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Figure 3

From: Schottky solar cell using few-layered transition metal dichalcogenides toward large-scale fabrication of semitransparent and flexible power generator

Figure 3

Photovoltaic features of a high-performance few-layered WSe2 solar cell. (a,b) (a) I sc and (b) normalized PCE for different L ele. I sc in (a) was normalized by each sample area. (c–e) Typical (c) low- and (d) high-magnification optical microscope images and (e) I ds − V ds curves without light irradiation of a suspended WSe2 device with asymmetric electrodes. Green curve in (e) shows the fitting curve for the diode equation. (f,g) (f) I ds and (g) normalized PCE of a suspended TMD device as a function of V gs. (h) Typical I ds − V ds curves of a suspended TMD device under light irradiation with a solar simulator. (i) Plots of PCE vs. ΔWF of various TMD solar cell devices, where (i)–(iv) denotes (i) a symmetric electrode (Ti-Ti) with long L ele, (ii) a Pd-Ni electrode with long L ele, (iii) a Pd-Ni electrode with short L ele, and (iv) a Pd-Ni electrode with suspended TMD, respectively.

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