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Enhanced performance of hybrid solar cells using longer arms of quantum cadmium selenide tetrapods
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View: Figures


Image of FIG. 1.
FIG. 1.

(Color online) (a) Schematic diagram of device structure and cross-sectional TEM images of hybrid solar cells having (b) Long-armed and (c) Short-armed CdSe TPs:P3HT photoactive layer.

Image of FIG. 2.
FIG. 2.

(Color online) Current density-voltage (J-V) characteristics of CdSe TPs (90 wt. %):P3HT (10 wt. %) hybrid solar cells (long-armed TPs: black solid line with circles and short-armed TPs: red dotted line with squares). Device parameters are shown in inset.

Image of FIG. 3.
FIG. 3.

(Color online) HREM cross-sectional images (500 kX) of (a) Long (ca. 4 nm× 10 nm) and (b) Short (ca. 4.5 nm× 5 nm) CdSe TPs:P3HT photoactive blends. The insets of (a) and (b) show the schematic illustrations of long and short TPs in P3HT matrix.

Image of FIG. 4.
FIG. 4.

(Color online) (a) Absorption spectra of blends of CdSe TPs (90 wt. %) and P3HT (10 wt. %). (b) Normalized absorption in blends of long/short TPs:P3HT, P3HT (blue dashed line), and pristine long/short TPs (black solid line/red dotted line). (c) External (EQEs) and (d) IQEs of devices based on CdSe TPs (90 wt. %) and P3HT (10 wt. %). (Black solid line with circles is for long TPs, where red dotted line with squares is for short TPs:P3HT blends.)


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Scitation: Enhanced performance of hybrid solar cells using longer arms of quantum cadmium selenide tetrapods