Temperature dependence of photoluminescence properties of water-soluble ZnSe quantum dots
We have investigated the optical properties of ZnSe quantum dots (QDs) prepared by a hydrothermal method. The photoluminescence (PL)-decay profiles become slower with an increase in temperature up to 160 K, contrary to an ordinary behaviour due to thermal quenching. The temperature dependence of the...
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| Veröffentlicht in: | Journal of physics. Conference series 2019-05, Vol.1220 (1), p.12024 |
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| creator | Lee, Yong-Shin Taniguchi, Taichi Kim, DaeGwi |
| description | We have investigated the optical properties of ZnSe quantum dots (QDs) prepared by a hydrothermal method. The photoluminescence (PL)-decay profiles become slower with an increase in temperature up to 160 K, contrary to an ordinary behaviour due to thermal quenching. The temperature dependence of the PL-decay profile is explained by a three-state model consisting of a ground state and two excited states of the lower-lying bound-exciton and higher-lying dark-exciton states. The analysis of the temperature dependence of the decay time indicates that the dark-exciton state contributes to the PL-decay process in the ZnSe QDs. |
| doi_str_mv | 10.1088/1742-6596/1220/1/012024 |
| format | Article |
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The photoluminescence (PL)-decay profiles become slower with an increase in temperature up to 160 K, contrary to an ordinary behaviour due to thermal quenching. The temperature dependence of the PL-decay profile is explained by a three-state model consisting of a ground state and two excited states of the lower-lying bound-exciton and higher-lying dark-exciton states. The analysis of the temperature dependence of the decay time indicates that the dark-exciton state contributes to the PL-decay process in the ZnSe QDs.</description><identifier>ISSN: 1742-6588</identifier><identifier>EISSN: 1742-6596</identifier><identifier>DOI: 10.1088/1742-6596/1220/1/012024</identifier><language>eng</language><publisher>Bristol: IOP Publishing</publisher><subject>Decay rate ; Excitons ; Optical properties ; Photoluminescence ; Physics ; Quantum dots ; Temperature ; Temperature dependence</subject><ispartof>Journal of physics. 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The analysis of the temperature dependence of the decay time indicates that the dark-exciton state contributes to the PL-decay process in the ZnSe QDs.</description><subject>Decay rate</subject><subject>Excitons</subject><subject>Optical properties</subject><subject>Photoluminescence</subject><subject>Physics</subject><subject>Quantum dots</subject><subject>Temperature</subject><subject>Temperature dependence</subject><issn>1742-6588</issn><issn>1742-6596</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><sourceid>O3W</sourceid><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><recordid>eNqFkEtLxDAQgIMouK7-BgvehNo82qQ9yuKTBYVdD3oJbTrBLtumJinivze1siIIziXDzDcz4UPolOALgvM8ISKlMc8KnhBKcUISTCim6R6a7Tr7uzzPD9GRcxuMWQgxQ89raHuwpR8sRDX00NXQKYiMjvpX4812aJsOnPoq9tYE1jfgxv576cHGLiDVFqKXbgXR21B2fmij2nh3jA50uXVw8v3O0dP11XpxGy8fbu4Wl8tYpTTzMeeVwlQXuWCEaK1pVZc8UwyAKBHqinGdQ8rzgmEQWrCa1gWpBEt5xhgBNkdn097wu7cBnJcbM9gunJQ045xkvCAiUGKilDXOWdCyt01b2g9JsBw9ytGQHG3J0aMkcvIYJs-nycb0P6vvHxer36Dsax1g9gf834lPxcWDVg</recordid><startdate>20190501</startdate><enddate>20190501</enddate><creator>Lee, Yong-Shin</creator><creator>Taniguchi, Taichi</creator><creator>Kim, DaeGwi</creator><general>IOP Publishing</general><scope>O3W</scope><scope>TSCCA</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>8FD</scope><scope>8FE</scope><scope>8FG</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>ARAPS</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>H8D</scope><scope>HCIFZ</scope><scope>L7M</scope><scope>P5Z</scope><scope>P62</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope></search><sort><creationdate>20190501</creationdate><title>Temperature dependence of photoluminescence properties of water-soluble ZnSe quantum dots</title><author>Lee, Yong-Shin ; Taniguchi, Taichi ; Kim, DaeGwi</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c425t-66bc02f987311fff2bda65c3ee1c72f9c36f8e468930e7f73d2d91b73465331e3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2019</creationdate><topic>Decay rate</topic><topic>Excitons</topic><topic>Optical properties</topic><topic>Photoluminescence</topic><topic>Physics</topic><topic>Quantum dots</topic><topic>Temperature</topic><topic>Temperature dependence</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Lee, Yong-Shin</creatorcontrib><creatorcontrib>Taniguchi, Taichi</creatorcontrib><creatorcontrib>Kim, DaeGwi</creatorcontrib><collection>Institute of Physics Open Access Journal Titles</collection><collection>IOPscience (Open Access)</collection><collection>CrossRef</collection><collection>Technology Research Database</collection><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest Central UK/Ireland</collection><collection>Advanced Technologies & Aerospace Collection</collection><collection>ProQuest Central Essentials</collection><collection>ProQuest Central</collection><collection>Technology Collection</collection><collection>ProQuest One Community College</collection><collection>ProQuest Central Korea</collection><collection>Aerospace Database</collection><collection>SciTech Premium Collection</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>Advanced Technologies & Aerospace Database</collection><collection>ProQuest Advanced Technologies & Aerospace Collection</collection><collection>Publicly Available Content Database</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central China</collection><jtitle>Journal of physics. 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| subjects | Decay rate Excitons Optical properties Photoluminescence Physics Quantum dots Temperature Temperature dependence |
| title | Temperature dependence of photoluminescence properties of water-soluble ZnSe quantum dots |
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