ELECTROLUMINESCENCE-DETECTED MAGNETIC-RESONANCE STUDY OF POLYPARAPHENYLENEVINYLENE (PPV)-BASED LIGHT-EMITTING-DIODES

被引：129
|
作者：
SWANSON, LS
SHINAR, J
BROWN, AR
BRADLEY, DDC
FRIEND, RH
BURN, PL
KRAFT, A
HOLMES, AB
机构：
[1] IOWA STATE UNIV SCI & TECHNOL, DEPT PHYS & ASTRON, AMES, IA 50011 USA
[2] UNIV CAMBRIDGE, CAVENDISH LAB, CAMBRIDGE CB3 0HE, ENGLAND
[3] UNIV CAMBRIDGE, CHEM LAB, DEPT CHEM, CAMBRIDGE CB2 1EW, ENGLAND
来源：
PHYSICAL REVIEW B | 1992年 / 46卷 / 23期
关键词：
D O I：
10.1103/PhysRevB.46.15072
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The strong electroluminescence (EL)-detected magnetic resonance of PPV-based light emitting diodes is compared to the conductivity (sigma)- and photoluminescence (PL)-detected resonances. It provides direct evidence that polaron-to-singlet exciton conversion is responsible for the EL. In contrast to the narrow PL-enhancing resonance assigned to polaron recombination, strong EL- and sigma-quenching resonances are attributed to the spin-dependent polaron-to-bipolaron decay. The half-field EL- and sigma-detected resonances of two distinct triplet excitons is believed to result from triplet-triplet fusion to singlets.
引用
收藏
页码：15072 / 15077
页数：6
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