氨熱法氮化鎵單晶生長研究進(jìn)展及面臨的挑戰(zhàn)Progress and Challenges in Bulk GaN Crystal Growth by Ammonothermal Method任國強(qiáng)中國科學(xué)院蘇州納米技術(shù)與納米仿生研究所、研究員REN GuoqiangProfessorof Suzhou Institute of Nano-Tech and Nano-Bionics (SINANO), Chinese Academy of Sciences