A Method to Describe the Shapes of UV-vis Absorbance Spectra During the Aggregation Process of Conjugated Polymer Solutions Quantitatively

Abstract We have defined a dimensionless parameter called shape quality factor to describe shapes of UV–vis absorbance spectra during aggregation process of conjugated polymer solutions quantitatively. Time-lapse UV–vis absorbance spectra of poly(3-hexylselenophene) (P3HS) solutions are obtained. Shape quality factors of UV–vis absorbance spectra during the aggregation process of P3HS solutions are calculated. Shape quality factors usually decrease during aggregation process when amount of aggregate is small, and increase when amount of aggregate is large. Relationship between shape quality factor and aggregation time can be fitted by double Gaussian functions. This work provides a simple way to describe shapes of UV–vis absorbance spectra of conjugated polymer solutions quantitatively.