Photoluminescent materials for solar spectral conversion greenhouse films

Abstract

Crops struggle with efficiently harnessing solar energy, primarily because their absorption spectra mismatch with terrestrial solar spectra. To improve the sunlight utilization efficiency of the photosynthetic process, it is necessary to convert the less photosynthetically active light into the most photosynthetically active light. The most direct and economical way to achieve solar spectral conversion (SSC) is to use photoluminescent materials, which are called light-conversion auxiliaries (LCAs) in agriculture. This review discusses the basic requirements of LCAs for SSC, focusing on agricultural conversion techniques aimed at optimizing the spectral composition required for crop growth through LCAs, therefore improving photosynthetic efficiency and crop productivity. This paper introduces the classification of LCAs for solar greenhouse, summarizes the different types of solar greenhouse phosphors and their application strategies and methods, and discusses the economic and environmental benefits of LCAs used in solar greenhouses.