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  4. Towards SiC-Based VUV Pin-Photodiodes - Investigations on 4H-SiC Photodiodes with Shallow Implanted Al Emitters
 
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May 31, 2023
Journal Article
Title

Towards SiC-Based VUV Pin-Photodiodes - Investigations on 4H-SiC Photodiodes with Shallow Implanted Al Emitters

Abstract
4H-silicon carbide (SiC) based pin photodiodes with a sensitivity in the vacuum ultraviolet spectrum (VUV) demand newly developed emitter doping profiles. This work features the first ever reported 4H-SiC pin photodiodes with an implanted p-emitter and a noticeable sensitivity at a wavelength of 200 nm. As a first step, Aluminum doping profiles produced by low energy ion implantation in 4H-SiC were characterized by secondary-ion mass spectrometry (SIMS). Photodiodes using these shallow emitters are compared to one with a deep p-emitter doping profile employing IV characteristics and the spectral response. SIMS results demonstrate the possibility of shallow Al-implantation profiles using low implantation energies with all emitter profiles featuring characteristic I-V results. For some shallow doping profiles, a measurable signal at the upper limit of the VUV spectrum could be demonstrated, paving the way towards 4H-SiC pin photodiodes with sensitivities for wavelengths below 200 nm.
Author(s)
Schraml, Michael
Fraunhofer-Institut für Integrierte Systeme und Bauelementetechnologie IISB  
Papathanasiou, Niklas
May, Alexander  
Fraunhofer-Institut für Integrierte Systeme und Bauelementetechnologie IISB  
Weiss, Tilman
Erlbacher, Tobias  
Fraunhofer-Institut für Integrierte Systeme und Bauelementetechnologie IISB  
Journal
Key engineering materials  
Project(s)
Technologieentwicklung, Herstellung und Charakterisierung von SiC-basierten (V)UV-Photodioden mit Ionen-implantiertem p-Emitter
Funder
Bundesministerium für Wirtschaft und Klimaschutz -BMWK-
Conference
International Conference on Silicon Carbide and Related Materials 2022  
Open Access
DOI
10.4028/p-959z1t
Language
English
Fraunhofer-Institut für Integrierte Systeme und Bauelementetechnologie IISB  
Keyword(s)
  • photodiode

  • UV

  • VUV

  • pin-diode

  • shallow ion implantation

  • shallow emitter

  • spectral responsivity

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