Mechanics of thin-film transistors and solar cells on flexible substrates

Helena Gleskova, I. Chun Cheng, Sigurd Wagner, James C. Sturm, Zhigang Suo

Research output: Contribution to journalArticle

104 Citations (Scopus)

Abstract

When devices are fabricated on thin foil substrates, any mismatch strain in the device structure makes the work piece curve. Any change of the radius of curvature produces a change in the size of the work piece, and thereby misalignment between individual device layers. To achieve tight tolerances, changes of curvature must be minimized throughout the fabrication process.

Amorphous silicon thin-film transistors and solar cells respond differently to externally applied tensile strain. The elastic deformation of the transistor is correlated with small increase in the electron mobility. When the tensile strain reaches ~ 0.34%, crack formation starts and causes an abrupt change in the transistor performance. The performance of solar cells, on the other hand, does not change for tensile strain up to ~ 0.7%. At larger strain the short-circuit current, open-circuit voltage, fill factor, and the efficiency gradually decrease.
LanguageEnglish
Pages687-693
Number of pages7
JournalSolar Energy
Volume80
Issue number6
DOIs
Publication statusPublished - 1 Jun 2006

Fingerprint

Tensile strain
Thin film transistors
Solar cells
Mechanics
Transistors
Substrates
Electron mobility
Elastic deformation
Open circuit voltage
Amorphous silicon
Crack initiation
Short circuit currents
Metal foil
Fabrication

Keywords

  • amorphous silicon
  • solar cell
  • thin-film transistor
  • flexible electronics

Cite this

Gleskova, Helena ; Cheng, I. Chun ; Wagner, Sigurd ; Sturm, James C. ; Suo, Zhigang. / Mechanics of thin-film transistors and solar cells on flexible substrates. In: Solar Energy. 2006 ; Vol. 80, No. 6. pp. 687-693.
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Mechanics of thin-film transistors and solar cells on flexible substrates. / Gleskova, Helena; Cheng, I. Chun; Wagner, Sigurd; Sturm, James C.; Suo, Zhigang.

In: Solar Energy, Vol. 80, No. 6, 01.06.2006, p. 687-693.

Research output: Contribution to journalArticle

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AU - Gleskova, Helena

AU - Cheng, I. Chun

AU - Wagner, Sigurd

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