전지훈 Kuk, Song-Hyeon 조아진 Baek, Seung-Hyub Kim, Sang-Hyeon Kim, Seong Keun 2024-01-12T06:35:41Z 2024-01-12T06:35:41Z 2023-07-04 2023-06 0003-6951 https://pubs.kist.re.kr/handle/201004/79906 We demonstrate n-type ferroelectric field-effect transistors (FeFETs) employing atomic-layer-deposited HfZrOx (HZO) films with a large memory window (MW) immediately after the write operation. Charge trapping at the HZO/Si interface in FeFETs is the primary source of memory window reduction. To control the properties of the interfacial layer, we varied the O3 injection time during atomic layer deposition. The HZO (long O3 of 7？s)-based FeFET demonstrated a large MW (2.1？V) in the DC transfer curves compared with the HZO (short O3 of 0.3？s)-based FeFET (0.9？V), although the bulk properties of the HZO films barely changed with the O3 injection time. In pulsed I？V measurements with an extremely short delay time of 100？ns between pulses, the HZO (long O3 of 7？s)-based FeFET showed a large MW of 1.0？V. Such improvements in the performance of HZO-based FeFETs indicate that the trap density in the interfacial layer is reduced by the use of a long O3 injection time. This is supported by the variation in the silicate/SiO2 ratio within the interfacial layer of the HZO films deposited at various O3 injection times.</jats:p> English American Institute of Physics Memory window enhancement in n-type ferroelectric field-effect transistors by engineering ozone exposure in atomic layer deposition of HfZrOx films Article 10.1063/5.0152022 1 Applied Physics Letters, v.122, no.23 Applied Physics Letters 122 23 N scie scopus 001007710000001 Physics, Applied Physics Article