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(Color online) (a) Chemical structure of the materials used. (b) Schematic device structure. (c) Energy band diagram of the device.
(Color online) Absorption spectra in reflectance mode for device structure ITO/PEDOT/TT/CuPc .
(Color online) Current density–voltage characteristics under illumination for devices with CuPc sandwich layer thickness varying from .
(Color online) External quantum efficiency of sandwich structure devices with CuPc layer thickness varying from .
Summary of device parameters for the sandwich device structure with varying CuPc sandwich layer thickness. Device parameters for device are also given.
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