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

Park, Sang Il

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https://hdl.handle.net/2142/15561 Copy

Description

Title

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

Author(s)

Park, Sang Il

Issue Date

2010-05-14T20:50:29Z

Director of Research (if dissertation) or Advisor (if thesis)

Rogers, John A.

Doctoral Committee Chair(s)

Rogers, John A.

Committee Member(s)

• Braun, Paul V.
• Shim, Moonsub
• Kim, Kyekyoon

Department of Study

Materials Science & Engineerng

Discipline

Materials Science & Engr

Degree Granting Institution

University of Illinois at Urbana-Champaign

Degree Name

Ph.D.

Degree Level

Dissertation

Keyword(s)

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

Abstract

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.

Graduation Semester

2010-5

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

Copyright and License Information

Copyright 2010 Sang Il Park

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