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최란희,한용운,문두경 한국공업화학회 2018 한국공업화학회 연구논문 초록집 Vol.2018 No.0
Metal oxide has been introduced as electron transporting layer(ETL) in inverted organic photovoltaics(OPVs) due to its transparency, electrical conductivity and ability to solution process. But, when performing layers with these metal oxide, oxygen vacancy and surface defect occur and act as trap site. These defects also form hydrophilic surface, which make interfacial contact with active layer became poor. Addition of processes such as ion doping and solvent treatment to the ETL can improve performance of OPV because it is a way to remove defect. Conjugated polyelectrolytes(CPEs), material consist of π-conjugated backbone with ionic side chain, are widely used in OPVs. Also, chelating agents can form stable complex with metal. Therefore, in this study, we fabricated solar cells with improved interfacial contact and better performance using chelating agents that can reduce defect in existing metal oxide and CPEs that are soluble in polar solvent and can make hydrophobic surface.
최란희,한용운,문두경 한국공업화학회 2017 한국공업화학회 연구논문 초록집 Vol.2017 No.1
Inverted organic photovoltaics (OPVs) have been reported the power conversion efficiency (PCE) over 12% due to their high internal built-in potential and high stability. Metal oxides are usually introduced as electron transporting layer (ETL) in inverted OPVs because they have better conductivity and higher optical transparency than other materials. However, these ETL have some defects on the film surface such as oxygen vacancies, these defects can cause performance degradation of devices. So, it is essential to remove these defects for achieving high performance devices. Chelating agent is chemical compound that react with heavy metal ions to form stable metal complexes. Therefore, vacancies in ETL can be removed by treatment with chelating agent. In this study, we fabricated OPVs introducing ETL with chelating agent for passivation surface vacancies. As a results, device performances were improved by eliminating the defects existing in the ETL.
한용운,최란희,이의진,문두경 한국공업화학회 2016 한국공업화학회 연구논문 초록집 Vol.2016 No.1
Organic solar cells (OSCs) have been studied actively because of its advantages such as low-cost process, light weight, and easy fabrication. Especially, inverted-OSCs using metal oxide as electron transporting layer (ETL) showed high performance and great stability compared to conventional structure solar cells. Moreover, the performance of i-OSCs can be enhanced by introducing ETL for improving carrier extraction and reducing carrier recombination. Among them, hydrophilic functionalized inorganic interlayer should make a great performance and stability of i-OSCs. In this study, hydrophilic functionalized inorganic material was introduced as an interlayer with metal oxide. I-OSCs were fabricated with and without inorganic interlayer. As a result, performances of i-OSCs device were enhanced in the device fabricated with hydrophilic functionalized inorganic interlayer by means of modifying work function and reducing energy barrier between electrode and active layer.
서원남,최란희 대한중국학회 2011 중국학 Vol.40 No.-
语言是人类生活中非常重要的交流工具,是人与人之间知识和经验的传达手段。语言随着人类的进化而产生,发展,进而产生文字符号,它突破了语言(口语)受到的时间和空间的限制,文字可以更好的记录人类的历史和文化并得以长久流传。众所周知,语言一直在变化,那么文字也理所当然的一直在变化吗?本论文的研究针对这个问题进行具体论述,特别是汉字因为具有表意性的特征,内在的含义可以进行类推,如果想要知道一个汉字的意思,可以从它的部首来进行推测,因为同一个部首的汉字有类似的意思。本论文从《说文》中的含义研究开始到《玉篇》和《现代汉语大辞典》中的含义研究,这些字的含义朝着哪个方向变化进行研究,通过以上的分析,不论语言还是文字,随着时代的变化而变化,而没有通用的汉字也逐渐消失。现代汉语中往往一个汉字有很多个意思,这些意思在以前的字典中,有的无法找到,有的可以找到。从'走'字部的所有意思来看,可以发现有两个特征。首先,一般的看法是“走”字部的汉字都有“跑”的意思,但分析的结果是不同的。正如前面第2章中有“'跑,走,移动,超越,速度,其他”等六个含义,大约30%的“走”字部汉字是“跑”的意思,其他的意思的“走”字部汉字占有的比例更多。特别是现代,有更多的不同的含义派生出来,意思更加多样化。最后,我们可以发现在《说文》,《玉篇》中的字现在有很多消失了或者意思已经包含在“现代汉语大辞典”中。以《现代》为基准,包含在《说文》中的是总共18个意思中存在8个意思。标题字85个中只有59个归于其中,剩下的26个在《现代》中并没有意思。意思分为“'跑,步行。移动”。而名词的用法:“有趣”,介词的用法:“趁~”,动词用法:“起~”,这些在《说文》中没有出现。像这样通过对现代一个部首的意思进行分析的方式,可以对以前中国人的思想和词语的发展有个了解。而越到现代,汉字的个数越少的原因是因为汉语中一个动词都包含有很多意思。但是,“走”字部的汉字中和'足'字是否有关联性这部分在这里还没有进行分析研究,以后将会对这方面问题做进行进一步的研究。