摘 要

The research of Luminescent property of self-assembled - 3 -

donor-acceptor nanocrystal - 3 -

ABSTRACT - 3 -

第一章 绪论 - 4 -

1.1 有机电致光发光技术的发展和现状简述 - 4 -

1.1.1 有机电致光的研究现状 - 6 -

1.2 激基复合物的工作原理 - 6 -

第二章 溶液结晶条件的探究 - 10 -

2.1 引言 - 10 -

2.2 实验部分 - 10 -

2.2.1 实验材料 - 10 -

2.2.2 器件制备 - 11 -

2.3 不同温度时的mMTDATA-Bphen溶液结晶情况 - 13 -

2.4 最佳结晶温度时的光谱图像 - 15 -

2.5 本章结论 - 17 -

第三章 mMTDATA-Bphen结晶条件的探究与光谱测量 - 18 -

3.1 引言 - 18 -

3.2 实验仪器 - 20 -

3.3 XRD的基本原理 - 20 -

3.4 荧光吸收的基本原理 - 21 -

3.5 mMTDATA-Bphen结晶样本的光谱图 - 21 -

3.5.1 mMTDATA-Bphen结晶样本的XRD图样 - 23 -

3.6 mMTDATA-Bphen的荧光吸收 - 24 -

第四章 结论 - 26 -

第五章 致谢 - 27 -

参考文献 - 28 -

摘 要

有机发光二极管(Organic Light Emitting Diode)是一种新型电致光发光器件，其在有机化合物薄膜的两侧施加电压，通过注入电子和空穴在发光层中发光。OLED技术作为近几年来兴起的显示与照明技术，有机发光二极管有许多无可媲美的有点：轻薄，柔韧等特点让其可以适应多种不同的工作条件。同时低功耗与超广色域等优点使其获得了市面上众多显示与照明厂商的关注，也是目前光电发光研究的热点。在本篇论文中，我们探究了几种给受体溶液的结晶情况，发光光谱以及晶体结构。

首先，我们选用了一种给受体溶液[mMTDATA-Bphen]作为主要的研究对象, 研究了给受体溶液的结晶情况。在熟练基础的实验操作后，我探究并记录了该溶液在不同的温度，湿度的情况下的结晶量，晶粒大小。为后续实验确定了适宜且高效的结晶条件。为此，我们采用从30℃到120℃的梯度温度，以10℃为递进量，记录下了各个样本在放大31～32倍的光学显微镜下的结晶图像。在30℃时溶液呈大块结晶与细碎结晶共存的现象；在60℃左右溶液呈现大小均匀，体积适中的晶粒；当温度接近120℃时，溶液呈现稳定的玻璃态，不产生任何结晶。测量了在最合适结晶的温度下的样本的相对光谱强度曲线图。

其次，利用实验前期研究出来的合适结晶条件进行实验。并且记录了样本在激光的激发下所发光的强度与颜色，并使用光谱仪记录了光谱。溶液不光对结晶的条件有更挑剔的要求，结晶现象也明显不同于其他溶液：在配置好溶液一定时间后对溶液进行滴定，溶液在60℃呈现明显的针状结晶粒，并且同样在120℃左右呈现稳定的玻璃态。不同情况的结晶样本也呈现不同的发光情况。稳定的玻璃态几乎没有任何结晶，但是却能够发出较为明显的绿光。

最后，在mMTDATA-Bphen结晶样品中挑选了结晶形态最明显，密度最大的样本做XRD测量。对实验中所采用的ITO玻璃片也进行了同样条件的XRD测量，并以此数据来排除样本XRD中不属于结晶的峰。以此数据可以计算出样本的晶格常数。

关键词：激基复合物；结晶；发光现象

The research of Luminescent property of self-assembled

donor-acceptor nanocrystal

ABSTRACT

Organic Light Emitting Diode is an electroluminescent device that has emerged in recent years. It exerts voltage at the sides of organic complex film and injects electrons and holes to make itself luminescent. Organic light emitting diode has various unparalleled advantages as a novel displaying and illuminating technology：lightweight, thin, flexible and so on, making it perfect for a variety of different working conditions. Meanwhile, the advantages of low power consumption and ultra-wide color gamut have attracted the attention of many display and lighting manufacturers in the market while also being a hot spot for many researchers. In this dissertation, we have explored the crystallization, the luminescence spectrum and the crystal structure of several donor-acceptor solutions.

Firstly, we studied the crystallization of mMTDATA-Bphen solution. After practiced some basic operation I was able to explore and record the crystallization and its size of the solution under different temperatures and humidity. This step is aimed to provide some basic information for the following experiments such as the most suitable and effective crystallizing condition. In order to do so, I used a gradient temperature from 30 ℃ to 120 ℃, with the scale of 10 ℃, and recorded a crystal image of each sample under an optical microscope that magnified 31 to 32 times. In general, the solution crystallization has coexisted crystal chunks and finely divided crystals under 30 ℃, uniform size and moderate volume crystals under 60. When temperature approaching 120 ℃, the solution exhibits pure “glass state” without any signs of crystals. Then, under the most suitable condition, the spectral intensity of the sample is measured and being processed as relative intensity.

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