Luminescent materials as spectral converters: power dependent profiling of solid NaYF4:Yb3+,Er3+ UCNP as highly efficient nir to uva-blue emission

BEATRIZ C. BARJA; M. CLAUDIA MARCHI; JUAN M. BUJJAMER; HERNÁN E. GRECCO

CABA

Simposio; Exploring the Frontiers of Chemistry: Challenges for the 21st Century; 2019

Exactas-UBA / Ben-Gurion University

Upconversion is a common process in lanthanides-based materials in which absorption of multiple low energy photons result in a high energy one. The emission spectrum is frequently tuned by changing the composition of the material. However, a commonly overlooked aspect is the non-linear power dependence which can influence the spectral and temporal properties of the emission. Moreover, as upconverting materials have been shown to increase the output current density in photovoltaic cells when used as spectral converters, the complete power profile is required to calculate the improved efficiency and needs to be incorporated in the design process.