用于溶液处理的互补有机场效应晶体管中的稳健有源层的潜在颜料策略
Latent Pigments Strategy for Robust Active Layers in Solution-Processed, Complementary Organic Field-Effect Transistors
摘要：
溶液加工有机半导体通过具有成本效益的、基于溶液的大规模制造技术实现了大面积和柔性电子产品的制造。然而，对于许多应用，不溶性活性层可以在对加工溶剂的鲁棒性方面提供技术优势。这在场效应晶体管（FET）中特别相关，其中，在半导体层的顶部上处理来自溶液的阻挡层或屏障通常强制使用正交溶剂，以便不干扰纳米厚的累积沟道。为此，使用潜在的颜料，高度可溶的分子，可以产生不溶性膜后，沉积热裂解的增溶基团，是一个非常有前途的策略。在这方面的贡献，我们证明了使用叔丁氧羰基（叔-Boc）官能化的diketopyrrolopyrrole和二萘嵌苯-二酰亚胺小分子的良好的空穴和电子传输膜。t-Boc热裂解产生的膜的致密化，随着强的脱保护分子的结构重排，强烈地提高电荷迁移率在p型和n型FET。我们还强调了这些高度不溶性半导体层对典型和侵蚀性加工溶剂的鲁棒性。这些结果可以大大提高多层有机电子器件制造的自由度，为苛刻的加工步骤提供增强的稳定性。
英文摘要：
Solution-processed organic semiconductors enable the fabrication of large-area and flexible electronics by means of cost-effective, solution-based mass manufacturing techniques. However, for many applications an insoluble active layer can offer technological advantages in terms of robustness to processing solvents. This is particularly relevant in field-effect transistors (FET), where processing of dielectrics or barriers from solution on top of the semiconductor layer typically imposes the use of orthogonal solvents in order not to interfere with the nanometer thick accumulation channel. To this end, the use of latent pigments, highly soluble molecules which can produce insoluble films after a post-deposition thermal cleavage of solubilizing groups, is a very promising strategy. In this contribution, we demonstrate the use of tert-Butyloxycarbonyl (t-Boc) functionalized diketopyrrolopyrrole and perylene-diimide small molecules for good hole and electron transporting films. t-Boc thermal cleavage produces a densification of the films, along with a strong structural rearrangement of the deprotected molecules, strongly improving charge mobility in both p- and n-type FET. We also highlight the robustness of these highly insoluble semiconducting layers to typical and aggressive processing solvents. These results can greatly enhance the degree of freedom in the manufacturing of multi-layered organic electronic devices, offering enhanced stability to harsh processing steps.
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