Solar based Biomedical Devices: A Comprehensive Review of Photovoltaic Materials and Devices for Sustainable Healthcare Systems
Author: Nusra Akter Takia, Md. Nasif Ibnay Kadir, Hasib Md. Abid Bin Farid, M.S. Hossain Lipu, M.M. Naushad Ali, Rajvikram Madurai Elavarasan, Taskin Jamal
Abstruct:Â The growing use of biomedical electronic devices in healthcare has driven extensive research on many energy-harvesting approaches. Among these methods, the solar cell is found to be one of the most promising power sources for implantable biomedical devices. Recent advancements in solar cell technology, including flexibility, light weight, biocompatibility, and miniaturization, make it ideal for the aforementioned applications. Despite the potential of solar devices, few studies have compared the biocompatibility of implanted solar cells with batteries in patients. Additionally, other factors, such as economic viability, downsizing, and regulatory issues, require further study. Based on these elements, the present review could inspire future research and the clinic of solar cell technology in biodevices. This article extensively examines the performance of different solar cell-based energy harvesters under various atmospheric conditions, drawing from studies involving both human and animal subjects. It also investigates the utilization of solar cell technology to detect cancer cell biomarkers. This work provides a new perspective for solar cells in biomedicine and opens up fields such as Electrocardiogram, Electroencephalogram, glucose monitoring, solar-powered autoclaves for off-grid sterilization, and photothermal and photoelectrochemical systems for dental and oncological treatments. The review also explores integration with IoT-based biosensors and energy storage systems to enhance reliability under low-light or intermittent illumination. Finally, this study highlights the potential of enhancing retinal prostheses using solar cell technology for retinal implants. This comprehensive discussion and review will enable researchers to further investigate energy-harvesting techniques for future implantable biomedical devices.
Numerical Modeling of Cu2MnSnS4/FeSi2 Dual-Absorber Solar Cell Achieving High Efficiency
Author: Hasib Md Abid Bin Farid, Dr. Tashfiq Bin Kashem
Abstract: Dual-absorber solar cells represent a promising approach to surpass the efficiency limit of single-junction devices by extending spectral absorption and minimizing thermalization losses. Among earth-abundant thin-film materials, kesterites have attracted considerable interest, however, the well-studied Cu2ZnSnS4 (CZTS) continues to face challenges related to antisite disorder and secondary phase formation. Replacing Zn with Mn in Cu2MnSnS4 (CMTS) mitigates these limitations, improving cation ordering and electronic quality while maintaining favorable optical properties. Yet, despite its potential, CMTS remains largely unexplored in multi-absorber configurations-only one prior study has reported a CMTS-based dual-absorber device. In this work, we present a comprehensive numerical investigation of a CMTS-FeSi2 dual-absorber thin-film solar cell using the one-dimensional solar cell capacitance simulator (SCAPS-1D). FeSi2, with its narrow band gap (0.87 eV) and strong near-infrared absorption, serves as an ideal bottom absorber to complement CMTS, enabling broader spectral utilization. The study systematically examines the effects of geometrical, electronic, and interfacial parameters on carrier transport, and overall device performance. The optimized device delivers an impressive power conversion efficiency of 34.9%, with VOC = 0.79 V, JSC = 51.07 mA/cm2, and a fill factor of 85.91%. These findings demonstrate that integrating FeSi2 with CMTS not only enhances carrier collection and spectral harvesting but also establishes a new pathway toward high-efficiency, sustainable, and environmentally benign thin-film photovoltaics. This material also performs well in low-light and dark conditions, making it suitable for use in biosensors.
Design and Analysis of a Magneto-Resistance-Based Device to Mitigate Risks from High Magnetic Field Exposure
Author:Â Kazi Mustafizur Rahman, Md. Mushfiqur Rahman, Sadia Islam, Hasib Md Abid Bin Farid, and Md. Faysal Nayan
Abstract: The motivation is to develop a device for pacemaker-implanted patients that would automatically alert them in an intense magnetic field. Moreover, the employees working near any strong magnetic environment would benefit by avoiding high exposure. This research delves into a comprehensive process for the implementation and characterization of such a wearable based on the magnetoresistance effect, which is a function of the magnetic field. The program executes on the Arduino IDE platform. Samples are taken for varying magnetic flux density along each axis, for changes in distance of 2.5 mm. The calculations take place accordingly and provide outputs in microtesla units. Subsequently, the device is analyzed by plotting the responses, and it also helps to understand the working procedure. For a certain axis, the magnetic field is generally stronger than others. The goal is to determine the highest absolute value at any instance, including the Earth’s geomagnetic field of 22 to 67 microtesla. Regulatory standards are followed to divide the magnetic flux density into four states: power saver (below 150 microtesla), safe (150 to 500 microtesla), unsafe (500 to 750 microtesla), and danger (over 750 microtesla). These values consist of ±20 microtesla error, which is quite insignificant. Depending on the state, the novel device generates different warning signals to mitigate risk from magnetic fields. From the error bar plot, it is realized that the percentage of error decreases while calculating higher magnetic flux. The errors could be reduced remarkably by ensuring better calibration and compensation techniques in the future.