Fig. 4: Optical properties and energy band structures corresponding to the SC-1 to SC-2 transition process. | Nature Communications

Fig. 4: Optical properties and energy band structures corresponding to the SC-1 to SC-2 transition process.

From: Photo-controlled vacancies and conductivity within single crystals of silver chalcogenolate cluster-based MOFs

Fig. 4

a Solid-state absorption spectra of SC-1 crystallites before and after UV treatment (insert: crystallographic contrast of fresh crystals and after UV treatment for 10 min); the pink region represents the change in Solid-state absorption spectrum during the transition from SC-1 to SC-2. b Fluorescence spectrum before and after UV treatment for 5 min and 10 min (insert: crystallographic contrast of fresh crystals and after UV treatment for 5 min and 10 min) the blue and pink regions indicate the intensity reduction of fluorescence during 5 min and 10 min, respectively. c Infrared spectra of SC-1 before and after UV treatment for 2 h. d PXRD pattern of time-dependent UV treatment. e UV-Vis diffuse reflectance spectra of SC-1 under different UV irradiation times at room temperature. f Tauc plot displaying the indirect band gap of SC-1 and SC-2. g Raman spectra of pristine and as the UV irradiation time increases, demonstrate that the band structure changes during this process. h The valence band, conduction band, and band gap schematic diagram changes before and after UV treatment. VB1/HOMO = 2.35 eV; VB2/HOMO = 2.64 eV; Eg1 = 1.92 eV; Eg2 = 0.57 eV, and the resulting position of the conduction band are respectively CB1 = 4.27 eV and CB2 = 3.21 eV.

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