The dominant transport mechanisms for Mg/Zn3P2 junctions are shown to depend on the heat treatment in hydrogen of the Zn3P2 prior to Mg deposition. For heat treatments below 300 °C, multistep tunneling via defect centers dominates, whereas for heat treatments between 300 and 500 °C, recombination/generation dominates. Correspondence is observed between the imperfections responsible for the junction transport and previously reported imperfections in bulk Zn3P2 crystals. Enhanced tunneling under solar illumination contributes to the low energy conversion efficiency of thin Mg film Mg/Zn3P2 devices. An estimate of the interface recombination velocity for these junctions yields a value of 1.9×107 cm/sec.
This paper aims to address the gap of quality control in current Supply Chain Management (SCM) system In the semlconduetor industry. The purpose of this study Is to enhance the SCM system and practices for overall product quality assurance of an outsourced process physically located in different geographic areas. Without visibility and quaUty control, the supply continuity of the outsourced production line could he a t risk. In this paper, we outline the IDM outsourcing demands different requirements from traditional fabless outsourcing, address the issues to meet those new requirements and develop the building process of our Collaborative Quality Control (CQC) model. Our four-year implementation of CQC model indicates that product quality through outsourcing using this upgraded SCM system for quality is as good as internally producing the product. With the CQC model to help secure the supply continuity gives enormous advantages to IDM outsourcing to leverage external resources the same as internal resources. Better capital efficiency, extra virtual capacity, huge surge capability, high flexibility, better cost structure are all critical to improve ROE in such a competitive business environment today.
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