Theoretical and experimental studies of bending/stretching of inorganic electronic materials printed on plastic substrates and their practical applications

Flexible electronics based on inorganic devices has attracted increasing interest in versatile applications, from commercial systems, such as flat panel displays, to new possible systems, such as paperlike display, sensors, and medical devices, due to its many potential advantages including established electrical performance in comparison with organic based devices. However, the behavior of inorganic materials on plastic substrate by bending has been not studied well and the degree of bendability has simply defined by the bend radius at which the strain reaches some substantial fraction of a fracture strain (e.g., ~1 %) in a typical inorganic film. This thesis has been focused on the fundamental scientific studies necessary to establish the accurate bending induced mechanics of these systems and demonstration of various new inorganic based applications with high bendable and stretchable properties. Firstly, comprehensive experimental and theoretical studies of bending in flexible inorganic electronics on plastic substrates enable to understand the limits of flexibility and, moreover, improve this property of inorganic electronics on plastic substrate. Secondly, based on these studies, the focus of this thesis has been on the developments of highly bendable arrays of single crystalline silicon solar cells on plastic and highly bendable, stretchable, and deformable III-V compound semiconductor inorganic light emitting diodes (ILEDs) display as practical applications.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Materials Science & Engr

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2010

Author dc:creator

• Park, Sang Il

Contributors dc:contributor

• Rogers, John A.
• Braun, Paul V.
• Shim, Moonsub
• Kim, Kyekyoon

• Flexible electronics
• Stretchable electronics
• Foldable electronics
• Inorganics on plastic substrate
• Inorganic light-emitting diodes (ILEDs)
• Solar cells
• Bending mechanics

Statement dc:rights

• Copyright 2010 Sang Il Park

Language dc:language

en

Handle dc:identifier

http://hdl.handle.net/2142/15561

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/15561