Charge transport and recombination in polyspirobifluorene blue light-emitting diodes
article
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. Copyright © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Topics
charge Transportconjugated polymersorganic light-emitting diodesBlue light-emittingCharge transportCharge transport and recombinationElectron currentsHole transportsMeasurement techniquesNumerical simulationPolyspirobifluoreneRecombination zonesSpace-charge limitedSteady-state currentsTransient electroluminescenceConjugated polymersDiodesLightLight emissionLight emitting diodesOrganic polymersPower qualityOrganic light emitting diodes (OLED)
TNO Identifier
461476
ISSN
1616301X
Source
Advanced Functional Materials, 21(8), pp. 1505-1510.
Pages
1505-1510
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