comscore Organic LEDs could help make next gen foldable computers
News

Organic LEDs could help make next gen foldable computers

Computers that roll up like a paper may soon be closer to reality.

  • Updated: June 7, 2016 11:35 AM IST
oled-image-1

Ultrathin and lightweight computers that roll up like a piece of paper may be closer to reality, thanks to highly flexible organic light-emitting diodes (OLEDs) developed by Korean scientists. The OLEDs have excellent efficiency and make use of graphene as a transparent electrode, researchers said. OLEDs, built upon a plastic substrate, have received greater attention lately for their use in next-generation displays that can be bent or rolled while still operating. Also Read - Facebook for Android will soon get dark mode and coronavirus tracking feature

Also Read - Scientists develop soft contact lens that can zoom with a blink

Researchers led by Seunghyup Yoo from Korea Advanced Institute of Science (KAIST) and Tae-Woo Lee from Pohang University of Science and Technology (POSTECH) in South Korea used graphene as a transparent electrode (TE) which is placed in between titanium dioxide (TiO2) and conducting polymer layers. OLEDs are stacked in several ultra-thin layers on glass, foil, or plastic substrates, in which multi-layers of organic compounds are sandwiched between two electrodes. When Also Read - Increasing smartphone usage may be resulting in growing horns on our skull; research suggests

When voltage is applied across the electrodes, electrons from the cathode and holes (positive charges) from the anode draw towards each other and meet in the emissive layer. OLEDs emit light as an electron recombines with a positive hole, releasing energy in the form of a photon. One of the electrodes in OLEDs is usually transparent, and depending on which electrode is transparent, OLEDs can either emit from the top or bottom. In conventional bottom-emission OLEDs, an anode is transparent in order for the emitted photons to exit the device through its substrate. Indium-tin-oxide (ITO) is commonly used as a transparent anode because of its high transparency, low sheet resistance, and well-established manufacturing process.

ALSO READ: Apple iPhone 8 to use OLED display: Report

However, ITO is expensive and brittle, being susceptible to bending-induced formation of cracks. Graphene, a two-dimensional thin layer of carbon atoms tightly bonded together in a hexagonal honeycomb lattice, has recently emerged as an alternative to ITO. However, efficiency of graphene-based OLEDs reported to date has been about the same level of ITO-based OLEDs.

ALSO READ: Xiaomi Mi Band 2 with OLED display launched, priced around Rs 1,500: Specifications, features

Researchers proposed a new device architecture that can maximise the efficiency of graphene-based OLEDs. They fabricated a transparent anode in which a TiO2 layer with a high refractive index (high-n) and a hole-injection layer of conducting polymers with a low refractive index (low-n) sandwich graphene electrodes. This is an optical design that induces a synergistic collaboration between the high-n and low-n layers to increase the effective reflectance of TEs. Under this approach, graphene-based OLED devices remain intact and operate well even after 1,000 bending cycles at a radius of curvature as small as 2.3 mm. “We expect that our technology will pave the way to develop an OLED light source for highly flexible and wearable displays, or flexible sensors that can be attached to the human body for health monitoring, for instance,” Lee said.

For the latest tech news across the world, latest PC and Mobile games, tips & tricks, top-notch gadget reviews of most exciting releases follow BGR India’s Facebook, Twitter, subscribe our YouTube Channel. Also follow us on  Facebook Messenger for latest updates.
  • Published Date: June 7, 2016 11:30 AM IST
  • Updated Date: June 7, 2016 11:35 AM IST



