Bulletin of the American Physical Society
2023 APS March Meeting
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session Q33: Organic Optoelectronic Devices: Design and Performance
3:00 PM–5:48 PM,
Wednesday, March 8, 2023
Room: Room 225
Sponsoring
Units:
DPOLY DSOFT DMP FIAP
Chair: Kyungtae Kim, Los Alamos National Laboratory
Abstract: Q33.00008 : Extending the measurement of domain purity in organic photovoltaic blends
4:48 PM–5:00 PM
Presenter:
Peter Dudenas
(NIST)
Authors:
Peter Dudenas
(NIST)
Yilei Wu
(Stanford University)
Sebastian Scneider
(Stanford University)
Christina Cheng
(Stanford University)
Michael F Toney
(University of Colorado, Boulder)
Alberto Salleo
(Stanford University)
Zhenan Bao
(Stanford University)
Dean M DeLongchamp
(National Institute of Standards and Tech)
In this presentation we will describe our efforts to deconvolute contributions from compositional heterogeneity and orientational heterogeneity in the RSoXS phase purity measurment. Using CyRSoXS, a GPU-accelerated voxel-based RSoXS simulator, we demonstrate the impact of molecular orientation and film surface roughness on the results of the conventional RSoXS domain size / phase purity assessment. This framework is validated using a synthetic model system, and then applied to an all-polymer OPV blend system to quantify the relative contributions of compositional, orientational, and vacuum scattering. We discuss these results in the context of developing more robust structure-property relationships: by isolating compositional and orientational aspects of morphology, both of which affect charge transport and recombination, we can accelerate the optimization of OPV blends for next generation organic electronics.
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