Mobile ionic impurities in organic semiconductors
Mobile ionic impurities in organic semiconductors
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有机半导体中的移动离子杂质
DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
T. Klapwijk
中科院分区：
文献类型：
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作者：
D. Rep;A. Morpurgo;W. Sloof;T. Klapwijk
我们研究了玻璃衬底上有机薄膜器件的电流-电压特性随时间的稳定性。我们发现，对于聚（3-hexylthiophene）和并五苯的设备的电阻逐渐改变下的应用程序的电偏压取决于实验中使用的玻璃基板的钠含量。对于非常常见类型的玻璃（具有约6%的Na 2 O含量）和钠钙玻璃（14%Na2O）基板上的器件，电压偏置的延长应用导致体电阻和接触电阻的大幅降低（高达两个数量级），而对于无钠玻璃基板，电流-电压特性的逐渐变化小得多。 一个系统的研究补充的化学分析表明，所观察到的不稳定性是由于Na+离子从基板扩散到有机膜，并移动内的有机材料作为一个结果，所施加的电场。我们的成果将…
We study the stability in time of the current–voltage characteristics of organic thin-film devices on glass substrates. We find for poly(3-hexylthiophene) and for pentacene that the resistance of the devices gradually changes under the application of an electrical bias depending on the sodium content of the glass substrates used in the experiment. For devices on a very common type of glass (with a Na2O content of about 6%) and on sodalime glass (14% Na2O) substrates, the prolonged application of a voltage bias results in a substantial decrease (up to two orders of magnitude) of the bulk and contact resistances, whereas for sodium-free glass substrates the gradual changes in current–voltage characteristics are much smaller. A systematic study of the electrical behavior complemented by chemical analysis shows that the instabilities observed are due to Na+ ions diffusing from the substrate into the organic film, and moving inside the organic material as a result of the applied electric field. Our results sho...