| The materials Fe2(Si,Ge)(S,Se)4, Cu 3PS4-xSex (0 ≤ x ≤ 4), and Cu3P xAs1-xS4 (0 ≤ x ≤ 1) have been synthesized and studied as new earth-abundant absorbers for single and multijunction photovoltaic cells as well as solar fuel generation. The synthesis, single-crystal growth, and optical and electrical properties of these materials are described and discussed in Chapter 2, 3, and 4. Inspired by the photovoltaic absorber Cu 2ZnSnS4, the new compound CuZnPS4 has been discovered; its structure and properties are discussed in Chapter 5, including a comparative analysis to Cu3PS4. The compound YZrF7 (Chapter 6) has been synthesized and evaluated for the first time as a new optical host for green up-conversion. |
