Up-conversion processes of 5d transition metal ions in crystals

被引：14

作者：

Gamelin, DR ^{[1
]}

Wermuth, M ^{[1
]}

Güdel, HU ^{[1
]}

机构：

[1] Univ Bern, Dept Chem & Biochem, CH-3000 Bern 9, Switzerland

来源：

JOURNAL OF LUMINESCENCE | 1999年 / 83-4卷

关键词：

up-conversion; Re4+; Os4+; avalanche;

D O I：

10.1016/S0022-2313(99)00134-9

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The phenomenon of photon up-conversion, widespread in lanthanide compounds, is extremely rare in transition metal compounds. We have observed near-IR (NIR) to visible (VIS) up-conversion in Ti2+, Ni2+, Mo3+, Re4+ and Os4+ doped chloride and bromide host lattices. In the system Cs2ZrCl6:Re4+ the NIR to VIS up-conversion occurs nonradiatively by energy transfer. It has a high efficiency up to room temperature. In Cs2ZrBr6:Os4+ there is efficient up-conversion below SO K by an excited-state absorption mechanism. For one specific excitation energy the typical signature of an excitation avalanche is observed, The steady-state populations for CW excitation and the excited state dynamics after pulsed excitation can be reproduced by simple rate equation models for both the Re4+ and Os4+ systems. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：405 / 410

页数：6

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