Metal–Organic Frameworks at Interfaces in Dye‐Sensitized Solar Cells

Abstract ZIF‐8, a kind of widely studied metal‐organic frameworks, was used for the interfacial modification of dye‐sensitized solar cells by a facile post‐treatment strategy for the first time, which solved the problem of severely decreased short‐circuit photocurrent in previous report. After the surface treatment, the performance of cells was obviously improved. The conditions for the deposition of ZIF‐8 were optimized. The best photovoltaic property was obtained when the growth time of ZIF‐8 was 7 min and the TiO 2 photoanode was post‐treated for 2 times. Besides the energy barrier effect of ZIF‐8 that improved the open‐circuit photovoltage and electron lifetime, the dyes adsorbed tightly on TiO 2 surface was found to be a key point for the efficient electron injection and improved performance.