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On the use of graphene to improve the performance of concentrator III‐V multijunction solar cells
Progress in Photovoltaics ( IF 8.0 ) Pub Date : 2019-11-03 , DOI: 10.1002/pip.3207 Laura Barrutia 1 , Iván Lombardero 1 , Mario Ochoa 1 , Mercedes Gabás 1, 2 , Iván García 1 , Tomás Palacios 3 , Andrew Johnson 4 , Ignacio Rey‐Stolle 1 , Carlos Algora 1
Progress in Photovoltaics ( IF 8.0 ) Pub Date : 2019-11-03 , DOI: 10.1002/pip.3207 Laura Barrutia 1 , Iván Lombardero 1 , Mario Ochoa 1 , Mercedes Gabás 1, 2 , Iván García 1 , Tomás Palacios 3 , Andrew Johnson 4 , Ignacio Rey‐Stolle 1 , Carlos Algora 1
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Graphene has been intensively studied in photovoltaics focusing on emerging solar cells based on thin films, dye‐sensitized solar cells, quantum dots, nanowires, and so forth. However, the typical efficiency of these solar cells incorporating graphene is below 16%. Therefore, the photovoltaic potential of graphene has not yet been shown. In this work, the use of graphene for concentration applications on III‐V multijunction solar cells, which indeed are the solar cells with the highest efficiency, is demonstrated. First, a wide optoelectronic characterization of graphene layers is carried out. Then, the graphene layer is incorporated onto triple‐junction solar cells, which decreases their series resistance by 35% (relative), leading to an increase in fill factor of 4% (absolute) at concentrations of 1000 suns. Simultaneously, the optical absorption of graphene produces a relative short‐circuit current density decrease in the range of 0% to 1.8%. As a result, an absolute efficiency improvement close to 1% at concentrations of 1000 suns was achieved with respect to triple‐junction solar cells without graphene. The impact of incorporating one and two graphene monolayers is also evaluated.
中文翻译：
关于使用石墨烯改善聚光器III‐V多结太阳能电池的性能
石墨烯已在光伏领域进行了深入研究，重点研究了基于薄膜的新兴太阳能电池，染料敏化太阳能电池，量子点，纳米线等。然而，这些掺入石墨烯的太阳能电池的典型效率低于16％。因此，尚未显示出石墨烯的光伏电势。在这项工作中，展示了将石墨烯用于III-V多结太阳能电池（实际上是效率最高的太阳能电池）的浓缩应用。首先，对石墨烯层进行了广泛的光电表征。然后，将石墨烯层结合到三结太阳能电池上，这会使串联电阻降低35％（相对），导致在1000个太阳浓度下填充系数增加4％（绝对值）。同时，石墨烯的光吸收会导致短路电流密度在0％至1.8％范围内下降。结果，相对于没有石墨烯的三结太阳能电池，在1000个太阳的浓度下，绝对效率提高了接近1％。还评估了掺入一层和两层石墨烯单层的影响。
更新日期：2019-11-03
中文翻译：
关于使用石墨烯改善聚光器III‐V多结太阳能电池的性能
石墨烯已在光伏领域进行了深入研究，重点研究了基于薄膜的新兴太阳能电池，染料敏化太阳能电池，量子点，纳米线等。然而，这些掺入石墨烯的太阳能电池的典型效率低于16％。因此，尚未显示出石墨烯的光伏电势。在这项工作中，展示了将石墨烯用于III-V多结太阳能电池（实际上是效率最高的太阳能电池）的浓缩应用。首先，对石墨烯层进行了广泛的光电表征。然后，将石墨烯层结合到三结太阳能电池上，这会使串联电阻降低35％（相对），导致在1000个太阳浓度下填充系数增加4％（绝对值）。同时，石墨烯的光吸收会导致短路电流密度在0％至1.8％范围内下降。结果，相对于没有石墨烯的三结太阳能电池，在1000个太阳的浓度下，绝对效率提高了接近1％。还评估了掺入一层和两层石墨烯单层的影响。
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