Kim, Hyeok Kim, Seongmin Nam, Youngmin Song, Dong-Seok Park, Suyeon Lee, Changhee Kim, Sungjin Lee, Doh-Kwon Bae, Jin-Hyuk 2024-01-20T06:32:22Z 2024-01-20T06:32:22Z 2021-09-05 2015-08 1555-130X https://pubs.kist.re.kr/handle/201004/125179 Electrons and hole carrier imbalance causes a drastic roll-off of the current efficiency in organic light-emitting diodes. Charge injection is used to maintain the charge balance between the electrons and the holes. We demonstrated that the roll-off characteristic depends on the injection barrier in the emission layer that governs the charge balance in the emission layer. Furthermore, the improvement in the roll-off characteristic of the current efficiency is described. We also explained how charge balance is achieved by varying the injection barrier in organic light-emitting diodes. English AMER SCIENTIFIC PUBLISHERS LIGHT-EMITTING-DIODES CARRIER Charge Injection-Assisted Current Efficiency Improvement in Roll-Off Characteristic of OLEDs by Device Modeling Article 10.1166/jno.2015.1805 1 JOURNAL OF NANOELECTRONICS AND OPTOELECTRONICS, v.10, no.4, pp.578 - 581 JOURNAL OF NANOELECTRONICS AND OPTOELECTRONICS 10 4 578 581 scie scopus 000360534900030 2-s2.0-84938301152 Engineering, Electrical & Electronic Nanoscience & Nanotechnology Physics, Applied Engineering Science & Technology - Other Topics Physics Article LIGHT-EMITTING-DIODES CARRIER Charge Injection Device Simulation Roll-Off Current Efficiency OLEDs