Module Details

The information contained in this module specification was correct at the time of publication but may be subject to change, either during the session because of unforeseen circumstances, or following review of the module at the end of the session. Queries about the module should be directed to the member of staff with responsibility for the module.
Title Organic and Molecular Electronics
Code CHEM413
Coordinator Professor SJ Higgins
Chemistry
Shiggins@liverpool.ac.uk
Year CATS Level Semester CATS Value
Session 2021-22 Level 7 FHEQ First Semester 7.5

Pre-requisites before taking this module (or general academic requirements):

 

Aims

The aims of the module are:
1. To show students how semiconducting organic molecules and materials can be designed and synthesised for use in a wide range of electronic devices, such as organic light-emitting diodes, thin film transistors, photovoltaic devices and sensors.
2. To introduce the students to current topics of interest in the field of molecular electronics, the science of incorporating single molecules into electrical circuits.


Learning Outcomes

(LO1) By the end of the module, students should be able to show:
* familiarity with important structure-property relationships in pi-conjugated materials, and how these relate to their uses as organic semiconductors in different electronic devices.
* awareness of synthetic routes to the materials, and how these can limit or control their properties.
* familiarity with important parameters used to assess the performance of various organic electronic devices, such as OLEDs, OTFTs and OPVDs.
* awareness of current and possible future industrial applications of this new technology.
* awareness of concepts underlying experiments to determine the electrical properties of single molecules, and of the significance of these measurements.
* the ability to read and understand review papers from the literature in these areas.


Teaching and Learning Strategies

The course will be divided into 16 50-minute conventional lectures (however, these will mostly be subdivided into two or three shorter presentations), supported by two continuously assessed workshops, one covering the first (organic electronics) part of the course, the other covering the molecular electronics part of the course. There will also be a revision session scheduled.


Syllabus

 

Introduction and background

• Introduction to the course. References and where to find them. Structure of the course - use of handouts.
Organic semiconducting molecules and materials: 1. Polythiophene, a transistor material
• Discovery and significance of ''conducting polymers'': polyacetylene, and the 2000 Nobel prize in Chemistry.
• Polythiophenes and polypyrroles - electrodeposition and oxidation as modes of synthesis.
• More practical materials: how to make soluble polythiophenes.
• Polythiophenes for organic thin film transistors: synthesis, structural control, ordering in materials, testing and improving organic transistors. Problems: purity and oxygen sensitivity. Attempts to address these.
• Control of bandgap (and hence, colour) in conjugated polymers, exemplified using polythiophene derivatives: PEDOTs and polybenzo[c]thiophenes; donor-acceptor polymers . Electrochromism.

2. Polyfluorenes and polyphenylenevinylenes: Light-emitting polymer diodes

• History of polymer light-emitting diodes
• PPV and ''precursor'' routes to conjugated polymers.
• Suzuki coupling as a route to polyfluorenes. Colour (bandgap) control in these materials.
• Current state of the art. Display devices using OLEDs. Commercial products using this technology.

3. Organic photovoltaics

• How an organic photovoltaic device works, and why it''s different from a silicon device.
• Polythiophenes and C60.
• Tuning bandgap to maximise light adsorption in organic photovoltaic devices.
• Possible consequences for cheap, reliable OPVDs.

Molecular electronics

• History: the Aviram-Ratner device.
• Supramolecular chemistry and molecular electronics.
• &#x 27;Real' molecular electronics: wiring molecules into a circuit, one molecule at a time.
• How does charge get through a molecule?
• Characteristics of devices, and issues with molecular electronics


Recommended Texts

Reading lists are managed at readinglists.liverpool.ac.uk. Click here to access the reading lists for this module.

Teaching Schedule

  Lectures Seminars Tutorials Lab Practicals Fieldwork Placement Other TOTAL
Study Hours 16

  2

      18
Timetable (if known)              
Private Study 57
TOTAL HOURS 75

Assessment

EXAM Duration Timing
(Semester)
% of
final
mark
Resit/resubmission
opportunity
Penalty for late
submission
Notes
remote examination 2 hours on task  120 minutes    80       
CONTINUOUS Duration Timing
(Semester)
% of
final
mark
Resit/resubmission
opportunity
Penalty for late
submission
Notes
Categorised as coursework, but more accurately described as a workshop with problem sets. Part of a continuous assessment worth 20%  240 minutes    20