2 January 2015 Deconvoluting contributions of photoexcited species in polymer-quantum dot hybrid photovoltaic materials
Author Affiliations +
Abstract
Ultrafast transient absorption spectroscopy is used in conjunction with spectroelectrochemistry and chemical doping experiments to study the photogeneration of charges in hybrid bulk heterojunction (BHJ) thin films composed of poly[2,6-(4,4-bis(2-ethylhexyl)-4H-cyclopenta[2,1-b:3,4-b′]-dithiophene)-alt-4,7-(2,1,3-benzothiadiazole)] (PCPDTBT) and CdSe nanocrystals. Chemical doping experiments on hybrid and neat PCPDTBT:CdSe thin films are used to deconvolute the spectral signatures of the transient states in the near infrared. We confirm the formation and assignment of oxidized species in chemical doping experiments by comparing the spectral data to that from spectroelectrochemical measurements on hybrid and neat PCPDTBT:CdSe BHJ thin films. The deconvolution procedure allows extraction of the polaron populations in the neat polymer and hybrid thin films.
© 2015 Society of Photo-Optical Instrumentation Engineers (SPIE)
Elsa Couderc, Elsa Couderc, Matthew J. Greaney, Matthew J. Greaney, William Thornbury, William Thornbury, Richard L. Brutchey, Richard L. Brutchey, Stephen E. Bradforth, Stephen E. Bradforth, } "Deconvoluting contributions of photoexcited species in polymer-quantum dot hybrid photovoltaic materials," Journal of Photonics for Energy 5(1), 057404 (2 January 2015). https://doi.org/10.1117/1.JPE.5.057404 . Submission:
JOURNAL ARTICLE
10 PAGES


SHARE
Back to Top