Modeling and Electrical Simulations of Thin-Film Gated SOI Lateral PIN Photodetectors for High Sensitivity and Speed Performances

  • Guoli Li
  • Yun Zeng
  • Wei Hu
  • Yu Xia
  • Wei Peng
Part of the Communications in Computer and Information Science book series (CCIS, volume 396)


Thin-film gated SOI lateral PIN (LPIN) photodetectors was proposed, with ITO deposited on topside as transparent gate electrode. This paper investigates performances of the photodetectors versus the P-doping level in the intrinsic region (I-region), with gate voltage applied. We present analytical model and two-dimensional Atlas simulations of the current characteristics, sensitivity and speed performance. At a 400 nm wavelength, the output photocurrent approximately reaches the available photocurrent, the internal quantum efficiencies yield over 90%, even nearly 100% with various dopings. In terms of speed performances, the total -3dB frequencies of the photodetectors are up to a few tens of MHz with the intrinsic length of 8 um. And dark currents as low as 10− 14 A can give a high ratio of more than 107 between illuminated to dark currents under low-voltage operation. With such advantageous electrical characteristics, thin-film gated SOI LPIN photodetectros appear highly suitable for optical storage systems and blue DVD applications.


lateral PIN photodetector SOI intrinsic region fully depleted P-doping 


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Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • Guoli Li
    • 1
  • Yun Zeng
    • 1
  • Wei Hu
    • 1
  • Yu Xia
    • 1
  • Wei Peng
    • 1
  1. 1.School of Physics and Microelectronics ScienceHunan UniversityChangshaPeople’s Republic of China

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