TY  - JOUR
T1  - Enhancing OLED emitter efficiency through increased rigidity
A1  - Godi, Mahendra
A1  - Kwon, Hyukmin
A1  - Park, Sangwook
A1  - Park, Sunwoo
A1  - Lee, Hayoon
A1  - Lee, Kiho
A1  - Park, Jongwook
Y1  - 2024
SP  - 8135
EP  - 8144
JF  - RSC Advances
JO  - RSC Adv.
VL  - 14
IS  - 12
PB  - The Royal Society of Chemistry
SN  - 
DO  - 10.1039/D3RA07937F
M3  - 10.1039/D3RA07937F
UR  - http://dx.doi.org/10.1039/D3RA07937F
N2  - Three new blue materials, TPI-InCz, PAI-InCz, and CN-PAI-InCz, have been developed. In the film state, TPI-InCz and PAI-InCz exhibited emission peaks at 411 and 431 nm indicating deep blue emission. CN-PAI-InCz showed a peak emission at 452 nm, within the real blue region. When these three materials were used as the emissive layer to fabricate non-doped devices, CN-PAI-InCz showed the highest current efficiency of 2.91 cd A−1, power efficiency of 1.93 lm W−1, and external quantum efficiency of 3.31%. Among the synthesized materials, CN-PAI-InCz exhibited superior charge balance due to the introduction of CN groups, as confirmed by hole-only devices and electron-only devices. PAI-InCz demonstrated fast hole mobility with a value of 1.50 × 10−3 cm2 V−1 s−1, attributed to its planar and highly rigid structure. In the resulting devices, the Commission Internationale de l'Eclairage coordinates for TPI-InCz, PAI-InCz, and CN-PAI-InCz were (0.162, 0.048), (0.0161, 0.067), and (0.155, 0.099), all indicating emission in the blue region.
ER  -