Enhanced excitonic features in an anisotropic ReS2/WSe2 heterostructure
Two-dimensional (2D) semiconductors have opened new horizons for future optoelectronic applications through efficient light–matter and many-body interactions at quantum level. Anisotropic 2D materials like rhenium disulphide (ReS2) present a new class of materials with polarized excitonic resonances...
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Veröffentlicht in: | Nanoscale 2022-08, Vol.14 (30), p.10851-10861 |
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creator | Arslan Usman M Adel Aly Masenda, Hilary Thompson, Joshua J P Gunasekera, Surani M Mucha-Kruczyński, Marcin Brem, Samuel Malic, Ermin Koch, Martin |
description | Two-dimensional (2D) semiconductors have opened new horizons for future optoelectronic applications through efficient light–matter and many-body interactions at quantum level. Anisotropic 2D materials like rhenium disulphide (ReS2) present a new class of materials with polarized excitonic resonances. Here, we demonstrate a WSe2/ReS2 heterostructure which exhibits a significant photoluminescence quenching at room temperature as well as at low temperatures. This indicates an efficient charge transfer due to the electron–hole exchange interaction. The band alignment of two materials suggests that electrons optically injected into WSe2 are transferred to ReS2. Polarization resolved luminescence measurements reveal two additional polarization-sensitive exciton peaks in ReS2 in addition to the two conventional exciton resonances X1 and X2. Furthermore, for ReS2 we observe two charged excitons (trions) with binding energies of 18 meV and 15 meV, respectively. The bi-excitons of WSe2 become polarization sensitive and inherit polarizing properties from the underlying ReS2 layers, which act as patterned substrates for top layer. Overall, our findings provide a better understanding of optical signatures in 2D anisotropic materials. |
doi_str_mv | 10.1039/d2nr01973f |
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Anisotropic 2D materials like rhenium disulphide (ReS2) present a new class of materials with polarized excitonic resonances. Here, we demonstrate a WSe2/ReS2 heterostructure which exhibits a significant photoluminescence quenching at room temperature as well as at low temperatures. This indicates an efficient charge transfer due to the electron–hole exchange interaction. The band alignment of two materials suggests that electrons optically injected into WSe2 are transferred to ReS2. Polarization resolved luminescence measurements reveal two additional polarization-sensitive exciton peaks in ReS2 in addition to the two conventional exciton resonances X1 and X2. Furthermore, for ReS2 we observe two charged excitons (trions) with binding energies of 18 meV and 15 meV, respectively. The bi-excitons of WSe2 become polarization sensitive and inherit polarizing properties from the underlying ReS2 layers, which act as patterned substrates for top layer. 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Anisotropic 2D materials like rhenium disulphide (ReS2) present a new class of materials with polarized excitonic resonances. Here, we demonstrate a WSe2/ReS2 heterostructure which exhibits a significant photoluminescence quenching at room temperature as well as at low temperatures. This indicates an efficient charge transfer due to the electron–hole exchange interaction. The band alignment of two materials suggests that electrons optically injected into WSe2 are transferred to ReS2. Polarization resolved luminescence measurements reveal two additional polarization-sensitive exciton peaks in ReS2 in addition to the two conventional exciton resonances X1 and X2. Furthermore, for ReS2 we observe two charged excitons (trions) with binding energies of 18 meV and 15 meV, respectively. The bi-excitons of WSe2 become polarization sensitive and inherit polarizing properties from the underlying ReS2 layers, which act as patterned substrates for top layer. Overall, our findings provide a better understanding of optical signatures in 2D anisotropic materials.</description><subject>Charge transfer</subject><subject>Electrons</subject><subject>Excitons</subject><subject>Heterostructures</subject><subject>Low temperature</subject><subject>Many body problem</subject><subject>Optoelectronics</subject><subject>Photoluminescence</subject><subject>Polarization</subject><subject>Rhenium</subject><subject>Room temperature</subject><subject>Substrates</subject><subject>Two dimensional materials</subject><issn>2040-3364</issn><issn>2040-3372</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2022</creationdate><recordtype>article</recordtype><recordid>eNpdz1FLwzAQB_AgCs7pi5-g4IsvdUkubZpHGXMKA8EpPo40u7COmtQkBT--KYoPwsH94X4cd4RcM3rHKKjFnrtAmZJgT8iMU0FLAMlP_3ItzslFjEdKawU1zMh65Q7aGdwX-GW65F1nCos6jQFj0blCT9VFn4If8ugFt3zxvkVeHDBh8DGF0Uz4kpxZ3Ue8-u1z8vawel0-lpvn9dPyflMOvOKprCRtGqtaZrWBSiqkLdgcGiFkBZK1DWQAXDAjtKjb_BQ0YGvZMlAWWpiT25-9Q_CfI8a0--iiwb7XDv0Yd7xWjArJgGd6848e_Rhcvm5SUlLFgMI3VdJZdQ</recordid><startdate>20220804</startdate><enddate>20220804</enddate><creator>Arslan