Improving the design and performance of polymer thin-film transistors for circuit applications.

改进电路应用聚合物薄膜晶体管的设计和性能。

• 批准号: 1407932
• 负责人: Ananth Dodabalapur
• 金额: $ 35.04万
• 依托单位: University of Texas at Austin
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2014
• 资助国家: 美国
• 起止时间: 2014-07-15 至 2017-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1407932&HistoricalAwards=false
• 关键词: Improving; design; performance; polymer; thin

Abstract Title: Improving the design and performance of polymer thin-film transistors for circuit applications.Nontechnical Description: Polymer thin-film transistors are circuit components in which the semiconductor material is not silicon or amorphous silicon, but a polymer. Such components are being actively pursued for a variety of applications including flexible displays, biocompatible electronics, and large-area electronics. The attractiveness of polymer transistors for these applications, many of which are flexible, stem from simple fabrication methods and low costs. It is possible to deposit a polymer semiconductor by a simple process such as inkjet printing, in which the ink contains the polymer. The printer defines the area where the semiconductor is deposited. It is also necessary to deposit insulating layers and conductors to complete the fabrication process. The aim of the proposed research is to improve the design of polymer transistors so that they perform better: possess higher speed and better switching characteristics. To do this, we will study how charges move in such polymers so that we can devise ways to increase their speeds so that the transistor will switch faster. We will develop new and improved measurements so we can get a deeper understanding of transistor operation. These improved polymer transistors will be used to build logic circuits such as flip-flops and shift registers to see how they perform in a circuit. This is important since most practical applications involve the construction of circuits involving many components. The results of this research will impact the fields of flexible and printable electronics.Technical Description: This project will analyze new field-effect transistor device structures that will employ polymer semiconductors with the goal of realizing vastly improved device and circuit performance. In addition to increasing the mobility and speed, attention will be paid to device designs aimed at lowering the operating voltage. This project will address in detail the measurement of Hall mobility in donor-acceptor polymers and use the Hall Effect along with time-resolved current-voltage measurements to get a detailed characterization and understanding of charge transport in these polymeric semiconductors that show much promise. We have developed methods to characterize devices at timescales ranging from 100 ns to many seconds which will be employed along with Hall Effect measurements. Some of the highest mobilities that have been hitherto achieved in polymer semiconductors are in the 3-15 cm2/V-s range, with higher mobilities possible. These relatively large mobilities will result in enhanced carrier delocalization, which will be characterized in detail, leading to an improved theoretical understanding of transport and device physics. We will also develop advanced device structures that will involve new gate insulator combinations and source/drain materials, the use of optimized process conditions to improve molecular ordering and therefore mobilities and operating lifetime. We will demonstrate low-voltage, high speed clocked sequential circuits such as D-Flip Flops and shift registers. These new and improved devices and the circuits that will be constructed with them will help the field of printed electronics.

摘要标题：改善电路应用的聚合物薄膜晶体管的设计和性能。非技术描述：聚合物薄膜晶体管是电路组件，其中半导体材料不是硅或无定形的硅，而是聚合物。 这些组件正在积极地用于各种应用，包括柔性显示器，生物相容性电子产品和大面积电子产品。 这些应用的聚合物晶体管的吸引力，其中许多是灵活的，源于简单的制造方法和低成本。 可以通过简单的过程（例如喷墨打印）沉积聚合物半导体，其中墨水包含聚合物。 打印机定义了沉积半导体的区域。 还必须沉积绝缘层和导体以完成制造过程。 拟议的研究的目的是改善聚合物晶体管的设计，使它们的性能更好：具有更高的速度和更好的开关特性。为此，我们将研究这种聚合物中的电荷如何移动，以便我们可以设计方法来提高其速度，从而使晶体管切换更快。我们将开发新的和改进的测量结果，以便我们可以更深入地了解晶体管操作。 这些改进的聚合物晶体管将用于构建逻辑电路，例如触发器和移位寄存器，以查看它们在电路中的性能。 这很重要，因为大多数实际应用涉及涉及许多组件的电路的构建。 这项研究的结果将影响灵活和可打印的电子产品的领域。技术描述：该项目将分析新的现场效应晶体管设备结构，该结构将采用聚合物半导体，以实现大大改善的设备和电路性能。 除了提高移动性和速度外，还将注意旨在降低操作电压的设备设计。 该项目将详细介绍供体 - 受体聚合物中Hall移动性的测量，并使用HALL效应以及时间分辨的电流 - 电压测量值，以获取对这些聚合物半导体中电荷传输的详细表征和理解，以显示出很大的希望。 我们已经开发了在从100 ns到许多秒的时间尺度上表征设备的方法，这些设备将与Hall效应测量一起使用。 迄今为止在聚合物半导体中实现的一些最高迁移率在3-15 cm2/v-s范围内，可以使用更高的迁移率。 这些相对较大的迁移率将导致增强的载体离域化，这将详细表征，从而提高对运输和装置物理的理论理解。 我们还将开发高级设备结构，这些结构将涉及新的栅极绝缘体组合和源/排水材料，使用优化的过程条件改善分子订购，从而使迁移率和运营寿命。我们将演示低压，高速时钟的顺序电路，例如D-Flip Flops和Shift寄存器。 这些新的和改进的设备以及将使用它们构建的电路将有助于印刷电子产品领域。