State-of-the-Art Perovskite Solar Cells Benefit from Photon Recycling at Maximum Power Point

Abstract

Photon recycling is required for a solar cell to achieve an open-circuit voltage ($V_{OC}$) and power conversion efficiency (PCE) approaching the Shockley-Queisser theoretical limit. In metal halide perovskite solar cells, the achievable performance gains from photon recycling remain uncertain due to high variability in perovskite material quality and the non-radiative recombination rate ($k_1$). In this work, we study state-of-the-art ${\text{Cs}}_{0.05}({\text{MA}}_{0.17}{\text{FA}}_{0.83}{)}_{0.95}\text{Pb}({\text{I}}_{0.83}{\text{Br}}_{0.17}{)}_3$ films and analyze the impact of varying non-radiative recombination rates on photon recycling and device performance. Importantly, we predict the impact of photon recycling at the maximum power point (MPP), demonstrating an absolute PCE increase of up to 2.0% in the radiative limit, primarily due to a 77 mV increase in $V_{MPP}$. Even with finite non-radiative recombination, benefits from photon recycling can be achieved when non-radiative lifetimes and external LED electroluminescence efficiencies measured at open-circuit, $Q_e^{LED}({\text{V}}_{OC})$, exceed 2 $\mu$s and 10%, respectively. This analysis clarifies the opportunity to fully exploit photon recycling to push the real-world performance of perovskite solar cells toward theoretical limits.

arXiv commentMain text: 16 pages and 6 figures, SI: 22 pages and 21 figures

References in corpus (3)

• Intense Internal and External Fluorescence as Solar Cells Approach the Shockley-Queisser Efficiency Limit
• Direct Measurement of Auger Electrons Emitted from a Semiconductor Light-Emitting Diode under Electrical Injection: Identification of the Dominant Mechanism for Efficiency Droop
• Rigorous Treatment of Photon Recycling in Thermodynamics of Photovoltaics: The Case of Perovskite Thin-Film Solar Cells

Cited by in corpus (1)

• Shining Light on Photoluminescence Properties of Metal Halide Perovskites