Microstructure, morphology and device physics of gravure printed and solution processed organic field-effect transistors

This thesis explores the relationship between microstructure, morphology and device physics in gravure printed and solution processed organic field-effect transistors (OFETs). Chapter 1 introduces the key concepts encountered in this work: the properties of organic semiconductors and OFETs; the use of printing techniques in organic electronics; and the relationship between microstructure and OFET performance in poly(3-hexylthiophene) (P3HT). Chapter 2 details the materials and experimental techniques used in this thesis. In Chapter 3, gravure printing is demonstrated for high throughput fabrication of OFETs. Printed devices are achieved with typical saturated mobility of 0.03cm2/Vs and on/off ratio in the range 103:9-4:6, which exceeds that achieved with spin coated devices with the same material system and geometry. Chapter 4 presents a systematic comparison of the microstructure and OFET characteristics of gravure printed and spin coated P3HT thin films. First light scattering is used to understand the conformation of P3HT chains in various solvents, then grazing incidence wide angle X-ray scattering (GIWAXS), absorption characteristics and atom force microscopy (AFM) are used to characterise the microstructure of the P3HT lms. In turn, this is compared to OFET performance. In Chapter 5 two solvent based techniques are investigated as alternatives to thermal annealing as methods to enhance microstructure. A blend of a high and low boiling point solvent is first examined as the casting solvent for P3HT and is found to moderately improve P3HT field-effect mobility. Secondly, solvent vapour treatment (SVT) - exposing a P3HT film to a solvent vapour after spin coating - is studied by in-situ GIWAXS. The time resolved measurement of interchain and interlamella distances allowed the dynamics of SVT to be investigated. SVT was found to decrease P3HT crystallinity, although AFM showed it lead to smoother films. In Chapter 6 two emerging materials are investigated for use in OFETs. Preliminary work on fabricating OFETs with single crystal copper phthalocyanine is presented. Finally, work towards a metal-free OFET is described in which the source and drain electrodes are formed of high conductivity PEDOT deposited by vapour phase polymerisation

Review of Second Friends: C. S. Lewis and Ronald Knox in Conversation

Review of: Milton T. Walsh, Second Friends: C. S. Lewis and Ronald Knox in Conversation (San Francisco, 2008). 360 pages. $16.95. ISBN: 9781586172404

It's a virtual life: exploring social networks

As information librarians we are focused on communication and the need to keep in touch with our user communities. Across a wide age range in the UK, nearly half the population (24 million adults) use one or more social networking sites. Information producers, librarians and users have had to come to terms, in their different ways, with the challenges posed by the exponential growth in social networking sites and the opportunities that Web 2.0 provides. The East of England ISG Spring Meeting on “lt's a Virtual Life: exploring social networks” discussed the issues and examined experiences of using Web 2.0. lt was held on 17 April 2008 at BT's Adastral Park in lpswich. Several of the papers are available on the web at www.cilipeoe.org.uk/archives/isg_l7thapril.shtm

The art of memory and the art of salvation : a study with reference to the works of Lancelot Andrewes, John Donne and T.S.Elliot.

SIGLEAvailable from British Library Document Supply Centre- DSC:DX181331 / BLDSC - British Library Document Supply CentreGBUnited Kingdo

School Personnel and Employment Law: A Legal Analysis for Today’s Elementary and Secondary Catholic School

Diocesan central office staff, principals, pastors, and other chief executive officers face personnel and hiring decisions regularly. Dismissal of employees and nonrenewal of contracts, racial discrimination, age discrimination, disability discrimination, sex or gender discrimination, sexual harassment, and the right of workers to organize. The author concludes with an appeal to Catholic leaders to stay well informed of ongoing developments in employment law and calls for the implementation of arbitration to avoid costly litigation

Rural Women Health Information Sources and Channels in Manipur, North East India.

In order to identify the existing health information sources and channels of rural women, 213 married women of child bearing age from four villages of Kangpokpi District in Manipur, India were randomly selected. A questionnaire method was adopted for the data collection and Descriptive Statistics was used for analyzing the data collected from the women. The study identified a number of health information sources such as Family members, Friends, among others and Information channels like Word of Mouth ASHA, Pamphlet in Mother tongue, Mobile phone Short Message System (SMS) for communicating their health information needs

Stratemeyer v. Lincoln County: Mental Injuries and Workers\u27 Compensation Policy

Stratemeyer v. Lincoln County: Mental injuries and workers\u27 compensation polic