纳米结构硅薄膜太阳电池的温度特性研究

Investigation of Temperature Effect on the Performance of Nanostructured Silicon Thin-Film Solar Cells

温度是影响太阳电池性能的关键因素之一。本文采用光电耦合模型研究了温度对光子晶体型纳米结构薄膜硅太阳电池性能的影响,研究了温度对其光学吸收特性与电学特性的影响。研究发现,随着温度的升高,其光学吸收特性增强,而电学特性降低,整体转换效率降低。光学吸收的增强弥补不了电学特性的减小,因此导致整体转换效率减小。此外,我们还研究了热膨胀系数对纳米结构薄膜太阳电池性能的影响,研究发现,热膨胀系数的影响可以忽略。

Temperature is a critical factor in affecting the performance of solar cells.In this paper,photoelectric coupling model has been carried out to investigate how temperature affects the performance of thin-film solar cells with 2D nanohole photonic crystal structures.Both the temperature dependence of optical and electrical characteristics is studied.It is found that the increase of temperature is positive for optical properties whereas that is negative for electrical properties.The slight increase of optical properties can not compensate the dramatic decrease of electrical properties in nanostructured thin-film solar cells with the increase of temperature.Therefore,the power conversion efficiency decreases with increasing temperature.In addition,the effect of thermal expansion coefficient is investigated as well and the results indicate that this effect can be neglected.