Rigorous wave-optical treatment of photon recycling in thermodynamics of photovoltaics: Perovskite thin-film solar cells

摘要: The establishment of a rigorous theory on thermodynamics light management in photovoltaics that accommodates various loss mechanisms as well wave-optical effects the absorption and reemission is at stake this contribution. To end, we propose theoretical framework for rigorously calculating open-circuit voltage enhancement resulting from photon recycling ($\Delta V^{\mathrm{PR}}_{\mathrm{oc}}$). It can be applied to both planar thin-film nanostructured single-junction solar cells. We derive an explicit expression $\Delta V^{\mathrm{PR}}_{\mathrm{oc}}$, which reveals its dependence internal quantum luminescence efficiency, parasitic reabsorption, escape probabilities reemmited photons. While efficiency intrinsic material property, latter quantities determined arbitrary cell architecture by three-dimensional electrodynamic dipole emission calculations. demonstrate strengths validity our determining impact $V_{\mathrm{oc}}$ conventional organo-metal halide perovskite compare it established reference cases with perfect antireflection Lambertian scattering. Our calculations reveal V^{\mathrm{PR}}_{\mathrm{oc}}$ values up 80 mV considered device stack absence angular restriction 240 when cone above restricted $\theta_{\mathrm{out}}=2.5^\circ$ around normal. These improvements impose severe constraints reabsorption probability only 2\% reduces 100 same restriction. work here used provide design guidelines benefit recycling.