Makale detayı · 2018
Negative Differential Resistance Observation and a New Fitting Model for Electron Drift Velocity in GaN-Based Heterostructures
IEEE TRANSACTIONS ON ELECTRON DEVICES
- Yıl
- 2018
- ISSN
0018-9383- Tür
- article
Veri kaynağı ayrımı
- YÖKSİS YÖKSİS makale kaydı
- OpenAlex OpenAlex zenginleştirmesi (özet, atıf, konular)
Özet
İngilizce (OpenAlex)
The aim of this paper is an investigation of electric field-dependent drift velocity characteristics for Al0.3Ga0.7N/AlN/GaN heterostructures without and with in situ Si3N4passivation. The nanosecond-pulsed current- voltage (I-V) measurements were performed using a 20-ns applied pulse. Electron drift velocity depending on the electric field was obtained from the I-V measurements. These measurements show that a reduction in peak electron velocity from 2.01 × 107to 1.39 × 107cm/s after in situ Si3N4passivation. Also, negative differential resistance regime was observed which begins at lower fields with the implementation of in situ Si3N4passivation. In our samples, the electric field dependence of drift velocity was measured over 400 kV/cm due to smaller sample lengths. Then, a wellknown fitting model was fitted to our experimental results. This fitting model was improved in order to provide an adequate description of the field dependence of drift velocity. It gives reasonable agreement with the experimental drift velocity data up to 475 kV/cm of the electric field and could be used in the device simulators.
Konular
- GaN-based semiconductor devices and materials
- Semiconductor materials and devices
- Advancements in Semiconductor Devices and Circuit Design
Birincil konu GaN-based semiconductor devices and materials