International Journal of Power Electronics and Drive System (IJPEDS) Vol. 9, No. 3, September 2018, pp. 1406~1411 ISSN: 2088-8694, DOI: 10.11591/ijpeds.v9.i3.pp106-1411  1406 Journal homepage: http://iaescore.com/journals/index.php/IJPEDS Investigation of the Experimental Characterization of the Different Inorganic Light Emitting Diodes (LEDS) and the Photovoltaic Effect on these LEDs K. Remidi 1 , A. Cheknane 2 , M. Haddadi 3 1 Department of Physics Ecole Normale Supérieure (ENS), Algeria 2 Laboratory of Semiconductors and Functional Materials, Université Amar Telidji de Laghouat, Algeria 3 Electrical Department National Polytechnic School or École Nationale Polytechnique (ENP), Algeria Article Info ABSTRACT Article history: Received May 22, 2018 Revised Jul 17, 2018 Accepted Aug 6, 2018 This paper describes our experiments on the electrical characterization of commercial light emitting diodes of different colors as well as their photoelectric effect. This experiment was conducted at the IMS of Bordeaux, which has a measurement bench allowing the intrinsic characterization of different light-emitting diodes in direct and reverse polarization. This bench also makes it possible to compare these experimental values with the theoretical values obtained by modeling.A second work done at the ENP of El-Harrach allowed us to put in place measurement means to show that there is a photovoltaic effect on the LEDs. For this purpose, we have measured the electrical characteristics of different LEDs and studied their light intensities using an EPLEY pyranometer. This work involved red, green , yellow ,white and blue LEDs. The photovoltaic behavior of light-emitting diodes (LEDs) was studied at ENP D'El Harrah Algeria, for a period of three days in March 2016. LEDs were exposed to solar radiation in the form of unitary units of LEDs. 9-16 hours These irradiated LEDs were monitored for photo- generated voltage and current at one-hour intervals. Solar radiation on a horizontal surface was measured using a Pyranometer. Keyword: Light emitting diodes (LEDS) ENP Copyright © 2018 Institute of Advanced Engineering and Science. All rights reserved. Corresponding Author: K. Remidi, Deptement oh Physics Ecole Normale Supérieure (ENS) Kouba 16050 Alger Algérie. Email: remidikam@gmail.com 1. INTRODUCTION LEDs are now cost-effective light sources for general lighting and accent lighting. they can replace conventional light sources and thus improve flexibility and reduce power consumption. In 1962, the first red LED was created by Nick Holon yak Jr and S. Bevacqua. For several years, researchers have been limited to a few colors such as red (1962), yellow and blue (1972) [1, 2] .or green. Conventional low power LEDs are an attractive alternative in comparison to conventional products such as fluorescent lights, incandescent or discharge. They offer such a great advantage which is low power consumption, long life time and the ability to select a very specific color among many others. High power white LEDs (over 1W) have been gaining momentum since the beginning of the 2000s for use in backlighting displays, car headlights and general lighting. On October 7, 2014, Shuji Nakamura, Isamu Akasaki and Hiroshi Amano received the Nobel Prize in Physics for their work on blue LEDs [9] [3] Light-emitting diode (LED) is a semiconductor diode that gives olight when forward biase. [4, 5] The radiation comes from the emission of a photon during the electron / hole recombination [6, 7] In the general case, an LED must be connected to a voltage source via a current limiting resistor [5, 8]. LEDs are made of gallium arsenide (GaAs), gallium arsenide phosphide (GaAsP), or gallium phosphide (GaP). GaAs LEDs emit infrared (IR) radiation, GaAsP produces either red