Micro-cone arrays enhance outcoupling efficiency in horticulture luminescent solar concentrators

Luminescent solar concentrators (LSCs) have shown the ability to realize spectral conversion, which could tailor the solar spectrum to better match photosynthesis requirements. However, conventional LSCs are designed to trap, rather than extract, spectrally converted light. Here, we propose an effective method for improving outcoupling efficiency based on protruded and extruded micro-cone arrays patterned on the bottom surface of LSCs. Using Monte Carlo ray tracing, we estimate a maximum external quantum efficiency (EQE) of 37.73% for our horticulture LSC (HLSC), correspond-ing to 53.78% improvement relative to conventional, planar LSCs. Additionally, structured HLSCs provide diffuse light, which is beneficial for plant growth. Our micro-patterned surfaces provide a solution to light trapping in LSCs and a foundation for the practical application of HLSCs.

Automated summary

An effective method for improving outcoupling efficiency of luminescent solar concentrators (LSCs) was proposed by patterning protruded and extruded micro-cone arrays on the bottom surface of LSCs. Monte Carlo ray tracing estimated a maximum external quantum efficiency (EQE) of 37.73% for the horticulture LSC (HLSC), representing a 53.78% improvement compared to conventional, planar LSCs. Additionally, structured HLSCs provide diffuse light beneficial for plant growth. The micro-patterned surfaces offer a solution to light trapping in LSCs and lay the foundation for practical applications of HLSCs.