Ultra-high photoluminescent quantum yield of β-NaYF4: 10% Er3+ via broadband excitation of upconversion for photovoltaic devices
Ultra-high photoluminescent quantum yield of β-NaYF4: 10% Er3+ via broadband excitation of upconversion for photovoltaic devices
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DOI：
10.1364/oe.20.00a879
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发表时间：
2012-11-05
期刊：
影响因子：
3.8
通讯作者：
Richards, Bryce S.
中科院分区：
文献类型：
--
作者：
MacDougall, Sean K. W.;Aruna, Ivaturi;Richards, Bryce S.
测量了掺铒六方晶系氟化钇钠（beta-NaYF 4：10%Er3+）在宽带激发下的上转换光致发光量子产率（PLQY），半峰全宽范围为12 ~ 80 nm。开发了一种新的方法来增加激发的带宽，同时通过归一化到空气质量1.5直接太阳光谱来保持与功率无关。测量结果表明，通过加宽激发光谱，可以在较低的太阳能浓度下实现较高的PLQY。在2270 +/- 100 mW mm（-2）下实现了16.2 +/- 0.5%的最高PLQY，并且是有史以来测量的最高PLQY。(C)2012美国光学学会
The upconversion photoluminescent quantum yield (PLQY) of erbium-doped hexagonal sodium yttrium fluoride (beta-NaYF4: 10% Er3+) was measured under broadband excitation with full width half maxima ranging from 12 to 80 nm. A novel method was developed to increase the bandwidth of excitation, while remaining independent of power via normalization to the air mass 1.5 direct solar spectrum. The measurements reveal that by broadening the excitation spectrum a higher PLQY can be achieved at lower solar concentrations. The highest PLQY of 16.2 +/- 0.5% was achieved at 2270 +/- 100 mW mm(-2) and is the highest ever measured. (C) 2012 Optical Society of America