Morphology and carrier non-geminate recombination dynamics regulated by solvent additive in polymer/fullerene solar cells.

ABSTRACT: In this study, PBDTTT-E (based on benzo [1,2-b:4,5-b'] dithiophene (BDT) and thieno [3,4-b] thiophene (TT)) as a donor and fullerene derivative PC₇₁BM (phenyl-C₇₁-butyric acid methyl ester) as an acceptor with and without 1,8-diiodooctane (DIO)-treated copolymer solar cells were investigated. The device based on PBDTTT-E with treated DIO showed remarkably high current density (J _sc), fill factor (FF) and similar open-circuit voltage (V _oc). Charge carrier lifetime (τ _n ), density (n) and non-geminate recombination rate (k _rec) in the photoactive layers were measured by employing transient photovoltage (TPV) and charge extraction (CE) techniques. Based on k _rec and <

SUBMITTER: Huo MM 

PROVIDER: S-EPMC9054697 | biostudies-literature | 2020 Jun

REPOSITORIES: biostudies-literature