Control of Shell Morphology in p–n Heterostructured Water-Processable Semiconductor Colloids: Toward Extremely Efficient Charge Separation

Yu Jin Kim, Richard D. Schaller, Harry Christopher Fry

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

This article describes p–n heterostructured water-borne semiconductor naonoparticles (NPs) with unique surface structures via control of shell morphology. The shell particles, comprising PC60–[6,6]-phenyl-C61-butyric acid methyl ester (PC61BM) composite, having n-type semiconductor characteristics, notably influence the charge carrier behavior in the core–shell NPs. A one- or two-phase methodology based on a PC60 surfactant-water phase and PC61BM n-type semiconductor-organic phase provides highly specific control over the shell structure of the NPs, which promote their superior charge separation ability when combined with poly-3-hexyl-thiophene (P3HT). Moreover, the resulting water-borne NP exhibits shell morphology-dependent carrier quenching and stability, which is characterized via luminescence studies paired with structural analysis. Corresponding to the results, outstanding performances of photovoltaic cells with over 5% efficiency are achieved. The results suggest that the surrounding shell environments, such as the shell structure, and its electronic charge density, are crucial in determining the overall activity of the core–shell p–n heterostructured NPs. Thus, this work provides a new protocol in the current fields of water-based organic semiconductor colloids.

Original languageEnglish
Article number1803563
JournalSmall
Volume15
Issue number2
DOIs
Publication statusPublished - Jan 11 2019

Keywords

  • charge separation
  • organic semiconducting nanoparticles
  • p–n heterostructure
  • water-borne colloids
  • water-processable nanoparticles

ASJC Scopus subject areas

  • Biotechnology
  • Biomaterials
  • Chemistry(all)
  • Materials Science(all)
  • Engineering (miscellaneous)

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