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(Color online) The schematic layout of the ITO∕PEDOT:PSS∕MEH-PPV: photodetector on a glass substrate.
TEM images of PbSe QDs in the MEH-PPV host ( of MEH-PPV). The scale bars in the left and right images are 100 and , respectively. Some aggregation of QDs into nonordered clusters is observed.
Photocurrent density of MEH-PPV∕PbSe photodetectors with (circles), (upward triangles), (downward triangles), of MEH-PPV (diamonds), and pure MEH-PPV (squares) under the illumination with monochromator light with a power density of . The dark current (solid line) for all devices is similar and . Inset: Photocurrent density for devices with (dark squares), (dark triangles), (dark circles), of MEH-PPV (open squares), and dark current (solid line).
Comparison of external quantum efficiencies of the MEH-PPV∕PbSe QD photodetectors at : pure MEH-PPV (squares), MEH-PPV∕PbSe (triangles), and MEH-PPV∕PbSe (circles). Inset: UV-visible absorption spectrum of MEH-PPV:PbSe blended films on glass slides with (dots), (dashed line), pure MEH-PPV film (solid line), and PbSe QDs in solution (dash-dot line).
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