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Effects of thermally cross-linkable polymeric additive in the photoactive layer of polymer solar cells
- Source :
- Organic Electronics. 67:128-135
- Publication Year :
- 2019
- Publisher :
- Elsevier BV, 2019.
-
Abstract
- Performance and stability are the most important issues to be considered to propel and advance the polymer solar cell (PSC) technology to be realized in commercial market. Herein, we propose a new concept of stabilizing polymer-fullerene morphology for PSCs and simultaneously improve device performance by introducing thermally cross-linkable polymer as an additive in the photoactive layer. The cross-linker, poly[9,9-bis(6-(N,N-diethylamino)propyl)-fluorene-alt-9,9-bis(3-ethyl(oxetane-3-ethyloxy)hexyl)-fluorene] (PFN-ox), forms a three-dimensional network embedded in the polymer blend after thermal treatment and plays various roles including reducing the carrier recombination at the donor/acceptor interface, improving the electrical property of PSCs, enhancing the hydrophobicity of the photoactive layer, slightly decreasing fullerene domain size, and retarding the crystal growth of fullerenes. Those characteristics lead to the improvement of device performance from the moderate improved fill factor and stable device operation under ambient condition (>85% efficiency retention after 2 months). The stability effects of PFN-ox are not only valid in polymer-fullerene blends, but also in polymer-polymer systems, showing its general characteristics. We believe that our finding can advance the development of stable PSCs and other optoelectronic devices based on organic materials.
- Subjects :
- chemistry.chemical_classification
Materials science
Fullerene
Crystal growth
02 engineering and technology
General Chemistry
Thermal treatment
Polymer
010402 general chemistry
021001 nanoscience & nanotechnology
Condensed Matter Physics
01 natural sciences
Acceptor
Polymer solar cell
0104 chemical sciences
Electronic, Optical and Magnetic Materials
Biomaterials
Photoactive layer
Chemical engineering
chemistry
Materials Chemistry
Polymer blend
Electrical and Electronic Engineering
0210 nano-technology
Subjects
Details
- ISSN :
- 15661199
- Volume :
- 67
- Database :
- OpenAIRE
- Journal :
- Organic Electronics
- Accession number :
- edsair.doi...........d1bf291c8a87e0beeb5ad027110079b9