Delayed Fluorescence and Triplet-Triplet Annihilation inπ-Conjugated Polymers

Autor:	J. Partee, Thomas J. Barton, B. L. Uhlhorn, E. L. Frankevich, Y. W. Ding, Joseph Shinar
Rok vydání:	1999
Předmět:	chemistry.chemical_classification Annihilation Materials science Condensed matter physics Exciton General Physics and Astronomy Polymer Conjugated system Triplet triplet annihilation Fluorescence Crystallography chemistry Phenylene Sign (mathematics)
Zdroj:	Physical Review Letters. 82:3673-3676
ISSN:	1079-7114 0031-9007
DOI:	10.1103/physrevlett.82.3673
Popis:	The delayed fluorescence of poly(p -phenylene vinylene) (PPV) and poly(p -phenylene ethynylene) (PPE) derivative solids and frozen solutions at 20thinspthinspK is described. It provides strong evidence for triplet-triplet annihilation to singlets excitons, accounting for up to {approximately}{number_sign}{number_sign}3{percent} of the total emission in PPV films and {approximately}{number_sign}{number_sign}1.5{percent} in PPE powder. It also yields triplet lifetimes of 70 and 110 {mu}s in PPV films and frozen solutions, and {approximately}{number_sign}{number_sign}200 and {approximately}{number_sign}{number_sign}500 {mu} s in PPE powder and frozen solutions, respectively. {copyright} {ital 1999} {ital The American Physical Society}
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::daf44015a901abfced0c7909f991d5cf https://doi.org/10.1103/physrevlett.82.3673 Zobrazit plný text záznamu