Kumar Behera Paresh, Yadav Kajal, Roy Mrinmoy, Shankar Rao D S, Kumar Pandey Upendra, Sudhakar Achalkumar Ammathnadu
Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, Assam, 781039, India.
Department of Electrical Engineering, Shiv Nadar Institution of Eminence, Gautam Buddha Nagar, Uttar Pradesh, 201314, India.
Chemistry. 2025 Mar 6;31(14):e202402557. doi: 10.1002/chem.202402557. Epub 2025 Jan 5.
This study presents a selenium-annulated perylene bisimide (PBI-Se) stabilizing room temperature columnar hexagonal phase with exceptionally low clearing temperature. The synthesis of this Se-annulated PBI (PBI-Se) was accomplished using the reductive Cadogan cyclization method, with the introduction of swallow tails to reduce the clearing temperature and improve solubility. In addition, the charge carrier mobility of the Se-bay annulated PBI is assessed by space charge limited current (SCLC) technique and juxtaposed with PBI as well as nitrogen and sulphur-bay-annulated PBIs. It is noteworthy that all these PBIs exhibited ambipolar charge carrier mobility, a characteristic that diverges from the prevailing literature where predominantly electron transport behavior was observed for PBIs. This distinguishes them as an exclusive category of solution-processable, self-assembling organic semiconductors.
本研究展示了一种硒环化苝酰亚胺（PBI-Se），它能稳定室温柱状六方相，且具有极低的清亮点温度。这种硒环化苝酰亚胺（PBI-Se）的合成是通过还原性卡多根环化方法完成的，引入燕尾结构以降低清亮点温度并提高溶解性。此外，通过空间电荷限制电流（SCLC）技术评估了硒桥连苝酰亚胺的电荷载流子迁移率，并将其与苝酰亚胺以及氮和硫桥连苝酰亚胺进行了对比。值得注意的是，所有这些苝酰亚胺都表现出双极性电荷载流子迁移率，这一特性与现有文献中主要观察到苝酰亚胺的电子传输行为不同。这使它们成为一类独特的可溶液加工、自组装有机半导体。
