Electrodeposited cobalt-copper sulfide counter electrodes for highly efficient quantum dot sensitized solar cells

Fabrication of FeO@CuCo 2 S 4 multifunctional electrode for ultrahigh‐capacity supercapacitors and efficient oxygen evolution reaction

“…The CoS 2 spectrum shows two main peaks at around 329 and 352 cm −1 , which is associated with Co‐S vibration and a small hump at ~287 cm −1 corresponding to E g mode (sulphur dumbbells librational vibration) of the CoS 2 structure . An intense and broad vibrational peak centred at 474 cm −1 present in the CuS spectrum is associated with A 1g mode (symmetric stretching of S‐S ions at the 4e site), and the less intense peak at ~558 cm −1 could originate from 2LO (overtone longitudinal phonon) . The Raman spectrum of the CuCo 2 S 4 electrode film shows a total of four vibrational peaks at 267, 305, ~329, and ~352 cm −1 .…”

“…The Raman spectrum of the CuCo 2 S 4 electrode film shows a total of four vibrational peaks at 267, 305, ~329, and ~352 cm −1 . The peaks at 267 and 305 cm −1 are associated with the vibration of the Cu‐S and Cu‐S‐Cu bond, and the reaming two peaks are ascribed to Co‐S vibration, confirming the formation of CuCo 2 S 4 . Moreover, the FeO@CuCo 2 S 4 spectrum shows a total of six peaks, which is the combination of the FeO and CuCo 2 S 4 peaks .…”

“…The peaks at 267 and 305 cm −1 are associated with the vibration of the Cu-S and Cu-S-Cu bond, and the reaming two peaks are ascribed to Co-S vibration, confirming the formation of CuCo 2 S 4 . 57 Moreover, the FeO@CuCo 2 S 4 spectrum shows a total of six peaks, which is the combination of the FeO and CuCo 2 S 4 peaks. 54,58 In addition, the chemical composition (atomic%) of these films was evaluated using an EDS technique.…”

“…54,55 An intense and broad vibrational peak centred at 474 cm −1 present in the CuS spectrum is associated with A 1g mode (symmetric stretching of S-S ions at the 4e site), and the less intense peak at~558 cm −1 could originate from 2LO (overtone longitudinal phonon). 56,57 The Raman spectrum of the CuCo 2 S 4 electrode film shows a total of four vibrational peaks at 267, 305,~329, and~352 cm −1 . The peaks at 267 and 305 cm −1 are associated with the vibration of the Cu-S and Cu-S-Cu bond, and the reaming two peaks are ascribed to Co-S vibration, confirming the formation of CuCo 2 S 4 .…”

Optimizing photovoltaic performance in CuInS2 and CdS quantum dot-sensitized solar cells by using an agar-based gel polymer electrolyte

“…Another strategy to improve the photovoltaic performance is using another counter electrode such as CoS-CuS hybrid structure, which has been shown to obtain higher photovoltaic performance than bare CoS or CuS. 44 Stability aer storage Fig. S4 † compares the J-V curves and photocurrent stability of the solar cells employing CdS (being stored for 72 hours) and CuInS 2 (being stored for 120 hours), both with RGO/Cu 2 S as counter electrode.…”