Emission Control from Transition Metal Dichalcogenide Monolayers by Aggregation-Induced Molecular Rotors
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- Australian National Univ., Canberra, ACT (Australia)
- Donghua Univ., Shanghai (China). State Key Lab. for Modification of Chemical Fibers and Polymer Materials
- Jiangsu Univ. of Science and Technology, Zhenjiang (China)
- Soochow Univ., Suzhou (China). State and Local Joint Engineering Lab. for Novel Functional Polymeric Materials, Lab. of Advanced Optoelectronic Materials
- National Renewable Energy Lab. (NREL), Golden, CO (United States)
Organic–inorganic (O–I) heterostructures, consisting of atomically thin inorganic semiconductors and organic molecules, present synergistic and enhanced optoelectronic properties with a high tunability. Here, we develop a class of air-stable vertical O–I heterostructures comprising a monolayer of transition-metal dichalcogenides (TMDs), including WS2, WSe2, and MoSe2, on top of tetraphenylethylene (TPE) core-based aggregation-induced emission (AIE) molecular rotors. The created O–I heterostructures yields a photoluminescence (PL) enhancement of up to ~950%, ~500%, and ~330% in the top monolayer WS2, MoSe2, and WSe2 as compared to PL in their pristine monolayers, respectively. The strong PL enhancement is mainly attributed to the efficient photogenerated carrier process in the AIE luminogens (courtesy of their restricted intermolecular motions in the solid state) and the charge-transfer process in the created type I O–I heterostructures. Moreover, we observe an improvement in photovoltaic properties of the TMDs in the heterostructures including the quasi-Fermi level splitting, minority carrier lifetime, and light absorption. Overall, this work presents an inspiring example of combining stable, highly luminescent AIE-based molecules, with rich photochemistry and versatile applications, with atomically thin inorganic semiconductors for multifunctional and efficient optoelectronic devices.
- Research Organization:
- National Renewable Energy Lab. (NREL), Golden, CO (United States)
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office; National Natural Science Foundation of China (NSFC)
- Grant/Contract Number:
- AC36-08GO28308; 51973030
- OSTI ID:
- 1660010
- Report Number(s):
- NREL/JA-5K00-75540; MainId:6138; UUID:37b4e4a6-8714-ea11-9c2a-ac162d87dfe5; MainAdminID:13766
- Journal Information:
- ACS Nano, Vol. 14, Issue 6; ISSN 1936-0851
- Publisher:
- American Chemical Society (ACS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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