Playing with dimensions: Rational design for heteroepitaxial p-n junctions

Tae Il Lee, Sang Hoon Lee, Young Dong Kim, Woo Soon Jang, Jin Young Oh, Hong Koo Baik, Catherine Stampfl, Aloysius Soon, Jae Min Myoung

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

A design for a heteroepitaxial junction by the way of one-dimensional wurzite on a two-dimensional spinel structure in a low-temperature solution process was introduced, and it's capability was confirmed by successful fabrication of a diode consisting of p-type cobalt oxide (Co 3O 4) nanoplate/n-type zinc oxide (ZnO) nanorods, showing reasonable electrical performance. During thermal decomposition, the 30° rotated lattice orientation of Co 3O 4 nanoplates from the orientation of β-Co(OH) 2 nanoplates was directly observed using high-resolution transmission electron microscopy. The epitaxial relations and the surface stress-induced ZnO nanowire growth on Co 3O 4 were well supported using the first-principles calculations. Over the large area, (0001) preferred oriented ZnO nanorods epitaxially grown on the (111) plane of Co 3O 4 nanoplates were experimentally obtained. Using this epitaxial p-n junction, a diode was fabricated. The ideality factor, turn-on voltage, and rectifying ratio of the diode were measured to be 2.38, 2.5 V and 10 4, respectively.

Original languageEnglish
Pages (from-to)68-76
Number of pages9
JournalNano letters
Volume12
Issue number1
DOIs
Publication statusPublished - 2012 Jan 11

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All Science Journal Classification (ASJC) codes

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

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