Journal
ADVANCED FUNCTIONAL MATERIALS
Volume 21, Issue 8, Pages 1505-1510Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201002293
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Funding
- European Commission [IST-004607 (OLLA)]
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The charge transport in blue light-emitting polyspirobifluorene is investigated by both steady-state current-voltage measurements and transient electroluminescence. Both measurement techniques yield consistent results and show that the hole transport is space-charge limited. The electron current is found to be governed by a high intrinsic mobility in combination with electron traps. Numerical simulations on light-emitting diodes reveal a shift in the recombination zone from the cathode to the anode with increasing bias.
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