Transmission electron micrograph of sample containing CdSe tetrapods.
Absorption spectra of CdSe tetrapods in toluene (filled circles), blend film (open circles), and film (squares). The chemical structure of is also shown.
(a) Short-circuit EQE action spectra of photovoltaic devices fabricated with CdSe and using different solvents: chloroform (solid line) and TCB (dashed line). (b) Current density vs voltage for the same devices illuminated under a simulated AM1.5 global spectrum at .
Tapping-mode AFM image of blends of CdSe and spin-coated from (a) chloroform and (b) TCB. The lateral scale is .
ESEM image of the cross section of a film fabricated by spin-coating a mixture of equal volumes of CdSe in chloroform/pyridine and in TCB onto mica.
Normalized short-circuit EQE action spectra of photovoltaic devices in which the active layer is composed of (a) blends fabricated using TCB or (b) blends fabricated by chloroform illuminated through ITO electrode (solid line) or aluminum electrode (dashed line). The spectra are normalized at .
Photoluminescence decay at in blends of CdSe tetrapods and spin-coated from TCB (circles) or chloroform (squares). Data for a pristine film are also shown (triangles).
Photoinduced absorption spectra of blends of CdSe tetrapods and spin-coated from TCB (doted line) and chloroform (solid line). Excitation was at at room temperature. The upper two curves (negative ) are the X-channel components of the signals, while the lower two (positive ) are the Y-channel components. For comparison, the data for the chloroform blends have been scaled up by a factor of 1.1 relative to the data for TCB blends, to account for the different transmittances of the two films.
Photovoltaic device parameters for devices fabricated using different solvents under monochromatic illumination (intensity for chloroform device and for TCB device) and under simulated AM1.5 global solar conditions at an intensity of .
Article metrics loading...
Full text loading...