Design Principles for the Enhanced Transparency Range of Correlated Transparent Conductors
Youngkyoung Ha, Jinho Byun, Jaekwang Lee, Shinbuhm Lee
Abstract
Abstract Correlated transparent conductors (TCs) have attracted great attention because they can overcome the limitations of conventional TCs owing to their high visible transmittance and low sheet resistance. However, the most widely studied TC 3 d 1 SrVO 3 exhibits low ultraviolet transmittance, and the recently investigated TC 4 d 2 SrMoO 3 has low infrared transmittance. Here, it is proposed that the wide transparency range of correlated TCs arises from both high correlation strength and high transition energy from the O‐2 p to the transition metal d orbitals. Applying this comprehensive design principle to single‐crystalline correlated metals, it is confirmed that correlated 4 d 1 SrNbO 3 exhibits enhanced ultraviolet–visible–infrared transmittance, with low sheet resistance at room temperature, compared to 3 d 1 SrVO 3 and 4 d 2 SrMoO 3 . Spectroscopic ellipsometry, X‐ray photoelectron spectroscopy, and density functional theory calculations reveal that the advantageous properties of 4 d 1 SrNbO 3 can be attributed to high p – d transition energy and moderate correlation effect. The design principle can aid the discovery of additional high‐performance TC materials and further development of correlated TCs.