In this article, we describe the construction and operation of a low-cost experimental system to demonstrate the fundamental concepts of solar photovoltaic cells. The major goal of this project is to provide students with basic instrumentation and methodologies to learn fundamental concepts of solar photovoltaic cell and its application. The system runs under the Windows operating system and is composed of an Arduino UNO ATmega328p data acquisition board as well as current and voltage sensing elements. A software written under the open-source programming language platform was used to program the microcontroller while the sun path simulation software was used for tracking the sun. The site location coordinates were determined by using a Google maps application. The experiments were performed throughout the day and the current and voltage data were automatically captured and graphically presented in an excel spreadsheet. It was found that the fill factor and power conversion efficiency o.....

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Isotherms are generally curves that depict the phenomena that govern a substances mobility at a constant temperature and pH. In this study, the Langmuir layer of P3OT, P3HT and PCBM were characterised by computing their surface pressure as a function of the surface area available to the molecules at the interface to obtain a curve called surface pressure area (?-A) isotherm. All three polymers were spread on two types of subphases-DI water and water containing bivalent metal ions, Pb2+. None of the Langmuir layers exhibits discrete gas-liquid-solid phase transitions on the water subphase. However, more stable Langmuir layers formed when lead ions were added to the water subphase. The stability enables the capping of lead ions between the polymer chain or within the balls, which can be implemented in flexible electronic devices. 2023, Penerbit Akademia Baru. All rights reserved...

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