Amplification of pyroelectric device with WSe2 field effect transistor and ferroelectric gating

Stephen C. Mbisike, Lutz Eckart, John W. Phair, Peter Lomax, Rebecca Cheung

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

A WSe2 field effect transistor integrated with a lead zirconium titanate (PZT) pyroelectric device has been designed, fabricated, and tested and is described as the integrated pyroelectric device. The integrated device has been compared to a standalone pyroelectric device, which consists of PZT sandwiched between platinum electrodes. A pyroelectric coefficient of 1.755 × 10−4 C/m2K has been realized for our thin-film PZT (650 nm). The integrated device amplifies the output of the standalone device by over ten orders of magnitude as the current density calculated for the devices is 16 nA/mm2 and 1 nA/mm2, respectively. The interplay between the pyro- and ferro-induced polarization of the integrated device has been studied. From our observations, the ferroelectric gating controls directly the drain-source current output of the integrated device, showing anti-clockwise hysteresis behavior. The device shows promise for application in infrared sensing.
Original languageEnglish
Article number144101
JournalJournal of applied physics
Issue number14
Early online date8 Apr 2022
Publication statusPublished - 14 Apr 2022


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