Abstract
Thermally activated delayed fluorescence (TADF) materials have shown great potential for highly efficient organic light-emitting diodes (OLEDs). While the current molecular design of TADF materials primarily focuses on combining donor and acceptor units, we present a novel system based on the use of excited-state intramolecular proton transfer (ESIPT) to achieve efficient TADF without relying on the well-established donor-acceptor scheme. In an appropriately designed acridone-based compound with intramolecular hydrogen bonding, ESIPT leads to separation of the highest occupied and lowest unoccupied molecular orbitals, resulting in TADF emission with a photoluminescence quantum yield of nearly 60%. High external electroluminescence quantum efficiencies of up to 14% in OLEDs using this emitter prove that efficient triplet harvesting is possible with ESIPT-based TADF materials. This work will expand and accelerate the development of a wide variety of TADF materials for high performance OLEDs.
| Original language | English |
|---|---|
| Pages (from-to) | 769-777 |
| Number of pages | 9 |
| Journal | Journal of Vacuum Science and Technology |
| Volume | 3 |
| Issue number | 7 |
| DOIs | |
| Publication status | Published - Jul 26 2017 |
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Highly Efficient Thermally Activated Delayed Fluorescence from an Excited-State Intramolecular Proton Transfer System. / Mamada, Masashi; Inada, Ko; Komino, Takeshi; Potscavage, William J; Nakanotani, Hajime; Adachi, Chihaya.
In: Journal of Vacuum Science and Technology, Vol. 3, No. 7, 26.07.2017, p. 769-777.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Highly Efficient Thermally Activated Delayed Fluorescence from an Excited-State Intramolecular Proton Transfer System
AU - Mamada, Masashi
AU - Inada, Ko
AU - Komino, Takeshi
AU - Potscavage, William J
AU - Nakanotani, Hajime
AU - Adachi, Chihaya
PY - 2017/7/26
Y1 - 2017/7/26
N2 - Thermally activated delayed fluorescence (TADF) materials have shown great potential for highly efficient organic light-emitting diodes (OLEDs). While the current molecular design of TADF materials primarily focuses on combining donor and acceptor units, we present a novel system based on the use of excited-state intramolecular proton transfer (ESIPT) to achieve efficient TADF without relying on the well-established donor-acceptor scheme. In an appropriately designed acridone-based compound with intramolecular hydrogen bonding, ESIPT leads to separation of the highest occupied and lowest unoccupied molecular orbitals, resulting in TADF emission with a photoluminescence quantum yield of nearly 60%. High external electroluminescence quantum efficiencies of up to 14% in OLEDs using this emitter prove that efficient triplet harvesting is possible with ESIPT-based TADF materials. This work will expand and accelerate the development of a wide variety of TADF materials for high performance OLEDs.
AB - Thermally activated delayed fluorescence (TADF) materials have shown great potential for highly efficient organic light-emitting diodes (OLEDs). While the current molecular design of TADF materials primarily focuses on combining donor and acceptor units, we present a novel system based on the use of excited-state intramolecular proton transfer (ESIPT) to achieve efficient TADF without relying on the well-established donor-acceptor scheme. In an appropriately designed acridone-based compound with intramolecular hydrogen bonding, ESIPT leads to separation of the highest occupied and lowest unoccupied molecular orbitals, resulting in TADF emission with a photoluminescence quantum yield of nearly 60%. High external electroluminescence quantum efficiencies of up to 14% in OLEDs using this emitter prove that efficient triplet harvesting is possible with ESIPT-based TADF materials. This work will expand and accelerate the development of a wide variety of TADF materials for high performance OLEDs.
U2 - 10.1021/acscentsci.7b00183
DO - 10.1021/acscentsci.7b00183
M3 - Article
VL - 3
SP - 769
EP - 777
JO - ACS Central Science
JF - ACS Central Science
SN - 0022-5355
IS - 7
ER -