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Chang YANG
Chang YANG
Universität Leipzig, Germany
Advances in the development of high performance p-type transparent conducting materials: a study of copper iodide

Over the last decade transparent conducting materials (TCMs) had a dramatic increase in interest in the field of optoelectronics. Most attention has been paid to n-type wide bandgap semiconductors including In2O3, SnO2, ZnO, TiO2 and their doped versions. However, the lack of suitable p-type TCMs has been the main obstacle in front of either passivate or active electronic applications. Copper iodide in the zincblende ground-state phase (γ-CuI) has p-type conductivity with a high Hall mobility (>40 cm2V-1s-1 in bulk), a wide band gap (3.1 eV) with a direct band structure, and a large exciton binding energy (62 meV). These advantageous properties make it a promising p-type TCM. In this talk, room-temperature synthesis and doping techniques, superior TCM performances and highly rectifying diodes of CuI will be presented, which demonstrate the great potential of CuI in optoelectronic applications.

Dr. Chang Yang received his B.Sc. degree from Fudan University (2005) and his Ph.D. degree from Shanghai Institute of Ceramics, Chinese Academy of Sciences (2010). As a postdoc, he joined the Solid State Chemistry Laboratory at the University of Tokyo (2010 - 2014), and the Semiconductor Physics Group at Universität Leipzig (2014 - now). His research focus on the wide bandgap semiconductors for optoelectronics and energy harvesting. His recent work involves p-type transparent conductor CuI and transparent thin film devices.
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