Title

Charge Trapping And Storage By Composite P3Ht/Pc 60Bm Nanoparticles Investigated By Fluorescence-Voltage/Single Particle Spectroscopy

Abstract

Fluorescence-voltage/single particle spectroscopy (F-V/SPS) was employed to study exciton-hole polaron interactions and interfacial charge transfer processes for pure poly(3-hexylthiophene) (P3HT) nanoparticles (NPs) and composite P3HT/PC 60BM NPs in functioning hole-injection devices. F-V/SPS data collected on a particle-by-particle basis reveal an apparent bistability in the fluorescence-voltage modulation curves for composite NPs of P3HT and [6,6]-phenyl-C 61-butyric acid methyl ester (PC 60BM) that is absent for pure P3HT NPs. A pronounced deep trapping of free electrons photogenerated from the composite P3HT/PC 60BM NPs at the NP/dielectric interface and hole trapping by fullerene anions in composite P3HT/PC 60BM NPs under photoexcitation lies at the basis of this finding. The deep electron trapping effect reported here for composite conjugated polymer/fullerene NPs presents an opportunity for future application of these NPs in nanoscale memory and imaging devices. © 2011 American Chemical Society.

Publication Date

12-28-2011

Publication Title

Journal of the American Chemical Society

Volume

133

Issue

51

Number of Pages

20850-20856

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1021/ja207244z

Socpus ID

84555187176 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84555187176

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