Usman</creator><creator>M Adel Aly</creator><creator>Masenda, Hilary</creator><creator>Thompson, Joshua J P</creator><creator>Gunasekera, Surani M</creator><creator>Mucha-Kruczyński, Marcin</creator><creator>Brem, Samuel</creator><creator>Malic, Ermin</creator><creator>Koch, Martin</creator><general>Royal Society of Chemistry</general><scope>7SR</scope><scope>7U5</scope><scope>8BQ</scope><scope>8FD</scope><scope>F28</scope><scope>FR3</scope><scope>JG9</scope><scope>L7M</scope><scope>7X8</scope></search><sort><creationdate>20220804</creationdate><title>Enhanced excitonic features in an anisotropic ReS2/WSe2 heterostructure</title><author>Arslan Usman ; M Adel Aly ; Masenda, Hilary ; Thompson, Joshua J P ; Gunasekera, Surani M ; Mucha-Kruczyński, Marcin ; Brem, Samuel ; Malic, Ermin ; Koch, Martin</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-p252t-57088f9b1fac3579e0b3f35784475371b830883241c4a46b103383f67b139f3b3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2022</creationdate><topic>Charge transfer</topic><topic>Electrons</topic><topic>Excitons</topic><topic>Heterostructures</topic><topic>Low temperature</topic><topic>Many body problem</topic><topic>Optoelectronics</topic><topic>Photoluminescence</topic><topic>Polarization</topic><topic>Rhenium</topic><topic>Room temperature</topic><topic>Substrates</topic><topic>Two dimensional materials</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Arslan Usman</creatorcontrib><creatorcontrib>M Adel Aly</creatorcontrib><creatorcontrib>Masenda, Hilary</creatorcontrib><creatorcontrib>Thompson, Joshua J P</creatorcontrib><creatorcontrib>Gunasekera, Surani M</creatorcontrib><creatorcontrib>Mucha-Kruczyński, Marcin</creatorcontrib><creatorcontrib>Brem, Samuel</creatorcontrib><creatorcontrib>Malic, Ermin</creatorcontrib><creatorcontrib>Koch, Martin</creatorcontrib><collection>Engineered Materials Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>ANTE: Abstracts in New Technology & Engineering</collection><collection>Engineering Research Database</collection><collection>Materials Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>MEDLINE - Academic</collection><jtitle>Nanoscale</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Arslan Usman</au><au>M Adel Aly</au><au>Masenda, Hilary</au><au>Thompson, Joshua J P</au><au>Gunasekera, Surani M</au><au>Mucha-Kruczyński, Marcin</au><au>Brem, Samuel</au><au>Malic, Ermin</au><au>Koch, Martin</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Enhanced excitonic features in an anisotropic ReS2/WSe2 heterostructure</atitle><jtitle>Nanoscale</jtitle><date>2022-08-04</date><risdate>2022</risdate><volume>14</volume><issue>30</issue><spage>10851</spage><epage>10861</epage><pages>10851-10861</pages><issn>2040-3364</issn><eissn>2040-3372</eissn><abstract>Two-dimensional (2D) semiconductors have opened new horizons for future optoelectronic applications through efficient light–matter and many-body interactions at quantum level. Anisotropic 2D materials like rhenium disulphide (ReS2) present a new class of materials with polarized excitonic resonances. Here, we demonstrate a WSe2/ReS2 heterostructure which exhibits a significant photoluminescence quenching at room temperature as well as at low temperatures. This indicates an efficient charge transfer due to the electron–hole exchange interaction. The band alignment of two materials suggests that electrons optically injected into WSe2 are transferred to ReS2. Polarization resolved luminescence measurements reveal two additional polarization-sensitive exciton peaks in ReS2 in addition to the two conventional exciton resonances X1 and X2. Furthermore, for ReS2 we observe two charged excitons (trions) with binding energies of 18 meV and 15 meV, respectively. The bi-excitons of WSe2 become polarization sensitive and inherit polarizing properties from the underlying ReS2 layers, which act as patterned substrates for top layer. Overall, our findings provide a better understanding of optical signatures in 2D anisotropic materials.</abstract><cop>Cambridge</cop><pub>Royal Society of Chemistry</pub><doi>10.1039/d2nr01973f</doi><tpages>11</tpages><oa>free_for_read</oa></addata></record> |
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subjects | Charge transfer Electrons Excitons Heterostructures Low temperature Many body problem Optoelectronics Photoluminescence Polarization Rhenium Room temperature Substrates Two dimensional materials |
title | Enhanced excitonic features in an anisotropic ReS2/WSe2 heterostructure |
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