TY - JOUR
T1 - Pressure Effect on Electronic and Excitonic Properties of Purely J-Aggregated Monolayer Organic Semiconductor
AU - Li, Ruiping
AU - Wang, Meng
AU - Zhao, Huijuan
AU - Bian, Zheng
AU - Wang, Xinran
AU - Cheng, Yingchun
AU - Huang, Wei
N1 - Publisher Copyright:
Copyright © 2020 American Chemical Society.
PY - 2020/8/6
Y1 - 2020/8/6
N2 - Different from monolayer inorganic semiconductors, such as transition metal dichalcogenides, monolayer organic semiconductors derived from perylene have attracted much attention because of their strong absorption and bright photoluminescence (PL). Pressure has proved to be an effective tool in probing the exciton behavior in monolayer semiconductors. Here, by studying the high-pressure behavior of purely J-aggregated monolayer organic semiconductors experimentally and theoretically, we find a red shift of PL spectra due to a decrease of band gap, which is consistent with fluorescent images taken under pressure. The PL center dominates the perylene group and the band edges are flat, indicating Frenkel exciton in the monolayer organic semiconductor under ambient conditions. With increasing pressure, the band edges become more dispersive, suggesting the exciton transform to Wannier-Mott exciton, which is commonly observed in inorganic semiconductors.
AB - Different from monolayer inorganic semiconductors, such as transition metal dichalcogenides, monolayer organic semiconductors derived from perylene have attracted much attention because of their strong absorption and bright photoluminescence (PL). Pressure has proved to be an effective tool in probing the exciton behavior in monolayer semiconductors. Here, by studying the high-pressure behavior of purely J-aggregated monolayer organic semiconductors experimentally and theoretically, we find a red shift of PL spectra due to a decrease of band gap, which is consistent with fluorescent images taken under pressure. The PL center dominates the perylene group and the band edges are flat, indicating Frenkel exciton in the monolayer organic semiconductor under ambient conditions. With increasing pressure, the band edges become more dispersive, suggesting the exciton transform to Wannier-Mott exciton, which is commonly observed in inorganic semiconductors.
UR - http://www.scopus.com/inward/record.url?scp=85089610320&partnerID=8YFLogxK
U2 - 10.1021/acs.jpclett.0c01809
DO - 10.1021/acs.jpclett.0c01809
M3 - 文章
C2 - 32631059
AN - SCOPUS:85089610320
SN - 1948-7185
VL - 11
SP - 5896
EP - 5901
JO - Journal of Physical Chemistry Letters
JF - Journal of Physical Chemistry Letters
IS - 15
ER -