Document Server@UHasselt >
Research publications >
Please use this identifier to cite or link to this item:
|Title: ||The effect of side-chain substitution and hot processing on diketopyrrolopyrrole-based polymers for organic solar cells|
|Authors: ||Heintges, Gael H. L.|
Leenaers, Pieter J.
Janssen, Rene A. J.
|Issue Date: ||2017|
|Publisher: ||ROYAL SOC CHEMISTRY|
|Citation: ||JOURNAL OF MATERIALS CHEMISTRY A, 5(26), p. 13748-13756|
|Abstract: ||The effects of cold and hot processing on the performance of polymer-fullerene solar cells are investigated for diketopyrrolopyrrole (DPP) based polymers that were specifically designed and synthesized to exhibit a strong temperature-dependent aggregation in solution. The polymers, consisting of alternating DPP and oligothiophene units, are substituted with linear and second position branched alkyl side chains. For the polymer-fullerene blends that can be processed at room temperature, hot processing does not enhance the power conversion efficiencies compared to cold processing because the increased solubility at elevated temperatures results in the formation of wider polymer fibres that reduce charge generation. Instead, hot processing seems to be advantageous when cold processing is not possible due to a limited solubility at room temperature. The resulting morphologies are consistent with a nucleation-growth mechanism for polymer fibres during drying of the films.|
|Notes: ||[Heintges, Gael H. L.; Leenaers, Pieter J.; Janssen, Rene A. J.] Eindhoven Univ Technol, Inst Complex Mol Syst, Mol Mat & Nanosyst, POB 513, NL-5600 MB Eindhoven, Netherlands. [Heintges, Gael H. L.] Hasselt Univ, Inst Mat Res IMO IMOMEC, DSOS, B-3590 Diepenbeek, Belgium. [Janssen, Rene A. J.] Dutch Inst Fundamental Energy Res, De Zaale 20, NL-5612 AJ Eindhoven, Netherlands.|
|ISI #: ||000404618200051|
|Type: ||Journal Contribution|
|Appears in Collections: ||Research publications|
Files in This Item:
|Published version||1.28 MB||Adobe PDF|
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.