Impact of 1,8-diiodooctane on the morphology of organic photovoltaic (OPV) devices - A Small Angle Neutron Scattering (SANS) study

• Type: Article in International Scientific Journal
• Date: 2020

Authors

Bernardo, G (Author) FEUP; Gaspar, H (Author) Other; Perez, GE (Author) Other; Shackleford, ASD (Author) Other; Parnell, AJ (Author) Other; Bleuel, M (Author) Other; Adélio Mendes (Author) FEUP; King, SM (Author) Other; Parnell, SR (Author) Other

Journal

Title: Polymer Testing

Vol. 82

ISSN: 0142-9418

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 0 Citations

Scopus - 3 Citations

Other information

Authenticus ID: P-00R-GF3

DOI: 10.1016/j.polymertesting.2019.106305

Abstract (EN): The impact of the additive 1,8-diiodooctane on the morphology of bulk-heterojunction solar cells based on the systems P3HT:PC71BM, PTB7:PC71BM and PTB7-Th:PC71BM is studied using a combination of Small Angle Neutron Scattering (SANS) and Atomic Force Microscopy (AFM). The results clearly show that while in the P3HT:PC71BM system, the additive DIO promotes a slight coarsening of the phase domains (type I additive), in the systems PTB7:PC71BM and PTB7-Th:PC71BM, DIO promotes a large decrease in the size of the phase domains (type II additive). SANS is demonstrated as being particularly useful at detecting the minor morphological changes observed in the P3HT:PC71BM system, which can be hardly seen in AFM. This work illustrates how SANS complements AFM and both techniques when used together provide a deeper insight into the nanoscale structure in thin organic photovoltaic (OPV) device films.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 9