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http://hdl.handle.net/2080/4222
Title: | Lanthanide-Based Deep Red-Emitting Phosphors for Hybrid White LEDs and Plant Growth Applications |
Authors: | Pradhan, Priyadarshini Vaidyanathan, Sivakumar |
Keywords: | Eu3+ red phosphors Hybrid w-LED Plant growth Latent Fingerprint |
Issue Date: | Dec-2023 |
Citation: | 34th Annual General Meeting of MRSI and 5th Indian Materials conclave, IIT (BHU), Varanasi, 12-15 December 2023 |
Abstract: | Phosphor based white LEDs (w-LED) have accomplished more consideration in modern technology to save energy and are widely used for versatile applications. A crucial and essential component in increasing the overall efficiency of the w-LED is the oxide based narrow band red emitting phosphor. In this regard, a series of Eu3+ -activated Na2La4(WO4)7 (NLW) red emitting phosphors were synthesized employing a solid-state approach, and their optical characteristics were thoroughly investigated. All compositions crystallize in a tetragonal structure with I41/a space group. Sharp red emission was exhibited by all the NLW:Eu3+ phosphors ∼616 nm owing to the ED transition (5D0→7 F2), under the excitation of 394 nm and observed concentration quenching when x = 0.8. In addition, the color purity and IQE of NLW:0.8Eu3+ phosphor were found to be 96.79% and 83.76%, respectively. The thermal stability of the phosphor is found to be 69.75% at 423 K according to a temperaturedependent PL analysis. Practical utility of the synthesized phosphors were determined by fabricating red and white LEDs. Moreover, latent fingerprint application is possible with this Eu3+ -doped red phosphors. Additionally, red/deep red LEDs were made for plant growth application by synthesizing simultaneous activation of Sm3+ and Eu3+ in NLW phosphors. These results indicated that the synthesized phosphors would be good phosphors for applications related to w-LED, latent fingerprint, and plant growth. |
Description: | Copyright belongs to proceeding publisher |
URI: | http://hdl.handle.net/2080/4222 |
Appears in Collections: | Conference Papers |
Files in This Item:
File | Description | Size | Format | |
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2023_MRSI_PPradhan_Lanthanide-based.pdf | 4.63 MB | Adobe PDF | View/Open Request a copy |
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