Introduces concepts and laboratory methods in chemistry and materials science centered on the theme of solar energy conversion and storage. Students will perform experiments involving optical spectroscopy, electrochemistry, laser spectroscopy, photochemistry, and photoelectrochemistry, culminating in the construction and testing of dye-sensitized solar cells. Students entering in the academic year 2020 and before must take Ch 3 in their first nine terms of residence in order to be graded pass/fail. First-year undergraduate students entering in the academic year 2021 and thereafter must take Ch 3 in their first six terms of residence in order to be graded pass/fail. Ch 3 a and Ch 3 x both satisfy the institute's Core requirement for a Chemistry Laboratory.