Large Size and High Resolution Organic Light Emitting Diodes Based on the In-Ga-Zn-O Thin Film Transistors with a Coplanar Structure

Hong Jae Shin

doi:10.3740/MRSK.2023.33.12.511

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2023 Vol.33, Issue 12 Preview Page Next Page

Research Paper

Large Size and High Resolution Organic Light Emitting Diodes Based on the In-Ga-Zn-O Thin Film Transistors with a Coplanar Structure

27 December 2023. pp. 511-516

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Abstract

Amorphous In-Ga-Zn-O (a-IGZO) thin film transistors (TFTs) with a coplanar structure were fabricated to investigate the feasibility of their potential application in large size organic light emitting diodes (OLEDs). Drain currents, used as functions of the gate voltages for the TFTs, showed the output currents had slight differences in the saturation region, just as the output currents of the etch stopper TFTs did. The maximum difference in the threshold voltages of the In-Ga-Zn-O (a-IGZO) TFTs was as small as approximately 0.57 V. After the application of a positive bias voltage stress for 50,000 s, the values of the threshold voltage of the coplanar structure TFTs were only slightly shifted, by 0.18 V, indicative of their stability. The coplanar structure TFTs were embedded in OLEDs and exhibited a maximum luminance as large as 500 nits, and their color gamut satisfied 99 % of the digital cinema initiatives, confirming their suitability for large size and high resolution OLEDs. Further, the image density of large-size OLEDs embedded with the coplanar structure TFTs was significantly enhanced compared with OLEDs embedded with conventional TFTs.

Keywords

thin film transistor

amorphous In-Ga-Zn-O

coplanar structure

large size and high resolution organic light emitting diodes

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Information

Publisher :Materials Research Society of Korea
Publisher(Ko) :한국재료학회
Journal Title :Korean Journal of Materials Research
Journal Title(Ko) :한국재료학회지
Volume : 33
No :12
Pages :511-516
Received Date : 2023-11-23
Revised Date : 2023-11-30
Accepted Date : 2023-12-04
DOI :https://doi.org/10.3740/MRSK.2023.33.12.511

Korean Journal of Materials Research ISSN:1225-0562(Print) 2287-7258(Online) 한국재료학회지

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