Eu2+-Nd3+ co-doped glasses for solar spectrum modification via NUV/visible to NIR downconversion
| Autor: | Jurandir H. Rohling, Robson Ferrari Muniz, F. Pedrochi, V. S. Zanuto, L.M. Azevedo, Mauro Luciano Baesso, A.N. Medina, A. Steimacher |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
business.industry Mechanical Engineering Metals and Alloys chemistry.chemical_element Laser Emission intensity Neodymium law.invention chemistry Mechanics of Materials law Solar cell Materials Chemistry Optoelectronics Energy level Energy transformation business Absorption (electromagnetic radiation) Excitation |
| Zdroj: | Journal of Alloys and Compounds. 888:161484 |
| ISSN: | 0925-8388 |
| DOI: | 10.1016/j.jallcom.2021.161484 |
| Popis: | The challenge of modifying the solar spectrum intensifies efforts in the pursuit of enhanced materials and optical systems. In this work, we present novel and efficient near infrared-emitting Eu2+ and Nd3+ co-doped sodium calcium silicate glasses. Optical absorption, excitation spectra, emission decay time, were measured and discussed as a function of Nd2O3 content. Laser power-dependent emission intensity was used to evaluate the transfer mechanism, and an energy level diagram was proposed. For the sample doped with optimized neodymium content, energy transfer efficiency reached 70%. For co-doped samples, the excitation spectrum was broadly intense and perfectly overlapped with the solar spectrum in the NUV region. Therefore, NUV/Visible can be efficiently converted into NIR, precisely where the C-Si response is maximal, through the Eu2+→Nd3+ pathway. This work’s outcomes made the focused materials worthy for solar cell applications, optimizing energy conversion lost by thermalization, into useful energy. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect