有机小分子量子点发射的在线光致图案生成

2018/01/31   下载量： 1 次

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应用领域 其他
检测样本 其他
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参考标准 暂无

采用Ekspla公司的Atlantic型号工业级皮秒激光器，利用266nm输出，进行了有机小分子量子点发射的在线光致图案生成的研究

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Nanostructured composites of inorganic and organic materials are attracting extensive interest for electronic
and optoelectronic device applications. Here we report a novel method for the fabrication and patterning
of metal selenide nanoparticles in organic semiconductor films that is compatible with solution
processable large area device manufacturing. Our approach is based upon the controlled in situ
decomposition of a cadmium selenide precursor complex in a film of the electron transporting material
1,3,5-tris(N-phenyl-benzimidazol-2-yl)-benzene (TPBI) by thermal and optical methods. In particular, we
show that the photoluminescence quantum yield (PLQY) of the thermally converted CdSe quantum dots
(QDs) in the TPBI film is up to 15%. We also show that laser illumination can form the QDs from the precursor.
This is an important result as it enables direct laser patterning (DLP) of the QDs. DLP was performed
on these nanocomposites using a picosecond laser. Confocal microscopy shows the formation of
emissive QDs after laser irradiation. The optical and structural properties of the QDs were also analysed
by means of UV-Vis, PL spectroscopy and transmission electron microscopy (TEM). The results show that
the QDs are well distributed across the film and their emission can be tuned over a wide range by varying
the temperature or irradiated laser power on the blend films. Our findings provide a route to the low cost
patterning of hybrid electroluminescent devices.

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北京欧兰科技发展有限公司
金牌会员 丨 第17年
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