Fig. 3: Optical and photocatalytic properties of CZTS nanocrystals. | Nature Communications

Fig. 3: Optical and photocatalytic properties of CZTS nanocrystals.

From: A library of polytypic copper-based quaternary sulfide nanocrystals enables efficient solar-to-hydrogen conversion

Fig. 3

a UV-Vis-IR absorption spectra of the obtained polytypic and phase-pure CZTS nanocrystals. the insert shows the graph of linear extrapolation of (αhυ)2 versus photon energy (hυ). b Photocatalytic hydrogen evolution rates of the obtained polytypic and phase-pure CZTS nanocrystals at room temperature under visible light (λ > 420 nm). c Cycles running of the polytypic CZTS nanocrystals for photocatalytic hydrogen evolution. After every 4 h, the produced hydrogen is evacuated. d The calculation Density of States of WZ and KS phases in the polytypic structures. e The bandgap alignments of polytypic nanocrystals. f The simulated charge distributions of the new hybrid combination.

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