- Title
- The effect of mesomorphology upon the performance of nanoparticulate organic photovoltaic devices
- Creator
- Dam, Henrik F.; Holmes, Natalie P.; Andersen, Thomas R.; Larsen-Olsen, Thue T.; Barr, Matthew; Kilcoyne, A. L. David; Zhou, Xiaojing; Dastoor, Paul C.; Krebs, Frederik C.; Belcher, Warwick J.
- Relation
- Solar Energy Materials and Solar Cells Vol. 138, Issue July 2015, p. 102-108
- Publisher Link
- http://dx.doi.org/10.1016/j.solmat.2015.02.028
- Publisher
- Elsevier
- Resource Type
- journal article
- Date
- 2015
- Description
- Scanning transmission X-ray microscopy (STXM) compositional mapping has been used to probe the mesomorphology of nanoparticles (NPs) synthesized from two very different polymer:fullerene blends: poly(3-hexylthiophene) (P3HT): phenyl-C61-butyric acid methyl ester (PCBM) and poly[4,8-bis(2-ethylhexyloxy)benzo(1,2-b:4,5-b')dithiophene-alt-5, 6-bis(octyloxy)-4,7-di(thiophen-2-yl)(2,1,3-benzothiadiazole)-5,5'-diyl] (PSBTBT): PCBM. The STXM data shows that both blends form core-shell NP structures with similar shell compositions, but with different polymer:fullerene ratios in the core regions. P3HT:PCBM and PSBTBT:PCBM NP organic photovoltaic (OPV) devices have been fabricated and exhibit similar device efficiencies, despite the PSBTBT being a much higher performing low band gap material. By comparing the measured NP shell and core compositions with the optimized bulk hetero-junction (BHJ) compositions, we show that the relatively higher performance of the P3HT:PCBM NP device arises from the fact that its shell composition is much closer to the optimal BHJ value than that of the PSBTBT:PCBM NP device.
- Subject
- nonparticle; morphology; organic photovoltaic
- Identifier
- http://hdl.handle.net/1959.13/1338210
- Identifier
- uon:27964
- Identifier
- ISSN:0927-0248
- Language
- eng
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