Emission Control from Transition Metal Dichalcogenide Monolayers by Aggregation-Induced Molecular Rotors

Tebyetekerwa, Mike; Cheng, Yanhua; Zhang, Jian; Li, Weili; Li, Hongkun; Neupane, Guru Prakash; Wang, Bowen; Truong, Thien N.; Xiao, Chuanxiao; Al-Jassim, Mowafak M.; Yin, Zongyou; Lu, Yuerui; Macdonald, Daniel; Nguyen, Hieu T.

doi:10.1021/acsnano.0c03086

Title: Emission Control from Transition Metal Dichalcogenide Monolayers by Aggregation-Induced Molecular Rotors

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Abstract

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.

Authors:

^[1];

^[2];

^[1]; Li, Weili ^[3]; Li, Hongkun ^[4]; Neupane, Guru Prakash ^[1]; Wang, Bowen ^[1];

^[1]; Xiao, Chuanxiao ^[5]; Al-Jassim, Mowafak M. ^[5];

^[1];

^[1]; Macdonald, Daniel ^[1];

^[1]

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)

Publication Date:: Wed May 13 00:00:00 EDT 2020

Research Org.:: National Renewable Energy Lab. (NREL), Golden, CO (United States)

Sponsoring Org.:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office; National Natural Science Foundation of China (NSFC)

OSTI Identifier:: 1660010

Report Number(s):: NREL/JA-5K00-75540
Journal ID: ISSN 1936-0851; MainId:6138;UUID:37b4e4a6-8714-ea11-9c2a-ac162d87dfe5;MainAdminID:13766

Grant/Contract Number:: AC36-08GO28308; 51973030

Resource Type:: Accepted Manuscript

Journal Name:: ACS Nano

Additional Journal Information:: Journal Volume: 14; Journal Issue: 6; Journal ID: ISSN 1936-0851

Publisher:: American Chemical Society (ACS)

Country of Publication:: United States

Language:: English

Subject:: 14 SOLAR ENERGY; aggregation-induced emission (AIE); molecular rotors; monolayer semiconductors; organic-inorganic heterostructures; photoluminescence pumping; transition metal dichalcogenides

Citation Formats


                    Tebyetekerwa, Mike, Cheng, Yanhua, Zhang, Jian, Li, Weili, Li, Hongkun, Neupane, Guru Prakash, Wang, Bowen, Truong, Thien N., Xiao, Chuanxiao, Al-Jassim, Mowafak M., Yin, Zongyou, Lu, Yuerui, Macdonald, Daniel, and Nguyen, Hieu T. Emission Control from Transition Metal Dichalcogenide Monolayers by Aggregation-Induced Molecular Rotors.  United States: N. p., 2020. 
Web.  doi:10.1021/acsnano.0c03086.

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                    Tebyetekerwa, Mike, Cheng, Yanhua, Zhang, Jian, Li, Weili, Li, Hongkun, Neupane, Guru Prakash, Wang, Bowen, Truong, Thien N., Xiao, Chuanxiao, Al-Jassim, Mowafak M., Yin, Zongyou, Lu, Yuerui, Macdonald, Daniel, & Nguyen, Hieu T. Emission Control from Transition Metal Dichalcogenide Monolayers by Aggregation-Induced Molecular Rotors.  United States.  https://doi.org/10.1021/acsnano.0c03086

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                    Tebyetekerwa, Mike, Cheng, Yanhua, Zhang, Jian, Li, Weili, Li, Hongkun, Neupane, Guru Prakash, Wang, Bowen, Truong, Thien N., Xiao, Chuanxiao, Al-Jassim, Mowafak M., Yin, Zongyou, Lu, Yuerui, Macdonald, Daniel, and Nguyen, Hieu T. Wed .  
"Emission Control from Transition Metal Dichalcogenide Monolayers by Aggregation-Induced Molecular Rotors".  United States.  https://doi.org/10.1021/acsnano.0c03086.  https://www.osti.gov/servlets/purl/1660010.

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@article{osti_1660010,

  title        = {Emission Control from Transition Metal Dichalcogenide Monolayers by Aggregation-Induced Molecular Rotors},

  author       = {Tebyetekerwa, Mike and Cheng, Yanhua and Zhang, Jian and Li, Weili and Li, Hongkun and Neupane, Guru Prakash and Wang, Bowen and Truong, Thien N. and Xiao, Chuanxiao and Al-Jassim, Mowafak M. and Yin, Zongyou and Lu, Yuerui and Macdonald, Daniel and Nguyen, Hieu T.},

  abstractNote = {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.},

  doi          = {10.1021/acsnano.0c03086},

  journal      = {ACS Nano},

  number       = 6,

  volume       = 14,

  place        = {United States},

  year         = {Wed May 13 00:00:00 EDT 2020},

  month        = {Wed May 13 00:00:00 EDT 2020}

}

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