Fig. 3: Spectroscopy and carrier dynamic studies of the CQD solids impacted by ambient water.
From: The effect of water on colloidal quantum dot solar cells
a The absorbance, steady-state photoluminescence (PL) spectra of PbS-I CQD films prepared by spin coating and CA under different humidity. b The change of absorbance and PL spectra of spin-coated PbS-I CQD films versus heating time under dry and humid air. c Pseudo-color TA spectra of PbS-I CQD films by spin coating and CA. The color scales for a spin and CA films are the same and proportional to the absorption change in each graph. All samples were pumped by 470 nm laser pulse with the pump flux of 25 J·cm−2. d Transient PL decay of CQD films; inset table: the fast and slow time component fitted by double-exponential function.
