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.

https://www.mdpi.com/2079-6412/9/2/137/pdf

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

New device concepts and new computing principles are needed to balance our ever-growing appetite for data and information with the realization of the goals of increased energy efficiency, reduction in CO emissions, and the circular economy. Neuromorphic or synaptic electronics is an emerging field of research aiming to overcome the current computer's Von-Neumann bottleneck by building artificial neuronal systems to mimic the extremely energy efficient biological synapses. The introduction of photovoltaic and/or photonic aspects into these neuromorphic architectures will produce self-powered adaptive electronics but may also open new possibilities in artificial neuroscience, artificial neural communications, sensing, and machine learning which would enable, in turn, a new era for computational systems owing to the possibility of attaining high bandwidths with much reduced power consumption. This perspective is focused on recent progress in the implementation of functional oxide thin-films into photovoltaic and neuromorphic applications toward the envisioned goal of self-powered photovoltaic neuromorphic systems or a solar brain.

/pdf/functional-oxides-for-photoneuromorphic-engineering-toward-a-3wh75mkmg9.pdf

Functional Oxides for Photoneuromorphic Engineering: Toward a Solar Brain

The absence of a high-performance p-type transparent semiconductor still remains as a roadblock to the development of future generation optoelectronics. Here, a highly conducting p-type transparent...

A New Highly Conductive Direct Gap p-Type Semiconductor La1–xYxCuOS for Dual Applications: Transparent Electronics and Thermoelectricity

The development of high performance p-type transparent conducting oxides (TCOs) remains as the greatest challenge to the achievement of advanced future optoelectronics including transparent electro...

D. Shi

Papers

Achievement of highly conductive p-type transparent NdCuOS film with Cu deficiency and effective doping