Title: Thermodynamics of photoelectric devices Show Chinese title

Title: 光电设备的热力学

Abstract: We study the nonequilibrium steady state thermodynamics of a photodevice which can operate as a solar cell or a photoconductor, depending on the degree of asymmetry of the junction. The thermodynamic efficiency is captured by a single coefficient of performance. Using a minimal model based on a two-level system, we show that when the Coulomb interaction energy matches the transport gap of the junction, the photoconductor displays maximal response, performance, and signal-to-noise ratio, while the same regime is always detrimental for the solar cell. Nevertheless, we find that the Coulomb interaction is beneficial for the solar cell performance if it lies below the transport gap. Our work sheds important light on design principles for thermodynamically efficient photodevices in the presence of Coulomb interactions. Show Chinese abstract

Abstract: 我们研究了光电器件的非平衡稳态热力学，该器件可以根据结的不对称程度作为太阳能电池或光电导体运行。 热力学效率由一个性能系数来描述。 使用基于双能级系统的最小模型，我们表明当库仑相互作用能与结的输运带隙匹配时，光电导体表现出最大响应、性能和信噪比，而同一模式对太阳能电池总是不利的。 然而，我们发现如果库仑相互作用低于输运带隙，它对太阳能电池的性能是有益的。 我们的工作在存在库仑相互作用的情况下，为热力学高效的光电器件的设计原则提供了重要启示。