P-Type ZnO Films Made by Atomic Layer Deposition and Ion Implantation

Autor: Guoxiu Zhang, Lars Rebohle, Fabian Ganss, Wojciech Dawidowski, Elzbieta Guziewicz, Jung-Hyuk Koh, Manfred Helm, Shengqiang Zhou, Yufei Liu, Slawomir Prucnal
Jazyk: angličtina
Rok vydání: 2024
Předmět:
Zdroj: Nanomaterials, Vol 14, Iss 13, p 1069 (2024)
Druh dokumentu: article
ISSN: 2079-4991
DOI: 10.3390/nano14131069
Popis: Zinc oxide (ZnO) is a wide bandgap semiconductor that holds significant potential for various applications. However, most of the native point defects in ZnO like Zn interstitials typically cause an n-type conductivity. Consequently, achieving p-type doping in ZnO is challenging but crucial for comprehensive applications in the field of optoelectronics. In this work, we investigated the electrical and optical properties of ex situ doped p-type ZnO films. The p-type conductivity has been realized by ion implantation of group V elements followed by rapid thermal annealing (RTA) for 60 s or flash lamp annealing (FLA) on the millisecond time scale in nitrogen or oxygen ambience. The phosphorus (P)-doped ZnO films exhibit stable p-type doping with a hole concentration in the range of 1014 to 1018 cm−3, while antimony (Sb) implantation produces only n-type layers independently of the annealing procedure. Microstructural studies of Sb-doped ZnO show the formation of metallic clusters after ms range annealing and SbZn-oxides after RTA.
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