Thermally Stable and Efficient Planar-type Perovskite Solar Cells by Employing a Novel Small Molecule Additive IDTT-Based Additive
발표자
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초록
내용
Perovskite solar cells (PSCs) have emerged as one of the most promising next-generation photovoltaics due to superior optoelectronic properties and solution processability. However, defects presenting in PSCs are still not completely resolved, which could induce lowering device performance. To passivate those defects, an indacenodithieno[3,2-b]thiophene-based small molecule (SM) additive (IDTT-ThCz) is introduced. IDTT-ThCz molecule could not only interact with perovskite and passivate defects but also improve the charge extraction capability. As a result, the IDTT-ThCz-treated PSCs achieves a maximum power conversion efficiency (PCE) of 22.5% and maintains 95% of original PCE after 500 h storage under thermal condition (85 °C).