HIP to be Square: Simplifying Nitridophosphate Synthesis in a Hot Isostatic Press

Abstract

(Oxo)Nitridophosphates have recently been identified as a promising compound class for application in the field of solid‐state lighting. Especially, the latest medium‐pressure syntheses under ammonothermal conditions draw attention of the semiconductor and lighting industry on nitridophosphates. In this contribution, we introduce hot isostatic presses as a new type of medium‐pressure synthetic tool, further simplifying nitridophosphate synthesis. In a second step, phosphorus nitride was replaced as starting material by red phosphorus, enabling the synthesis of Ca2PN3 as model compound, starting only from readily available compounds. Moreover, first luminescence investigations on Eu2+‐doped samples reveal Ca2PN3:Eu2+ as a promising broad‐band red‐emitter (λem=650 nm; fwhm=1972 cm−1). Besides simple handling, the presented synthetic method offers access to large sample volumes, and the underlying reaction conditions facilitate single‐crystal growth, required for excellent optical properties.

Evolutionary Generation of Phosphor Materials and Their Progress in Future Applications for Light-Emitting Diodes

“…Chemical stability can be improved by surface modification, such as surface coating and post-treatment. Meanwhile, microfluidic or nanofluidic systems can help well-proportioned morphology in/between batches. − Some advanced synthesis and analysis methods are also expected to have great potential for developing new and novel luminescent materials, such as high-pressure synthesis with Walker-type multi anvil or HIP, − single-particle diagnosis method, − synchrotron/neutron technologies, − etc. Past experience and applying new technologies are bound to provide new insights and perspectives for designing novel luminescent materials in the near future.…”