coordination sites, while the production of its thin-film form has not yet been reported. Herein, large-area Cu-HHHATN thin films with preferential orientation, high uniformity, and smooth surfaces are realized by using a convenient layer-by-layer growth method. Flexible photodetectors are fabricated, showing broadband photoresponse ranging from UV to short-wave infrared (370 to 1450 nm). The relatively long relaxation time of photocurrent, which arises from the trapping of photocarriers, renders the device's synaptic plasticity similar to that of biological synapses, promising its use in neuromorphic visual systems. This work demonstrates the great potential of Cu-HHHATN thin films in flexible optoelectronic devices for various applications.
AB - 2D conjugated metal-organic frameworks (c-MOFs) have emerged as promising materials for (opto)electronic applications due to their excellent charge transport properties originating from the unique layered-stacked structures with extended in-plane conjugation. The further advancement of MOF-based (opto)electronics necessitates the development of novel 2D c-MOF thin films with high quality. Cu-HHHATN (HHHATN: hexahydroxyl-hexaazatrinaphthylene) is a recently reported 2D c-MOF featuring high in-plane conjugation, strong interlayer π–π stacking, and multiple coordination sites, while the production of its thin-film form has not yet been reported. Herein, large-area Cu-HHHATN thin films with preferential orientation, high uniformity, and smooth surfaces are realized by using a convenient layer-by-layer growth method. Flexible photodetectors are fabricated, showing broadband photoresponse ranging from UV to short-wave infrared (370 to 1450 nm). The relatively long relaxation time of photocurrent, which arises from the trapping of photocarriers, renders the device's synaptic plasticity similar to that of biological synapses, promising its use in neuromorphic visual systems. This work demonstrates the great potential of Cu-HHHATN thin films in flexible optoelectronic devices for various applications.
KW - 2D conjugated metal-organic frameworks
KW - flexible photodetectors
KW - hexaazatrinaphthylene
KW - large-area thin films
KW - optoelectronic synapses
UR - http://www.scopus.com/inward/record.url?scp=85182832739&partnerID=8YFLogxK
U2 - 10.1002/advs.202305551
DO - 10.1002/advs.202305551
M3 - Journal article
C2 - 38263724
AN - SCOPUS:85182832739
SN - 2198-3844
VL - 11
JO - Advanced Science
JF - Advanced Science
IS - 13
M1 - 2305551
ER -