Jump to main content
Jump to site search

Issue 14, 2014
Previous Article Next Article

Efficiency limitations in a low band-gap diketopyrrolopyrrole-based polymer solar cell

Author affiliations

Abstract

We report the performance and photophysics of a low band-gap diketopyrrolopyrrole-based copolymer used in bulk heterojunction devices in combination with PC71BM. We show that the short lifetime of photogenerated excitons in the polymer constitutes an obstacle towards device efficiency by limiting the diffusion range of the exciton to the donor–acceptor heterojunction. We employ ultrafast transient-probe and fluorescence spectroscopy techniques to examine the excited state loss channels inside the devices. We use the high boiling point solvent additive 1,8-diiodooctane (DIO) to study the photoexcited state losses in different blend morphologies. The solvent additive acts as a compatibiliser between the donor and the acceptor material and leads to smaller domain sizes, higher charge formation yields and increased device efficiency.

Graphical abstract: Efficiency limitations in a low band-gap diketopyrrolopyrrole-based polymer solar cell

Back to tab navigation

Supplementary files

Article information


Submitted
12 Dec 2013
Accepted
10 Feb 2014
First published
10 Feb 2014

Phys. Chem. Chem. Phys., 2014,16, 6743-6752
Article type
Paper
Author version available

Efficiency limitations in a low band-gap diketopyrrolopyrrole-based polymer solar cell

S. Albert-Seifried, D. Ko, S. Hüttner, C. Kanimozhi, S. Patil and R. H. Friend, Phys. Chem. Chem. Phys., 2014, 16, 6743
DOI: 10.1039/C4CP00485J

Social activity

Search articles by author

Spotlight

Advertisements