Effects of resonances and surface texturing on light emission in emerging thin-film devices

Pyry Kivisaari; Mikko Partanen; Jani Oksanen

doi:10.1117/12.2692230

11 March 2024 Effects of resonances and surface texturing on light emission in emerging thin-film devices

Pyry Kivisaari, Mikko Partanen, Jani Oksanen

Proceedings Volume 12880, Physics and Simulation of Optoelectronic Devices XXXII; 128800N (2024) https://doi.org/10.1117/12.2692230
Event: SPIE OPTO, 2024, San Francisco, California, United States

Abstract

Recent developments in thin-film fabrication and processing open up interesting possibilities for both established and emerging optics technologies. There, one of the key questions requiring more complete understanding is by how much one can improve the performance of thin-film devices by utilizing resonance effects and surface texturation. In this work, we report on our recent theoretical investigations around two aspects of this question: (1) how much the overall (=angle and energy-integrated) emission of extremely thin (~ 10 nm) layers can be enhanced through cavity effects, and (2) how much resonances effect the emission of moderately thin (> 100 nm) layers in a typical device interacting with free space (in this case an ultra-thin solar cell). Beginning with topic (1), we find that the total emission of active layers with thicknesses < 50 nm in particular can be boosted through resonant effects by placing them in a cavity. For topic (2), the results indicate that a radiative transfer approach (i.e., one not accounting for resonant effects) can give even quantitatively accurate predictions of the total emission of moderately thin layers in a thin-film device, as long as the reflectances of the device's outer boundaries are known, and the emitting layer is not very close to optical elements supporting direct evanescent coupling (such as metal mirrors). Finally, we demonstrate that extending the self-consistent radiative transfer-drift-diffusion approach for diffusive scattering presents an interesting tool to optimize thin-film devices even with textured surfaces.

Conference Presentation

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Pyry Kivisaari, Mikko Partanen, and Jani Oksanen "Effects of resonances and surface texturing on light emission in emerging thin-film devices", Proc. SPIE 12880, Physics and Simulation of Optoelectronic Devices XXXII, 128800N (11 March 2024); https://doi.org/10.1117/12.2692230

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