Relating nanoscale structure to optoelectronic functionality in multiphase donor–acceptor nanoparticles for printed electronics applications. (December 2020)

• Record Type: Journal Article
• Authors: Al-Mudhaffer, Mohammed F.; Holmes, Natalie P.; Kumar, Pankaj; Barr, Matthew G.; Cottam, Sophie; Crovador, Rafael; Jones, Timothy W.; Lim, Rebecca; Zhou, Xiaojing; Holdsworth, John; Belcher, Warwick J.; Dastoor, Paul C.; Griffith, Matthew J.
• Is Part Of: MRS communications. Volume 10:Number 4(2020)
• Page Start: 600
• Page End: 608
• Publication Date: 2020-12
• Subjects: Materials -- Periodicals; 620.11
• DOI: 10.1557/mrc.2020.76
• Languages: English
• ISSNs: 2159-6859

Abstract

Abstract: Abstract : This work investigated the photophysical pathways for light absorption, charge generation, and charge separation in donor–acceptor nanoparticle blends of poly(3-hexylthiophene) and indene-C60 -bisadduct. Optical modeling combined with steady-state and time-resolved optoelectronic characterization revealed that the nanoparticle blends experience a photocurrent limited to 60% of a bulk solution mixture. This discrepancy resulted from imperfect free charge generation inside the nanoparticles. High-resolution transmission electron microscopy and chemically resolved X-ray mapping showed that enhanced miscibility of materials did improve the donor–acceptor blending at the center of the nanoparticles; however, a residual shell of almost pure donor still restricted energy generation from these nanoparticles.