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A new model for optimization of organic light-emitting device by concurrent incorporation of electrical and optical simulations
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10.1063/1.4759257
/content/aip/journal/jap/112/8/10.1063/1.4759257
http://aip.metastore.ingenta.com/content/aip/journal/jap/112/8/10.1063/1.4759257

Figures

Image of FIG. 1.
FIG. 1.

(a) Energy band diagrams of NPB, Alq3, and DCJTB. The organic layer thickness (cavity length) is fixed at 135 nm and Y = 35, 50, 65, and 80 nm (the thickness of each layer is not to scale) (b) UV-visible absorption spectrum of DCJTB and PL spectra of Alq3 and Alq3 doped DCJTB.

Image of FIG. 2.
FIG. 2.

(a) Current density and (b) luminance versus voltage of devices with NPB/Alq3 thickness of 35/60 (Device A), 50/45 (Device B), 65/30 (Device C), and 80/15 (Device D) nm.

Image of FIG. 3.
FIG. 3.

The luminous efficiency (cd/A) versus current density of Devices A to D.

Image of FIG. 4.
FIG. 4.

Electrical simulation results for change of emission zone position (a) free carrier recombination and direct recombination and (b) total carrier combination rate of Devices A to D.

Image of FIG. 5.
FIG. 5.

(a) Refractive indices and (b) absorption coefficients versus wavelength used in our optical simulation. (c) The comparison of refractive indices of 1% DCJTB dropped in Alq3 and prinstine Alq3.

Image of FIG. 6.
FIG. 6.

EL intensity and optical power of Devices A to D. All the cases are normalized to the case of Device A (NPB/Alq3 = 35/60 nm).

Image of FIG. 7.
FIG. 7.

(a) Experiment and (b) simulation with and (c) without considering electrical effect of Devices A to D for evaluating the relative EL spectra.

Image of FIG. 8.
FIG. 8.

Experiment and simulation of Devices A to D for evaluating (a) the relative EL intensity and (b) relative power.

Image of FIG. 9.
FIG. 9.

Schematic illustration for E-O tuning region and the best positions of optical interference, charge balance, and recombination emission.

Tables

Generic image for table
Table I.

TABLE I. Field-dependent carrier mobility, relative dielectric constants, HOMO and LUMO of organic materials used in this study.

Generic image for table
Table II.

Parameters of Alq3 (host) and DCJTB (dopant) for the calculation of exciton density.

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/content/aip/journal/jap/112/8/10.1063/1.4759257
2012-10-18
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: A new model for optimization of organic light-emitting device by concurrent incorporation of electrical and optical simulations
http://aip.metastore.ingenta.com/content/aip/journal/jap/112/8/10.1063/1.4759257
10.1063/1.4759257
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