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Title: Building intermixed donor–acceptor architectures for water-processable organic photovoltaics

Journal Article · · Physical Chemistry Chemical Physics. PCCP
DOI:https://doi.org/10.1039/c8cp07137c· OSTI ID:1603507
 [1]; ORCiD logo [1]; ORCiD logo [2];  [3];  [1];  [1];  [1];  [1]; ORCiD logo [4]; ORCiD logo [5];  [3]; ORCiD logo [3];  [1];  [1]
  1. Univ. of Newcastle, Callaghan, NSW (Australia). Centre for Organic Electronics
  2. Flinders Univ., Adelaide, SA (Australia). Flinders Inst. for Nanoscale Science and Technology; Univ. of Bordeaux (France). Lab. de Chimie des Polymères Organiques (LCPO)
  3. Flinders Univ., Adelaide, SA (Australia). Flinders Inst. for Nanoscale Science and Technology
  4. Univ. of Newcastle, Callaghan, NSW (Australia). Centre for Organic Electronics; CSIRO Energy Centre, Mayfield West, NSW (Australia)
  5. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)

A modified synthesis method for aqueous nanoparticle printing inks, based upon vacuum-assisted solvent removal, is reported. Poly(3-hexylthiophene):phenyl C61 butyric acid methyl ester nanoparticle inks were prepared via this modified miniemulsion method, leading to both an improvement in photoactive layer morphology and a substantial reduction in the ink fabrication time. A combination of UV-visible spectroscopy, photoluminescence spectroscopy and scanning transmission X-ray microscopy measurements revealed a nanoparticle morphology comprising highly intermixed donor–acceptor domains. Consistent with these measurements, dynamic mechanical thermal analysis of the nanoparticles showed a glass transition temperature (Tg) of 104 °C, rather than a pure polymer phase or pure fullerene phase Tg. Together the spectroscopy, microscopy and thermomechanical data indicate that rapid solvent removal generates a more blended nanoparticle morphology. As such, this study highlights a new experimental lever for optimising nanostructure in the photoactive layer of nanoparticulate organic photovoltaic devices by enabling highly intermixed donor–acceptor architectures to be built from customised nanoparticulate inks.

Research Organization:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); Australian Research Council (ARC)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1603507
Journal Information:
Physical Chemistry Chemical Physics. PCCP, Vol. 21, Issue 10; ISSN 1463-9076
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 19 works
Citation information provided by
Web of Science

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Cited By (2)

Green-solvent-processable strategies for achieving large-scale manufacture of organic photovoltaics journal January 2019
Manipulating nanoscale structure to control functionality in printed organic photovoltaic, transistor and bioelectronic devices journal December 2019