Nano-pathways: bridging the divide between water-processable nanoparticulate and bulk heterojunction organic photovoltaics

Holmes, Natalie P., Marks, Melissa, Kumar, Pankaj, Kroon, Renee, Barr, Matthew G., Nicolaidis, Nicolas, Feron, Krishna, Pivrikas, Almantas, Fahy, Adam, Mendaza, Amaia Diaz de Zerio, Kilcoyne, A. L. David, Muller, Christian, Zhou, Xiaojing, Andersson, Mats R., Dastoor, Paul C. and Belcher, Warwick J. (2016) Nano-pathways: bridging the divide between water-processable nanoparticulate and bulk heterojunction organic photovoltaics. Nano Energy, 19 495-510. doi:10.1016/j.nanoen.2015.11.021


Author Holmes, Natalie P.
Marks, Melissa
Kumar, Pankaj
Kroon, Renee
Barr, Matthew G.
Nicolaidis, Nicolas
Feron, Krishna
Pivrikas, Almantas
Fahy, Adam
Mendaza, Amaia Diaz de Zerio
Kilcoyne, A. L. David
Muller, Christian
Zhou, Xiaojing
Andersson, Mats R.
Dastoor, Paul C.
Belcher, Warwick J.
Title Nano-pathways: bridging the divide between water-processable nanoparticulate and bulk heterojunction organic photovoltaics
Journal name Nano Energy
ISSN 2211-2855
Publication date 2016-01-01
Year available 2015
Sub-type Article (original research)
DOI 10.1016/j.nanoen.2015.11.021
Open Access Status Not Open Access
Volume 19
Start page 495
End page 510
Total pages 16
Place of publication Amsterdam, Netherlands
Publisher Elsevier BV
Collection year 2017
Language eng
Formatted abstract
Here we report the application of a conjugated copolymer based on thiophene and quinoxaline units, namely poly[2,3-bis-(3-octyloxyphenyl)quinoxaline-5,8-diyl-alt-thiophene-2,5-diyl] (TQ1), to nanoparticle organic photovoltaics (NP-OPVs). TQ1 exhibits more desirable material properties for NP-OPV fabrication and operation, particularly a high glass transition temperature (Tg) and amorphous nature, compared to the commonly applied semicrystalline polymer poly(3-hexylthiophene) (P3HT). This study reports the optimisation of TQ1:PC71BM (phenyl C71 butyric acid methyl ester) NP-OPV device performance by the application of mild thermal annealing treatments in the range of the Tg (sub-Tg and post-Tg), both in the active layer drying stage and post-cathode deposition annealing stage of device fabrication, and an in-depth study of the effect of these treatments on nanoparticle film morphology. In addition, we report a type of morphological evolution in nanoparticle films for OPV active layers that has not previously been observed, that of PC71BM nano-pathway formation between dispersed PC71BM-rich nanoparticle cores, which have the benefit of making the bulk film more conducive to charge percolation and extraction.
Keyword Blend morphology
Glass transition temperature
Nanoparticle
Organic photovoltaic
Scanning transmission X-ray microscopy
Water processable solar cells
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mathematics and Physics
HERDC Pre-Audit
School of Chemistry and Molecular Biosciences
 
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