AI Article Synopsis
- Lead-free tin halide perovskite solar cells have made strides in power conversion efficiency but face limitations from energy level mismatches and weak interactions with electron transport materials.
- A new fluorinated fullerene derivative (C-FTPA) was developed to enhance the electron transport material when combined with a previously studied derivative (C-ETPA).
- This new binary electron transport material showed improved molecular structure and interactions, leading to a notable increase in power conversion efficiency, reaching 11.93%.
Article Abstract
Lead-free tin halide perovskite solar cells (TPSCs) have recently made significant progress in power conversion efficiency (PCE). However, the presence of mismatched energy levels and weak interlayer interactions between the electron transport materials (ETMs) and tin perovskites has limited the achievable PCE. Here, a new fluorinated fullerene derivative, C-FTPA (F12), was designed and synthesized to construct a binary ETM with C-ETPA (F6) reported in our group, resulting in a reduction in defects and improved molecular structure ordering. Furthermore, the binary ETM exhibited a stronger interaction with the tin perovskite and delivered a PCE up to 11.93%.
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Article Synopsis
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