Park, Young Ran Kim, Hyeong Jin Im, Sungjin Seo, Sunae Shin, Koo Choi, Won Kook Hong, Young Joon 2024-01-20T05:03:46Z 2024-01-20T05:03:46Z 2022-01-25 2016-01 0003-6951 https://pubs.kist.re.kr/handle/201004/124524 We report the tailoring of the electronic structure of poly(N-vinylcarbazole) (PVK) using a mixture layer of polyaniline: poly(p-styrenesulfonic acid) (PANI:PSS) in organic multilayer PVK/PANI: PSS/poly(3,4-ethylenedioxythiophene):PSS heterojunctions. The overall electronic structure of the PVK overlayer was systematically down-shifted while the work function of PANI: PSS increased as a function of the PSS-to-PANI weight ratio for the ratio range from 1 to 11 in the PANI: PSS film. The down-shift in the highest occupied molecular orbital of PVK markedly reduced the hole injection barrier from PVK to quantum-dot (QD) layers in QD-light emitting diode (QD-LED) structures, resulting in superior electrical and electroluminescent characteristics for QD-LEDs. The influences of PANI: PSS thickness on the electronic structure of PVK and the performance of QD-LEDs are also discussed. (C) 2016 AIP Publishing LLC. English AMER INST PHYSICS Tailoring the highest occupied molecular orbital level of poly(N-vinylcarbazole) hole transport layers in organic multilayer heterojunctions Article 10.1063/1.4939910 1 APPLIED PHYSICS LETTERS, v.108, no.2 APPLIED PHYSICS LETTERS 108 2 N scie scopus 000370258400047 2-s2.0-84954342144 Physics, Applied Physics Article LIGHT-EMITTING-DIODES ELECTRONIC-STRUCTURE QUANTUM DOTS EFFICIENT POLYMER DEVICES INTERFACES ORIENTATION MORPHOLOGY INJECTION