Samaryum ve tulyum katkılı lüminesan cam bazlı LED'lerin iç mekan tarım uygulamalarında kullanımları ve bitki gelişimine etkileri

Tez Türü: Yüksek Lisans

Tezin Yürütüldüğü Kurum: Yıldız Teknik Üniversitesi, Kimya-Metalurji Fakültesi, Met.ve Malzeme Müh.Böl., Türkiye

Tez Danışmanı: Ali Erçin Ersundu

Tezin Onay Tarihi: 2023

Tezin Dili: İngilizce

Desteklendiği Program: Diğer

Özet:

This study addresses the challenges of sustainable and productive agricultural practices facing climate change and the destruction of agricultural land. For this purpose, the development of a new plant-growth LED based on Sm3+ and Tm3+ added phosphorus glasses with blue and red-lighting color conversion properties is offered. This LED aims to increase the growth rate of plants by increasing the rate of photosynthesis and the intensity of photosynthetically active radiation reaching crop pigments. A remarkable 56% photoluminescence quantum yield (PLQY) is produced by the designed LED, which has photoluminescence (PL) peak positions between 454 and 648 nm and spectrum coverage of 50% and 39% of the chlorophyll a and b absorption areas, respectively. Additionally, the developed plant growth LED has outstanding qualities, remaining unaffected by temperature changes and prolonged operating times. The designed LED exhibits notable improvements in plant growth characteristics, including increased plant height, weight, number of leaves, and enhanced levels of chlorophyll a, chlorophyll b, and carotenoid content, while the root diameter is decreased, and the shoot-to-root ratio is diminished in comparison to the commercially available plant growth LED. The performance of a Sm3+ and Tm3+ co-doped luminescent glass-based plant growth LED is also compared to that of other published plant growth LED designs that use various luminescent materials, while also examining the effects of PLQY, PL location, and plant growing circumstances. The findings imply that the developed LED system provides a more effective and environmentally friendly method of lighting for indoor horticulture and has important implications for supplying the rising global population's expanding want for food.