TY - JOUR
T1 - Thermally Activated Delayed Fluorescence of Dibenzophenazine-Cored Phenazaborines in Solid State
T2 - Anion Modulation of Photophysics
AU - Lingagouder, Jaijanarthanan
AU - Aota, Nae
AU - Nakagawa, Riku
AU - Luszczynska, Beata
AU - Minakata, Satoshi
AU - de Sousa, Leonardo Evaristo
AU - de Silva, Piotr
AU - Data, Przemyslaw
AU - Takeda, Youhei
PY - 2024
Y1 - 2024
N2 - The relentless pursuit of high-performance organic light-emitting diodes (OLEDs) necessitates the exploration of novel materials with efficient light emission. Herein, we report donor–acceptor–donor (D–A–D) compounds, incorporating dibenzo[a,j]phenazine (DBPHZ) as the acceptor (A) and phenazaborine (PAzB) derivatives as the donors (D), embedded in various hosts, and investigate their impact on emission mechanisms. This study examines the effect of strategic fluorination of the trivalent boron center on the performance of the D–A–D compounds as solid-state emitters. The incorporation of fluoride into the D–A–D compounds within the matrix films resulted in a red shift in the photoluminescence (PL) emission. Additionally, we evaluated the influence of fluoride addition on the delayed emission characteristics of the D–A–D-containing films. This solid-state modulation technique demonstrated a potential applicability to OLEDs. Quantum chemical calculations elucidated how fluoride incorporation alters the photophysical properties of the compounds by modifying the electronic characteristics of the excited states.
AB - The relentless pursuit of high-performance organic light-emitting diodes (OLEDs) necessitates the exploration of novel materials with efficient light emission. Herein, we report donor–acceptor–donor (D–A–D) compounds, incorporating dibenzo[a,j]phenazine (DBPHZ) as the acceptor (A) and phenazaborine (PAzB) derivatives as the donors (D), embedded in various hosts, and investigate their impact on emission mechanisms. This study examines the effect of strategic fluorination of the trivalent boron center on the performance of the D–A–D compounds as solid-state emitters. The incorporation of fluoride into the D–A–D compounds within the matrix films resulted in a red shift in the photoluminescence (PL) emission. Additionally, we evaluated the influence of fluoride addition on the delayed emission characteristics of the D–A–D-containing films. This solid-state modulation technique demonstrated a potential applicability to OLEDs. Quantum chemical calculations elucidated how fluoride incorporation alters the photophysical properties of the compounds by modifying the electronic characteristics of the excited states.
U2 - 10.1021/acs.jpcc.4c05319
DO - 10.1021/acs.jpcc.4c05319
M3 - Journal article
SN - 1932-7447
VL - 128
SP - 16805
EP - 16812
JO - Journal of Physical Chemistry C
JF - Journal of Physical Chemistry C
IS - 39
ER -