The major research interest covers a broad range of topics concerned with the fundamental properties of shallow - levels in semiconductors and with impurity related issues of importance to semiconductor physics and technology , e . g . , single and multiple donors and acceptors , shallow excited states of deep - level impurities , defect interaction on the atomic scale such as impurity - pair or complex formation 主要研究方向涵括半導體物理與技術方面有關雜質之重要領域,例如施者與受者雜質、淺與深雜質、雜質能階、雜質光譜、雜質與雜質或缺陷相互間之交互作用,以及復合雜質之形成與特性等。