Characterization of improved algaas/gaas resonant tunneling heterostructure bipolar transistors

Jenq Shinn Wu, Chun Yen Chang, Chien Ping Lee, Kou Hsiung Chang, Don Gey Liu, Der Cherng Liou

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We report on the fabrication of AlGaAs/GaAs resonant tunneling heterostructure bipolar transistors (RTHBT’s). The devices exhibit a current peak in the transfer characteristics, with peak-to-valley current ratios of 1.7 and 9 at 300 K and 77 K, respectively. The common-emitter small signal current gains at 300 K and 77 K reach 40 and 28, respectively. They are the best results to date for AlGaAs/GaAs resonant tunneling transistors. Because the double barriers are placed in the emitter and far from the emitter-base interface, and the heterostructure emitter suppresses the hole injection from the base to the emitter, the occurrence of the negative differential resistance (NDR) in the device characteristics is governed by the emitter current but not by the base current. The operation mechanism of the NDR behavior in the common-emitter output characteristics is discussed.

Original languageEnglish
Pages (from-to)L160-L162
JournalJapanese Journal of Applied Physics
Issue number2
Publication statusPublished - 1991 Feb


All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy(all)

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