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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Setup to Study the in Situ Evolution of Both Photoluminescence and Absorption during the Processing of Organic or Hybrid Semiconductors
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Setup to Study the in Situ Evolution of Both Photoluminescence and Absorption during the Processing of Organic or Hybrid Semiconductors

机译：设置以研究有机或杂交半导体加工过程中光致发光和吸收的原位演变

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摘要

In situ measurement techniques, applied during the solution processing of novel semiconductors such as organic semiconductors or hybrid perovskites, have become more and more important to understand their film formation. In that context, it is crucial to determine how the optical properties, namely photoluminescence (PL) and absorption, evolve during processing. However, until now PL and absorption have mostly been investigated independently, significantly reducing the potential insights into film formation dynamics. To tackle this issue we present the development of a detection system that allows simultaneous measurement of full absorption and PL spectra during solution processing of the investigated film. We also present a spin-coater system attachable to the detection system, where the temperature of the substrate on which the film is processed can be changed. We performed test measurements by spin coating the well-known conjugated polymer P3HT demonstrating the potential of this technique. By considering absorption and corresponding PL, we extract the PL quantum yield (PLQY) during processing, which decreases with substrate temperature. Furthermore, we identify a significant red shift of the PL just prior to the onset of the aggregation process, indicating the importance of chain planarization prior to solid film formation.
机译：在原位测量技术中，在溶液加工过程中应用，例如有机半导体或杂交钙酸盐，可以越来越重要，无法理解其成膜。在这种情况下，确定光学性质，即光致发光（PL）和吸收，在加工期间演变是至关重要的。然而，直到现在PL和吸收大多是独立调查的，显着降低了对膜形成动态的潜在见解。为了解决这个问题，我们介绍了一种检测系统的开发，该系统允许在调查的薄膜的溶液加工过程中同时测量全部吸收和PL光谱。我们还提供了一种可连接到检测系统的自旋涂布机系统，其中可以改变膜的基材的温度。我们通过旋转涂覆众所周知的共轭聚合物P3HT来进行测试测量，证明该技术的潜力。通过考虑吸收和相应的PL，我们在加工过程中提取PL量子产率（PLQY），其随衬底温度降低。此外，我们在聚集过程开始之前识别PL的显着的红色偏移，表明在实体膜形成之前链平坦化的重要性。

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