Influence of pH on the quantum-size-controlled photoelectrochemical etching of epitaxial InGaN quantum dots
Journal Article
·
· Journal of Physical Chemistry. C
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Illumination by a narrow-band laser has been shown to enable photoelectrochemical (PEC) etching of InGaN thin films into quantum dots with sizes controlled by the laser wavelength. Here, we investigate and elucidate the influence of solution pH on such quantum-size-controlled PEC etch process. We find that although a pH above 5 is often used for PEC etching of GaN-based materials, oxides (In2O3 and/or Ga2O3) form which interfere with quantum dot formation. Furthermore, at pH below 3, however, oxide-free QDs with self-terminated sizes can be successfully realized.
- Research Organization:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Energy Frontier Research Centers (EFRC) (United States). EFRC for Solid State Lighting Science (SSLS)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- AC04-94AL85000
- OSTI ID:
- 1238656
- Report Number(s):
- SAND-2015-9888J; 607996
- Journal Information:
- Journal of Physical Chemistry. C, Vol. 119, Issue 50; ISSN 1932-7447
- Publisher:
- American Chemical SocietyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Cited by: 9 works
Citation information provided by
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