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On the Mechanistic Understanding of Photovoltage Loss in Iron Pyrite Solar Cells.
Advanced Materials ( IF 27.4 ) Pub Date : 2020-05-19 , DOI: 10.1002/adma.201905653 Mohammad Rahman 1 , Gerrit Boschloo 2 , Anders Hagfeldt 3 , Tomas Edvinsson 1
Advanced Materials ( IF 27.4 ) Pub Date : 2020-05-19 , DOI: 10.1002/adma.201905653 Mohammad Rahman 1 , Gerrit Boschloo 2 , Anders Hagfeldt 3 , Tomas Edvinsson 1
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Considering the natural abundance, the optoelectronic properties, and the electricity production cost, iron pyrite (FeS2) has a strong appeal as a solar cell material. The maximum conversion efficiency of FeS2 solar cells demonstrated to date, however, is below 3%, which is significantly below the theoretical efficiency limit of 25%. This poor conversion efficiency is mainly the result of the poor photovoltage, which has never exceeded 0.2 V with a device having appreciable photocurrent. Several studies have explored the origin of the low photovoltage in FeS2 solar cells, and have improved understanding of the photovoltage loss mechanisms. Fermi level pinning, surface inversion, ionization of bulk donor states, and photocarrier loss have been suggested as the underlying reasons for the photovoltage loss in FeS2. Given the past and more recent scientific data, together with contradictory results to some extent, it is timely to discuss these mechanisms to give an updated view of the present status and remaining challenges. Herein, the current understanding of the origin of low photovoltage in FeS2 solar cells is critically reviewed, preceded by a succinct discussion on the electronic structure and optoelectronic properties. Finally, suggestions of a few research directions are also presented.
中文翻译：
关于铁黄铁矿太阳能电池中光电压损失的机理理解。
考虑到自然丰度，光电性能和电力生产成本，黄铁矿（FeS 2）作为太阳能电池材料具有很强的吸引力。然而，迄今为止证明的FeS 2太阳能电池的最大转换效率低于3％，大大低于理论效率极限25％。这种较差的转换效率主要是由于较差的光电压所致，在具有相当大的光电流的设备中，光电压从未超过0.2V。多项研究探索了FeS 2中低光电压的起源太阳能电池，并且对光电压损耗机理有了更深入的了解。费米能级钉扎，表面反转，本体供体态的电离和光载流子损失已被建议作为FeS 2中光电压损失的根本原因。鉴于过去和最近的科学数据，以及在一定程度上相互矛盾的结果，现在应该讨论这些机制，以提供有关当前状况和剩余挑战的最新观点。在此，对有关FeS 2太阳能电池中低光电压成因的当前理解进行了严格的回顾，随后对电子结构和光电特性进行了简要讨论。最后，提出了一些研究方向的建议。
更新日期：2020-07-01
中文翻译：
关于铁黄铁矿太阳能电池中光电压损失的机理理解。
考虑到自然丰度，光电性能和电力生产成本，黄铁矿（FeS 2）作为太阳能电池材料具有很强的吸引力。然而，迄今为止证明的FeS 2太阳能电池的最大转换效率低于3％，大大低于理论效率极限25％。这种较差的转换效率主要是由于较差的光电压所致，在具有相当大的光电流的设备中，光电压从未超过0.2V。多项研究探索了FeS 2中低光电压的起源太阳能电池，并且对光电压损耗机理有了更深入的了解。费米能级钉扎，表面反转，本体供体态的电离和光载流子损失已被建议作为FeS 2中光电压损失的根本原因。鉴于过去和最近的科学数据，以及在一定程度上相互矛盾的结果，现在应该讨论这些机制，以提供有关当前状况和剩余挑战的最新观点。在此，对有关FeS 2太阳能电池中低光电压成因的当前理解进行了严格的回顾，随后对电子结构和光电特性进行了简要讨论。最后，提出了一些研究方向的建议。
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