Charge-transfer-featured materials—promising hosts for fabrication of efficient OLEDs through triplet harvesting via triplet fusion†
Abstract
A charge-transfer-featured naphthalimide derivative with a small exchange energy but a lower lying 3ππ* state than 3CT state is found to contribute to triplet harvesting through a P-type rather than an E-type delayed fluorescence, and could act as a quite promising host to achieve highly efficient OLEDs.