Bernardes Sara, Lameirinhas Ricardo A Marques, Torres João Paulo N, Fernandes Carlos A F
Department of Electrical and Computer Engineering, Instituto Superior Técnico, 1049-001 Lisbon, Portugal.
Instituto de Telecomunicações, 1049-001 Lisbon, Portugal.
Nanomaterials (Basel). 2021 Jan 1;11(1):78. doi: 10.3390/nano11010078.
The world is witnessing a tide of change in the photovoltaic industry like never before; we are far from the solar cells of ten years ago that only had 15-18% efficiency. More and more, multi-junction technologies seem to be the future for photovoltaics, with these technologies already hitting the mark of 30% under 1-sun. This work focuses especially on a state-of-the-art triple-junction solar cell, the GaInP/GaInAs/Ge lattice-matched, that is currently being used in most satellites and concentrator photovoltaic systems. The three subcells are first analyzed individually and then the whole cell is put together and simulated. The typical figures-of-merit are extracted; all the I-V curves obtained are presented, along with the external quantum efficiencies. A study on how temperature affects the cell was done, given its relevance when talking about space applications. An overall optimization of the cell is also elaborated; the cell's thickness and doping are changed so that maximum efficiency can be reached. For a better understanding of how varying both these properties affect efficiency, graphic 3D plots were computed based on the obtained results. Considering this optimization, an improvement of 0.2343% on the cell's efficiency is obtained.
世界正见证着光伏产业前所未有的变革浪潮；我们已远离十年前效率仅为15% - 18%的太阳能电池。多结技术似乎越来越成为光伏的未来发展方向，这些技术在标准测试条件下已达到30%的效率。这项工作特别聚焦于一种先进的三结太阳能电池，即晶格匹配的GaInP/GaInAs/Ge，目前它被用于大多数卫星和聚光光伏系统中。首先分别分析三个子电池，然后将整个电池组合起来进行模拟。提取典型的品质因数；展示所有获得的I - V曲线以及外部量子效率。鉴于温度在空间应用中的相关性，开展了关于温度如何影响电池的研究。还阐述了对电池的整体优化；改变电池的厚度和掺杂，以达到最高效率。为了更好地理解改变这两个特性如何影响效率，根据所得结果计算了三维图形。考虑到这种优化，电池效率提高了0.2343%。
