The Photo-Hall Effect in High-Mobility Organic Semiconductors
The Photo-Hall Effect in High-Mobility Organic Semiconductors
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DOI：
10.1002/adfm.202006178
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发表时间：
2020-11-05
影响因子：
19
通讯作者：
Podzorov, Vitaly
中科院分区：
文献类型：
--
作者：
Bruevich, Vladimir;Hyun Ho Choi;Podzorov, Vitaly
高迁移率结晶有机半导体在先进有机电子学和光子学中具有重要的应用价值。这些材料中移动光载体的光产生和传输，虽然非常重要，但仍未得到充分的探索。光霍尔效应可以用来解决这些功能分子材料的基本电荷传输特性，而不需要制造复杂的晶体管器件或化学掺杂。在这里，我们使用一个基准分子体系Rubrene作为实验平台，在有机半导体中演示了光霍尔效应。结果表明，该技术可以直接测量载流子迁移率和光载流子密度，解耦表面和体输运现象，从而大大加深对这些高性能分子材料光导机理的理解。
High-mobility crystalline organic semiconductors are important for applications in advanced organic electronics and photonics. Photogeneration and transport of mobile photocarriers in these materials, although very important, remain underexplored. The photo-Hall effect can be used to address the fundamental charge transport properties of these functional molecular materials, without the need for fabricating complex transistor devices or chemical doping. Here, a photo-Hall effect is demonstrated in organic semiconductors, using a benchmark molecular system rubrene as an experimental platform. It is shown that this technique can be used to directly measure the charge carrier mobility and photocarrier density, decouple the surface and bulk transport phenomena, and thus significantly deepen the understanding of the mechanism of photoconductivity in these high-performance molecular materials.