INVESTIGATING THE PHOTOVOLTAIC BEHAVIOUR OF LIGHT-EMITTING DIODE (LED) (original) (raw)
Related papers
International Journal of Power Electronics and Drive Systems (IJPEDS)
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 photogenerated voltage and current at one-hour intervals. Solar radiation on a horizontal surface was measured using a Pyranometer.
International Journal of Power Electronics and Drive System (IJPEDS), 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.
Research note: Light emitting diodes as solar power resources
Lighting Research & Technology, 2018
This paper investigates the possibility of recycling light emitting diodes from damaged electronic devices, and using them in a similar way to photovoltaic cells in order to reduce environmental pollution. The study used a number of tests with a variety of different parameters for measuring the capability for light emitting diodes to harvest the sun’s rays and to convert them into a useful form of electrical power. The different configurations involved variations of light emitting diode wavelength and number, as well as the connection types between the light emitting diodes (series and parallel) and the angle of incidence of the sun’s rays to the light emitting diode’s base. The results showed promising voltage data for parallel-connected light emitting diodes of lemon (yellow-green) and green colour. The variations in voltage produced by tilting the light emitting diode’s base exhibited similar behaviour to that seen in solar panels. The power that was harvested from the light emit...
International Journal of Physical Research, 2018
There is need to always obtain the realistic outdoor performance variables of Photovoltaic (PV) module in a location for efficient PV power system sizing and design. Outdoor performance evaluation was carried out on three types of commercially available silicon PV modules rated 10 W each, using CR1000 software-based Data Acquisition System (DAS). The PV modules under test and meteorological sensors were installed on a metal support structure at the same test plane.The data monitoring was from 08.00 to 18.00 hours each day continuously for a period of one year, from December 2014 to November 2015. Maximum values of module efficiencies of 5.86% and 10.91% for the monocrystalline and polycrystalline modules were respectively recorded at irradiance of 375 W/m2, while the amorphous efficiency peaked at 3.61 % with irradiance of 536.5 W/m2. At 1000 W/m2 the efficiencies reduced to 3.30 %, 6.20 % and 2.25 % as against manufacturer's specifications of 46 %, 48 % and 33 % for the monocrystalline, polycrystalline and amorphous modules respectively. The maximum power output achieved for the modules at irradiance of 1000 W/m2 were 0.711 W, 1.323 W and 0.652 W for the monocrystalline, polycrystalline and amorphous PV modules, respectively. Accordingly, Module Performance Ratios for the PV modules investigated were 0.07, 0.13 and 0.07, respectively. The rate of variation of module response variables with irradiance and temperature was determined using a linear statistical model given as Y= a + bHg+ c Tmod. The approach performed creditably when compared with measured data.
Photovoltaic effect or phenomenon is the creation of a voltage and corresponding current in a material upon exposure to light energy following the principle that for every excitation there must be a response. The exposition of a solar cell to incident optical radiation excites the dislodgement of electrons hence the creation of holes and subsequent migration of opposite charges. The amount of voltage that can be generated is a function of the intensity of incident optical radiation and the position of the solar cell to such radiation. Measurements of illumination intensity from halogen and tungsten lamps by a digital lux meter and open circuit voltage, short circuit current as output parameters by volt-amp meter LCD display embedded in the solar power device was carried out. The evaluation of fill factor, maximum power and conversion efficiency as other output parameters in relation to illumination from the sources of light at varying angle and distance were carried out in this study also. The variation of the internal resistance of the cell with light intensity was also investigated. The maximum output voltage and current were realized at angle zero degree when the light ray falls at normal to the cell surface. The two 10Watts halogen lamp gave the highest illumination intensity of 116lx while the 40Watt and 60Watt tungsten lamp placed at 10cm from the solar cell indicated an intensity of 70lx and 25lx each. The results showed the strongly direct dependency of these parameters on illumination intensity and their inverse dependence on the tilt angle and distance of the illumination source. The internal resistance decreases with increasing intensity while the evaluated fill factor, maximum power and efficiency remain fairly constant but at an average value 0.53, 122mW and 55% respectively.
