The electronic circuit design of polyaniline based solar cells

• Main Authors: Yi-Jhen Wu, 吳宜振
• Other Authors: Ko-Shan Ho
• Format: Others
• Language: zh-TW
• Online Access: http://ndltd.ncl.edu.tw/handle/5dwr9w

博士 === 國立高雄應用科技大學 === 機械與精密工程研究所 === 100 === Preparation of polyaniline nanotube coating materials on the silicon wafer back electrode was carried out. The nanofibrous polyaniline was prepared by emulsion polymerization in the presence of PSA and Hydrochloric acid (HCl). Since its helical nanofiberous conformation, it can increase the conjugation of molecular chain, leading to various achievable electronic applications and solubility enhanceing for a wider application. The nanofiberous polyaniline of the conductive ink can penetrate into the voids of aluminum metal electrode, improving the hole mobility of the back electrode of Si-solar cell , which then results in the increase of its Voc, Isc, Fill factor and Efficiency. In order to obtain the maximum output power of a photovoltaic array of polyaniline nanotubes based Si-solar cell and protect the battery from overcharge, a charger associated with boost and flyback converters controlled by a microprocessor is proposed. The charger can automatically switch to an appropriate charge mode according to the output power of the PV array and the charge state of the battery bank. The maximum power point tracking and the charge methods are explored. Further, a strategy to charge the battery bank is designed from the analyses and comparison results of regular Si-solar cell. The prototype of this microprocessor-based charger performs a good control on the switching modes among MPPT, Pulse charging method and constant voltage charge mode. The measurement of practical experiment agrees with the simulation results that proves the feasibility of the proposed charger for polyaniline nanotubes based Si-solar cell as well . Outdoor solar applications of computer aided software,which is written to VB.Net platform test in the measurement of voltage ,current and voltag. The actual operation is to set every 5 seconds to capture and to store these data, in addition, the data on the monitoring screen were updated constantly. The acquisition data recorded the temperature, humidity, wind direction and wind speed of the weather station. The capacity of daily stored data would be 1.4MB. To verify the feasibility of the software platform, this study is also conducted the outdoor measurement experiments by two types of photovoltaic modules- a standard module, and back electrode coated polyaniline polymer materials. The acquisition data is including six strategic temperature points on the module surface, module open circuit voltage, and short circuit current based on the instant amount of sunlight, atmospheric temperature, atmospheric humidity, wind speed, and wind direction, respectively. From measurements of the 700W/m2 ~ 1100W/m2 ,apparent efficiency average 0.25% increase was found, short current is about 0.22A, the average wind speed is 5.66m / s, the instantaneous wind speed is 9 m / s, the average temperature wsa 33.04 ℃with an average difference of about 4 ℃, the smallest difference of the module was about 3.6W, and the largest difference is about 8.66W.