Mobility and Threshold Voltage Extraction in Transistors with Gate-Voltage-Dependent Contact Resistance
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arXiv
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| Autori principali: | , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866913700929077248 |
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| author | Bennett, Robert K. A. Hoang, Lauren Cremers, Connor Mannix, Andrew J. Pop, Eric |
| author_facet | Bennett, Robert K. A. Hoang, Lauren Cremers, Connor Mannix, Andrew J. Pop, Eric |
| contents | The mobility of emerging (e.g., two-dimensional, oxide, organic) semiconductors is commonly estimated from transistor current-voltage measurements. However, such devices often experience contact gating, i.e., electric fields from the gate modulate the contact resistance during measurements, which can lead conventional extraction techniques to estimate mobility incorrectly even by a factor >2. This error can be minimized by measuring transistors at high gate-source bias, |$V_\mathrm{gs}$|, but this regime is often inaccessible in emerging devices that suffer from high contact resistance or early gate dielectric breakdown. Here, we propose a method of extracting mobility in transistors with gate-dependent contact resistance that does not require operation at high |$V_\mathrm{gs}$|, enabling accurate mobility extraction even in emerging transistors with strong contact gating. Our approach relies on updating the transfer length method (TLM) and can achieve <10% error even in regimes where conventional techniques overestimate mobility by >2$\times$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2404_19022 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Mobility and Threshold Voltage Extraction in Transistors with Gate-Voltage-Dependent Contact Resistance Bennett, Robert K. A. Hoang, Lauren Cremers, Connor Mannix, Andrew J. Pop, Eric Applied Physics Other Condensed Matter The mobility of emerging (e.g., two-dimensional, oxide, organic) semiconductors is commonly estimated from transistor current-voltage measurements. However, such devices often experience contact gating, i.e., electric fields from the gate modulate the contact resistance during measurements, which can lead conventional extraction techniques to estimate mobility incorrectly even by a factor >2. This error can be minimized by measuring transistors at high gate-source bias, |$V_\mathrm{gs}$|, but this regime is often inaccessible in emerging devices that suffer from high contact resistance or early gate dielectric breakdown. Here, we propose a method of extracting mobility in transistors with gate-dependent contact resistance that does not require operation at high |$V_\mathrm{gs}$|, enabling accurate mobility extraction even in emerging transistors with strong contact gating. Our approach relies on updating the transfer length method (TLM) and can achieve <10% error even in regimes where conventional techniques overestimate mobility by >2$\times$. |
| title | Mobility and Threshold Voltage Extraction in Transistors with Gate-Voltage-Dependent Contact Resistance |
| topic | Applied Physics Other Condensed Matter |
| url | https://arxiv.org/abs/2404.19022 |