Sub-150 °c processed meso-superstructured perovskite solar cells with enhanced efficiency

Journal article

The ability to process amorphous or polycrystalline solar cells at low temperature (<150 °C) opens many possibilities for substrate choice and monolithic multijunction solar cell fabrication. Organometal trihalide perovskite solar cells have evolved rapidly over the last two years, and the CH3NH3PbX3 (X = Cl, I or Br) material is processed at low temperature. However the first embodiments of the solar cell were composed of high temperature processed (500 °C) compact and mesoporous layers of TiO2. The sintering of the mesoporous TiO2 has been negated by replacing this with a mesoporous insulating scaffold in the meso-superstructured solar cell (MSSC), yet the high temperature processed compact TiO2 layer still persists in the most efficient devices. Here we have realised a low temperature route for compact TiO2, tailored for perovskite MSSC operation. With our optimized formulation we demonstrate full sun solar power conversion efficiencies of up to 15.9% in an all low temperature processed solar cell. © 2014 The Royal Society of Chemistry.

Authors: Wojciechowski, K; Saliba, M; Leijtens, T; Abate, A; Snaith, H

• Journal: Energy and Environmental Science
• Volume: 7
• Issue: 3
• Pages: 1142-1147
• Publication date: 2014-03-01
• DOI: 10.1039/c3ee43707h
• EISSN: 1754-5706
• ISSN: 1754-5692