Elucidation of electrical conductivity of DNA polyion-complexes and the applications for optoelectronic devices

DNA聚离子复合物的导电性及其在光电器件中的应用的阐明

• 批准号: 15350138
• 负责人: IMAI Toshiro
• 金额: $ 9.73万
• 依托单位: Chitose Institute of Science and Thchnology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2004
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15350138/
• 关键词: DNA; Conductivity; DNA-CTMA; OLED; Time of Flight; Mobility; 塩基; 有機LED; 有機EL; ポリイオンコンプレックス

DNA forms a double helix structure that contains four bases (adenine (A), cytosine (C), guanine (G), and thymine (T). It is basically an abundance of πelectrons. Because a regular sequence of the four bases in DNA can be assumed to be a conducting wire, we can create novel electronic device applications with advanced functions using DNA as an electrically active material.In this study, we evaluated fundamental conductivity of the DNA-CTMA thin film. The J-V characteristics of DNA-CTMA single and double layer devices combined with unipolar hole (TPD) and electron (POXD) transport layers clearly demonstrated electrical conductivity of DNA-CTMA. We observed that the current density of J=590mA/cm^2 with the DNA-CTMA single layer device, J=11mA/cm^2 with the DNA-CTMA double layer device combined with TPD and J=0.02mA/cm^2 with the DNA-CTMA double layer device combined with POXD at an applied voltage of 10V. These results clearly suggest that the DNA-CTMA layer basically has bipolar carrier transport characteristics.We further evaluated fundamental conductivity of the vacuum deposited thin films of the four bases. We observed that the current density of J=180mA/cm^2 with Adenine, J=0.35mA/cm^2 with Cytosine, J=10mA/cm^2 with Guanine and J=2.3mA/cm^2 with Thymine at an applied voltage of 10V. Further, we confirmed charge carrier transport characteristics of the four bases by using them in electrophosphorescence OLEDs. Theη_<ext>-J characteristics of OLEDs with four bases as HTL were investigated. Adenine, Cytosine and Guanine as HTL demonstrated maximumη_<ext>〜8.0±0.2% demonstrating that the vacuum deposited films of the four bases are useful as a HTL in OLED.Our results dearly demonstrated that DNA double helix intrinsically have semiconducting characteristics and the DNA-CTMA and the vacuum deposited base films have potential for semiconductor applications.

DNA形成一个双螺旋结构，包含四个碱基(腺嘌呤(A)、胞嘧啶(C)、鸟嘌呤(G)和胸腺嘧啶(T))。它基本上是一个丰富的π电子。由于DNA中四个碱基的规则序列可以被假设为一根导线，因此我们可以利用DNA作为电活性材料来创造具有先进功能的新型电子器件应用。结合单极空穴(TPD)和电子(POXD)传输层的DNA-CTMA单层和双层器件的J-V特性清楚地表明了DNA-CTMA的导电性。在10V电压下，DNA-CTMA单层器件的电流密度J=590 mA/cm^2，DNA-CTMA双层器件结合TPD的电流密度J=11 mA/cm^2，DNA-CTMA双层器件结合POXD的电流密度J=0.02 mA/cm^2。这些结果清楚地表明，DNA-CTMA层基本上具有双极载流子输运特性。我们进一步评估了四种碱基的真空沉积薄膜的基本电导。在10V电压下，腺嘌呤的电流密度J=180 mA/cm~2，胞嘧啶的电流密度J=0.35 mA/cm~2，鸟嘌呤的电流密度J=10 mA/cm~2，胸腺嘧啶的电流密度J=2.3 mA/cm~2。进一步，我们将这四种碱基用于电致磷光有机发光器件，证实了它们的载流子输运特性。研究了四种碱基作为高温超导体的有机电致发光器件的η_&lt；EXT&gt；-J特性。腺嘌呤、胞嘧啶和鸟嘌呤作为有机发光材料具有最大的η_t；ext&gt；~8.0±0.2%，说明真空沉积的四种碱基作为有机发光材料具有很好的应用前景。

项目成果

Electroluminescence as a probe for elucidating electrical conductivity in a DNA-CTMA layer

电致发光作为探针阐明 DNA-CTMA 层的导电性

• 发表时间: 2004
• 期刊: Appl.Phys.Lett. 85
• 作者: H.Kurosu;M.Kawasaki;M.Hirose;M.Yamada;S.Kang;J.Thisayukta;M Sone;H.Takezoe;J.Watanabe;Kunio Hirata
• 通讯作者: Kunio Hirata

H.Inomata: "High-efficiency organic electrophosphorescent diodes using 1, 3, 5-triazine electron transport materials"Chem.Mat.. 16. 1285-1291 (2004)

H.Inomata：“使用1,3,5-三嗪电子传输材料的高效有机电致磷光二极管”Chem.Mat.. 16. 1285-1291 (2004)