The Role of Grain Boundaries in Perovskite Solar Cells
Andrés‐Felipe Castro‐MendezSchool of Materials Science and Engineering Georgia Institute of Technology Atlanta GA 30332 USAJuanita HidalgoSchool of Materials Science and Engineering Georgia Institute of Technology Atlanta GA 30332 USAJuan‐Pablo Correa‐BaenaSchool of Materials Science and Engineering Georgia Institute of Technology Atlanta GA 30332 USA
2019en
ABI
Abstract
Abstract Grain boundaries (GBs) play an important role in most polycrystalline solar cells. In perovskite solar cells, the research community is just starting to understand their effects on performance and long‐term durability. In this essay, three important questions are explored: Do GBs affect: 1) recombination and thus open‐circuit voltage? Not dramatically, if at all; 2) current–voltage hysteresis? Most studies show that hysteresis is dominated by defects at GBs; and 3) long‐term durability? Yes, GBs definitely help increase the rate of perovskite degradation. In this essay, the latest reports are summarized and the authors' perspective on this very important subject is given.
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