Photo-reception properties of common LEDs

Marcin Kowalczyk , Jerzy Siuzdak

Abstract

The article proves that common LEDs may act as photodetectors with limited sensitivity, if they are polarized with an appropriate reverse voltage. The measured responsivities are ranged between 0.002 and 0.156 A/W and they depend on the LED type. The only one exception are white (phosphorescent) LEDs which do not exhibit any photosensitivity. There have also shown that a bandwidth of LEDs, which were examined in a role of photodetectors, is of a few tens of MHz, which is an order of magnitude greater than their modulation bandwidth as transmitters. The reasons of the observed LEDs behaviour are explained theoretically. The obtained results are indicated that some of them may be used as both transmitters and receivers in the VLC links working in a bi-directional half-duplex mode.
Author Marcin Kowalczyk (FEIT / IT)
Marcin Kowalczyk,,
- The Institute of Telecommunications
, Jerzy Siuzdak (FEIT / IT)
Jerzy Siuzdak,,
- The Institute of Telecommunications
Journal seriesOpto-Electronics Review, ISSN 1230-3402, (A 20 pkt)
Issue year2017
Vol25
No3
Pages222-228
Publication size in sheets0.5
Keywords in EnglishLEDs as photo-detectors, Visible light communication (VLC); Bi-directional transmission
ASJC Classification2208 Electrical and Electronic Engineering; 3108 Radiation
DOIDOI:10.1016/j.opelre.2017.06.009
ProjectThe Develpment of Digital Communicatios. Project leader: Siuzdak Jerzy, , Phone: +48 22 234-7868, start date 11-04-2016, end date 31-12-2017, IT/2016/statut, Completed
WEiTI Działalność statutowa
Languageen angielski
Score (nominal)20
Score sourcejournalList
ScoreMinisterial score = 20.0, 03-02-2020, ArticleFromJournal
Publication indicators WoS Citations = 2; Scopus Citations = 7; GS Citations = 9.0; Scopus SNIP (Source Normalised Impact per Paper): 2017 = 1.16; WoS Impact Factor: 2017 = 1.156 (2) - 2017=1.519 (5)
Citation count*9 (2020-02-03)
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* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.
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