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Schematic diagrams of the -GaAs region for (a) WLSC-1, (b) QDSC-1, and (c) QDSC-2. AFM images of the QDs used in (d) QDSC-1 and (e) QDSC-2. Height contrast is 10 nm. (f) RT PL spectra of WLSC-1 (gray curve, ), QDSC-1 (orange curve, ), and QDSC-2 (red curve, ).
(a) External quantum efficiency (EQE) and (b) one- sun characteristics of the baseline SC (dashed black curve), WLSC-1 (gray curve, , , QDSC-1 (orange curve, , ), and QDSC-2 (red curve, , ). Because the characteristics of WLSC-1 and QDSC-1 are similar (see Table I), only QDSC-1 is shown in (b) for sake of clarity.
(a) Schematic diagram of the -GaAs region for QDSC-3 and QDSC-4. (b) X-SEM image of the QD region of QDSC-4. (c) EQE of the baseline SC (dashed black curve), WLSC-2 (gray curve, ), QDSC-3 (blue curve, ), and QDSC-4 (green curve, ). The inset in (c) shows the RT PL spectrum of QDSC-3.
Open circuit voltage , short circuit densities , FF, and efficiency for baseline, WL-, and QD-SCs under 1 sun illumination. The excitonic GS emission wavelength of the quantum material and the SL thickness are also presented.
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