Microstructure Engineered Photon‐Managing Films for Solar Energy to Biomass Conversion

Author:

Shen Lihua12ORCID,Lou Runnan2,Aili Ablimit2,Huggins Curtis James2,Yin Xiaobo234ORCID

Affiliation:

1. MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter School of Physics Xi'an Jiaotong University Xi'An 710049 P. R. China

2. Department of Mechanical Engineering University of Colorado Boulder CO 80309 USA

3. Materials Science and Engineering Program University of Colorado Boulder CO 80309 USA

4. Department of Mechanical Engineering The University of Hong Kong Hong Kong 999077 China

Abstract

AbstractConversion of solar energy into chemical energy through natural photosynthesis plays a crucial role in sustainable energy transformation, bioresource production, and CO2 biofixation. Nevertheless, the overall solar energy to chemical energy (biomass) conversion efficiency in the photosynthetic organisms is still unsatisfactory because of their inefficient utilization of solar light. Here, a photonic method to improve photosynthesis of a unicellular green microalga, Chlamydomonas reinhardtii, a photosynthetic organism model is reported. For this purpose, an easy‐to‐fabricate microphotonic film is developed to improve the spectral quality of solar light reaching the microalgae through photon management (i.e., simultaneous solar spectral conversion and directional fluorescent emission). This study demonstrates that the short‐term oxygen evolution rate and the long‐duration biomass production of microalgae in 200‐mL laboratory photobioreactors are enhanced by a factor of 38% and 54%, respectively. In 5000‐mL scaled‐up bubble column photobioreactors placed outdoor under natural sunlight and weather conditions, the biomass yield is improved by more than 20% when compared to the control experiments conducted in parallel in an optically clear bubble column photobioreactor. Based on such experimental observations, the work here demonstrates the potential of photon management for promoting the solar energy‐to‐biomass conversion process of microalgae and other photosynthetic organisms.

Publisher

Wiley

Subject

General Materials Science,Renewable Energy, Sustainability and the Environment

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