Temperature Dependent Radiative Lifetime of J-Aggregates
The emission quantum yield of carbocyanine dye J-aggregates decreased 4-fold when temperature increased from 20 to 80 K. Independent measurements of the emission quantum yield and decay were used to calculate both radiative and nonradiative rate constants in the temperature range of 4−140 K. The rad...
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| Veröffentlicht in: | Journal of physical chemistry (1952) 1996-05, Vol.100 (21), p.8640-8644 |
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| container_end_page | 8644 |
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| container_issue | 21 |
| container_start_page | 8640 |
| container_title | Journal of physical chemistry (1952) |
| container_volume | 100 |
| creator | Kamalov, Valey F Struganova, Irina A Yoshihara, Keitaro |
| description | The emission quantum yield of carbocyanine dye J-aggregates decreased 4-fold when temperature increased from 20 to 80 K. Independent measurements of the emission quantum yield and decay were used to calculate both radiative and nonradiative rate constants in the temperature range of 4−140 K. The radiative lifetime is found to linearly increase as temperature rises and is explained by the two-dimensional structure of J-aggregates assuming thermal distribution of excitons with the requirement that only excitons with a small value of the center-of-mass wave vector can recombine radiatively. Nonradiative relaxation becomes efficient with a rise of temperature and is explained by exciton self-trapping. |
| doi_str_mv | 10.1021/jp9522472 |
| format | Article |
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Independent measurements of the emission quantum yield and decay were used to calculate both radiative and nonradiative rate constants in the temperature range of 4−140 K. The radiative lifetime is found to linearly increase as temperature rises and is explained by the two-dimensional structure of J-aggregates assuming thermal distribution of excitons with the requirement that only excitons with a small value of the center-of-mass wave vector can recombine radiatively. Nonradiative relaxation becomes efficient with a rise of temperature and is explained by exciton self-trapping.</description><identifier>ISSN: 0022-3654</identifier><identifier>EISSN: 1541-5740</identifier><identifier>DOI: 10.1021/jp9522472</identifier><language>eng</language><publisher>American Chemical Society</publisher><ispartof>Journal of physical chemistry (1952), 1996-05, Vol.100 (21), p.8640-8644</ispartof><rights>Copyright © 1996 American Chemical Society</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a295t-5abbbdf00fb3c226074cc64970ad4abe5b37943724ed7cfe4a053bf37d0f41063</citedby><cites>FETCH-LOGICAL-a295t-5abbbdf00fb3c226074cc64970ad4abe5b37943724ed7cfe4a053bf37d0f41063</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://pubs.acs.org/doi/pdf/10.1021/jp9522472$$EPDF$$P50$$Gacs$$H</linktopdf><linktohtml>$$Uhttps://pubs.acs.org/doi/10.1021/jp9522472$$EHTML$$P50$$Gacs$$H</linktohtml><link.rule.ids>314,780,784,2765,27076,27924,27925,56738,56788</link.rule.ids></links><search><creatorcontrib>Kamalov, Valey F</creatorcontrib><creatorcontrib>Struganova, Irina A</creatorcontrib><creatorcontrib>Yoshihara, Keitaro</creatorcontrib><title>Temperature Dependent Radiative Lifetime of J-Aggregates</title><title>Journal of physical chemistry (1952)</title><addtitle>J. Phys. Chem</addtitle><description>The emission quantum yield of carbocyanine dye J-aggregates decreased 4-fold when temperature increased from 20 to 80 K. Independent measurements of the emission quantum yield and decay were used to calculate both radiative and nonradiative rate constants in the temperature range of 4−140 K. The radiative lifetime is found to linearly increase as temperature rises and is explained by the two-dimensional structure of J-aggregates assuming thermal distribution of excitons with the requirement that only excitons with a small value of the center-of-mass wave vector can recombine radiatively. 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Phys. Chem</addtitle><date>1996-05-23</date><risdate>1996</risdate><volume>100</volume><issue>21</issue><spage>8640</spage><epage>8644</epage><pages>8640-8644</pages><issn>0022-3654</issn><eissn>1541-5740</eissn><abstract>The emission quantum yield of carbocyanine dye J-aggregates decreased 4-fold when temperature increased from 20 to 80 K. Independent measurements of the emission quantum yield and decay were used to calculate both radiative and nonradiative rate constants in the temperature range of 4−140 K. The radiative lifetime is found to linearly increase as temperature rises and is explained by the two-dimensional structure of J-aggregates assuming thermal distribution of excitons with the requirement that only excitons with a small value of the center-of-mass wave vector can recombine radiatively. Nonradiative relaxation becomes efficient with a rise of temperature and is explained by exciton self-trapping.</abstract><pub>American Chemical Society</pub><doi>10.1021/jp9522472</doi><tpages>5</tpages></addata></record> |
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| issn | 0022-3654 1541-5740 |
| language | eng |
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| source | ACS Publications |
| title | Temperature Dependent Radiative Lifetime of J-Aggregates |
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