Optical Memory Media Based on Excitation-Time Dependent Luminescence from a Thin Film of Semiconductor Nanocrystals
Optical Memory Media Based on Excitation-Time Dependent Luminescence from a Thin Film of Semiconductor Nanocrystals
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基于半导体纳米晶体薄膜的激发时间依赖性发光的光学存储介质
DOI：
10.1143/jjap.39.4006
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发表时间：
2000
影响因子：
1.5
通讯作者：
Y. Yamaguchi
中科院分区：
文献类型：
--
作者：
S. Maenosono;C. Dushkin;S. Saita;Y. Yamaguchi
我们描述了从密集堆积的半导体纳米晶体（量子点）的光致发光强度随激发时间的增加，这是清楚地观察到的肉眼在环境条件下。这使得第一基于发光的光学存储介质的发明对于实际应用是可行的。明亮的发光图像被存储，然后通过激发介质（一层硒化镉纳米晶体薄膜），用蓝光或紫外光读出。发光强度的增加归因于光生电子在覆盖纳米晶体的有机分子基质中的捕获和积累。
We describe the increase of photoluminescence intensity from densely packed semiconductor nanocrystals (quantum dots) with excitation time, which is clearly observed by the naked eye under ambient conditions. This enabled the invention of the first luminescence-based optical memory media feasible for practical applications. Bright luminescent images are stored and then read out by exciting the medium, a thin film of cadmium selenide nanocrystals, with blue or UV light. The increase in emission intensity is attributed to the trapping and accumulation of photo-generated electrons in the matrix of organic molecules capping the nanocrystals.