Mass attenuation coefficient of the photon cross section for PTAA, calculated using XCOM. Inset: quantum efficiency (QE) for PTAA films of increasing thickness at incident x-ray photon energies of (●) 10 keV, (◼) 20 keV, (○) 60 keV, (▼) 300 keV, and (▲) 6 MeV.
Comparison of the UV-vis (dashed line) and PL (solid line) spectra of PTAA. The laser line (L) and the peaks due to structural resonance (A–D) are indicated. Also shown (inset) is the chemical structure of PTAA.
Typical dc characteristics of PTAA diodes. Semilog current-voltage characteristic of (A) ITO/PEDOT:PSS/PTAA/Au and (B) ITO/PEDOT:PSS/Al diodes with PTAA layers annealed at (solid line) and (dash line). Inset: Linear current-voltage plots for the devices. (C) Fitting of the data using the Poole–Frenkel conduction model (dashed lines). Inset in (C): energy levels (in eV) in the various components of the diodes.
Comparison of the UV-vis (solid line) and optical photocurrent spectra for ITO/PTAA/metal diodes: with gold electrodes, with illumination through (A) the ITO and (B) the Au, and with aluminum electrodes, with illumination through the ITO (C) and the Al (D). In each case, the ITO electrode is biased positively (●) and negatively (▲).
Thermal analysis of PTAA. (A) MDSC thermogram (inset: full range) and (B) thermogravimetric analysis of (P) dry PTAA powder and (F) freshly cast PTAA thick film (inset: full range for P).
Corrected x-ray photocurrent vs applied voltage at increasing dose rates for a reverse-biased ITO/PEDOT:PSS/PTAA/Al diode with a thick PTAA layer annealed at and irradiated through the ITO electrode. Dose rates: (a) , (b) , (c) , (d) , (e) , (f) , and (g) . Inset: corrected x-ray photocurrent vs x-ray dose rate at −300 V applied operating voltage. Data in both cases are inverted for clarity.
X-ray photocurrent vs applied dose rate measured (●) after completion of the diode and (▲) 6 months later for a reverse-biased ITO/PEDOT:PSS/PTAA/Au diode with a thick PTAA layer. The dashed line is the regression line for all the data in the plot .
Deposition conditions for polymer films.
Diode parameters calculated from the Poole–Frenkel plot in Fig. 3(C).
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