Abstract
We present a design theory for a two-terminal series perovskite (PVK)/silicon (Si) tandem solar cell. The development of this device requires PVK materials with a wide bandgap of about 1.7 eV for current matching with Si. On the other hand, in the current state of research and development, high quality as a single PVK cell has been obtained with materials having a lower bandgap (<1.6 eV). In this article, we focus on a design in which the top and bottom cells are divided into multiple cells and connected in series as an approach to adjust the current matching condition that limits the bandgap of the top cell, clarify its optimization and effectiveness by model calculations, and present an example of an optimal monolithic design.
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