Table 2 Comparison of the current efficiencies of Gr-VOLETs (ηC Gr-OLET) and ITO-based control OLEDs (ηC OLED) with their ηC Gr-OLET/ηC OLED ratios at a luminance level of 500 cd/m2.

From: Full-surface emission of graphene-based vertical-type organic light-emitting transistors with high on/off contrast ratios and enhanced efficiencies

Devices

ηC Gr-OLET (cd/A)

ηC OLED (cd/A)

ηC Gr-OLET/ηC OLEDa

Gr-VOLET1

7.13

4.64

1.54

Gr-VOLET2

2.92

4.64

0.63

Gr-VOLET3

3.72

5.17

0.72

  1. aRatio of the current efficiency of a full-surface emitting Gr-OLET to that of the control ITO-based OLED for a given luminance level of 500 cd/m2.
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