Harnessing solar energy requires photovoltaic effect which can be found in LEDs (Light emitting diodes). The same effect when using a solar panel to harness energy. The researchers then thought of using LED as an alternative to solar panels in harnessing solar energy. The research on LED solar panels aims to have equal efficiency at a lower cost. This research is supported by two theories, the theory on solar energy materials, which the researchers seek for cheaper materials, and the theory on solar cells, where the process of harnessing solar energy using photovoltaic systems. The study utilizes experimental design and post-test method where the researchers compared the LED solar panel to the conventional solar panel. The researchers then gather the voltage output in both solar panels with 5 seconds interval for 2 minutes. The data gathered is then analyzed using t-test method. The mean output voltage of the LED solar panel os M= 4.1585 and the conventional solar panel has M=1.09 and the cost of conventional solar panel is 31.23% lower than the LED solar panel, which makes the conventional solar panel more efficient and cheaper.
Photovoltaic effect in Light Emitting Diodes
Algerian journal of signals and systems, 2016
Bd des Martyrs. BP37G Laghouat-03000-Algérie (3) Dept d'électronique école nationale polytechnique (ENP) d'El-Harrach Algiers Algeria Page range: 30-36 IMPORTANT NOTICE This article is a publication of the Algerian journal of Signals and Systems and is protected by the copyright agreement signed by the authors prior to its publication. This copy is sent to the author for non-commercial research and education use, including for instruction at the author's institution, sharing with colleagues and providing to institution administration. Other uses, namely reproduction and distribution, selling copies, or posting to personal, institutional or third party websites are not allowed.
Impact of Environmental Factors on the Working of Photovoltaic Cells
American Scientific Research Journal for Engineering, Technology, and Sciences, 2016
This paper discussed the stimulation of diffused and global sun rays on the site of Pakistan, striking the PV cell, is done for varying environmental conditions. This is done with the help of model used for spectral transmittance. Different effects are examined including efficiency of various types of PV cells, variation in whole intensity and the distribution of spectrum on short circuit current. The outcome shows an inverse relationship between turbidity and short circuit current. In the case of global sun rays the reduction of short circuit current due to turbidity is 4.4% for monocrystalline PV cell, 4.8% for multicrystalline PV cell and 7.33% for amorphous PV cell but in case of diffuse sun rays it increases. The relationship between short circuit current and water vapors is also inverse but this effect shows only in case of global sun rays. The decrement in the short circuit current due to water vapor is 4.6% for moncrystalline, 4.39% for multicrystalline, and 0.19% in case of...
Performance Analysis of Various Types of High Power Light Emitting Diodes
Light and Engineering , 2018
Solid state, energy efficient light emitting diode (LED) technology is coming up to replace the conventional gas discharge, etc. light sources. Although declared life of LED is very high but in tropical countries their life time appears very short. This phenomenon is becoming the most drawbacks for usage of LED. To search out the reason for the failure lead to undertake thorough study on the performance of LED specifically on the various environmental conditions. Experimentation was carried out with various types of commercially available high power LED. Failure in tropical countries may be due to effect of temperature. Test results have been noted at various major parts of LEDs, e.g. die, and sink area. Detail analysis of test results at various parts of LEDs in different conditions tends to have some idea about the cause of failure of the LEDs in tropical countries with high ambient temperature and less scope of heat generation by the light source.
The Influence of Artificial Light and Shading on Photovoltaic Solar Panels
International Journal of Energy Engineering, 2013
The efficiency of use of solar panels is influenced by many factors. This paper investigates, by experiment, the influence of artificial light and shading on solar panel cells. Firstly, the panel cells are exposed to artificial light of three different power levels. Secondly, the panel cells were shaded by one-quarter, half and three-quarters. Current-voltage and power-voltage characteristics were determined for both cases. Efficiency calculations were done at the maximu m power point. It was observed that when the panel cells were exposed to artificial light sources, the power output and efficiency slightly increased and when exposed to shading, there was a significant reduction in power and efficiency.