Indoor LED Charging of Batteries with Organic Solar Modules

Abstract

Energy harvesting inside buildings has received increasing attention as a way to improve the durability and battery life of electronic devices by harnessing ambient light sources. Organic solar modules offer unique advantages, such as flexibility, lightweight, and tunability, making them an attractive candidate for indoor energy harvesting applications. This thesis studies the feasibility of using organic solar modules for charging batteries by LED at 300-500 Lux under the condition of the different spectrum inside the house and in the office. Battery charging tests were performed to analyze the relationship between light intensity, efficiency of organic solar modules and battery charging capacity in indoor applications for charging electronic devices and miscellaneous under low light intensity. In this study, we demonstrated the possibility of charging a sodium anion battery coupled directly to an organic photovoltaic system under a 300-500 Lux LED corresponding to a light power density of 0.107-0.284 mW/cm2.The efficiency of the organic photovoltaic in this range was 4.98% and the efficiency of the PV-to battery was 3.25% and the overall efficiency was 3.07% under an LED light power density of 0.107-0.284 mW/cm2. With the different results we have obtained, and the success of the experiment, recharging electronic devices under indoor lighting with organic photovoltaic cells is feasible.