The Emergence of Intense Near-infrared Photoluminescence by Photoactivation of Silver Nanoclusters

The Emergence of Intense Near-infrared Photoluminescence by Photoactivation of Silver Nanoclusters
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银纳米团簇光活化产生强近红外光致发光

DOI：
10.1039/d1cc02119b
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发表时间：
2021
期刊：
Chem. Commun
影响因子：
--
通讯作者：
T. Nakashima
T. Nakashima
中科院分区：
--
文献类型：
--
作者：
W. Ishii;S. Katao;Y. Nishikawa;Y. Okajima;A. Hatori;M. Ehara;T. Kawai;T. Nakashima

文献摘要

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Ag29纳米团簇(NCS)的吡啶溶液在680 nm处激发了近红外(NIR)的红色光致发光(PL)，在770 nm处获得了33%的PL量子产率(PLQY)。掺金银纳米管的使用进一步提高了800 nm处PLQY的45%以上。光照射可以引起NCS中电荷局域化的改变，导致近红外发射点的形成。
Photoirradiation of a pyridine solution of Ag29 nanoclusters (NCs) with red photoluminescence (PL) at 680 nm activated intense PL in the near infrared (NIR) region, giving a PL quantum yield (PLQY) of 33% at 770 nm. The use of Au-doped silver NCs further boosted the PLQY to more than 45% at 800 nm. Photoirradiation is considered to induce a change in the charge localization in the NCs, leading to the formation of NIR emitting sites.