A transparent p-type semiconductor designed via a polarizability-enhanced strongly correlated insulator oxide matrix

Abstract

Electron-transporting transparent conducting oxides (TCOs) are a commercial reality, however, hole-transporting counterparts are far more challenging because of limited material design. Here, we propose a strategy for enhancing the hole conductivity without deteriorating the band gap (Eg) and workfunction (Φ) by Cu incorporation in a strongly correlated NiWO4 insulator. The optimal Cu-doped NiWO4 (Cu0.185Ni0.815WO4) exhibits a resistivity reduction of ∼109 times versus NiWO4 as well as band-like charge transport with the hole mobility approaching 7 cm2 V−1 s−1 at 200 K, a deep Φ of 5.77 eV, and Eg of 2.8 eV. Experimental and theoretical data reveal that the strength of the electron correlation in NiWO4 is unaffected by Cu incorporation, while the promoted polarizability weakens electron–phonon coupling, promoting the formation of large polarons. Quantum dot light-emitting and oxide p/n junction devices incorporating Cu0.185Ni0.815WO4 exhibit remarkable performances, demonstrating that our approach can be deployed to discover new p-type TCOs.

Graphical abstract: A transparent p-type semiconductor designed via a polarizability-enhanced strongly correlated insulator oxide matrix

Supplementary files

Transparent peer review

To support increased transparency, we offer authors the option to publish the peer review history alongside their article.

View this article’s peer review history

Article information

Article type
Communication
Submitted
28 Jul 2024
Accepted
25 Sep 2024
First published
26 Sep 2024

Mater. Horiz., 2024, Advance Article

A transparent p-type semiconductor designed via a polarizability-enhanced strongly correlated insulator oxide matrix

S. Y. Lee, I. Kim, H. J. Kim, S. Sim, J. Lee, S. Yun, J. Bang, K. W. Park, C. J. Han, H. Kim, H. Yang, B. Kim, S. Im, A. Facchetti, M. S. Oh, K. H. Lee and K. Lee, Mater. Horiz., 2024, Advance Article , DOI: 10.1039/D4MH00985A

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements