Van der Waals Materials for Atomically-Thin Photovoltaics: Promise and Outlook,ACS Photonics

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Van der Waals Materials for Atomically-Thin Photovoltaics: Promise and Outlook
ACS Photonics ( IF 6.5 ) Pub Date : 2017-11-01 00:00:00 , DOI: 10.1021/acsphotonics.7b01103
Deep Jariwala ₁ , Artur R. Davoyan ₁ , Joeson Wong ₁ , Harry A. Atwater ₁

Affiliation

Two-dimensional (2D) semiconductors provide a unique opportunity for optoelectronics due to their layered atomic structure and electronic and optical properties. To date, a majority of the application-oriented research in this field has been focused on field-effect electronics as well as photodetectors and light emitting diodes. Here we present a perspective on the use of 2D semiconductors for photovoltaic applications. We discuss photonic device designs that enable light trapping in nanometer-thickness absorber layers, and we also outline schemes for efficient carrier transport and collection. We further provide theoretical estimates of efficiency indicating that 2D semiconductors can indeed be competitive with and complementary to conventional photovoltaics, based on favorable energy bandgap, absorption, external radiative efficiency, along with recent experimental demonstrations. Photonic and electronic design of 2D semiconductor photovoltaics represents a new direction for realizing ultrathin, efficient solar cells with applications ranging from conventional power generation to portable and ultralight solar power.

中文翻译：

Van der Waals原子薄型光伏材料的前景与展望

二维（2D）半导体由于其分层的原子结构以及电子和光学特性而为光电子学提供了独特的机会。迄今为止，该领域的大多数面向应用的研究都集中在场效应电子器件以及光电检测器和发光二极管上。在这里，我们介绍了将2D半导体用于光伏应用的观点。我们讨论了使光能捕获在纳米厚度吸收层中的光子器件设计，并且还概述了有效载流子传输和收集的方案。我们进一步提供效率的理论估算值，表明基于有利的能带隙，吸收，外部辐射效率，二维半导体确实可以与常规光伏电池竞争并互补。以及最近的实验演示。二维半导体光伏的光子和电子设计代表了实现超薄，高效太阳能电池的新方向，其应用范围从常规发电到便携式和超轻型太阳能。

更新日期：2017-11-01

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