new arrivals in india

Micromax In 2b
Micromax In 2b

8,999

Vivo Y72 5G
Vivo Y72 5G

20,990

Tecno Camon 17
Tecno Camon 17

12,999

Tecno Camon 17 Pro
Tecno Camon 17 Pro

16,999

Realme C11 2021
Realme C11 2021

6,999

Oppo Reno6 Pro 5G
Oppo Reno6 Pro 5G

39,990

Oppo Reno6 5G
Oppo Reno6 5G

29,990

Samsung Galaxy M21 2021
Samsung Galaxy M21 2021

12,499

OnePlus Nord 2
OnePlus Nord 2

27,999

Poco F3 GT
Poco F3 GT

27,999

Samsung Galaxy A22 5G
Samsung Galaxy A22 5G

19,999

Xiaomi Redmi Note 10T 5G
Xiaomi Redmi Note 10T 5G

13,999

Samsung Galaxy F22
Samsung Galaxy F22

12,499

Xiaomi Mi 11 Lite
Xiaomi Mi 11 Lite

21,999

Infinix Note 10 Pro
Infinix Note 10 Pro

16,999

Infinix Note 10
Infinix Note 10

10,999

Vivo Y73
Vivo Y73

20,990

OnePlus Nord CE 5G
OnePlus Nord CE 5G

22,999

iQOO Z3
iQOO Z3

19,990

Realme C25s
Realme C25s

9,999

Poco M3 Pro 5G
Poco M3 Pro 5G

13,999

Realme X7 Max 5G
Realme X7 Max 5G

26,999

Oppo F19
Oppo F19

18,990

Motorola Moto G40 Fusion
Motorola Moto G40 Fusion

13,999

POCO M2 Reloaded
POCO M2 Reloaded

9,499

OPPO A74 5G
OPPO A74 5G

17,990

Oppo A53s 5G
Oppo A53s 5G

14,990

Vivo V21 5G
Vivo V21 5G

29,990

Realme C25
Realme C25

9,499

Realme C21
Realme C21

7,999

Realme C20
Realme C20

6,799

Motorola Moto G60
Motorola Moto G60

17,999

iQOO 7
iQOO 7

31,990

Samsung Galaxy M42 5G
Samsung Galaxy M42 5G

21,999

Xiaomi Mi 11 Ultra
Xiaomi Mi 11 Ultra

69,999

Xiaomi Mi 11X Pro 5G
Xiaomi Mi 11X Pro 5G

39,999

Xiaomi Mi 11X
Xiaomi Mi 11X

29,999

Realme 8 5G
Realme 8 5G

13,999

Samsung Galaxy F02s
Samsung Galaxy F02s

8,999

Samsung Galaxy F12
Samsung Galaxy F12

10,999

POCO X3 Pro
POCO X3 Pro

18,999

Realme 8 Pro
Realme 8 Pro

17,999

Realme 8
Realme 8

14,999

Vivo X60 Pro Plus
Vivo X60 Pro Plus

69,990

Vivo X60 Pro
Vivo X60 Pro

49,990

Vivo X60
Vivo X60

37,990

OnePlus 9 Pro 5G
OnePlus 9 Pro 5G

64,999

OnePlus 9R 5G
OnePlus 9R 5G

39,999

OnePlus 9 5G
OnePlus 9 5G

49,999

Samsung Galaxy A72
Samsung Galaxy A72

34,999

Samsung Galaxy A52
Samsung Galaxy A52

26,499

Micromax In 1
Micromax In 1

10,499

Asus ROG Phone 5
Asus ROG Phone 5

49,999

Samsung Galaxy M12
Samsung Galaxy M12

10,999

Motorola Moto G30
Motorola Moto G30

10,999

Motorola Moto G10 Power
Motorola Moto G10 Power

9,999

Oppo F19 Pro Plus 5G
Oppo F19 Pro Plus 5G

25,990

Oppo F19 Pro
Oppo F19 Pro

21,490

Xiaomi Redmi Note 10 Pro Max
Xiaomi Redmi Note 10 Pro Max

18,999

Xiaomi Redmi Note 10 Pro
Xiaomi Redmi Note 10 Pro

15,999

Xiaomi Redmi Note 10
Xiaomi Redmi Note 10

11,999

Realme Narzo 30A
Realme Narzo 30A

8,999

Realme Narzo 30 Pro
Realme Narzo 30 Pro

16,999

Infinix Smart 5
Infinix Smart 5

7,199

Samsung Galaxy F62
Samsung Galaxy F62

23,999

Samsung Galaxy A12
Samsung Galaxy A12

12,999

Nokia 5.4
Nokia 5.4

13,999

Nokia 3.4
Nokia 3.4

11,999

Realme X7 Pro 5G
Realme X7 Pro 5G

29,999

Realme X7
Realme X7

19,999

Vivo Y31
Vivo Y31

16,490

Oppo Reno5 Pro 5G
Oppo Reno5 Pro 5G

35,990

Samsung Galaxy S21 Ultra 5G
Samsung Galaxy S21 Ultra 5G

1,05,999

Samsung Galaxy S21 Plus 5G
Samsung Galaxy S21 Plus 5G

81,999

Samsung Galaxy S21 5G
Samsung Galaxy S21 5G

69,999

Vivo Y12s
Vivo Y12s

9,990

Vivo Y51A
Vivo Y51A

17,990

Samsung Galaxy M02s
Samsung Galaxy M02s

8,999

Xiaomi Mi 10i
Xiaomi Mi 10i

21,999

Oppo A15s
Oppo A15s

11,490

Tecno Spark 6 Go
Tecno Spark 6 Go

8,499

Vivo V20 2021
Vivo V20 2021

24,990

Vivo Y20A
Vivo Y20A

11,490

Xiaomi Redmi 9 Power
Xiaomi Redmi 9 Power

11,999

Motorola Moto G9 Power
Motorola Moto G9 Power

11,999

Motorola Moto G 5G
Motorola Moto G 5G

20,999

Vivo V20 Pro
Vivo V20 Pro

29,990

Xiaomi Mi 10T
Xiaomi Mi 10T

35,999

Xiaomi Redmi 9i
Xiaomi Redmi 9i

8,299

Xiaomi Mi 10T Pro
Xiaomi Mi 10T Pro

39,999

Infinix Hot 10
Infinix Hot 10

9,999

Vivo V20 SE
Vivo V20 SE

20,990

Vivo V20
Vivo V20

24,990

Micromax In 1b
Micromax In 1b

6,999

Micromax In Note 1
Micromax In Note 1

10,999

OnePlus 8T
OnePlus 8T

42,999

Samsung Galaxy F41
Samsung Galaxy F41

15,499

Best Sellers