Tackling P3HT:Y-Series Miscibility Through Advanced Processing for Tunable Aggregation

Title data

Eller, Fabian ; McNeill, Christopher R. ; Herzig, Eva M.:
Tackling P3HT:Y-Series Miscibility Through Advanced Processing for Tunable Aggregation.
In: Advanced Energy Materials. Vol. 14 (2024) Issue 29 . - 2304455.
ISSN 1614-6840
DOI: https://doi.org/10.1002/aenm.202304455

Official URL:

Abstract in another language

Polymer and small molecule blend thin films are of strong interest for organic electronics and particularly organic solar cells. The high miscibility in blends of ordinary P3HT and state-of-the-art Y-series non-fullerene acceptors (NFAs) suppresses phase separation and aggregation challenging successful charge separation and transport. In a recent work, current-induced doping (CID) is introduced, a method to precisely control the aggregation of Poly(3-hexylthiophene) (P3HT) in solution. The highly ordered pre-aggregation in solution is used here to control the P3HT aggregation in neat films and blends with Y12 (BTP-4F-12). This results in a 25-fold increase in hole mobility in P3HT organic field-effect transistor (OFET) devices and tunability of the P3HT aggregate quality in the presence of Y12 over large ranges. At the same time, particularly the Y12 long-range ordering is heavily suppressed by increasing P3HT aggregation. However, solvent vapor annealing (SVA) leads to an extraordinarily high Y12 ordering, changes in the crystal orientation of Y12, and a further improvement of P3HT aggregation. A broad range of different degrees of aggregation of both materials can therefore be obtained in the final thin films solely by changing processing parameters without changing the composition of the material system.

Further data

Item Type:	Article in a journal
Refereed:	Yes
Keywords:	current induced doping; GIWAXS; morphology; nanostructure; NFA; solvent vapor annealing; UV–vis spectroscopy
Institutions of the University:	Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Professor Experimental Physics VII - Dynamics and Structure Formation Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Professor Experimental Physics VII - Dynamics and Structure Formation > Professor Experimental Physics VII - Dynamics and Structure Formation - Univ.-Prof. Dr. Eva M. Herzig Faculties Faculties > Faculty of Mathematics, Physics und Computer Science
Result of work at the UBT:	Yes
DDC Subjects:	500 Science > 530 Physics
Date Deposited:	20 Jun 2024 05:20
Last Modified:	07 Oct 2024 06:22
URI:	https://eref.uni-bayreuth.de/id/eprint/89796