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Coatings 2019, 9(2), 137; https://doi.org/10.3390/coatings9020137

Transparent p-Type Semiconductors: Copper-Based Oxides and Oxychalcogenides

1,2,†
,
3,†
and
1,*
1
Department of Materials Science and Engineering, National University of Singapore, Singapore 117576, Singapore
2
NUS Graduate School for Integrative Sciences and Engineering, National University of Singapore, Singapore 117456, Singapore
3
Faculty of Materials Science and Chemistry, China University of Geoscience, Wuhan 430074, China
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Received: 31 January 2019 / Revised: 15 February 2019 / Accepted: 16 February 2019 / Published: 20 February 2019
(This article belongs to the Special Issue Thin Films for Electronic Applications)
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Abstract

While p-type transparent conducting materials (TCMs) are crucial for many optoelectronic applications, their performance is still not satisfactory. This has impeded the development of many devices such as photovoltaics, sensors, and transparent electronics. Among the various p-type TCMs proposed so far, Cu-based oxides and oxychalcogenides have demonstrated promising results in terms of their optical and electrical properties. Hence, they are the focus of this current review. Their basic material properties, including their crystal structures, conduction mechanisms, and electronic structures will be covered, as well as their device applications. Also, the development of performance enhancement strategies including doping/co-doping, annealing, and other innovative ways to improve conductivity will be discussed in detail. View Full-Text
Keywords: p-type semiconductors; transparent oxides; delafossite; oxychalcogenide p-type semiconductors; transparent oxides; delafossite; oxychalcogenide
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Zhang, N.; Sun, J.; Gong, H. Transparent p-Type Semiconductors: Copper-Based Oxides and Oxychalcogenides. Coatings 2019, 9, 137.

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