DELAYED FLUORESCENCE AND TRIPLET-TRIPLET ANNIHILATION IN PI -CONJUGATED POLYMERS
DELAYED FLUORESCENCE AND TRIPLET-TRIPLET ANNIHILATION IN PI -CONJUGATED POLYMERS
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DOI：
10.1103/physrevlett.82.3673
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发表时间：
1999-05
影响因子：
8.6
通讯作者：
J. Partee;E. Frankevich;B. Uhlhorn;J. Shinar;Y. Ding;T. Barton
中科院分区：
文献类型：
--
作者：
J. Partee;E. Frankevich;B. Uhlhorn;J. Shinar;Y. Ding;T. Barton
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}
