Realizing High Efficiency over 20% of Low‐Bandgap Pb–Sn‐Alloyed Perovskite Solar Cells by In Situ Reduction of Sn4+
Abstract
Although the theoretical power conversion efficiency (PCE) of low‐bandgap Pb–Sn‐alloyed perovskite solar cells (PSCs) is higher than that of its conventional pure Pb counterpart, its device performance currently has been severely restricted by the large open‐circuit voltage ( V oc ) loss. Herein, it is discovered that the Sn 4+ ‐induced trap states of the perovskite film can be effectively suppressed by introducing excess Sn powder into the...
Paper Details
Title
Realizing High Efficiency over 20% of Low‐Bandgap Pb–Sn‐Alloyed Perovskite Solar Cells by In Situ Reduction of Sn4+
Published Date
Dec 5, 2019
Journal
Volume
4
Issue
3
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