Likely not the same person. From the article:

Author e-mails zhang.zc@om.asahi-kasei.co.jp Author affiliations 1 Innovative Devices R&D Center, Corporate Research & Development, Asahi Kasei Corporation, Fuji, Shizuoka 416-8501, Japan

2 Center for Integrated Research of Future Electronics, Institute of Materials Research and System for Sustainability, Nagoya University, Furo-cho, Chikusa-ku, Aichi 464-8601, Japan

I'm sure some of the people named Will Smith are scientists.

Zhang is an extremely common Chinese family name, so I wouldn't be surprised to see a lot of people with the same name.