TY  - JOUR
T1  - Substituent effects on the luminescence and charge transport properties of novel bis-lactam-based molecules
AU  - Kim, Su-Yeon
AU  - Kang, Seokwoo
AU  - Jhun, Byung Hak
AU  - Choi, Min-Woo
AU  - Lee, Hayoon
AU  - Jin, In-Su
AU  - Jung, Jae-Woong
AU  - Park, Jongwook
AU  - Park, Soo Young
JO  - Dyes and Pigments
VL  - 204
SP  - 110465
PY  - 2022
DA  - 2022/08/01/
SN  - 0143-7208
DO  - https://doi.org/10.1016/j.dyepig.2022.110465
UR  - https://www.sciencedirect.com/science/article/pii/S0143720822003874
AB  - A series of bis-lactam-based molecules were synthesized and applied in organic field-effect transistors (OFETs) and organic light-emitting diodes (OLEDs). Among the derivatives, 1,5-dioctyl-3,7-bis(9-phenyl-9H-carbazol-2-yl)-1,5-naphthyridine-2,6-dione (NTD-pCz) exhibited the highest maximum hole mobility of 0.11 cm2 V−1 s−1, with on–off current ratios (Ion/Ioff) of >105 in OFETs, which was attributed to NTD-pCz exhibiting the lowest reorganization energy, extended π-conjugation with a relatively small dihedral angle between the NTD core and the side group, and the strongest intermolecular interaction in the thin-film state. In addition, NTD-pCz exhibited the highest maximum external quantum efficiency of 3.56%, with a current efficiency of 9.95 cd A−1, when incorporated into nondoped OLEDs, which is ascribed to its excellent solid-state photoluminescence quantum yield of 83%. These results reveal the potential of NTD-based molecules for use in efficient next-generation multifunctional optoelectronic devices.
ER  -