Jarosz Grażyna, Signerski Ryszard
Institute of Physics and Applied Computer Science, Faculty of Applied Physics and Mathematics, Gdansk University of Technology, ul. G. Narutowicza 11/12, 80-233 Gdańsk, Poland.
iScience. 2024 Dec 15;28(1):111604. doi: 10.1016/j.isci.2024.111604. eCollection 2025 Jan 17.
The procedure for determining the maximum power of a single-junction photovoltaic cell operating in various types of lighting is presented. This is a key issue for photovoltaics powering the mobile Internet-of-Things (IoT). The simulations performed are based on the detailed balance principle, without any of the simplifying assumptions included in the Shockley-Queisser model. Optimal energy bandgap for diffuse solar light was found to be 1.64 eV with a cutoff generated power of 37.3 W/m. For the LED lighting considered in this work, the optimal energy bandgap and maximum power limit are 1.86 eV, 1.63 W/m, and 1.79 eV, 1.51 W/m for cool and warm lighting, respectively, at 900 lux. Considering that the maximum power limit of diffuse solar radiation is much higher than the limit for LED lighting, we concluded that 1.64 eV is the optimal bandgap for most mobile IoT devices operating outdoors all or almost all the time.
本文介绍了确定在各种类型光照下工作的单结光伏电池最大功率的方法。这是为移动物联网（IoT）供电的光伏技术的一个关键问题。所进行的模拟基于详细平衡原理，没有包含肖克利 - 奎塞尔模型中的任何简化假设。发现漫射太阳光的最佳能带隙为1.64电子伏特，截止发电功率为37.3瓦/平方米。对于本文所考虑的LED照明，在900勒克斯时，冷光和暖光的最佳能带隙和最大功率极限分别为1.86电子伏特、1.63瓦/平方米和1.79电子伏特、1.51瓦/平方米。考虑到漫射太阳辐射的最大功率极限远高于LED照明的极限，我们得出结论，对于几乎所有时间都在户外运行的大多数移动物联网设备而言，1.64电子伏特是最佳能带隙。
