We report a novel electron-rich molecule based on 3,4-ethylenedioxythiophene (H101). When used as the hole-transporting layer in a perovskite-based solar cell, the power-conversion efficiency reached 13.8 % under AM 1.5G solar simulation.
This result is comparable with that obtained using the well-known hole transporting material 2,2′,7,7′-tetrakis(N,N-di-p-methoxyphenylamine)-9,9′-spirobifluorene (spiro-OMeTAD). This is the first heterocycle-containing material achieving >10 % efficiency in such devices, and has great potential to replace the expensive spiro-OMeTAD given its much simpler and cheaper synthesis.
Li, H., Fu, K., Hagfeldt, A., Grätzel, M., Mhaisalkar, S.G. and Grimsdale, A.C., 2014. A Simple 3, 4‐Ethylenedioxythiophene Based Hole‐Transporting Material for Perovskite Solar Cells. Angewandte Chemie International Edition, 53(16), pp.4085-4088.
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Category: Solar & Photovoltaics