Biomass-Derived Transparent Bamboo Composite Films with Europium-Based Photoconversion for Energy-Efficient Smart Agriculture

Abstract

The rational design of sustainable light-conversion agricultural materials is critical for enhancing solar energy utilization efficiency and advancing low-carbon farming systems. In this study, we propose a biomass-derived composite strategy by integrating transparent bamboo (TB), a natural, renewable substrate, with the europium-based luminescent complex Eu(hfa)₃(TPPO)₂ to fabricate a flexible photoactive transparent bamboo (PTB) that synergistically combines light-conversion functionality and enhanced mechanical robustness. Experimental results demonstrate that PTB achieves 86.3% transparency and efficient UV-to-red light conversion, effectively transforming UV radiation harmful to plants into photosynthetically active red light. Moreover, PTB exhibits excellent thermal stability and a longitudinal tensile strength of 100.5 MPa, surpassing conventional petroleum-based agricultural films. Growth experiments on Arabidopsis thaliana reveal that PTB coverage significantly improves plant photochemical efficiency (Fv/Fm) and biomass accumulation: 28.6% more leaves, 108.6% higher fresh weight, and 118.2% increased dry weight compared to controls. This work provides a biomass-based design paradigm for eco-compatible agricultural photonic materials, demonstrating promising potential in energy-saving smart agriculture and sustainable crop production.

Keywords

energy-saving / photoconversion / sustainable / transparent bamboo

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RIGHTS & PERMISSIONS

2025 The Author(s). Energy & Environmental Materials published by John Wiley & Sons Australia, Ltd on behalf of Zhengzhou University.