A thermally resistant and air-stable n-type organic semiconductor: Naphthalene diimide of 3,5-bis-trifluoromethyl aniline

We report a thermally resistant and air-stable n-type semiconductor based on our study of naphthalene diimide (NTCDI) derivatives (N1, N2, and N3) with various numbers of electron-withdrawing CF3 groups. The device using N3, which contains aromatic NTCDI, was found to exhibit an electron mobility (μe) of 0.15 (±0.04) cm2/V s (the maximum μe observed was 0.24 cm2/V s) and an Ion/Ioff (at Vd = 80 V) of approximately 2 × 105. Moreover, the N3 device exhibits excellent air stability, even when exposed to the open air for 42 days, and significantly better thermal resistance than the previously reported benzylic imide derivative R1.