In:
Dalton Transactions, Royal Society of Chemistry (RSC), Vol. 50, No. 36 ( 2021), p. 12570-12582
Abstract:
Although it has been extensively studied for decades, the α-Al 2 O 3 :Cr 3+ phosphor has rarely been investigated for horticultural lighting. In this work, for the first time, a prototype of a plant growth light-emitting diode (LED) has been fabricated by coating a deep-red-emitting α-Al 2 O 3 :Cr 3+ phosphor onto a near-ultraviolet (NUV) chip. The α-Al 2 O 3 :Cr 3+ phosphor, synthesized by a co-precipitation method and annealed at 1500 °C for 2 h, emits an outstanding narrow peak at 695 nm. The α-Al 2 O 3 :0.6%Cr 3+ phosphor shows a high activation energy of 0.29 eV, a long lifetime of 3.4 ms, and a superior color purity of 100%. The chromatic coordinates and the QE value of the red LED obtained by coating an α-Al 2 O 3 :0.6%Cr 3+ phosphor on a NUV chip are ( x = 0.5650, y = 0.2429) and 87.1%, respectively.
Type of Medium:
Online Resource
ISSN:
1477-9226
,
1477-9234
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2021
detail.hit.zdb_id:
1472887-4
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