A synergistic assembly of nanoscale lamellar photoconductor hybrids

Marina Sofos, Joshua Goldberger, David A. Stone, Jonathan E. Allen, Qing Ma, David J. Herman, Wei Wen Tsai, Lincoln J. Lauhon, Samuel I. Stupp

Research output: Contribution to journalArticlepeer-review

155 Citations (Scopus)


Highly ordered nanostructured organic/inorganic hybrids offer chemical tunability, novel functionalities and enhanced performance over their individual components. Hybrids of complementary p-type organic and n-type inorganic components have attracted interest in optoelectronics, where high-efficiency devices with minimal cost are desired. We demonstrate here self-assembly of a lamellar hybrid containing periodic and alternating 1-nm-thick sheets of polycrystalline ZnO separated by 2-3 nm layers of conjugated molecules, directly onto an electrode. Initially the electrodeposited inorganic is Zn(OH) 2, but π-π interactions among conjugated molecules stabilize synergistically the periodic nanostructure as it converts to ZnO at 150 ° C. As photoconductors, normalized detectivities (D *) greater than 2×10 10 Jones, photocurrent gains of 120 at 1.2 V μm -1 and dynamic ranges greater than 60 dB are observed on selective excitation of the organic. These are among the highest values measured for organic, hybrid and amorphous silicon, making them technologically competitive as low-power, wavelength-tunable, flexible and environmentally benign photoconductors.

Original languageEnglish
Pages (from-to)68-75
Number of pages8
JournalNature materials
Issue number1
Publication statusPublished - Jan 2009

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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