Category Archives: Others

Highly Flexible and Efficient Fabric Based Organic Light-Emitting Devices for Clothing-Shaped Wearable Displays

Journal: Scientific Reports

Publication date: 2017.07.25

Summarized by Seongmin Park

 

– Methods to achieve actual clothing-shaped information displays

  1. Attaching a display panel onto a piece of clothing → Flexibility decreases
  2. Fabricating of light emitting fiber → Low emission performance
  3. Fabricating an information display onto a fabric → Best choice

– Novel Concept

v. Spin coating of the silane-based film on fabric (Fig. 1, 2)

fig1

Fig. 1

fig2

Fig. 2

– Structure

  1. Base Structure (Fig.3)

fig3

Fig. 3

     2. Endurance vs. Number of dyads (Fig. 4, 5)

fig4

Fig. 4

fig5

Fig. 5

     3. Optimized Structure (Fig. 6)

fig6

Fig. 6

     4. Good Endurance

fig7

Fig. 7

 

– Results

  1. Similar performance (Fig. 8)

fig8

Fig. 8

     2. Light emitting performances vs. bending radius (Fig. 9)

fig9

Fig. 9

     3. Comparison between OLEDs on fabric and OLEDs on PET (Fig. 10)

fig10

Fig. 10

     4. Cyclic bending with bending radius of 1 cm (Fig. 11)

fig11

Fig. 11

 

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Fully Printable, Strain-engineered Electronic Wrap for Customizable Soft Electronics

Journal: Scientific Reports

Publication date: 2017. 03. 24

Summarized by Inyeol Yun

 

– Concept

v. PDMS-PRI-PDMS Structure (Fig. 1)

v. Devices (LEDs, IC Chips) are mounted on PRI (Printed Rigid Island).

v. Concept from stretchable beat network (Fig. 2)

v. Device (bead) is stable because stress is concentrated on PDMS (spring) when mechanical deformation is applied to the wrap. (Fig. 3)

v. Printed silver wire was encapsulated by PDMS -> prevent silver wire deformation

fig1

Fig. 1

fig2

Fig. 2

fig3

Fig. 3

 

– Fabrication

v. Fabrication process of the PRI-embedded soft wrap (Fig. 4)

v. Devices were bonded with inkjet-printed Ag pads via Ag epoxy. (Fig. 5)

fig4.png

Fig. 4

fig5

Fig. 5