Lee, Seokyeong Kim, Eui Hyuk Yu, Seunggun Kim, Hyerim Park, Chanho Park, Tae Hyun Han, Hyowon Lee, Seung Won Baek, Soyeon Jin, Wookyoung Koo, Chong Min Park, Cheolmin 2024-01-19T17:01:39Z 2024-01-19T17:01:39Z 2021-09-05 2020-08 1616-301X https://pubs.kist.re.kr/handle/201004/118289 MXenes (Ti3C2) are 2D transition-metal carbides and carbonitrides with high conductivity and optical transparency. However, transparent MXene electrodes suitable for polymer light-emitting diodes (PLEDs) have rarely been demonstrated. With the discovery of the excellent electrical stability of MXene under an alternating current (AC), herein, PLEDs that employ MXene electrodes and exhibit high performance under AC operation (AC MXene PLEDs) are presented. The PLED exhibits a turn-on voltage, current efficiency, and brightness of 2.1 V, 7 cd A(-1), and 12 547 cd m(-2), respectively, when operated under AC with a frequency of 1 kHz. The results indicate that the undesirable electric breakdown associated with heat arising from the poor interface of the MXene with a hole transport layer in the direct-current mode is efficiently suppressed by the transient injection of carriers accompanied by the alternating change of the electric polarity under the AC, giving rise to reliable light emission with a high efficiency. The solution-processable MXene electrode can be readily fabricated on a flexible polymer substrate, allowing for the development of a mechanically flexible AC MXene PLED with a higher performance than flexible PLEDs employing solution-processed nanomaterial-based electrodes such as carbon nanotubes, reduced graphene oxide, and Ag nanowires. English WILEY-V C H VERLAG GMBH TRANSPARENT GRAPHENE DEVICES FILMS ELECTRODES TI3C2 SKIN Alternating-Current MXene Polymer Light-Emitting Diodes Article 10.1002/adfm.202001224 1 ADVANCED FUNCTIONAL MATERIALS, v.30, no.32 ADVANCED FUNCTIONAL MATERIALS 30 32 scie scopus 000540627000001 2-s2.0-85089113482 Chemistry, Multidisciplinary Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Chemistry Science & Technology - Other Topics Materials Science Physics Article TRANSPARENT GRAPHENE DEVICES FILMS ELECTRODES TI3C2 SKIN alternating-current light-emitting diodes polymer light-emitting diodes solution-processed flexible electrodes transparent MXene electrodes