Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.13/925456
- Role of solvent trapping effects in determining the structure and morphology of ternary blend organic devices
Burke, Kerry B.;
Belcher, Warwick J.;
McNeill, Christopher R.;
Dastoor, Paul C.
- The University of Newcastle. Faculty of Science & Information Technology, School of Mathematical and Physical Sciences
- We present results of scanning transmission X-ray microscopy (STXM) measurements of bulk heterojunction organic solar cells built from a ternary blend of poly(3-hexylthiophene) (P3HT), [6,6]-phenyl- C61-butyric acid methyl ester (PCBM), and [2,3,12,13-tetracyano-5,10,15,20-tetrakis(3,5-di-tert-butylphenyl)porphyrinato] copper(II) (Cu(CN)₄P) porphyrin. These results show evidence of solvent trapping due to porphyrin in the film. Upon annealing, submicrometer depressions are observed in the ternary blend films, corresponding to the evolution of solvent that is associated with the small porphyrin aggregates that phase segregate in the middle of the depressions. The areal density and size of the depressions change systematically with porphyrin concentration in the ternary blend. The relationship of the observed morphologies to the previously measured device performance is discussed.
- Macromolecules Vol. 42, Issue 8, p. 3098-3103
- Publisher Link
- American Chemical Society
transmission X-ray microscopy
- Resource Type
- journal article