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Spiro-Phenylpyrazole/Fluorene as Hole-Transporting Material for Perovskite Solar Cells.

ABSTRACT: Spiro-OMeTAD with symmetric spiro-bifluorene unit has dominated the investigation of hole-transporting material (HTM) for efficient perovskite solar cells (PSCs) despite of its low intrinsic hole conductivity and instability. In this study, we designed and synthesized three asymmetric spiro-phenylpyrazole/fluorene base HTMs, namely: WY-1, WY-2 and WY-3. They exhibit excellent electrochemical properties and hole conductivities. Moreover, the PSC based on WY-1 exhibits the highest power conversion efficiency (PCE) of 14.2%, which is comparable to the control device employing spiro-OMeTAD as HTM (14.8%). These results pave the way to further optimization of both molecular design and device performance of the spiro-based HTMs.

SUBMITTER: Wang Y

PROVIDER: S-EPMC5552831 | biostudies-other | 2017 Aug

REPOSITORIES: biostudies-other

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Spiro-Phenylpyrazole/Fluorene as Hole-Transporting Material for Perovskite Solar Cells.

Wang Yang Y Su Tzu-Sen TS Tsai Han-Yan HY Wei Tzu-Chien TC Chi Yun Y

Scientific reports 20170810 1

Spiro-OMeTAD with symmetric spiro-bifluorene unit has dominated the investigation of hole-transporting material (HTM) for efficient perovskite solar cells (PSCs) despite of its low intrinsic hole conductivity and instability. In this study, we designed and synthesized three asymmetric spiro-phenylpyrazole/fluorene base HTMs, namely: WY-1, WY-2 and WY-3. They exhibit excellent electrochemical properties and hole conductivities. Moreover, the PSC based on WY-1 exhibits the highest power conversion ...[more]

PMID: 28798387

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