Low-temperature transport properties of photogenerated charges in organic materials.
Low-temperature transport properties of photogenerated charges in organic materials.
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有机材料中光生电荷的低温传输特性。
DOI：
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发表时间：
2014
影响因子：
8.6
通讯作者：
Richard H. Friend
中科院分区：
文献类型：
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作者：
A. Chepelianskii;Jianpu Wang;Richard H. Friend
我们报告了一种新的实验方法来测量本地化长度的光生载流子在有机施主-受主光伏共混物通过比较它们的介电和电子自旋共振极化率，这是同时测量通过监测超导谐振器的谐振频率。我们表明，在低温下激子解离成长寿命的状态，但这些被限制在约4 nm的分离。我们确定的德拜和重组时间，显示出共存的快速电响应对应于离域运动，与玻璃状重组动力学。
We report a new experimental method to measure the localization length of photogenerated carriers in an organic donor-acceptor photovoltaic blend by comparing their dielectric and electron spin-resonance susceptibilities, which are simultaneously measured by monitoring the resonance frequency of a superconducting resonator. We show that at cryogenic temperatures excitons are dissociated into long lived states, but that these are confined within a separation of around 4 nm. We determine the Debye and recombination times, showing the coexistence of a fast electrical response corresponding to delocalized motion, with glasslike recombination kinetics.