Stretchable Active Matrix Inorganic Light‐Emitting Diode Display Enabled by Overlay‐Aligned Roll‐Transfer Printing

An active matrix‐type stretchable display is realized by overlay‐aligned transfer of inorganic light‐emitting diode (LED) and single‐crystal Si thin film transistor (TFT) with roll processes. The roll‐based transfer enables integration of heterogeneous thin film devices on a rubber substrate while p...

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Bibliographic Details
Published in:Advanced functional materials 2017-03, Vol.27 (11), p.np-n/a
Main Authors: Choi, Minwoo, Jang, Bongkyun, Lee, Wonho, Lee, Seonwoo, Kim, Tae Woong, Lee, Hak‐Joo, Kim, Jae‐Hyun, Ahn, Jong‐Hyun
Format: Article
Language:English
Subjects:
active matrix
Alignment
Devices
Electron mobility
Inorganic materials
Light emitting diodes
Materials science
Optical properties
Printing
Product development
roll transfer
Rolls
Rubber
Semiconductor devices
Silicon dioxide
Single crystals
single‐crystal Si
stretchable displays
Thin film transistors
Thin films
Transfer printing
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Summary:An active matrix‐type stretchable display is realized by overlay‐aligned transfer of inorganic light‐emitting diode (LED) and single‐crystal Si thin film transistor (TFT) with roll processes. The roll‐based transfer enables integration of heterogeneous thin film devices on a rubber substrate while preserving excellent electrical and optical properties of these devices, comparable to their bulk properties. The electron mobility of the integrated Si‐TFT is over 700 cm2 V−1 s−1, and this is attributed to the good interface between the Si channel and the thermally grown SiO2 insulator. The light emission properties of the LED are of wafer quality. The resulting display stably operates under tensile strains up to 40%, over 200 cycles, demonstrating the potential of stretchable displays based on inorganic materials. All‐inorganic‐based stretchable active matrix display is demonstrated by integration of inorganic light‐emitting diode and single‐crystal Si thin film transistor. Overlay‐aligned roll transfer technique provides good integration of two devices on rubber substrate with outstanding electrical and optical properties. Furthermore, a serpentine‐shaped interconnector allows the effective strain division for stable operation of display over 40% applied strain.
ISSN:1616-301X
1616-3028
DOI:10.1002/adfm.201606005