Direct triplet sensitization of oligothiophene by quantum dots

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dc.citation.firstpage6120
dc.citation.journalTitleChemical Science
dc.citation.lastpage6124
dc.citation.volumeNumber10
dc.contributor.authorXu, Zihao
dc.contributor.authorJin, Tao
dc.contributor.authorHuang, Yiming
dc.contributor.authorMulla, Karimulla
dc.contributor.authorEvangelista, Francesco A.
dc.contributor.authorEgap, Eilaf
dc.contributor.authorLian, Tianquan
dc.date.accessioned2019-08-28T16:10:11Z
dc.date.available2019-08-28T16:10:11Z
dc.date.issued2019
dc.description.abstractEffective sensitization of triplet states is essential to many applications, including triplet–triplet annihilation based photon upconversion schemes. This work demonstrates successful triplet sensitization of a CdSe quantum dot (QD)–bound oligothiophene carboxylic acid (T6). Transient absorption spectroscopy provides direct evidence of Dexter-type triplet energy transfer from the QD to the acceptor without populating the singlet excited state or charge transfer intermediates. Analysis of T6 concentration dependent triplet formation kinetics shows that the intrinsic triplet energy transfer rate in 1[thin space (1/6-em)]:[thin space (1/6-em)]1 QD–T6 complexes is 0.077 ns−1 and the apparent transfer rate and efficiency can be improved by increasing the acceptor binding strength. This work demonstrates a new class of triplet acceptor molecules for QD-based upconversion systems that are more stable and tunable than the extensively studied polyacenes.
dc.identifier.citationXu, Zihao, Jin, Tao, Huang, Yiming, et al.. "Direct triplet sensitization of oligothiophene by quantum dots." <i>Chemical Science,</i> 10, (2019) Royal Society of Chemistry: 6120-6124. https://doi.org/10.1039/C9SC01648A.
dc.identifier.doihttps://doi.org/10.1039/C9SC01648A
dc.identifier.urihttps://hdl.handle.net/1911/107368
dc.language.isoeng
dc.publisherRoyal Society of Chemistry
dc.rightsThis Open Access Article is licensed under a Creative Commons Attribution-Non Commercial 3.0 Unported Licence
dc.rights.urihttps://creativecommons.org/licenses/by-nc/3.0/
dc.titleDirect triplet sensitization of oligothiophene by quantum dots
dc.typeJournal article
dc.type.dcmiText
dc.type.publicationpublisher version
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