Pressure Effect on Electronic and Excitonic Properties of Purely J-Aggregated Monolayer Organic Semiconductor

Ruiping Li, Meng Wang, Huijuan Zhao, Zheng Bian, Xinran Wang, Yingchun Cheng, Wei Huang

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

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.

Original languageEnglish
Pages (from-to)5896-5901
Number of pages6
JournalJournal of Physical Chemistry Letters
Volume11
Issue number15
DOIs
StatePublished - 6 Aug 2020

Fingerprint

Dive into the research topics of 'Pressure Effect on Electronic and Excitonic Properties of Purely J-Aggregated Monolayer Organic Semiconductor'. Together they form a unique fingerprint.

Cite this