pp 1–7 | Cite as

Effect of Temperature on Electro-Optical Characteristics of Silicon Based p-n Photodiode (VTB8440BH)

  • Pradip Dalapati
  • Nabin Baran Manik
  • Asok Nath Basu
Original Paper


To get useful information about the carrier transport mechanism we first measure the current-voltage (I-V) characteristics of a silicon p-n photodiode (VTB8440BH) in the temperature range 350 − 110 K. All semilog I-V curves exhibit three successive linearly dependent regions along with their bias levels which are defined as I, II and III regions, respectively. Regions I and II with different slopes are used to determine the bias dependent ideality factors namely, n1 and n2. The variation of n1 and n2 with temperature shows that with lowering of temperature the tunneling probability gradually increases. Furthermore, these results are used to identify the paramount carrier at different bias levels. Secondly, to acquire knowledge of electron-hole generation rate we measure the variation of photocurrent in the same temperature range. Results show that photocurrent decreases slowly as temperature decreases from 350 to 239 K and it changes sharply below 239 K. The change of photocurrent with temperature is explained in terms of temperature dependence of carrier mobility, lifetime and optical generation rate. Finally, these results will be helpful for precision application of the optoelectronics device in both high and low temperature ambience.


Si based photodiode Ideality factor Tunneling effect Photocurrent Optical generation rate Thermal stress 


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The authors acknowledge the Defense Research Development Organization (DRDO), India, for financial assistance, and one of the authors, P. Dalapati is thankful to DRDO for the award of a research fellowship. Also, he has shown his gratitude to M. Mukharjee for giving her support for preparing the manuscript.


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© Springer Science+Business Media B.V., part of Springer Nature 2018

Authors and Affiliations

  • Pradip Dalapati
    • 1
    • 2
  • Nabin Baran Manik
    • 1
  • Asok Nath Basu
    • 1
  1. 1.Condensed Matter Physics Research Centre, Department of PhysicsJadavpur UniversityKolkataIndia
  2. 2.Department of Information EngineeringUniversity of PadovaPadovaItaly

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