Chin. Phys. Lett.  2012, Vol. 29 Issue (9): 097202    DOI: 10.1088/0256-307X/29/9/097202
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
Suppression of the Drift Field in the p-Type Quasineutral Region of a Semiconductor p–n Junction
CAI Xue-Yuan, YANG Jian-Hong**, WEI Ying
Institute of Microelectronics, School of Physical Science and Technology, Lanzhou University, Lanzhou 730000
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CAI Xue-Yuan, YANG Jian-Hong, WEI Ying 2012 Chin. Phys. Lett. 29 097202
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Abstract An improved analytical model of the drift field suppressed by the Dember field due to ambipolar diffusion in the p-type quasineutral region (p-QNR) of a forward silicon p–n junction at low injection levels is presented with a good fit to the numerical simulation results. Considering ambipolar transport of both carriers, the diode current in the p-QNR is found to consist of a minority-electron diffusion-current component and majority-hole drift- and diffusion-current components, and the Dember field plays a dominant role in balancing all the components mentioned above to keep the current constant. The analytical model is beneficial to completely understand ambipolar current transport mechanisms in semiconductor p–n junction devices.
Received: 20 January 2012      Published: 01 October 2012
PACS:  72.20.-i (Conductivity phenomena in semiconductors and insulators)  
  72.20.Fr (Low-field transport and mobility; piezoresistance)  
  85.30.Kk (Junction diodes)  
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https://cpl.iphy.ac.cn/10.1088/0256-307X/29/9/097202       OR      https://cpl.iphy.ac.cn/Y2012/V29/I9/097202
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CAI Xue-Yuan
YANG Jian-Hong
WEI Ying
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