Abstract
This paper presents the performance of indoor energy harvesting systems based on different photovoltaic modules (monocrystalline silicon, polycrystalline silicon, amorphous silicon and polymer) and artificial electric lighting sources (incandescent, fluorescent and cool white flood LED). In this concern, it is clearly proved that, maximum output power densities to be harvested from the photovoltaic module depends mainly on the spectral responses of both the light source and the module material. Herein, and from the study, experimental work, results and analysis, it is clear that monocrystalline silicon is the optimum solution for all light sources, followed by polycrystalline, whenever used with spot-and incandescent - lamps. On the other hand, amorphous samples were proved to be lightly sensitive to fluorescent light and cool white flood LED. Finally, polymer samples were weakly responded whenever exposed to any of the investigated light sources.
Highlights
Energy-harvesting systems that convert ambient energy to usable electrical power have emerged as a potential alternative to wired and battery power [1]
The output power density of each solar module is measured under the four different artificial light sources; spot, incandescent, fluorescent and cool white flood Light Emitting Diode (LED)
The output power density versus the output current as the load resistance is varied of the monocrystalline silicon, polycrystalline silicon, amorphous silicon and polymer solar modules under four different illumination sources at 700 lux are shown in Fig. (4)
Summary
Energy-harvesting systems that convert ambient energy to usable electrical power have emerged as a potential alternative to wired and battery power [1]. Indoor photovoltaic harvesters will soon be playing a major function in supplying energy to low operation power sensors and wireless devices, especially if photovoltaic technology can be advanced and customized for these applications. This is due to the widespread accessibility of light as an energy source inside residential and commercial buildings [2]. Many different solar cell technologies have been progressing and optimized for energy harvesting from either natural or artificial light; the output power of a solar cell is influenced by the spectral composition of the incident light. Four important artificial light sources were tested: spot lamp, incandescent lamp, fluorescent lamp and white flood LED, typically encountered within buildings, for various illumination levels
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