成果報告書詳細
管理番号20110000001748
タイトル*平成22年度中間年報 「省エネルギー革新技術開発事業/先導研究/ヘテロ接合構造を有する環境対応型プリンタブル有機EL素子に関する研究開発」
公開日2012/2/17
報告書年度2010 - 2010
委託先名大電株式会社
プロジェクト番号
部署名省エネルギー部
和文要約1. 研究開発の内容及び成果等
(1)アルコール可溶性発光材料の開発
現在、高効率発光材料は、各研究機関で盛んに研究開発が行われている。我々は、既知の高効率高耐久性の発光材料に置換基を導入しアルコール可溶化を実現することにより、効率よく高効率高耐久性のアルコール可溶性発光材料の開発することを目指している。
本年度は、昨年に引き続き赤色、緑色、青色発光色素に大電が有するアルコール可溶化技術を応用しアルコール可溶化を実施した。今回、合成を行なった色素の殆どにアルコール可溶性を付与でき大電が有する電子輸送材料のアルコール可溶化技術が色素にも応用可能であることを確認した。
溶液量子収率40%以上の赤色色素5種(中間目標2種)、緑色色素6種(中間目標2種)、青色色素4種(中間目標2種)を合成でき中間目標を達成できた。
英文要約Research and Development Program for Innovative Energy Efficiency Technology. (Preparatory Research Phase.) Research and Development Concerning an Environment Matching type Printable Organic EL device which has a Heterojunction Structure.(FY2009-FY2011) FY2010 Annual Report
(1)Development of the alcoholic solubility luminescent material: This year again, we conducted an alcohol solubilization to red, green and blue emitting dyes by applying our alcohol solubilization technology. This time, we have confirmed that most synthesized dyes can provide alcohol solubility and our alcohol solubilization technology for electronic transport materials can also apply for dyes. We were able to synthesize 5 types of red dyes, 6 types of green dyes and 4types of blue dyes those have more than 40% solution quantum yield, and we have achieved the intermediate objective successfully. (2)Development of emissive layer material without the need for an electron-injection layer: A conventional organic light emitting diode (OLED) device needs to electron injection layer (EIL) and electron transport layer (ETL) between cathode and emitting layer, in this project aim to develop a new high efficiency, no EIL and ETL OLED device to take the advantage of our materials (DYETM). In this year, we have created the printable OLED device combining alcohol soluble emitting materials, conductive dopants and DYETMs. We have confirmed direct electron injection using a model device from Al electrode to ternary emitting layer (Host + emitting material + conductive improver) that is most important elemental technology in this research. And in our investigation, lifetime of the new development device was confirmed to immediate decrease by half. Thus, we researched degrading factors of the device, and found out that factors were degrading hole transport materials. We have achieved nearly target value of 7200 hours lifetime by these researches. (3)Search for alcohol tolerance hole transportation material: The topic of this research is emitting materials. However, device currently in development revealed that hole transport materials limit to the lifetime widely. When we innovate new hole transport materials, the lifetime has improved to almost 7200hours. Now, we are searching other hole transport materials for keep the lifetime performance.
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