Abstract
We present an optical model implemented in the commercial software SETFOS 4.6 for simulating perovskite/silicon monolithic tandem solar cells that exploit light scattering structures. In a first step we validate the model with experimental data of tandem solar cells that either use front- or rear-side textures and extract the internal quantum efficiency of the methyl-ammonium lead iodide (MALI) perovskite sub-cell. In a next step, the software is used to investigate the potential of different device architectures featuring a monolithic integration between the perovskite and silicon sub-cells and exploiting rear- as well as front-side textures for improved light harvesting. We find that, considering the available contact materials, the p-i-n solar cell architecture is the most promising with respect to achievable photocurrent for both flat and textured wafers. Finally, cesium-formamidinium-based perovskite materials with several bandgaps were synthetized, optically characterized and their potential in a tandem device was quantified by simulations. For the simulated layer stack and among the tested materials with bandgaps of 1.7 and 1.6 eV, the one with 1.6 eV bandgap was found to be the most promising, with a potential of reaching a power conversion efficiency of 31%. In order to achieve higher efficiencies using higher band-gap materials, parasitic absorptance in the blue spectral range should be further reduced.
Highlights
While the power conversion efficiency of silicon heterojunction solar cells has surpassed 26% [1], a novel route to high-efficiency wafer-based solar cells is being pursued with perovskite/silicon tandems [2], with monolithic devices having reached 23.6% [3] and 4terminal configurations exceeding 26% [4, 5] with potential to come close to an efficiency of 30%
We present an optical model implemented in the commercial software SETFOS 4.6 for simulating perovskite/silicon monolithic tandem solar cells that exploit light scattering structures
In a first step we validate the model with experimental data of tandem solar cells that either use front- or rear-side textures and extract the internal quantum efficiency of the methyl-ammonium lead iodide (MALI) perovskite sub-cell
Summary
While the power conversion efficiency of silicon heterojunction solar cells has surpassed 26% [1], a novel route to high-efficiency wafer-based solar cells is being pursued with perovskite/silicon tandems [2], with monolithic devices having reached 23.6% [3] and 4terminal configurations exceeding 26% [4, 5] with potential to come close to an efficiency of 30%. State-of-the-art devices usually combine thick incoherent layers, thin coherent layers and scattering structures, making the optical simulation challenging. Only very few studies simulating state-of-the-art tandem devices have been published so far [7, 8]. Most of these studies are usually lacking comparisons with experimental studies
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
