Photoluminescent and semiconductive properties of a novel praseodymium compound

Abstract

A praseodymium complex, [Pr(IA)₂(H₂O)₄]_nnCl (1) (HIA = isonicotinic acid), has been prepared via a solvothermal reaction and characterized by single crystal X-ray diffraction. The praseodymium ion is coordinated by eight oxygen atoms to form a slightly distorted square antiprismatic geometry. Complex 1 is characteristic of a one-dimensional (1 D) chain-like structure. Solid-state photoluminescence spectra reveal that complex 1 has an emission at 660 nm of the red region. This emission is probably ascribed to the characteristic emission ³P₀→³F₂ transition of the praseodymium ions. Compound 1 has CIE (Commission Internationale de I'Éclairage) chromaticity coordinates of (0.5328, 0.4653). The CCT (Correlated Color Temperature) is 2180 K for compound 1. Solid-state UV/vis diffuse reflectance spectrum reveals that complex 1 possesses a wide optical band gap of 5.08 eV.

Graphical Abstract

A praseodymium complex was prepared and characterized. It has a wide optical band gap of 5.08 eV and red photoluminescence emission at 660 nm of the characteristic emission ³P₀→³F₂ transition of the praseodymium ions. It has CIE chromaticity coordinates of (0.5328, 0.4653) and the CCT is 2180 K.

Keywords:

• Praseodymium
• photoluminescence
• lanthanide
• semiconductor
• X-ray

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

We gratefully acknowledge the financial support of the open foundation of the State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences (20180008).