High-efficiency silicon-compatible photodetectors based on Ge quantum dots

Isodiana Crupi, Pei Liu, Cosentino, Terrasi, Son T. Le, Lee, Maria Miritello, Isodiana Crupi, Pacifici, Paine, Zaslavsky, Mirabella

Risultato della ricerca: Articlepeer review

50 Citazioni (Scopus)

Abstract

We report on high responsivity, broadband metal/insulator/semiconductor photodetectors with amorphous Ge quantum dots (a-Ge QDs) as the active absorbers embedded in a silicon dioxide matrix. Spectral responsivities between 1-4 A/W are achieved in the 500-900 nm wavelength range with internal quantum efficiencies (IQEs) as high as ∼700%. We investigate the role of a-Ge QDs in the photocurrent generation and explain the high IQE as a result of transport mechanisms via photoexcited QDs. These results suggest that a-Ge QDs are promising for high-performance integrated optoelectronic devices that are fully compatible with silicon technology in terms of fabrication and thermal budget. © 2011 American Institute of Physics.
Lingua originaleEnglish
Numero di pagine3
RivistaApplied Physics Letters
Volume98
Stato di pubblicazionePublished - 2011

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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