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Current–voltage characteristics of light-emitting diodes under optical and electrical excitation

Wen Jing, Wen Yumei, Li Ping and Li Lian

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Abstract: The factors influencing the current–voltage (IV) characteristics of light-emitting diodes (LEDs) are investigated to reveal the connection of IV characteristics under optical excitation and those under electrical excitation. By inspecting the IV curves under optical and electrical excitation at identical injection current, it has been found that the IV curves exhibit apparent differences in voltage values. Furthermore, the differences are found to originate from the junction temperatures in diverse excitation ways. Experimental results indicate that if the thermal effect of illuminating spot is depressed to an ignorable extent by using pulsed light, the junction temperature will hardly deflect from that under optical excitation, and then the IV characteristics under two diverse excitation ways will be the same.

Key words: current–voltage characteristicslight-emitting diodesoptical excitationelectrical excitationjunction temperature

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    Received: 18 August 2015 Revised: 21 March 2011 Online: Published: 01 August 2011

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      Wen Jing, Wen Yumei, Li Ping, Li Lian. Current–voltage characteristics of light-emitting diodes under optical and electrical excitation[J]. Journal of Semiconductors, 2011, 32(8): 084004. doi: 10.1088/1674-4926/32/8/084004 Wen J, Wen Y M, Li P, Li L. Current–voltage characteristics of light-emitting diodes under optical and electrical excitation[J]. J. Semicond., 2011, 32(8): 084004. doi: 10.1088/1674-4926/32/8/084004.Export: BibTex EndNote
      Citation:
      Wen Jing, Wen Yumei, Li Ping, Li Lian. Current–voltage characteristics of light-emitting diodes under optical and electrical excitation[J]. Journal of Semiconductors, 2011, 32(8): 084004. doi: 10.1088/1674-4926/32/8/084004

      Wen J, Wen Y M, Li P, Li L. Current–voltage characteristics of light-emitting diodes under optical and electrical excitation[J]. J. Semicond., 2011, 32(8): 084004. doi: 10.1088/1674-4926/32/8/084004.
      Export: BibTex EndNote

      Current–voltage characteristics of light-emitting diodes under optical and electrical excitation

      doi: 10.1088/1674-4926/32/8/084004
      Funds:

      the National Science Foundation of China (61006053)

      • Received Date: 2015-08-18
      • Accepted Date: 2011-02-15
      • Revised Date: 2011-03-21
      • Published Date: 2011-07-19

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