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Mobility as a function of applied pressure, for single layer samples (filled symbols) and dual layer samples (open symbols), at . Thicknesses in are 12.6 and 12.0 for TAPC; 12.0 and 12.6 for DMPAB; and 11.3 and 11.6 for TPD, single and dual layers, respectively.
Mobility as a function of device thickness, for TAPC, DMPAB, and TPD. At three different electric fields, a series of different thickness single layer samples (filled symbols) are compared to a dual layer sample (open symbols). Each point represents the average of two different samples, measured three times. The dotted lines are to guide the eye along the trend for each of the applied fields.
Time-of-flight hole transients, at , for similar thickness single layer samples (filled circles) and dual layer samples (plus symbols).
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