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High Voltage Diodes in Diamond Using (100)- and (111)- Substrates

MetadataDetails
Publication Date2017-03-10
JournalIEEE Electron Device Letters
AuthorsMaitreya Dutta, Franz A. Koeck, Wenwen Li, R. J. Nemanich, Srabanti Chowdhury
InstitutionsUniversity of California, Davis, Arizona State University
Citations39

We present a comparative study of PIN structures in diamond on type IIa (100)- and type IIb (111)-oriented bulk diamond substrates. An 8.5-μm thick i-layer demonstrated a blocking voltage>1kV for the (100)-oriented diamond sample without any mesa isolation, passivation, or edge termination structures. PIN diodes with a 530nm thick drift region, on the (111)-sample, demonstrated a blocking voltage of 207V at a current level of 1A/cm <sup xmlns:mml=ā€œhttp://www.w3.org/1998/Math/MathMLā€ xmlns:xlink=ā€œhttp://www.w3.org/1999/xlinkā€&gt;2&lt;/sup> with a corresponding blocking electric field of 3.9MV/cm. A deep ultraviolet light emission was observed only in (111)-diodes under forward bias, confirming well-behaved p-n junction characteristics in (111) as compared to (100).

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