Development of a Simple and Scalable Method for Organic Semiconductor Single Crystal Growth and Formation of Multi-Single Crystal Thin Films for Applications in Field-Effect Transistor-Based Devices.

采用一种新的单晶生长方法--间接升华法，成功地生长了1，3，6，8-四(甲硫基)芘(MT-Py)、MS-Py、Rubrene、DNTT和P5的晶体。对于MT-和MS-Py，获得了高覆盖率的均匀晶体，并使用研磨机将其转移到基片上，以生成用于器件应用的高覆盖率的多SC(MSC)薄膜。基于MT-Py的MSC膜基场效应晶体管(OFET)表现出良好的开关特性和高的载流子迁移率(&gt；20cm2 V-1 S-1)，与SC器件(30cm2 V-1 S-1)相当。此外，还进行了新型高迁移率有机半导体材料的开发，重点是设计类似于MT-Py的砖状晶体结构的分子。开发了一种模拟算法来准确预测已知的砖相关晶体结构(MT-和MS-Py)，并将其应用于1，3，8，10-四(甲硫基)二茂铁(MT-Py)的设计，合成并进行了评估。用MT-P制备的SC-OFET显示出很高的迁移率(30 cm~2 V~(-1)、S~(-1))。MT-P和其他材料的间接升华方法的进一步优化，以及基于OFET的器件(如伪CMOS型反相器)的制造正在进行中。此外，正在进行新材料的筛选和开发。

A novel method for single-crystal (SC) growth, called "indirect sublimation," was successfully used to grow crystals of 1,3,6,8-tetrakis(methylthio)pyrene (MT-pyrene), MS-pyrene, rubrene, DNTT, and pentacene. High-coverage uniform crystals were obtained for MT- and MS-pyrene, which were transferred to a substrate using a rubbing machine to create a high-coverage multi-SC (MSC) film for device applications. MSC film-based organic field-effect transistors (OFETs) using MT-pyrene showed good on/off characteristics and high carrier mobilities (>20 cm2 V-1 s-1), comparable to SC devices (30 cm2 V-1 s-1).The development of novel high-mobility organic semiconductor materials was also performed, with a focus on designing molecules with brickwork crystal structures similar to MT-pyrene. A simulation algorithm was developed to accurately predict known brickwork-related crystal structures (MT- and MS-pyrene), and it was applied to the design of 1,3,8,10-tetrakis(methylthio)peropyrene (MT-peropyrene), which was synthesized and evaluated. SC-OFETs made with MT-peropyrene showed very high mobilities (30 cm2 V-1 s-1).Further optimization of the indirect sublimation method for MT-peropyrene and other materials, as well as fabrication of OFET-based devices such as pseudo-CMOS inverters, is ongoing. Additionally, novel material screening and development are being performed.