{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

503hw4 - Solution to Homework#4 1 Write the defect...

Info icon This preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Solution to Homework #4 1. Write the defect equations for the following proposed reactions: A. Formation of major defects in PbCl 2 . null V V Pb Cl = + " 2 B. Formation of major defects in CdO which is an n-type semiconductor. CdO Cd O = + + •• int 2 1 2 2 Q or CdO V Cd O O Cd x = + + + •• 2 1 2 2 Q C. Doping CoO, a p-type semiconductor, with Li 2 O; with Cr 2 O 3 ; with MnS; and with CoCl 2 . 1 2 2 2 O V O Co O x = + ¯ + " 1 2 2 2 2 2 2 O Li O Li O Co O x + = + ¯ + Cr O Cr V O Co Co O x 2 3 2 3 = + + " MnS Mn S Co x O x = + CoCl Cl V Co O Co Co x 2 2 = + + " D. Formation of major defects in AgI. AgI V Ag I Ag I x = + + int (Frenkel) E. Doping AgI with CdI 2 ; with Ag 2 S; and with AgCl. CdI Cd V I Ag Ag I x 2 2 = + + Ag S S Ag Ag I Ag x 2 = + + int AgCl Ag Cl Ag x I x = + 2. Obtain an expression for the diffusion coefficient of nickel in NiO as a function of oxygen pressure. NiO — p-type, cation deficient \ 1 2 2 2 O O V O x Ni = + + ¯ " (1) [ ] [ ] K P V O Ni 1 1 2 2 2 ° = ° ¯ / " (2) [ ] [ ] 2 V Ni " = ¯ (3) solve for [ ] V Ni " from (2) and (3): [ ] V K P Ni O " / 3 1 1 2 4 2 = ° or [ ] V
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern