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Spiropyran‐Functionalized Polymer–Carbon Nanotube Hybrids for Dynamic Optical Memory Devices and UV Sensors
Advanced Electronic Materials ( IF 5.3 ) Pub Date : 2020-09-16 , DOI: 10.1002/aelm.202000717 Merve Balcı Leinen 1 , Patrick Klein 2 , Finn L. Sebastian 1 , Nicolas F. Zorn 1 , Sylwia Adamczyk 2 , Sybille Allard 2 , Ullrich Scherf 2 , Jana Zaumseil 1
Advanced Electronic Materials ( IF 5.3 ) Pub Date : 2020-09-16 , DOI: 10.1002/aelm.202000717 Merve Balcı Leinen 1 , Patrick Klein 2 , Finn L. Sebastian 1 , Nicolas F. Zorn 1 , Sylwia Adamczyk 2 , Sybille Allard 2 , Ullrich Scherf 2 , Jana Zaumseil 1
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Nanohybrids of purified semiconducting single‐walled carbon nanotubes and conjugated polymers with attached spiropyran moieties are created as photoresponsive materials for optical memory devices and ultraviolet (UV) light sensors. The hybrids respond to UV light exposure in air with photoisomerization of the spiropyran groups to merocyanine, resulting in significant and persistent p‐doping of the nanotubes, as confirmed by photoluminescence quenching and trion emission. The increased carrier concentration after illumination and the inherently high mobility of carbon nanotubes enable an up to two orders of magnitude increased conductivity of the nanotube/polymer hybrid networks in simple two‐terminal devices operated at very low bias. The photodoping decays very slowly in the dark and increases further with every illumination dose. However, it can be completely reversed by heating for a few seconds. Thin film devices based on these photoresponsive polymer/nanotube hybrids show great potential as simple and resettable UV dosimeters and optical memory elements.
中文翻译：
适用于动态光学存储设备和紫外线传感器的Spiropyran功能化聚合物碳纳米管杂化物
纯化的半导体单壁碳纳米管的纳米杂化物和带有螺吡喃部分的共轭聚合物被创建为光学存储设备和紫外线（UV）光传感器的光敏材料。杂合体通过将吡喃吡喃基团进行光异构化为花菁来响应空气中的紫外线照射，这导致了纳米管的大量且持久的p掺杂，这可以通过光致发光猝灭和三重子发射得到证实。光照后增加的载流子浓度和碳纳米管固有的高迁移率，使得在非常低的偏压下运行的简单两端子设备中，纳米管/聚合物杂化网络的电导率提高了两个数量级。在黑暗中，光掺杂衰减非常缓慢，并且在每次照明剂量下都会进一步增加。然而，加热几秒钟可以完全逆转。基于这些光敏聚合物/纳米管杂化物的薄膜器件具有巨大的潜力，可作为简单且可重置的紫外线剂量计和光学存储元件。
更新日期：2020-11-19
中文翻译：
适用于动态光学存储设备和紫外线传感器的Spiropyran功能化聚合物碳纳米管杂化物
纯化的半导体单壁碳纳米管的纳米杂化物和带有螺吡喃部分的共轭聚合物被创建为光学存储设备和紫外线（UV）光传感器的光敏材料。杂合体通过将吡喃吡喃基团进行光异构化为花菁来响应空气中的紫外线照射，这导致了纳米管的大量且持久的p掺杂，这可以通过光致发光猝灭和三重子发射得到证实。光照后增加的载流子浓度和碳纳米管固有的高迁移率，使得在非常低的偏压下运行的简单两端子设备中，纳米管/聚合物杂化网络的电导率提高了两个数量级。在黑暗中，光掺杂衰减非常缓慢，并且在每次照明剂量下都会进一步增加。然而，加热几秒钟可以完全逆转。基于这些光敏聚合物/纳米管杂化物的薄膜器件具有巨大的潜力，可作为简单且可重置的紫外线剂量计和光学存储元件。
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