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Course information comes from the public UCLA General Catalog. Requisites are read from UCLA’s published wording and can be incomplete or out of date — check the official catalog listing and your department adviser before you enroll.

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MAT SCI 121 · MSE 121Materials Science of Semiconductors

Materials Science and Engineering · 4 units · Undergraduate upper division (100-199)

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Structure and properties of elemental and compound semiconductors. Electrical and optical properties, defect chemistry, and doping. Electronic materials analysis and characterization, including electrical, optical, and ion-beam techniques. Heterostructures, band-gap engineering, development of new materials for optoelectronic applications.

Letter grading.

When it runs

  • Spring 2026
  • Spring 2027

Scheduled, not typical — from UCLA’s Schedule of Classes, which publishes Fall 2025 through Spring 2027 and nothing before it.

Requisites

Official UCLA wording

Enforced requisite: course 120.

BruinTree reads · Prerequisite

confidence 1.00 · from text
MAT SCI 120

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About MAT SCI 121. We read UCLA’s requisite wording by machine, and it gets things wrong.

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Requires

Everything that has to come before this course, not just the courses named in the requisite above.

MAT SCI 121

  • MAT SCI 120Physics of Materials
    • MAT SCI 104Science of Engineering Materials
      • PHYSICS 1APhysics for Scientists and Engineers: Mechanics2 more beneath
      • CHEM 20AChemical Structure1 more beneath
      • PHYSICS 1BPhysics for Scientists and Engineers: Oscillations, Waves, Electric and Magnetic Fields1 more beneath
      • CHEM 20BChemical Energetics and Changeanother path to it
      • CHEM 20LGeneral Chemistry Laboratory2 more beneath
    • MAT SCI 110Introduction to Materials Characterization A (Crystal Structure, Nanostructures, and X-Ray Scattering)
      • MAT SCI 104Science of Engineering Materialsanother path to it
    • CHEM 113APhysical Chemistry: Introduction to Quantum Mechanics5 more beneath
      • MATH 32ACalculus of Several Variables1 more beneath
      • PHYSICS 1APhysics for Scientists and Engineers: Mechanicsanother path to it
      • CHEM 20BChemical Energetics and Change5 more beneath
      • MATH 32BCalculus of Several Variables1 more beneath
      • PHYSICS 1AHPhysics for Scientists and Engineers: Mechanics (Honors)2 more beneath
      • MATH 33ALinear Algebra and Applications2 more beneath
      • PHYSICS 1BPhysics for Scientists and Engineers: Oscillations, Waves, Electric and Magnetic Fieldsanother path to it
      • PHYSICS 1BHPhysics for Scientists and Engineers: Oscillations, Waves, Electric and Magnetic Fields (Honors)1 more beneath

1 direct requisite. Showing 18 courses over 3 levels; the branches marked with a count carry on past it. Every course here opens its own tree.

Unlocks

What this course is a requisite for, and what those courses lead to in turn.

MAT SCI 121

  • MAT SCI 121LMaterials Science of Semiconductors Laboratory

1 course lists this as a requisite. The whole downstream is here — 1 course over 1 level. Every course here opens its own tree.