Configuration (a) and high resolution SEM images [(b)–(e)] of the MC-OLEDs. “Organic multilayer” in (a) refers to or . (b) and (c) are, respectively, the plane-view SEM images of single-layer porous silicon films formed with the parameters for etching the low refractive layer of PS-DBR by dc and pulsed current methods. (d) is a cross-sectional SEM micrograph and (e) is a magnified cross-sectional SEM image of the top part.
Reflection spectra of (a) PS-DBR and (b) MC-OLEDs. In the top panel the solid line is from experimental measurements and the dotted line is from theoretical calculation by the transfer matrix method.
Normal-emission (a) green and (b) red EL spectra of Si-based OLEDs. The solid and hollow symbols represent, respectively, the data from MC-OLEDs and conventional OLEDs. bias is applied for (a), and for (b).
Current-brightness-voltage characteristics of Si-based (a) green and (b) red light-emission MC-OLEDs.
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